src/com/android/browser/BrowserSnapshotPage.java - platform/packages/apps/Browser - Git at Google

 /*
  * Copyright (C) 2011 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.browser;

 import android.animation.Animator;
 import android.animation.Animator.AnimatorListener;
 import android.animation.AnimatorSet;
 import android.animation.ObjectAnimator;
 import android.app.Fragment;
 import android.app.LoaderManager.LoaderCallbacks;
 import android.content.ContentResolver;
 import android.content.ContentUris;
 import android.content.Context;
 import android.content.CursorLoader;
 import android.content.Loader;
 import android.database.Cursor;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
 import android.os.Bundle;
 import android.view.ContextMenu;
 import android.view.ContextMenu.ContextMenuInfo;
 import android.view.LayoutInflater;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.view.View.MeasureSpec;
 import android.view.ViewGroup;
 import android.widget.AdapterView;
 import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.GridView;
 import android.widget.ImageView;
 import android.widget.ResourceCursorAdapter;
 import android.widget.TextView;

 import com.android.browser.provider.SnapshotProvider.Snapshots;

 import java.text.DateFormat;
 import java.util.Date;

 public class BrowserSnapshotPage extends Fragment implements
         LoaderCallbacks<Cursor>, OnItemClickListener {

     public static final String EXTRA_ANIMATE_ID = "animate_id";

     private static final int LOADER_SNAPSHOTS = 1;
     private static final String[] PROJECTION = new String[] {
         Snapshots._ID,
         Snapshots.TITLE,
         Snapshots.VIEWSTATE_SIZE,
         Snapshots.THUMBNAIL,
         Snapshots.FAVICON,
         Snapshots.URL,
         Snapshots.DATE_CREATED,
     };
     private static final int SNAPSHOT_ID = 0;
     private static final int SNAPSHOT_TITLE = 1;
     private static final int SNAPSHOT_VIEWSTATE_SIZE = 2;
     private static final int SNAPSHOT_THUMBNAIL = 3;
     private static final int SNAPSHOT_FAVICON = 4;
     private static final int SNAPSHOT_URL = 5;
     private static final int SNAPSHOT_DATE_CREATED = 6;

     GridView mGrid;
     View mEmpty;
     SnapshotAdapter mAdapter;
     CombinedBookmarksCallbacks mCallback;
     long mAnimateId;

     @Override
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mCallback = (CombinedBookmarksCallbacks) getActivity();
         mAnimateId = getArguments().getLong(EXTRA_ANIMATE_ID);
     }

     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
             Bundle savedInstanceState) {
         View view = inflater.inflate(R.layout.snapshots, container, false);
         mEmpty = view.findViewById(android.R.id.empty);
         mGrid = (GridView) view.findViewById(R.id.grid);
         setupGrid(inflater);
         getLoaderManager().initLoader(LOADER_SNAPSHOTS, null, this);
         return view;
     }

     @Override
     public void onDestroyView() {
         super.onDestroyView();
         getLoaderManager().destroyLoader(LOADER_SNAPSHOTS);
         if (mAdapter != null) {
             mAdapter.changeCursor(null);
             mAdapter = null;
         }
     }

     void setupGrid(LayoutInflater inflater) {
         View item = inflater.inflate(R.layout.snapshot_item, mGrid, false);
         int mspec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
         item.measure(mspec, mspec);
         int width = item.getMeasuredWidth();
         mGrid.setColumnWidth(width);
         mGrid.setOnItemClickListener(this);
         mGrid.setOnCreateContextMenuListener(this);
     }

     @Override
     public Loader<Cursor> onCreateLoader(int id, Bundle args) {
         if (id == LOADER_SNAPSHOTS) {
             return new CursorLoader(getActivity(),
                     Snapshots.CONTENT_URI, PROJECTION,
                     null, null, Snapshots.DATE_CREATED + " DESC");
         }
         return null;
     }

