Code sample: connect to network, fetch raw HTML
Change-Id: I8e2e61be59016783bf21d9ac1981e46e3725308b
(cherry picked from commit d9a6ccf5987da00460c10c554bd5404b7c3b2a03)
diff --git a/connectivity/NetworkConnect/AndroidManifest.xml b/connectivity/NetworkConnect/AndroidManifest.xml
new file mode 100755
index 0000000..09fd2ee
--- /dev/null
+++ b/connectivity/NetworkConnect/AndroidManifest.xml
@@ -0,0 +1,44 @@
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<manifest
+ xmlns:android="http://schemas.android.com/apk/res/android"
+ package="com.example.android.networkconnect"
+ android:versionCode="1"
+ android:versionName="1.0">
+
+ <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="17" />
+ <uses-permission android:name="android.permission.INTERNET" />
+ <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
+
+ <application
+ android:label="@string/app_name"
+ android:icon="@drawable/ic_launcher"
+ android:theme="@style/Theme.Sample"
+ android:allowBackup="true">
+
+ <activity
+ android:name="com.example.android.networkconnect.MainActivity"
+ android:label="@string/app_name"
+ android:uiOptions="splitActionBarWhenNarrow">
+
+ <intent-filter>
+ <action android:name="android.intent.action.MAIN" />
+ <category android:name="android.intent.category.LAUNCHER" />
+ </intent-filter>
+ </activity>
+ </application>
+</manifest>
diff --git a/connectivity/NetworkConnect/res/drawable-hdpi/ic_launcher.png b/connectivity/NetworkConnect/res/drawable-hdpi/ic_launcher.png
new file mode 100755
index 0000000..22ce606
--- /dev/null
+++ b/connectivity/NetworkConnect/res/drawable-hdpi/ic_launcher.png
Binary files differ
diff --git a/connectivity/NetworkConnect/res/drawable-mdpi/ic_launcher.png b/connectivity/NetworkConnect/res/drawable-mdpi/ic_launcher.png
new file mode 100755
index 0000000..f21e17b
--- /dev/null
+++ b/connectivity/NetworkConnect/res/drawable-mdpi/ic_launcher.png
Binary files differ
diff --git a/connectivity/NetworkConnect/res/drawable-xhdpi/ic_launcher.png b/connectivity/NetworkConnect/res/drawable-xhdpi/ic_launcher.png
new file mode 100755
index 0000000..64b8059
--- /dev/null
+++ b/connectivity/NetworkConnect/res/drawable-xhdpi/ic_launcher.png
Binary files differ
diff --git a/connectivity/NetworkConnect/res/drawable-xxhdpi/ic_launcher.png b/connectivity/NetworkConnect/res/drawable-xxhdpi/ic_launcher.png
new file mode 100755
index 0000000..6b4434a
--- /dev/null
+++ b/connectivity/NetworkConnect/res/drawable-xxhdpi/ic_launcher.png
Binary files differ
diff --git a/connectivity/NetworkConnect/res/layout/activity_main.xml b/connectivity/NetworkConnect/res/layout/activity_main.xml
new file mode 100755
index 0000000..f21b1ac
--- /dev/null
+++ b/connectivity/NetworkConnect/res/layout/activity_main.xml
@@ -0,0 +1,40 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<LinearLayout
+ xmlns:android="http://schemas.android.com/apk/res/android"
+ android:orientation="vertical"
+ android:layout_width="fill_parent"
+ android:layout_height="fill_parent">
+ <fragment
+ android:name="com.example.android.common.SimpleTextFragment"
+ android:id="@+id/intro_fragment"
+ android:layout_weight="1"
+ android:layout_width="match_parent"
+ android:layout_height="match_parent" />
+ <View
+ android:layout_width="fill_parent"
+ android:layout_height="1dp"
+ android:background="@android:color/darker_gray"/>
+ <fragment
+ android:name="com.example.android.networkconnect.LogFragment"
+ android:id="@+id/log_fragment"
+ android:layout_weight="1"
+ android:layout_width="match_parent"
+ android:layout_height="match_parent" />
+</LinearLayout>
diff --git a/connectivity/NetworkConnect/res/layout/log_fragment.xml b/connectivity/NetworkConnect/res/layout/log_fragment.xml
new file mode 100644
index 0000000..6d79548
--- /dev/null
+++ b/connectivity/NetworkConnect/res/layout/log_fragment.xml
@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
