src/com/android/settings/bluetooth/RequestPermissionActivity.java - platform/packages/apps/Settings - Git at Google

 /*
  * Copyright (C) 2009 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.android.settings.bluetooth;

 import com.android.settings.R;

 import android.app.Activity;
 import android.app.AlertDialog;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.BroadcastReceiver;
 import android.content.Context;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.os.Bundle;
 import android.util.Log;

 /**
  * RequestPermissionActivity asks the user whether to enable discovery. This is
  * usually started by an application wanted to start bluetooth and or discovery
  */
 public class RequestPermissionActivity extends Activity implements
         DialogInterface.OnClickListener {
     // Command line to test this
     // adb shell am start -a android.bluetooth.adapter.action.REQUEST_ENABLE
     // adb shell am start -a android.bluetooth.adapter.action.REQUEST_DISCOVERABLE

     private static final String TAG = "RequestPermissionActivity";

     private static final int MAX_DISCOVERABLE_TIMEOUT = 3600; // 1 hr

     // Non-error return code: BT is starting or has started successfully. Used
     // by this Activity and RequestPermissionHelperActivity
     /* package */ static final int RESULT_BT_STARTING_OR_STARTED = -1000;

     private static final int REQUEST_CODE_START_BT = 1;

     private LocalBluetoothAdapter mLocalAdapter;

     private int mTimeout = BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT;

     /*
      * True if bluetooth wasn't enabled and RequestPermissionHelperActivity was
      * started to ask the user and start bt.
      *
      * If/when that activity returns successfully, display please wait msg then
      * go away when bt has started and discovery mode has been enabled.
      */
     private boolean mNeededToEnableBluetooth;

     // True if requesting BT to be turned on
     // False if requesting BT to be turned on + discoverable mode
     private boolean mEnableOnly;

     private boolean mUserConfirmed;

     private AlertDialog mDialog;

     private final BroadcastReceiver mReceiver = new BroadcastReceiver() {

         @Override
         public void onReceive(Context context, Intent intent) {
             if (intent == null) {
                 return;
             }
             if (mNeededToEnableBluetooth
                     && BluetoothAdapter.ACTION_STATE_CHANGED.equals(intent.getAction())) {
                 int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothDevice.ERROR);
                 if (state == BluetoothAdapter.STATE_ON) {
                     if (mUserConfirmed) {
                         proceedAndFinish();
                     }
                 }
             }
         }
     };

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);

         // Note: initializes mLocalAdapter and returns true on error
         if (parseIntent()) {
             finish();
             return;
         }

         int btState = mLocalAdapter.getState();

         switch (btState) {
             case BluetoothAdapter.STATE_OFF:
             case BluetoothAdapter.STATE_TURNING_OFF:
             case BluetoothAdapter.STATE_TURNING_ON:
                 /*
                  * Strictly speaking STATE_TURNING_ON belong with STATE_ON;
                  * however, BT may not be ready when the user clicks yes and we
                  * would fail to turn on discovery mode. By kicking this to the
                  * RequestPermissionHelperActivity, this class will handle that
                  * case via the broadcast receiver.
                  */

                 /*
                  * Start the helper activity to:
                  * 1) ask the user about enabling bt AND discovery
                  * 2) enable BT upon confirmation
                  */
                 registerReceiver(mReceiver,
                         new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
                 Intent intent = new Intent();
                 intent.setClass(this, RequestPermissionHelperActivity.class);
                 if (mEnableOnly) {
                     intent.setAction(RequestPermissionHelperActivity.ACTION_INTERNAL_REQUEST_BT_ON);
                 } else {
                     intent.setAction(RequestPermissionHelperActivity.
                             ACTION_INTERNAL_REQUEST_BT_ON_AND_DISCOVERABLE);
                     intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, mTimeout);
                 }
                 startActivityForResult(intent, REQUEST_CODE_START_BT);
                 mNeededToEnableBluetooth = true;
                 break;
             case BluetoothAdapter.STATE_ON:
                 if (mEnableOnly) {
                     // Nothing to do. Already enabled.
                     proceedAndFinish();
                 } else {
                     // Ask the user about enabling discovery mode
                     createDialog();
                 }
                 break;
             default:
                 Log.e(TAG, "Unknown adapter state: " + btState);
         }
     }

     private void createDialog() {
         AlertDialog.Builder builder = new AlertDialog.Builder(this);

