packages/SystemUI/src/com/android/systemui/statusbar/tablet/RecentAppsPanel.java - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2010 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.systemui.statusbar.tablet;

 import java.util.ArrayList;
 import java.util.List;

 import android.app.ActivityManager;
 import android.app.IThumbnailReceiver;
 import android.app.ActivityManager.RunningTaskInfo;
 import android.content.Context;
 import android.content.Intent;
 import android.content.pm.ActivityInfo;
 import android.content.pm.PackageManager;
 import android.content.pm.ResolveInfo;
 import android.graphics.Bitmap;
 import android.graphics.Matrix;
 import android.graphics.drawable.Drawable;
 import android.os.RemoteException;
 import android.util.AttributeSet;
 import android.util.Log;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.ImageView;
 import android.widget.LinearLayout;
 import android.widget.TextView;

 import com.android.systemui.R;

 public class RecentAppsPanel extends LinearLayout implements StatusBarPanel, OnClickListener {
     private static final String TAG = "RecentAppsPanel";
     private static final boolean DEBUG = TabletStatusBarService.DEBUG;
     private static final int DISPLAY_TASKS = 4; // number of recent tasks to display
     private static final int MAX_TASKS = 2 * DISPLAY_TASKS; // give some slack for non-apps
     private static final boolean DBG = true;
     private TabletStatusBarService mBar;
     private TextView mNoRecents;
     private LinearLayout mRecentsContainer;
     private ArrayList<ActivityDescription> mActivityDescriptions;

     static class ActivityDescription {
         int id;
         Bitmap thumbnail; // generated by Activity.onCreateThumbnail()
         Drawable icon; // application package icon
         String label; // application package label
         CharSequence description; // generated by Activity.onCreateDescription()
         Intent intent; // launch intent for application
         Matrix matrix; // arbitrary rotation matrix to correct orientation
         int position; // position in list

         public ActivityDescription(Bitmap _thumbnail,
                 Drawable _icon, String _label, String _desc, Intent _intent, int _id, int _pos)
         {
             thumbnail = _thumbnail;
             icon = _icon;
             label = _label;
             description = _desc;
             intent = _intent;
             id = _id;
             position = _pos;
         }
     };

     private final IThumbnailReceiver mThumbnailReceiver = new IThumbnailReceiver.Stub() {

         public void finished() throws RemoteException {
         }

         public void newThumbnail(final int id, final Bitmap bitmap, CharSequence description)
                 throws RemoteException {
             ActivityDescription info = findActivityDescription(id);
             if (info != null) {
                 info.thumbnail = bitmap;
                 info.description = description;
             }
         }
     };

     public boolean isInContentArea(int x, int y) {
         final int l = getPaddingLeft();
         final int r = getWidth() - getPaddingRight();
         final int t = getPaddingTop();
         final int b = getHeight() - getPaddingBottom();
         return x >= l && x < r && y >= t && y < b;
     }

     public void setBar(TabletStatusBarService bar) {
         mBar = bar;
     }

     public RecentAppsPanel(Context context, AttributeSet attrs) {
         this(context, attrs, 0);
     }

     public RecentAppsPanel(Context context, AttributeSet attrs, int defStyle) {
         super(context, attrs, defStyle);
     }

     @Override
     protected void onFinishInflate() {
         super.onFinishInflate();
         mNoRecents = (TextView) findViewById(R.id.recents_no_recents);
         mRecentsContainer = (LinearLayout) findViewById(R.id.recents_container);
     }

     @Override
     protected void onVisibilityChanged(View changedView, int visibility) {
         super.onVisibilityChanged(changedView, visibility);
         Log.v(TAG, "onVisibilityChanged(" + changedView + ", " + visibility + ")");
         if (visibility == View.VISIBLE && changedView == this) {
             refreshApplicationList();
             mRecentsContainer.setScrollbarFadingEnabled(true);
             mRecentsContainer.scrollTo(0, 0);
         }
     }

     private ArrayList<ActivityDescription> getRecentTasks() {
         ArrayList<ActivityDescription> activityDescriptions = new ArrayList<ActivityDescription>();
         final PackageManager pm = mContext.getPackageManager();
         final ActivityManager am = (ActivityManager)
                 mContext.getSystemService(Context.ACTIVITY_SERVICE);

         final List<ActivityManager.RecentTaskInfo> recentTasks =
                 am.getRecentTasks(MAX_TASKS, ActivityManager.RECENT_IGNORE_UNAVAILABLE);

         ActivityInfo homeInfo = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME)
                     .resolveActivityInfo(pm, 0);

         int numTasks = recentTasks.size();
         for (int i = 0, index = 0; i < numTasks && (index < MAX_TASKS); ++i) {
             final ActivityManager.RecentTaskInfo recentInfo = recentTasks.get(i);