+ android:id="@+id/log_scroll"
+ android:layout_width="match_parent"
+ android:layout_height="match_parent">
+
+ <com.example.android.common.logger.LogView
+ android:id="@+id/sample_output"
+ style="@style/Log"
+ android:layout_width="match_parent"
+ android:layout_height="wrap_content"
+ android:clickable="true"
+ android:focusable="true"
+ android:text=""
+ android:gravity="bottom" />
+</ScrollView>
\ No newline at end of file
diff --git a/connectivity/NetworkConnect/res/menu/main.xml b/connectivity/NetworkConnect/res/menu/main.xml
new file mode 100644
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--- /dev/null
+++ b/connectivity/NetworkConnect/res/menu/main.xml
@@ -0,0 +1,24 @@
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+ <item android:id="@+id/fetch_action"
+ android:showAsAction="ifRoom|withText"
+ android:title="@string/fetch_text" />
+ <item android:id="@+id/clear_action"
+ android:showAsAction="ifRoom|withText"
+ android:title="@string/clear_text" />
+</menu>
diff --git a/connectivity/NetworkConnect/res/values-sw600dp/styles.xml b/connectivity/NetworkConnect/res/values-sw600dp/styles.xml
new file mode 100644
index 0000000..ffcbe8a
--- /dev/null
+++ b/connectivity/NetworkConnect/res/values-sw600dp/styles.xml
@@ -0,0 +1,28 @@
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<resources>
+
+ <style name="Widget.SampleOutput">
+ <item name="android:paddingTop">@dimen/margin_medium</item>
+ <item name="android:paddingBottom">@dimen/margin_medium</item>
+ <item name="android:paddingLeft">@dimen/margin_huge</item>
+ <item name="android:paddingRight">@dimen/margin_huge</item>
+ <item name="android:textAppearance">?android:textAppearanceLarge</item>
+ <item name="android:lineSpacingMultiplier">1.2</item>
+ </style>
+
+</resources>
diff --git a/connectivity/NetworkConnect/res/values-v11/styles.xml b/connectivity/NetworkConnect/res/values-v11/styles.xml
new file mode 100644
index 0000000..c6c648b
--- /dev/null
+++ b/connectivity/NetworkConnect/res/values-v11/styles.xml
@@ -0,0 +1,19 @@
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<resources>
+ <style name="Theme.Base" parent="android:Theme.Holo.Light" />
+</resources>
diff --git a/connectivity/NetworkConnect/res/values/dimens.xml b/connectivity/NetworkConnect/res/values/dimens.xml
new file mode 100644
index 0000000..4f69897
--- /dev/null
+++ b/connectivity/NetworkConnect/res/values/dimens.xml
@@ -0,0 +1,24 @@
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<resources>
+
+ <!-- Define standard dimensions to comply with Holo-style grids and rhythm. -->
+
+ <dimen name="margin_medium">16dp</dimen>
+ <dimen name="margin_huge">64dp</dimen>
+
+</resources>
diff --git a/connectivity/NetworkConnect/res/values/strings.xml b/connectivity/NetworkConnect/res/values/strings.xml
new file mode 100755
index 0000000..756f4a7
--- /dev/null
+++ b/connectivity/NetworkConnect/res/values/strings.xml
@@ -0,0 +1,27 @@
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<resources>
+ <string name="app_name">Network Connect</string>
+
+ <string name="intro_message">Welcome to Network Connect!
+ Click FETCH to fetch the first 500 characters of raw HTML from www.google.com.
+ </string>
+
+ <string name="fetch_text">Fetch</string>
+ <string name="clear_text">Clear</string>
+ <string name="connection_error">Connection error.</string>
+</resources>
diff --git a/connectivity/NetworkConnect/res/values/styles.xml b/connectivity/NetworkConnect/res/values/styles.xml
new file mode 100644
index 0000000..4d9bb98
--- /dev/null
+++ b/connectivity/NetworkConnect/res/values/styles.xml
@@ -0,0 +1,40 @@
+<!--
+ Copyright 2013 The Android Open Source Project
+
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+ Unless required by applicable law or agreed to in writing, software
+ distributed under thegi License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License.