     @Override
     public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
         if (loader.getId() == LOADER_SNAPSHOTS) {
             if (mAdapter == null) {
                 mAdapter = new SnapshotAdapter(getActivity(), data);
                 mGrid.setAdapter(mAdapter);
             } else {
                 mAdapter.changeCursor(data);
             }
             if (mAnimateId > 0) {
                 mAdapter.animateIn(mAnimateId);
                 mAnimateId = 0;
                 getArguments().remove(EXTRA_ANIMATE_ID);
             }
             boolean empty = mAdapter.isEmpty();
             mGrid.setVisibility(empty ? View.GONE : View.VISIBLE);
             mEmpty.setVisibility(empty ? View.VISIBLE : View.GONE);
         }
     }

     @Override
     public void onLoaderReset(Loader<Cursor> loader) {
     }

     @Override
     public void onCreateContextMenu(ContextMenu menu, View v,
             ContextMenuInfo menuInfo) {
         MenuInflater inflater = getActivity().getMenuInflater();
         inflater.inflate(R.menu.snapshots_context, menu);
         // Create the header, re-use BookmarkItem (has the layout we want)
         BookmarkItem header = new BookmarkItem(getActivity());
         header.setEnableScrolling(true);
         AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
         populateBookmarkItem(mAdapter.getItem(info.position), header);
         menu.setHeaderView(header);
     }

     private void populateBookmarkItem(Cursor cursor, BookmarkItem item) {
         item.setName(cursor.getString(SNAPSHOT_TITLE));
         item.setUrl(cursor.getString(SNAPSHOT_URL));
         item.setFavicon(getBitmap(cursor, SNAPSHOT_FAVICON));
     }

     static Bitmap getBitmap(Cursor cursor, int columnIndex) {
         byte[] data = cursor.getBlob(columnIndex);
         if (data == null) {
             return null;
         }
         return BitmapFactory.decodeByteArray(data, 0, data.length);
     }

     @Override
     public boolean onContextItemSelected(MenuItem item) {
         if (item.getItemId() == R.id.delete_context_menu_id) {
             AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
             deleteSnapshot(info.id);
             return true;
         }
         return super.onContextItemSelected(item);
     }

     void deleteSnapshot(long id) {
         final Uri uri = ContentUris.withAppendedId(Snapshots.CONTENT_URI, id);
         final ContentResolver cr = getActivity().getContentResolver();
         new Thread() {
             @Override
             public void run() {
                 cr.delete(uri, null, null);
             }
         }.start();

     }

     @Override
     public void onItemClick(AdapterView<?> parent, View view, int position,
             long id) {
         mCallback.openSnapshot(id);
     }

     private static class SnapshotAdapter extends ResourceCursorAdapter {
         private long mAnimateId;
         private AnimatorSet mAnimation;
         private View mAnimationTarget;

         public SnapshotAdapter(Context context, Cursor c) {
             super(context, R.layout.snapshot_item, c, 0);
             mAnimation = new AnimatorSet();
             mAnimation.playTogether(
                     ObjectAnimator.ofFloat(null, View.SCALE_X, 0f, 1f),
                     ObjectAnimator.ofFloat(null, View.SCALE_Y, 0f, 1f));
             mAnimation.setStartDelay(100);
             mAnimation.setDuration(400);
             mAnimation.addListener(new AnimatorListener() {

                 @Override
                 public void onAnimationStart(Animator animation) {
                 }

                 @Override
                 public void onAnimationRepeat(Animator animation) {
                 }

                 @Override
                 public void onAnimationEnd(Animator animation) {
                     mAnimateId = 0;
                     mAnimationTarget = null;
                 }