             Intent intent = new Intent(recentInfo.baseIntent);
             if (recentInfo.origActivity != null) {
                 intent.setComponent(recentInfo.origActivity);
             }

             // Skip the current home activity.
             if (homeInfo != null
                     && homeInfo.packageName.equals(intent.getComponent().getPackageName())
                     && homeInfo.name.equals(intent.getComponent().getClassName())) {
                 continue;
             }

             intent.setFlags((intent.getFlags()&~Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
                     | Intent.FLAG_ACTIVITY_NEW_TASK);
             final ResolveInfo resolveInfo = pm.resolveActivity(intent, 0);
             if (resolveInfo != null) {
                 final ActivityInfo info = resolveInfo.activityInfo;
                 final String title = info.loadLabel(pm).toString();
                 Drawable icon = info.loadIcon(pm);
                 int id = recentTasks.get(i).id;
                 if (title != null && title.length() > 0 && icon != null) {
                     Log.v(TAG, "creating activity desc for id=" + id + ", label=" + title);
                     ActivityDescription item = new ActivityDescription(
                             null, icon, title, null, intent, id, index);
                     activityDescriptions.add(item);
                     ++index;
                 } else {
                     if (DBG) Log.v(TAG, "SKIPPING item " + id);
                 }
             }
         }
         return activityDescriptions;
     }

     ActivityDescription findActivityDescription(int id)
     {
         ActivityDescription desc = null;
         for (int i = 0; i < mActivityDescriptions.size(); i++) {
             ActivityDescription item = mActivityDescriptions.get(i);
             if (item != null && item.id == id) {
                 desc = item;
                 break;
             }
         }
         return desc;
     }

     private void getThumbnails(ArrayList<ActivityDescription> tasks) {
         ActivityManager am = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);
         List<RunningTaskInfo> runningTasks = am.getRunningTasks(MAX_TASKS, 0, mThumbnailReceiver);
         for (RunningTaskInfo r : runningTasks) {
             // Find the activity description associted with the given id
             ActivityDescription desc = findActivityDescription(r.id);
             if (desc != null) {
                 if (r.thumbnail != null) {
                     desc.thumbnail = r.thumbnail;
                     desc.description = r.description;
                 } else {
                     if (DBG) Log.v(TAG, "*** RUNNING THUMBNAIL WAS NULL ***");
                 }
             } else {
                 if (DBG) Log.v(TAG, "Couldn't find ActivityDesc for id=" + r.id);
             }
         }
     }

     private void refreshApplicationList() {
         mActivityDescriptions = getRecentTasks();
         getThumbnails(mActivityDescriptions);
         updateUiElements();
     }

     private void updateUiElements() {
         mRecentsContainer.removeAllViews();
         final int first = 0;
         final int last = Math.min(mActivityDescriptions.size(), DISPLAY_TASKS) - 1;
         for (int i = last; i >= first; i--) {
             ActivityDescription activityDescription = mActivityDescriptions.get(i);
             View view = View.inflate(mContext, R.layout.sysbar_panel_recent_item, null);
             ImageView appThumbnail = (ImageView) view.findViewById(R.id.app_thumbnail);
             ImageView appIcon = (ImageView) view.findViewById(R.id.app_icon);
             TextView appDescription = (TextView) view.findViewById(R.id.app_label);
             if (activityDescription.thumbnail != null) {
                 Log.v(TAG, "thumbnail res = " + activityDescription.thumbnail.getWidth()
                         + "x" + activityDescription.thumbnail.getHeight());
             } else {
                 Log.v(TAG, "thumbnail for " + activityDescription.label + " was null");
             }
             appThumbnail.setImageBitmap(activityDescription.thumbnail);
             appIcon.setImageDrawable(activityDescription.icon);
             appDescription.setText(activityDescription.label);
             view.setOnClickListener(this);
             view.setTag(activityDescription.intent);
             Log.v(TAG, "Adding task: " + activityDescription.label);
             mRecentsContainer.addView(view);
         }

         int views = mRecentsContainer.getChildCount();
         mNoRecents.setVisibility(views == 0 ? View.VISIBLE : View.GONE);
         mRecentsContainer.setVisibility(views > 0 ? View.VISIBLE : View.GONE);
     }

     public void onClick(View v) {
         Intent intent = (Intent) v.getTag();
         if (DEBUG) Log.v(TAG, "Starting activity " + intent);
         getContext().startActivity(intent);
         mBar.animateCollapse();
     }
 }
	/*
	* Copyright (C) 2010 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.systemui.statusbar.tablet;