+ -->
+
+<resources>
+
+ <!-- Activity themes -->
+
+ <style name="Theme.Base" parent="android:Theme.Light" />
+
+ <style name="Theme.Sample" parent="Theme.Base" />
+
+ <!-- Widget styling -->
+
+ <style name="Widget" />
+
+ <style name="Widget.SampleOutput">
+ <item name="android:padding">@dimen/margin_medium</item>
+ <item name="android:textAppearance">?android:textAppearanceMedium</item>
+ <item name="android:lineSpacingMultiplier">1.1</item>
+ </style>
+
+ <style name="Log" parent="Widget.SampleOutput">
+ <item name="android:typeface">monospace</item>
+ </style>
+
+
+</resources>
diff --git a/connectivity/NetworkConnect/src/com/example/android/common/SimpleTextFragment.java b/connectivity/NetworkConnect/src/com/example/android/common/SimpleTextFragment.java
new file mode 100644
index 0000000..a2be93f
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/common/SimpleTextFragment.java
@@ -0,0 +1,99 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.common;
+
+import android.os.Bundle;
+
+import android.support.v4.app.Fragment;
+import android.util.Log;
+import android.view.Gravity;
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.TextView;
+
+/**
+ * Simple fragment containing only a TextView. Used by TextPagerAdapter to create
+ * tutorial-style pages for apps.
+ */
+public class SimpleTextFragment extends Fragment {
+
+ // Contains the text that will be displayed by this Fragment
+ String mText;
+
+ // Contains a resource ID for the text that will be displayed by this fragment.
+ int mTextId = -1;
+
+ // Keys which will be used to store/retrieve text passed in via setArguments.
+ public static final String TEXT_KEY = "text";
+ public static final String TEXT_ID_KEY = "text_id";
+
+ // For situations where the app wants to modify text at Runtime, exposing the TextView.
+ private TextView mTextView;
+
+ public SimpleTextFragment() {
+ }
+
+ @Override
+ public View onCreateView(LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState) {
+ // Before initializing the textView, check if any arguments were provided via setArguments.
+ processArguments();
+
+ // Create a new TextView and set its text to whatever was provided.
+ mTextView = new TextView(getActivity());
+ mTextView.setGravity(Gravity.CENTER);
+
+ if (mText != null) {
+ mTextView.setText(mText);
+ Log.i("SimpleTextFragment", mText);
+ }
+ return mTextView;
+ }
+
+ public TextView getTextView() {
+ return mTextView;
+ }
+
+ /**
+ * Changes the text for this TextView, according to the resource ID provided.
+ * @param stringId A resource ID representing the text content for this Fragment's TextView.
+ */
+ public void setText(int stringId) {
+ getTextView().setText(getActivity().getString(stringId));
+ }
+
+ /**
+ * Processes the arguments passed into this Fragment via setArguments method.
+ * Currently the method only looks for text or a textID, nothing else.
+ */
+ public void processArguments() {
+ // For most objects we'd handle the multiple possibilities for initialization variables
+ // as multiple constructors. For Fragments, however, it's customary to use
+ // setArguments / getArguments.
+ if (getArguments() != null) {
+ Bundle args = getArguments();
+ if (args.containsKey(TEXT_KEY)) {
+ mText = args.getString(TEXT_KEY);
+ Log.d("Constructor", "Added Text.");
+ } else if (args.containsKey(TEXT_ID_KEY)) {
+ mTextId = args.getInt(TEXT_ID_KEY);
+ mText = getString(mTextId);
+ }
+ }
+ }
+}
\ No newline at end of file
diff --git a/connectivity/NetworkConnect/src/com/example/android/common/logger/Log.java b/connectivity/NetworkConnect/src/com/example/android/common/logger/Log.java
new file mode 100644
index 0000000..cf4abb7
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/common/logger/Log.java
@@ -0,0 +1,236 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.android.common.logger;
+
+/**
+ * Helper class for a list (or tree) of LoggerNodes.