                 @Override
                 public void onAnimationCancel(Animator animation) {
                 }
             });
         }

         public void animateIn(long id) {
             mAnimateId = id;
         }

         @Override
         public void bindView(View view, Context context, Cursor cursor) {
             long id = cursor.getLong(SNAPSHOT_ID);
             if (id == mAnimateId) {
                 if (mAnimationTarget != view) {
                     float scale = 0f;
                     if (mAnimationTarget != null) {
                         scale = mAnimationTarget.getScaleX();
                         mAnimationTarget.setScaleX(1f);
                         mAnimationTarget.setScaleY(1f);
                     }
                     view.setScaleX(scale);
                     view.setScaleY(scale);
                 }
                 mAnimation.setTarget(view);
                 mAnimationTarget = view;
                 if (!mAnimation.isRunning()) {
                     mAnimation.start();
                 }

             }
             ImageView thumbnail = (ImageView) view.findViewById(R.id.thumb);
             byte[] thumbBlob = cursor.getBlob(SNAPSHOT_THUMBNAIL);
             if (thumbBlob == null) {
                 thumbnail.setImageResource(R.drawable.browser_thumbnail);
             } else {
                 Bitmap thumbBitmap = BitmapFactory.decodeByteArray(
                         thumbBlob, 0, thumbBlob.length);
                 thumbnail.setImageBitmap(thumbBitmap);
             }
             TextView title = (TextView) view.findViewById(R.id.title);
             title.setText(cursor.getString(SNAPSHOT_TITLE));
             TextView size = (TextView) view.findViewById(R.id.size);
             if (size != null) {
                 int stateLen = cursor.getInt(SNAPSHOT_VIEWSTATE_SIZE);
                 size.setText(String.format("%.2fMB", stateLen / 1024f / 1024f));
             }
             long timestamp = cursor.getLong(SNAPSHOT_DATE_CREATED);
             TextView date = (TextView) view.findViewById(R.id.date);
             DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.SHORT);
             date.setText(dateFormat.format(new Date(timestamp)));
         }

         @Override
         public Cursor getItem(int position) {
             return (Cursor) super.getItem(position);
         }
     }

 }
	/*
	* Copyright (C) 2011 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.browser;

	import android.animation.Animator;
	import android.animation.Animator.AnimatorListener;
	import android.animation.AnimatorSet;
	import android.animation.ObjectAnimator;
	import android.app.Fragment;
	import android.app.LoaderManager.LoaderCallbacks;
	import android.content.ContentResolver;
	import android.content.ContentUris;
	import android.content.Context;
	import android.content.CursorLoader;
	import android.content.Loader;
	import android.database.Cursor;
	import android.graphics.Bitmap;
	import android.graphics.BitmapFactory;
	import android.net.Uri;
	import android.os.Bundle;
	import android.view.ContextMenu;
	import android.view.ContextMenu.ContextMenuInfo;
	import android.view.LayoutInflater;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.view.View.MeasureSpec;
	import android.view.ViewGroup;
	import android.widget.AdapterView;
	import android.widget.AdapterView.AdapterContextMenuInfo;
	import android.widget.AdapterView.OnItemClickListener;
	import android.widget.GridView;
	import android.widget.ImageView;
	import android.widget.ResourceCursorAdapter;
	import android.widget.TextView;

	import com.android.browser.provider.SnapshotProvider.Snapshots;

	import java.text.DateFormat;
	import java.util.Date;

	public class BrowserSnapshotPage extends Fragment implements
	LoaderCallbacks<Cursor>, OnItemClickListener {

	public static final String EXTRA_ANIMATE_ID = "animate_id";

	private static final int LOADER_SNAPSHOTS = 1;
	private static final String[] PROJECTION = new String[] {
	Snapshots._ID,
	Snapshots.TITLE,
	Snapshots.VIEWSTATE_SIZE,
	Snapshots.THUMBNAIL,
	Snapshots.FAVICON,
	Snapshots.URL,
	Snapshots.DATE_CREATED,
	};
	private static final int SNAPSHOT_ID = 0;
	private static final int SNAPSHOT_TITLE = 1;
	private static final int SNAPSHOT_VIEWSTATE_SIZE = 2;
	private static final int SNAPSHOT_THUMBNAIL = 3;
	private static final int SNAPSHOT_FAVICON = 4;
	private static final int SNAPSHOT_URL = 5;
	private static final int SNAPSHOT_DATE_CREATED = 6;