         if (mNeededToEnableBluetooth) {
             // RequestPermissionHelperActivity has gotten confirmation from user
             // to turn on BT
             builder.setMessage(getString(R.string.bluetooth_turning_on));
             builder.setCancelable(false);
         } else {
             // Ask the user whether to turn on discovery mode or not
             // For lasting discoverable mode there is a different message
             if (mTimeout == BluetoothDiscoverableEnabler.DISCOVERABLE_TIMEOUT_NEVER) {
                 builder.setMessage(
                         getString(R.string.bluetooth_ask_lasting_discovery));
             } else {
                 builder.setMessage(
                         getString(R.string.bluetooth_ask_discovery, mTimeout));
             }
             builder.setPositiveButton(getString(R.string.allow), this);
             builder.setNegativeButton(getString(R.string.deny), this);
         }

         mDialog = builder.create();
         mDialog.show();

         if (getResources().getBoolean(R.bool.auto_confirm_bluetooth_activation_dialog) == true) {
             // dismiss dialog immediately if settings say so
             onClick(null, DialogInterface.BUTTON_POSITIVE);
         }
     }

     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (requestCode != REQUEST_CODE_START_BT) {
             Log.e(TAG, "Unexpected onActivityResult " + requestCode + ' ' + resultCode);
             setResult(RESULT_CANCELED);
             finish();
             return;
         }
         if (resultCode != RESULT_BT_STARTING_OR_STARTED) {
             setResult(resultCode);
             finish();
             return;
         }

         // Back from RequestPermissionHelperActivity. User confirmed to enable
         // BT and discoverable mode.
         mUserConfirmed = true;

         if (mLocalAdapter.getBluetoothState() == BluetoothAdapter.STATE_ON) {
             proceedAndFinish();
         } else {
             // If BT is not up yet, show "Turning on Bluetooth..."
             createDialog();
         }
     }

     public void onClick(DialogInterface dialog, int which) {
         switch (which) {
             case DialogInterface.BUTTON_POSITIVE:
                 proceedAndFinish();
                 break;

             case DialogInterface.BUTTON_NEGATIVE:
                 setResult(RESULT_CANCELED);
                 finish();
                 break;
         }
     }

     private void proceedAndFinish() {
         int returnCode;

         if (mEnableOnly) {
             // BT enabled. Done
             returnCode = RESULT_OK;
         } else if (mLocalAdapter.setScanMode(
                 BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE, mTimeout)) {
             // If already in discoverable mode, this will extend the timeout.
             long endTime = System.currentTimeMillis() + (long) mTimeout * 1000;
             LocalBluetoothPreferences.persistDiscoverableEndTimestamp(
                     this, endTime);
             if (0 < mTimeout) {
                BluetoothDiscoverableTimeoutReceiver.setDiscoverableAlarm(this, endTime);
             }
             returnCode = mTimeout;
             // Activity.RESULT_FIRST_USER should be 1
             if (returnCode < RESULT_FIRST_USER) {
                 returnCode = RESULT_FIRST_USER;
             }
         } else {
             returnCode = RESULT_CANCELED;
         }

         if (mDialog != null) {
             mDialog.dismiss();
         }

         setResult(returnCode);
         finish();
     }

     /**
      * Parse the received Intent and initialize mLocalBluetoothAdapter.
      * @return true if an error occurred; false otherwise
      */
     private boolean parseIntent() {
         Intent intent = getIntent();
         if (intent != null && intent.getAction().equals(BluetoothAdapter.ACTION_REQUEST_ENABLE)) {
             mEnableOnly = true;
         } else if (intent != null
                 && intent.getAction().equals(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE)) {
             mTimeout = intent.getIntExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,
                     BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT);

             Log.d(TAG, "Setting Bluetooth Discoverable Timeout = " + mTimeout);

             if (mTimeout < 0 || mTimeout > MAX_DISCOVERABLE_TIMEOUT) {
                 mTimeout = BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT;
             }
         } else {
             Log.e(TAG, "Error: this activity may be started only with intent "
                     + BluetoothAdapter.ACTION_REQUEST_ENABLE + " or "
                     + BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
             setResult(RESULT_CANCELED);
             return true;
         }

         LocalBluetoothManager manager = LocalBluetoothManager.getInstance(this);
         if (manager == null) {
             Log.e(TAG, "Error: there's a problem starting Bluetooth");
             setResult(RESULT_CANCELED);
             return true;
         }
         mLocalAdapter = manager.getBluetoothAdapter();

         return false;
     }

     @Override
     protected void onDestroy() {
         super.onDestroy();
         if (mNeededToEnableBluetooth) {
             unregisterReceiver(mReceiver);
         }
     }