+ *
+ * <p>When this is set as the head of the list,
+ * an instance of it can function as a drop-in replacement for {@link android.util.Log}.
+ * Most of the methods in this class server only to map a method call in Log to its equivalent
+ * in LogNode.</p>
+ */
+public class Log {
+ // Grabbing the native values from Android's native logging facilities,
+ // to make for easy migration and interop.
+ public static final int NONE = -1;
+ public static final int VERBOSE = android.util.Log.VERBOSE;
+ public static final int DEBUG = android.util.Log.DEBUG;
+ public static final int INFO = android.util.Log.INFO;
+ public static final int WARN = android.util.Log.WARN;
+ public static final int ERROR = android.util.Log.ERROR;
+ public static final int ASSERT = android.util.Log.ASSERT;
+
+ // Stores the beginning of the LogNode topology.
+ private static LogNode mLogNode;
+
+ /**
+ * Returns the next LogNode in the linked list.
+ */
+ public static LogNode getLogNode() {
+ return mLogNode;
+ }
+
+ /**
+ * Sets the LogNode data will be sent to.
+ */
+ public static void setLogNode(LogNode node) {
+ mLogNode = node;
+ }
+
+ /**
+ * Instructs the LogNode to print the log data provided. Other LogNodes can
+ * be chained to the end of the LogNode as desired.
+ *
+ * @param priority Log level of the data being logged. Verbose, Error, etc.
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void println(int priority, String tag, String msg, Throwable tr) {
+ if (mLogNode != null) {
+ mLogNode.println(priority, tag, msg, tr);
+ }
+ }
+
+ /**
+ * Instructs the LogNode to print the log data provided. Other LogNodes can
+ * be chained to the end of the LogNode as desired.
+ *
+ * @param priority Log level of the data being logged. Verbose, Error, etc.
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged. The actual message to be logged.
+ */
+ public static void println(int priority, String tag, String msg) {
+ println(priority, tag, msg, null);
+ }
+
+ /**
+ * Prints a message at VERBOSE priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void v(String tag, String msg, Throwable tr) {
+ println(VERBOSE, tag, msg, tr);
+ }
+
+ /**
+ * Prints a message at VERBOSE priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ */
+ public static void v(String tag, String msg) {
+ v(tag, msg, null);
+ }
+
+
+ /**
+ * Prints a message at DEBUG priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void d(String tag, String msg, Throwable tr) {
+ println(DEBUG, tag, msg, tr);
+ }
+
+ /**
+ * Prints a message at DEBUG priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ */
+ public static void d(String tag, String msg) {
+ d(tag, msg, null);
+ }
+
+ /**
+ * Prints a message at INFO priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void i(String tag, String msg, Throwable tr) {
+ println(INFO, tag, msg, tr);
+ }
+
+ /**
+ * Prints a message at INFO priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ */
+ public static void i(String tag, String msg) {
+ i(tag, msg, null);
+ }
+
+ /**
+ * Prints a message at WARN priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void w(String tag, String msg, Throwable tr) {
+ println(WARN, tag, msg, tr);
+ }
+
+ /**
+ * Prints a message at WARN priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ */
+ public static void w(String tag, String msg) {
+ w(tag, msg, null);
+ }
+
+ /**
+ * Prints a message at WARN priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void w(String tag, Throwable tr) {
+ w(tag, null, tr);
+ }
+
+ /**
+ * Prints a message at ERROR priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void e(String tag, String msg, Throwable tr) {
+ println(ERROR, tag, msg, tr);
+ }
+
+ /**
+ * Prints a message at ERROR priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ */
+ public static void e(String tag, String msg) {
+ e(tag, msg, null);
+ }
+
+ /**
+ * Prints a message at ASSERT priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void wtf(String tag, String msg, Throwable tr) {
+ println(ASSERT, tag, msg, tr);
+ }
+
+ /**
+ * Prints a message at ASSERT priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged.
+ */
+ public static void wtf(String tag, String msg) {
+ wtf(tag, msg, null);
+ }
+
+ /**
+ * Prints a message at ASSERT priority.