	GridView mGrid;
	View mEmpty;
	SnapshotAdapter mAdapter;
	CombinedBookmarksCallbacks mCallback;
	long mAnimateId;

	@Override
	public void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	mCallback = (CombinedBookmarksCallbacks) getActivity();
	mAnimateId = getArguments().getLong(EXTRA_ANIMATE_ID);
	}

	@Override
	public View onCreateView(LayoutInflater inflater, ViewGroup container,
	Bundle savedInstanceState) {
	View view = inflater.inflate(R.layout.snapshots, container, false);
	mEmpty = view.findViewById(android.R.id.empty);
	mGrid = (GridView) view.findViewById(R.id.grid);
	setupGrid(inflater);
	getLoaderManager().initLoader(LOADER_SNAPSHOTS, null, this);
	return view;
	}

	@Override
	public void onDestroyView() {
	super.onDestroyView();
	getLoaderManager().destroyLoader(LOADER_SNAPSHOTS);
	if (mAdapter != null) {
	mAdapter.changeCursor(null);
	mAdapter = null;
	}
	}

	void setupGrid(LayoutInflater inflater) {
	View item = inflater.inflate(R.layout.snapshot_item, mGrid, false);
	int mspec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
	item.measure(mspec, mspec);
	int width = item.getMeasuredWidth();
	mGrid.setColumnWidth(width);
	mGrid.setOnItemClickListener(this);
	mGrid.setOnCreateContextMenuListener(this);
	}

	@Override
	public Loader<Cursor> onCreateLoader(int id, Bundle args) {
	if (id == LOADER_SNAPSHOTS) {
	return new CursorLoader(getActivity(),
	Snapshots.CONTENT_URI, PROJECTION,
	null, null, Snapshots.DATE_CREATED + " DESC");
	}
	return null;
	}

	@Override
	public void onLoadFinished(Loader<Cursor> loader, Cursor data) {
	if (loader.getId() == LOADER_SNAPSHOTS) {
	if (mAdapter == null) {
	mAdapter = new SnapshotAdapter(getActivity(), data);
	mGrid.setAdapter(mAdapter);
	} else {
	mAdapter.changeCursor(data);
	}
	if (mAnimateId > 0) {
	mAdapter.animateIn(mAnimateId);
	mAnimateId = 0;
	getArguments().remove(EXTRA_ANIMATE_ID);
	}
	boolean empty = mAdapter.isEmpty();
	mGrid.setVisibility(empty ? View.GONE : View.VISIBLE);
	mEmpty.setVisibility(empty ? View.VISIBLE : View.GONE);
	}
	}

	@Override
	public void onLoaderReset(Loader<Cursor> loader) {
	}

	@Override
	public void onCreateContextMenu(ContextMenu menu, View v,
	ContextMenuInfo menuInfo) {
	MenuInflater inflater = getActivity().getMenuInflater();
	inflater.inflate(R.menu.snapshots_context, menu);
	// Create the header, re-use BookmarkItem (has the layout we want)
	BookmarkItem header = new BookmarkItem(getActivity());
	header.setEnableScrolling(true);
	AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
	populateBookmarkItem(mAdapter.getItem(info.position), header);
	menu.setHeaderView(header);
	}

	private void populateBookmarkItem(Cursor cursor, BookmarkItem item) {
	item.setName(cursor.getString(SNAPSHOT_TITLE));
	item.setUrl(cursor.getString(SNAPSHOT_URL));
	item.setFavicon(getBitmap(cursor, SNAPSHOT_FAVICON));
	}

	static Bitmap getBitmap(Cursor cursor, int columnIndex) {
	byte[] data = cursor.getBlob(columnIndex);
	if (data == null) {
	return null;
	}
	return BitmapFactory.decodeByteArray(data, 0, data.length);
	}