	import java.util.ArrayList;
	import java.util.List;

	import android.app.ActivityManager;
	import android.app.IThumbnailReceiver;
	import android.app.ActivityManager.RunningTaskInfo;
	import android.content.Context;
	import android.content.Intent;
	import android.content.pm.ActivityInfo;
	import android.content.pm.PackageManager;
	import android.content.pm.ResolveInfo;
	import android.graphics.Bitmap;
	import android.graphics.Matrix;
	import android.graphics.drawable.Drawable;
	import android.os.RemoteException;
	import android.util.AttributeSet;
	import android.util.Log;
	import android.view.View;
	import android.view.View.OnClickListener;
	import android.widget.ImageView;
	import android.widget.LinearLayout;
	import android.widget.TextView;

	import com.android.systemui.R;

	public class RecentAppsPanel extends LinearLayout implements StatusBarPanel, OnClickListener {
	private static final String TAG = "RecentAppsPanel";
	private static final boolean DEBUG = TabletStatusBarService.DEBUG;
	private static final int DISPLAY_TASKS = 4; // number of recent tasks to display
	private static final int MAX_TASKS = 2 * DISPLAY_TASKS; // give some slack for non-apps
	private static final boolean DBG = true;
	private TabletStatusBarService mBar;
	private TextView mNoRecents;
	private LinearLayout mRecentsContainer;
	private ArrayList<ActivityDescription> mActivityDescriptions;

	static class ActivityDescription {
	int id;
	Bitmap thumbnail; // generated by Activity.onCreateThumbnail()
	Drawable icon; // application package icon
	String label; // application package label
	CharSequence description; // generated by Activity.onCreateDescription()
	Intent intent; // launch intent for application
	Matrix matrix; // arbitrary rotation matrix to correct orientation
	int position; // position in list

	public ActivityDescription(Bitmap _thumbnail,
	Drawable _icon, String _label, String _desc, Intent _intent, int _id, int _pos)
	{
	thumbnail = _thumbnail;
	icon = _icon;
	label = _label;
	description = _desc;
	intent = _intent;
	id = _id;
	position = _pos;
	}
	};

	private final IThumbnailReceiver mThumbnailReceiver = new IThumbnailReceiver.Stub() {

	public void finished() throws RemoteException {
	}

	public void newThumbnail(final int id, final Bitmap bitmap, CharSequence description)
	throws RemoteException {
	ActivityDescription info = findActivityDescription(id);
	if (info != null) {
	info.thumbnail = bitmap;
	info.description = description;
	}
	}
	};

	public boolean isInContentArea(int x, int y) {
	final int l = getPaddingLeft();
	final int r = getWidth() - getPaddingRight();
	final int t = getPaddingTop();
	final int b = getHeight() - getPaddingBottom();
	return x >= l && x < r && y >= t && y < b;
	}

	public void setBar(TabletStatusBarService bar) {
	mBar = bar;
	}

	public RecentAppsPanel(Context context, AttributeSet attrs) {
	this(context, attrs, 0);
	}

	public RecentAppsPanel(Context context, AttributeSet attrs, int defStyle) {
	super(context, attrs, defStyle);
	}

	@Override
	protected void onFinishInflate() {
	super.onFinishInflate();
	mNoRecents = (TextView) findViewById(R.id.recents_no_recents);
	mRecentsContainer = (LinearLayout) findViewById(R.id.recents_container);
	}

	@Override
	protected void onVisibilityChanged(View changedView, int visibility) {
	super.onVisibilityChanged(changedView, visibility);
	Log.v(TAG, "onVisibilityChanged(" + changedView + ", " + visibility + ")");
	if (visibility == View.VISIBLE && changedView == this) {
	refreshApplicationList();
	mRecentsContainer.setScrollbarFadingEnabled(true);
	mRecentsContainer.scrollTo(0, 0);
	}
	}

	private ArrayList<ActivityDescription> getRecentTasks() {
	ArrayList<ActivityDescription> activityDescriptions = new ArrayList<ActivityDescription>();
	final PackageManager pm = mContext.getPackageManager();
	final ActivityManager am = (ActivityManager)
	mContext.getSystemService(Context.ACTIVITY_SERVICE);

	final List<ActivityManager.RecentTaskInfo> recentTasks =
	am.getRecentTasks(MAX_TASKS, ActivityManager.RECENT_IGNORE_UNAVAILABLE);

	ActivityInfo homeInfo = new Intent(Intent.ACTION_MAIN).addCategory(Intent.CATEGORY_HOME)
	.resolveActivityInfo(pm, 0);

	int numTasks = recentTasks.size();
	for (int i = 0, index = 0; i < numTasks && (index < MAX_TASKS); ++i) {
	final ActivityManager.RecentTaskInfo recentInfo = recentTasks.get(i);