+ *
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public static void wtf(String tag, Throwable tr) {
+ wtf(tag, null, tr);
+ }
+}
\ No newline at end of file
diff --git a/connectivity/NetworkConnect/src/com/example/android/common/logger/LogNode.java b/connectivity/NetworkConnect/src/com/example/android/common/logger/LogNode.java
new file mode 100644
index 0000000..bc37cab
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/common/logger/LogNode.java
@@ -0,0 +1,39 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.android.common.logger;
+
+/**
+ * Basic interface for a logging system that can output to one or more targets.
+ * Note that in addition to classes that will output these logs in some format,
+ * one can also implement this interface over a filter and insert that in the chain,
+ * such that no targets further down see certain data, or see manipulated forms of the data.
+ * You could, for instance, write a "ToHtmlLoggerNode" that just converted all the log data
+ * it received to HTML and sent it along to the next node in the chain, without printing it
+ * anywhere.
+ */
+public interface LogNode {
+
+ /**
+ * Instructs first LogNode in the list to print the log data provided.
+ * @param priority Log level of the data being logged. Verbose, Error, etc.
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged. The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ public void println(int priority, String tag, String msg, Throwable tr);
+
+}
diff --git a/connectivity/NetworkConnect/src/com/example/android/common/logger/LogView.java b/connectivity/NetworkConnect/src/com/example/android/common/logger/LogView.java
new file mode 100644
index 0000000..953b8b1
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/common/logger/LogView.java
@@ -0,0 +1,133 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.android.common.logger;
+
+import android.content.Context;
+import android.util.*;
+import android.widget.TextView;
+
+/** Simple TextView which is used to output log data received through the LogNode interface.
+*/
+public class LogView extends TextView implements LogNode {
+
+ public LogView(Context context) {
+ super(context);
+ }
+
+ public LogView(Context context, AttributeSet attrs) {
+ super(context, attrs);
+ }
+
+ public LogView(Context context, AttributeSet attrs, int defStyle) {
+ super(context, attrs, defStyle);
+ }
+
+ /**
+ * Formats the log data and prints it out to the LogView.
+ * @param priority Log level of the data being logged. Verbose, Error, etc.
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged. The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ @Override
+ public void println(int priority, String tag, String msg, Throwable tr) {
+ String priorityStr = null;
+
+ // For the purposes of this View, we want to print the priority as readable text.
+ switch(priority) {
+ case android.util.Log.VERBOSE:
+ priorityStr = "VERBOSE";
+ break;
+ case android.util.Log.DEBUG:
+ priorityStr = "DEBUG";
+ break;
+ case android.util.Log.INFO:
+ priorityStr = "INFO";
+ break;
+ case android.util.Log.WARN:
+ priorityStr = "WARN";
+ break;
+ case android.util.Log.ERROR:
+ priorityStr = "ERROR";
+ break;
+ case android.util.Log.ASSERT:
+ priorityStr = "ASSERT";
+ break;
+ default:
+ break;
+ }
+
+ // Handily, the Log class has a facility for converting a stack trace into a usable string.
+ String exceptionStr = null;
+ if (tr != null) {
+ exceptionStr = android.util.Log.getStackTraceString(tr);
+ }
+
+ // Take the priority, tag, message, and exception, and concatenate as necessary
+ // into one usable line of text.
+ StringBuilder outputBuilder = new StringBuilder();
+
+ String delimiter = "\t";
+ appendIfNotNull(outputBuilder, priorityStr, delimiter);
+ appendIfNotNull(outputBuilder, tag, delimiter);
+ appendIfNotNull(outputBuilder, msg, delimiter);
+ appendIfNotNull(outputBuilder, exceptionStr, delimiter);
+
+ // Actually display the text we just generated within the LogView.
+ appendToLog(outputBuilder.toString());
+
+ if (mNext != null) {
+ mNext.println(priority, tag, msg, tr);
+ }
+ }
+
+ public LogNode getNext() {
+ return mNext;
+ }
+
+ public void setNext(LogNode node) {
+ mNext = node;
+ }
+
+ /** Takes a string and adds to it, with a separator, if the bit to be added isn't null. Since
+ * the logger takes so many arguments that might be null, this method helps cut out some of the
+ * agonizing tedium of writing the same 3 lines over and over.