     @Override
     public void onBackPressed() {
         setResult(RESULT_CANCELED);
         super.onBackPressed();
     }
 }
	/*
	* Copyright (C) 2009 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.android.settings.bluetooth;

	import com.android.settings.R;

	import android.app.Activity;
	import android.app.AlertDialog;
	import android.bluetooth.BluetoothAdapter;
	import android.bluetooth.BluetoothDevice;
	import android.content.BroadcastReceiver;
	import android.content.Context;
	import android.content.DialogInterface;
	import android.content.Intent;
	import android.content.IntentFilter;
	import android.os.Bundle;
	import android.util.Log;

	/**
	* RequestPermissionActivity asks the user whether to enable discovery. This is
	* usually started by an application wanted to start bluetooth and or discovery
	*/
	public class RequestPermissionActivity extends Activity implements
	DialogInterface.OnClickListener {
	// Command line to test this
	// adb shell am start -a android.bluetooth.adapter.action.REQUEST_ENABLE
	// adb shell am start -a android.bluetooth.adapter.action.REQUEST_DISCOVERABLE

	private static final String TAG = "RequestPermissionActivity";

	private static final int MAX_DISCOVERABLE_TIMEOUT = 3600; // 1 hr

	// Non-error return code: BT is starting or has started successfully. Used
	// by this Activity and RequestPermissionHelperActivity
	/* package */ static final int RESULT_BT_STARTING_OR_STARTED = -1000;

	private static final int REQUEST_CODE_START_BT = 1;

	private LocalBluetoothAdapter mLocalAdapter;

	private int mTimeout = BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT;

	/*
	* True if bluetooth wasn't enabled and RequestPermissionHelperActivity was
	* started to ask the user and start bt.
	*
	* If/when that activity returns successfully, display please wait msg then
	* go away when bt has started and discovery mode has been enabled.
	*/
	private boolean mNeededToEnableBluetooth;

	// True if requesting BT to be turned on
	// False if requesting BT to be turned on + discoverable mode
	private boolean mEnableOnly;

	private boolean mUserConfirmed;

	private AlertDialog mDialog;

	private final BroadcastReceiver mReceiver = new BroadcastReceiver() {

	@Override
	public void onReceive(Context context, Intent intent) {
	if (intent == null) {
	return;
	}
	if (mNeededToEnableBluetooth
	&& BluetoothAdapter.ACTION_STATE_CHANGED.equals(intent.getAction())) {
	int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothDevice.ERROR);
	if (state == BluetoothAdapter.STATE_ON) {
	if (mUserConfirmed) {
	proceedAndFinish();
	}
	}
	}
	}
	};

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);

	// Note: initializes mLocalAdapter and returns true on error
	if (parseIntent()) {
	finish();
	return;
	}

	int btState = mLocalAdapter.getState();

	switch (btState) {
	case BluetoothAdapter.STATE_OFF:
	case BluetoothAdapter.STATE_TURNING_OFF:
	case BluetoothAdapter.STATE_TURNING_ON:
	/*
	* Strictly speaking STATE_TURNING_ON belong with STATE_ON;
	* however, BT may not be ready when the user clicks yes and we
	* would fail to turn on discovery mode. By kicking this to the
	* RequestPermissionHelperActivity, this class will handle that
	* case via the broadcast receiver.
	*/

	/*
	* Start the helper activity to:
	* 1) ask the user about enabling bt AND discovery
	* 2) enable BT upon confirmation
	*/
	registerReceiver(mReceiver,
	new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED));
	Intent intent = new Intent();
	intent.setClass(this, RequestPermissionHelperActivity.class);
	if (mEnableOnly) {
	intent.setAction(RequestPermissionHelperActivity.ACTION_INTERNAL_REQUEST_BT_ON);
	} else {
	intent.setAction(RequestPermissionHelperActivity.
	ACTION_INTERNAL_REQUEST_BT_ON_AND_DISCOVERABLE);
	intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, mTimeout);
	}
	startActivityForResult(intent, REQUEST_CODE_START_BT);
	mNeededToEnableBluetooth = true;
	break;
	case BluetoothAdapter.STATE_ON:
	if (mEnableOnly) {
	// Nothing to do. Already enabled.
	proceedAndFinish();
	} else {
	// Ask the user about enabling discovery mode
	createDialog();
	}
	break;
	default:
	Log.e(TAG, "Unknown adapter state: " + btState);
	}
	}

	private void createDialog() {
	AlertDialog.Builder builder = new AlertDialog.Builder(this);