	@Override
	public boolean onContextItemSelected(MenuItem item) {
	if (item.getItemId() == R.id.delete_context_menu_id) {
	AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
	deleteSnapshot(info.id);
	return true;
	}
	return super.onContextItemSelected(item);
	}

	void deleteSnapshot(long id) {
	final Uri uri = ContentUris.withAppendedId(Snapshots.CONTENT_URI, id);
	final ContentResolver cr = getActivity().getContentResolver();
	new Thread() {
	@Override
	public void run() {
	cr.delete(uri, null, null);
	}
	}.start();

	}

	@Override
	public void onItemClick(AdapterView<?> parent, View view, int position,
	long id) {
	mCallback.openSnapshot(id);
	}

	private static class SnapshotAdapter extends ResourceCursorAdapter {
	private long mAnimateId;
	private AnimatorSet mAnimation;
	private View mAnimationTarget;

	public SnapshotAdapter(Context context, Cursor c) {
	super(context, R.layout.snapshot_item, c, 0);
	mAnimation = new AnimatorSet();
	mAnimation.playTogether(
	ObjectAnimator.ofFloat(null, View.SCALE_X, 0f, 1f),
	ObjectAnimator.ofFloat(null, View.SCALE_Y, 0f, 1f));
	mAnimation.setStartDelay(100);
	mAnimation.setDuration(400);
	mAnimation.addListener(new AnimatorListener() {

	@Override
	public void onAnimationStart(Animator animation) {
	}

	@Override
	public void onAnimationRepeat(Animator animation) {
	}

	@Override
	public void onAnimationEnd(Animator animation) {
	mAnimateId = 0;
	mAnimationTarget = null;
	}

	@Override
	public void onAnimationCancel(Animator animation) {
	}
	});
	}

	public void animateIn(long id) {
	mAnimateId = id;
	}

	@Override
	public void bindView(View view, Context context, Cursor cursor) {
	long id = cursor.getLong(SNAPSHOT_ID);
	if (id == mAnimateId) {
	if (mAnimationTarget != view) {
	float scale = 0f;
	if (mAnimationTarget != null) {
	scale = mAnimationTarget.getScaleX();
	mAnimationTarget.setScaleX(1f);
	mAnimationTarget.setScaleY(1f);
	}
	view.setScaleX(scale);
	view.setScaleY(scale);
	}
	mAnimation.setTarget(view);
	mAnimationTarget = view;
	if (!mAnimation.isRunning()) {
	mAnimation.start();
	}

	}
	ImageView thumbnail = (ImageView) view.findViewById(R.id.thumb);
	byte[] thumbBlob = cursor.getBlob(SNAPSHOT_THUMBNAIL);
	if (thumbBlob == null) {
	thumbnail.setImageResource(R.drawable.browser_thumbnail);
	} else {
	Bitmap thumbBitmap = BitmapFactory.decodeByteArray(
	thumbBlob, 0, thumbBlob.length);
	thumbnail.setImageBitmap(thumbBitmap);
	}
	TextView title = (TextView) view.findViewById(R.id.title);
	title.setText(cursor.getString(SNAPSHOT_TITLE));
	TextView size = (TextView) view.findViewById(R.id.size);
	if (size != null) {
	int stateLen = cursor.getInt(SNAPSHOT_VIEWSTATE_SIZE);
	size.setText(String.format("%.2fMB", stateLen / 1024f / 1024f));
	}
	long timestamp = cursor.getLong(SNAPSHOT_DATE_CREATED);
	TextView date = (TextView) view.findViewById(R.id.date);
	DateFormat dateFormat = DateFormat.getDateInstance(DateFormat.SHORT);
	date.setText(dateFormat.format(new Date(timestamp)));
	}

	@Override
	public Cursor getItem(int position) {
	return (Cursor) super.getItem(position);
	}
	}

	}