+ * @param source StringBuilder containing the text to append to.
+ * @param addStr The String to append
+ * @param delimiter The String to separate the source and appended strings. A tab or comma,
+ * for instance.
+ * @return The fully concatenated String as a StringBuilder
+ */
+ private StringBuilder appendIfNotNull(StringBuilder source, String addStr, String delimiter) {
+ if (addStr != null) {
+ if (addStr.length() == 0) {
+ delimiter = "";
+ }
+
+ return source.append(addStr).append(delimiter);
+ }
+ return source;
+ }
+
+ // The next LogNode in the chain.
+ LogNode mNext;
+
+ /** Outputs the string as a new line of log data in the LogView. */
+ public void appendToLog(String s) {
+ append("\n" + s);
+ }
+}
diff --git a/connectivity/NetworkConnect/src/com/example/android/common/logger/LogWrapper.java b/connectivity/NetworkConnect/src/com/example/android/common/logger/LogWrapper.java
new file mode 100644
index 0000000..ea8e20e
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/common/logger/LogWrapper.java
@@ -0,0 +1,75 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.android.common.logger;
+
+import android.util.Log;
+
+/**
+ * Helper class which wraps Android's native Log utility in the Logger interface. This way
+ * normal DDMS output can be one of the many targets receiving and outputting logs simultaneously.
+ */
+public class LogWrapper implements LogNode {
+
+ // For piping: The next node to receive Log data after this one has done its work.
+ private LogNode mNext;
+
+ /**
+ * Returns the next LogNode in the linked list.
+ */
+ public LogNode getNext() {
+ return mNext;
+ }
+
+ /**
+ * Sets the LogNode data will be sent to..
+ */
+ public void setNext(LogNode node) {
+ mNext = node;
+ }
+
+ /**
+ * Prints data out to the console using Android's native log mechanism.
+ * @param priority Log level of the data being logged. Verbose, Error, etc.
+ * @param tag Tag for for the log data. Can be used to organize log statements.
+ * @param msg The actual message to be logged. The actual message to be logged.
+ * @param tr If an exception was thrown, this can be sent along for the logging facilities
+ * to extract and print useful information.
+ */
+ @Override
+ public void println(int priority, String tag, String msg, Throwable tr) {
+ // There actually are log methods that don't take a msg parameter. For now,
+ // if that's the case, just convert null to the empty string and move on.
+ String useMsg = msg;
+ if (useMsg == null) {
+ useMsg = "";
+ }
+
+ // If an exeption was provided, convert that exception to a usable string and attach
+ // it to the end of the msg method.
+ if (tr != null) {
+ msg += "\n" + Log.getStackTraceString(tr);
+ }
+
+ // This is functionally identical to Log.x(tag, useMsg);
+ // For instance, if priority were Log.VERBOSE, this would be the same as Log.v(tag, useMsg)
+ Log.println(priority, tag, useMsg);
+
+ // If this isn't the last node in the chain, move things along.
+ if (mNext != null) {
+ mNext.println(priority, tag, msg, tr);
+ }
+ }
+}
\ No newline at end of file
diff --git a/connectivity/NetworkConnect/src/com/example/android/common/logger/MessageOnlyLogFilter.java b/connectivity/NetworkConnect/src/com/example/android/common/logger/MessageOnlyLogFilter.java
new file mode 100644
index 0000000..c57a111
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/common/logger/MessageOnlyLogFilter.java
@@ -0,0 +1,60 @@
+/*
+ * Copyright (C) 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package com.example.android.common.logger;
+
+/**
+ * Simple {@link LogNode} filter, removes everything except the message.
+ * Useful for situations like on-screen log output where you don't want a lot of metadata displayed,
+ * just easy-to-read message updates as they're happening.
+ */
+public class MessageOnlyLogFilter implements LogNode {
+
+ LogNode mNext;
+
+ /**
+ * Takes the "next" LogNode as a parameter, to simplify chaining.
+ *
+ * @param next The next LogNode in the pipeline.