	Intent intent = new Intent(recentInfo.baseIntent);
	if (recentInfo.origActivity != null) {
	intent.setComponent(recentInfo.origActivity);
	}

	// Skip the current home activity.
	if (homeInfo != null
	&& homeInfo.packageName.equals(intent.getComponent().getPackageName())
	&& homeInfo.name.equals(intent.getComponent().getClassName())) {
	continue;
	}

	intent.setFlags((intent.getFlags()&~Intent.FLAG_ACTIVITY_RESET_TASK_IF_NEEDED)
	\| Intent.FLAG_ACTIVITY_NEW_TASK);
	final ResolveInfo resolveInfo = pm.resolveActivity(intent, 0);
	if (resolveInfo != null) {
	final ActivityInfo info = resolveInfo.activityInfo;
	final String title = info.loadLabel(pm).toString();
	Drawable icon = info.loadIcon(pm);
	int id = recentTasks.get(i).id;
	if (title != null && title.length() > 0 && icon != null) {
	Log.v(TAG, "creating activity desc for id=" + id + ", label=" + title);
	ActivityDescription item = new ActivityDescription(
	null, icon, title, null, intent, id, index);
	activityDescriptions.add(item);
	++index;
	} else {
	if (DBG) Log.v(TAG, "SKIPPING item " + id);
	}
	}
	}
	return activityDescriptions;
	}

	ActivityDescription findActivityDescription(int id)
	{
	ActivityDescription desc = null;
	for (int i = 0; i < mActivityDescriptions.size(); i++) {
	ActivityDescription item = mActivityDescriptions.get(i);
	if (item != null && item.id == id) {
	desc = item;
	break;
	}
	}
	return desc;
	}

	private void getThumbnails(ArrayList<ActivityDescription> tasks) {
	ActivityManager am = (ActivityManager) mContext.getSystemService(Context.ACTIVITY_SERVICE);
	List<RunningTaskInfo> runningTasks = am.getRunningTasks(MAX_TASKS, 0, mThumbnailReceiver);
	for (RunningTaskInfo r : runningTasks) {
	// Find the activity description associted with the given id
	ActivityDescription desc = findActivityDescription(r.id);
	if (desc != null) {
	if (r.thumbnail != null) {
	desc.thumbnail = r.thumbnail;
	desc.description = r.description;
	} else {
	if (DBG) Log.v(TAG, "* RUNNING THUMBNAIL WAS NULL *");
	}
	} else {
	if (DBG) Log.v(TAG, "Couldn't find ActivityDesc for id=" + r.id);
	}
	}
	}

	private void refreshApplicationList() {
	mActivityDescriptions = getRecentTasks();
	getThumbnails(mActivityDescriptions);
	updateUiElements();
	}

	private void updateUiElements() {
	mRecentsContainer.removeAllViews();
	final int first = 0;
	final int last = Math.min(mActivityDescriptions.size(), DISPLAY_TASKS) - 1;
	for (int i = last; i >= first; i--) {
	ActivityDescription activityDescription = mActivityDescriptions.get(i);
	View view = View.inflate(mContext, R.layout.sysbar_panel_recent_item, null);
	ImageView appThumbnail = (ImageView) view.findViewById(R.id.app_thumbnail);
	ImageView appIcon = (ImageView) view.findViewById(R.id.app_icon);
	TextView appDescription = (TextView) view.findViewById(R.id.app_label);
	if (activityDescription.thumbnail != null) {
	Log.v(TAG, "thumbnail res = " + activityDescription.thumbnail.getWidth()
	+ "x" + activityDescription.thumbnail.getHeight());
	} else {
	Log.v(TAG, "thumbnail for " + activityDescription.label + " was null");
	}
	appThumbnail.setImageBitmap(activityDescription.thumbnail);
	appIcon.setImageDrawable(activityDescription.icon);
	appDescription.setText(activityDescription.label);
	view.setOnClickListener(this);
	view.setTag(activityDescription.intent);
	Log.v(TAG, "Adding task: " + activityDescription.label);
	mRecentsContainer.addView(view);
	}

	int views = mRecentsContainer.getChildCount();
	mNoRecents.setVisibility(views == 0 ? View.VISIBLE : View.GONE);
	mRecentsContainer.setVisibility(views > 0 ? View.VISIBLE : View.GONE);
	}

	public void onClick(View v) {
	Intent intent = (Intent) v.getTag();
	if (DEBUG) Log.v(TAG, "Starting activity " + intent);
	getContext().startActivity(intent);
	mBar.animateCollapse();
	}
	}