	if (mNeededToEnableBluetooth) {
	// RequestPermissionHelperActivity has gotten confirmation from user
	// to turn on BT
	builder.setMessage(getString(R.string.bluetooth_turning_on));
	builder.setCancelable(false);
	} else {
	// Ask the user whether to turn on discovery mode or not
	// For lasting discoverable mode there is a different message
	if (mTimeout == BluetoothDiscoverableEnabler.DISCOVERABLE_TIMEOUT_NEVER) {
	builder.setMessage(
	getString(R.string.bluetooth_ask_lasting_discovery));
	} else {
	builder.setMessage(
	getString(R.string.bluetooth_ask_discovery, mTimeout));
	}
	builder.setPositiveButton(getString(R.string.allow), this);
	builder.setNegativeButton(getString(R.string.deny), this);
	}

	mDialog = builder.create();
	mDialog.show();

	if (getResources().getBoolean(R.bool.auto_confirm_bluetooth_activation_dialog) == true) {
	// dismiss dialog immediately if settings say so
	onClick(null, DialogInterface.BUTTON_POSITIVE);
	}
	}

	@Override
	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
	if (requestCode != REQUEST_CODE_START_BT) {
	Log.e(TAG, "Unexpected onActivityResult " + requestCode + ' ' + resultCode);
	setResult(RESULT_CANCELED);
	finish();
	return;
	}
	if (resultCode != RESULT_BT_STARTING_OR_STARTED) {
	setResult(resultCode);
	finish();
	return;
	}

	// Back from RequestPermissionHelperActivity. User confirmed to enable
	// BT and discoverable mode.
	mUserConfirmed = true;

	if (mLocalAdapter.getBluetoothState() == BluetoothAdapter.STATE_ON) {
	proceedAndFinish();
	} else {
	// If BT is not up yet, show "Turning on Bluetooth..."
	createDialog();
	}
	}

	public void onClick(DialogInterface dialog, int which) {
	switch (which) {
	case DialogInterface.BUTTON_POSITIVE:
	proceedAndFinish();
	break;

	case DialogInterface.BUTTON_NEGATIVE:
	setResult(RESULT_CANCELED);
	finish();
	break;
	}
	}

	private void proceedAndFinish() {
	int returnCode;

	if (mEnableOnly) {
	// BT enabled. Done
	returnCode = RESULT_OK;
	} else if (mLocalAdapter.setScanMode(
	BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE, mTimeout)) {
	// If already in discoverable mode, this will extend the timeout.
	long endTime = System.currentTimeMillis() + (long) mTimeout * 1000;
	LocalBluetoothPreferences.persistDiscoverableEndTimestamp(
	this, endTime);
	if (0 < mTimeout) {
	BluetoothDiscoverableTimeoutReceiver.setDiscoverableAlarm(this, endTime);
	}
	returnCode = mTimeout;
	// Activity.RESULT_FIRST_USER should be 1
	if (returnCode < RESULT_FIRST_USER) {
	returnCode = RESULT_FIRST_USER;
	}
	} else {
	returnCode = RESULT_CANCELED;
	}

	if (mDialog != null) {
	mDialog.dismiss();
	}

	setResult(returnCode);
	finish();
	}

	/**
	* Parse the received Intent and initialize mLocalBluetoothAdapter.
	* @return true if an error occurred; false otherwise
	*/
	private boolean parseIntent() {
	Intent intent = getIntent();
	if (intent != null && intent.getAction().equals(BluetoothAdapter.ACTION_REQUEST_ENABLE)) {
	mEnableOnly = true;
	} else if (intent != null
	&& intent.getAction().equals(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE)) {
	mTimeout = intent.getIntExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,
	BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT);

	Log.d(TAG, "Setting Bluetooth Discoverable Timeout = " + mTimeout);

	if (mTimeout < 0 \|\| mTimeout > MAX_DISCOVERABLE_TIMEOUT) {
	mTimeout = BluetoothDiscoverableEnabler.DEFAULT_DISCOVERABLE_TIMEOUT;
	}
	} else {
	Log.e(TAG, "Error: this activity may be started only with intent "
	+ BluetoothAdapter.ACTION_REQUEST_ENABLE + " or "
	+ BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
	setResult(RESULT_CANCELED);
	return true;
	}

	LocalBluetoothManager manager = LocalBluetoothManager.getInstance(this);
	if (manager == null) {
	Log.e(TAG, "Error: there's a problem starting Bluetooth");
	setResult(RESULT_CANCELED);
	return true;
	}
	mLocalAdapter = manager.getBluetoothAdapter();

	return false;
	}

	@Override
	protected void onDestroy() {
	super.onDestroy();
	if (mNeededToEnableBluetooth) {
	unregisterReceiver(mReceiver);
	}
	}

	@Override
	public void onBackPressed() {
	setResult(RESULT_CANCELED);
	super.onBackPressed();
	}
	}