+ */
+ public MessageOnlyLogFilter(LogNode next) {
+ mNext = next;
+ }
+
+ public MessageOnlyLogFilter() {
+ }
+
+ @Override
+ public void println(int priority, String tag, String msg, Throwable tr) {
+ if (mNext != null) {
+ getNext().println(Log.NONE, null, msg, null);
+ }
+ }
+
+ /**
+ * Returns the next LogNode in the linked list.
+ */
+ public LogNode getNext() {
+ return mNext;
+ }
+
+ /**
+ * Sets the LogNode data will be sent to..
+ */
+ public void setNext(LogNode node) {
+ mNext = node;
+ }
+
+}
\ No newline at end of file
diff --git a/connectivity/NetworkConnect/src/com/example/android/networkconnect/LogFragment.java b/connectivity/NetworkConnect/src/com/example/android/networkconnect/LogFragment.java
new file mode 100644
index 0000000..655d428
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/networkconnect/LogFragment.java
@@ -0,0 +1,60 @@
+package com.example.android.networkconnect;
+
+import android.support.v4.app.Fragment;
+
+import com.example.android.networkconnect.R;
+import com.example.android.common.logger.LogView;
+
+import android.os.Bundle;
+
+import android.text.Editable;
+import android.text.TextWatcher;
+
+import android.view.LayoutInflater;
+import android.view.View;
+import android.view.ViewGroup;
+import android.widget.ScrollView;
+
+/**
+ * Simple fragment that contains a LogView and uses it to output log data it receives
+ * through the LogNode interface.
+ */
+public class LogFragment extends Fragment {
+
+ private LogView mLogView;
+
+ public LogFragment() {}
+
+ @Override
+ public View onCreateView(LayoutInflater inflater, ViewGroup container,
+ Bundle savedInstanceState) {
+
+ View result = inflater.inflate(R.layout.log_fragment, container, false);
+
+ mLogView = (LogView) result.findViewById(R.id.sample_output);
+
+ // Wire up so when the text changes, the view scrolls down.
+ final ScrollView scrollView =
+ ((ScrollView) result.findViewById(R.id.log_scroll));
+
+ mLogView.addTextChangedListener(new TextWatcher() {
+ @Override
+ public void beforeTextChanged(CharSequence s, int start, int count, int after) {}
+
+ @Override
+ public void onTextChanged(CharSequence s, int start, int before, int count) {}
+
+ @Override
+ public void afterTextChanged(Editable s) {
+ scrollView.fullScroll(ScrollView.FOCUS_DOWN);
+ }
+ });
+
+ return result;
+ }
+
+ public LogView getLogView() {
+ return mLogView;
+ }
+
+}
diff --git a/connectivity/NetworkConnect/src/com/example/android/networkconnect/MainActivity.java b/connectivity/NetworkConnect/src/com/example/android/networkconnect/MainActivity.java
new file mode 100755
index 0000000..ae1591d
--- /dev/null
+++ b/connectivity/NetworkConnect/src/com/example/android/networkconnect/MainActivity.java
@@ -0,0 +1,189 @@
+/*
+ * Copyright 2013 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.example.android.networkconnect;
+
+import android.os.AsyncTask;
+import android.os.Bundle;
+import android.support.v4.app.FragmentActivity;
+import android.util.TypedValue;
+import android.view.Menu;
+import android.view.MenuItem;
+
+import com.example.android.common.SimpleTextFragment;
+import com.example.android.common.logger.Log;
+import com.example.android.common.logger.LogWrapper;
+import com.example.android.common.logger.MessageOnlyLogFilter;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.UnsupportedEncodingException;
+import java.net.HttpURLConnection;
+import java.net.URL;
+
+/**
+ * Sample application demonstrating how to connect to the network and fetch raw
+ * HTML. It uses AsyncTask to do the fetch on a background thread. To establish
+ * the network connection, it uses HttpURLConnection.
+ *
+ * This sample uses the logging framework to display log output in the log
+ * fragment (LogFragment).
+ */
+public class MainActivity extends FragmentActivity {
+
+ public static final String TAG = "Network Connect";
+
+ // Reference to the fragment showing events, so we can clear it with a button
+ // as necessary.
+ private LogFragment mLogFragment;
+
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+ setContentView(R.layout.activity_main);
+
+ // Initialize text fragment that displays intro text.
+ SimpleTextFragment introFragment = (SimpleTextFragment)
+ getSupportFragmentManager().findFragmentById(R.id.intro_fragment);
+ introFragment.setText(R.string.intro_message);
+ introFragment.getTextView().setTextSize(TypedValue.COMPLEX_UNIT_DIP, 16.0f);
+
+ // Initialize the logging framework.
+ initializeLogging();
+ }
+
+ @Override
+ public boolean onCreateOptionsMenu(Menu menu) {
+ getMenuInflater().inflate(R.menu.main, menu);
+ return true;
+ }
+
+ @Override
+ public boolean onOptionsItemSelected(MenuItem item) {
+ switch (item.getItemId()) {
+ // When the user clicks FETCH, fetch the first 500 characters of
+ // raw HTML from www.google.com.
+ case R.id.fetch_action:
+ new DownloadTask().execute("http://www.google.com");
+ return true;
+ // Clear the log view fragment.
+ case R.id.clear_action:
+ mLogFragment.getLogView().setText("");
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Implementation of AsyncTask, to fetch the data in the background away from
+ * the UI thread.
+ */
+ private class DownloadTask extends AsyncTask<String, Void, String> {
+
+ @Override
+ protected String doInBackground(String... urls) {
+ try {
+ return loadFromNetwork(urls[0]);
+ } catch (IOException e) {
+ return getString(R.string.connection_error);
+ }
+ }
+
+ /**
+ * Uses the logging framework to display the output of the fetch
+ * operation in the log fragment.
+ */
+ @Override
+ protected void onPostExecute(String result) {
+ Log.i(TAG, result);
+ }
+ }
+
+ /** Initiates the fetch operation. */
+ private String loadFromNetwork(String urlString) throws IOException {
+ InputStream stream = null;
+ String str ="";
+
+ try {
+ stream = downloadUrl(urlString);
+ str = readIt(stream, 500);
+ } finally {
+ if (stream != null) {
+ stream.close();
+ }
+ }
+ return str;
+ }
+
+ /**
+ * Given a string representation of a URL, sets up a connection and gets
+ * an input stream.
+ * @param urlString A string representation of a URL.
+ * @return An InputStream retrieved from a successful HttpURLConnection.
+ * @throws IOException
+ */
+ private InputStream downloadUrl(String urlString) throws IOException {
+ // BEGIN_INCLUDE(get_inputstream)
+ URL url = new URL(urlString);
+ HttpURLConnection conn = (HttpURLConnection) url.openConnection();
+ conn.setReadTimeout(10000 /* milliseconds */);
+ conn.setConnectTimeout(15000 /* milliseconds */);
+ conn.setRequestMethod("GET");
+ conn.setDoInput(true);
+ // Start the query
+ conn.connect();
+ InputStream stream = conn.getInputStream();
+ return stream;
+ // END_INCLUDE(get_inputstream)
+ }
+
+ /** Reads an InputStream and converts it to a String.
+ * @param stream InputStream containing HTML from targeted site.
+ * @param len Length of string that this method returns.
+ * @return String concatenated according to len parameter.
+ * @throws IOException
+ * @throws UnsupportedEncodingException
+ */
+ private String readIt(InputStream stream, int len) throws IOException, UnsupportedEncodingException {
+ Reader reader = null;
+ reader = new InputStreamReader(stream, "UTF-8");
+ char[] buffer = new char[len];
+ reader.read(buffer);
+ return new String(buffer);
+ }
+
+ /** Create a chain of targets that will receive log data */
+ public void initializeLogging() {
+
+ // Using Log, front-end to the logging chain, emulates
+ // android.util.log method signatures.
+
+ // Wraps Android's native log framework
+ LogWrapper logWrapper = new LogWrapper();
+ Log.setLogNode(logWrapper);
+
+ // A filter that strips out everything except the message text.
+ MessageOnlyLogFilter msgFilter = new MessageOnlyLogFilter();
+ logWrapper.setNext(msgFilter);
+
+ // On screen logging via a fragment with a TextView.
+ mLogFragment =
+ (LogFragment) getSupportFragmentManager().findFragmentById(R.id.log_fragment);
+ msgFilter.setNext(mLogFragment.getLogView());
+ }
+}
