/*
* 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.android.settings;
import android.app.Activity;
import android.app.ActivityManager;
import android.app.LauncherActivity.IconResizer;
import android.appwidget.AppWidgetHost;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProviderInfo;
import android.content.ActivityNotFoundException;
import android.content.ComponentName;
import android.content.Context;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.Rect;
import android.graphics.drawable.Drawable;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.IBinder;
import android.os.RemoteException;
import android.os.ServiceManager;
import android.util.DisplayMetrics;
import android.util.Log;
import android.view.IWindowManager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.AdapterView;
import android.widget.BaseAdapter;
import android.widget.GridView;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import com.android.internal.widget.LockPatternUtils;
import java.lang.ref.WeakReference;
import java.util.List;
/**
* Displays a list of {@link AppWidgetProviderInfo} widgets, along with any
* injected special widgets specified through
* {@link AppWidgetManager#EXTRA_CUSTOM_INFO} and
* {@link AppWidgetManager#EXTRA_CUSTOM_EXTRAS}.
* <p>
* When an installed {@link AppWidgetProviderInfo} is selected, this activity
* will bind it to the given {@link AppWidgetManager#EXTRA_APPWIDGET_ID},
* otherwise it will return the requested extras.
*/
public class KeyguardAppWidgetPickActivity extends Activity
implements GridView.OnItemClickListener,
AppWidgetLoader.ItemConstructor<KeyguardAppWidgetPickActivity.Item> {
private static final String TAG = "KeyguardAppWidgetPickActivity";
private static final int REQUEST_PICK_APPWIDGET = 126;
private static final int REQUEST_CREATE_APPWIDGET = 127;
private AppWidgetLoader<Item> mAppWidgetLoader;
private List<Item> mItems;
private GridView mGridView;
private AppWidgetAdapter mAppWidgetAdapter;
private AppWidgetManager mAppWidgetManager;
private int mAppWidgetId;
// Might make it possible to make this be false in future
private boolean mAddingToKeyguard = true;
private Intent mResultData;
private LockPatternUtils mLockPatternUtils;
private Bundle mExtraConfigureOptions;
@Override
protected void onCreate(Bundle savedInstanceState) {
setContentView(R.layout.keyguard_appwidget_picker_layout);
super.onCreate(savedInstanceState);
// Set default return data
setResultData(RESULT_CANCELED, null);
// Read the appWidgetId passed our direction, otherwise bail if not found
final Intent intent = getIntent();
if (intent.hasExtra(AppWidgetManager.EXTRA_APPWIDGET_ID)) {
mAppWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID);
} else {
finish();
}
mExtraConfigureOptions = intent.getBundleExtra(AppWidgetManager.EXTRA_APPWIDGET_OPTIONS);
mGridView = (GridView) findViewById(R.id.widget_list);
DisplayMetrics dm = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(dm);
int maxGridWidth = getResources().getDimensionPixelSize(
R.dimen.keyguard_appwidget_picker_max_width);
if (maxGridWidth < dm.widthPixels) {
mGridView.getLayoutParams().width = maxGridWidth;
}
mAppWidgetManager = AppWidgetManager.getInstance(this);
mAppWidgetLoader = new AppWidgetLoader<Item>(this, mAppWidgetManager, this);
mItems = mAppWidgetLoader.getItems(getIntent());
mAppWidgetAdapter = new AppWidgetAdapter(this, mItems);
mGridView.setAdapter(mAppWidgetAdapter);
mGridView.setOnItemClickListener(this);
mLockPatternUtils = new LockPatternUtils(this); // TEMP-- we want to delete this
}
/**
* Convenience method for setting the result code and intent. This method
* correctly injects the {@link AppWidgetManager#EXTRA_APPWIDGET_ID} that
* most hosts expect returned.
*/
void setResultData(int code, Intent intent) {
Intent result = intent != null ? intent : new Intent();
result.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
mResultData = result;
setResult(code, result);
}
/**
* Item that appears in the AppWidget picker grid.
*/
public static class Item implements AppWidgetLoader.LabelledItem {
protected static IconResizer sResizer;
CharSequence label;
int appWidgetPreviewId;
int iconId;
String packageName;
String className;
Bundle extras;
private WidgetPreviewLoader mWidgetPreviewLoader;
private Context mContext;
/**
* Create a list item from given label and icon.
*/
Item(Context context, CharSequence label) {
this.label = label;
mContext = context;
}
void loadWidgetPreview(ImageView v) {
mWidgetPreviewLoader = new WidgetPreviewLoader(mContext, v);
mWidgetPreviewLoader.executeOnExecutor(AsyncTask.SERIAL_EXECUTOR, (Void[]) null);
}
void cancelLoadingWidgetPreview() {
if (mWidgetPreviewLoader != null) {
mWidgetPreviewLoader.cancel(false);
mWidgetPreviewLoader = null;
}
}
/**
* Build the {@link Intent} described by this item. If this item
* can't create a valid {@link android.content.ComponentName}, it will return
* {@link Intent#ACTION_CREATE_SHORTCUT} filled with the item label.
*/
Intent getIntent() {
Intent intent = new Intent();
if (packageName != null && className != null) {
// Valid package and class, so fill details as normal intent
intent.setClassName(packageName, className);
if (extras != null) {
intent.putExtras(extras);
}
} else {
// No valid package or class, so treat as shortcut with label
intent.setAction(Intent.ACTION_CREATE_SHORTCUT);
intent.putExtra(Intent.EXTRA_SHORTCUT_NAME, label);
}
return intent;
}
public CharSequence getLabel() {
return label;
}
class WidgetPreviewLoader extends AsyncTask<Void, Bitmap, Void> {
private Resources mResources;
private PackageManager mPackageManager;
private int mIconDpi;
private ImageView mView;
public WidgetPreviewLoader(Context context, ImageView v) {
super();
mResources = context.getResources();
mPackageManager = context.getPackageManager();
ActivityManager activityManager =
(ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
mIconDpi = activityManager.getLauncherLargeIconDensity();
mView = v;
}
public Void doInBackground(Void... params) {
if (!isCancelled()) {
int appWidgetPreviewWidth =
mResources.getDimensionPixelSize(R.dimen.appwidget_preview_width);
int appWidgetPreviewHeight =
mResources.getDimensionPixelSize(R.dimen.appwidget_preview_height);
Bitmap b = getWidgetPreview(new ComponentName(packageName, className),
appWidgetPreviewId, iconId,
appWidgetPreviewWidth, appWidgetPreviewHeight);
publishProgress(b);
}
return null;
}
public void onProgressUpdate(Bitmap... values) {
if (!isCancelled()) {
Bitmap b = values[0];
mView.setImageBitmap(b);
}
}
abstract class WeakReferenceThreadLocal<T> {
private ThreadLocal<WeakReference<T>> mThreadLocal;
public WeakReferenceThreadLocal() {
mThreadLocal = new ThreadLocal<WeakReference<T>>();
}
abstract T initialValue();
public void set(T t) {
mThreadLocal.set(new WeakReference<T>(t));
}
public T get() {
WeakReference<T> reference = mThreadLocal.get();
T obj;
if (reference == null) {
obj = initialValue();
mThreadLocal.set(new WeakReference<T>(obj));
return obj;
} else {
obj = reference.get();
if (obj == null) {
obj = initialValue();
mThreadLocal.set(new WeakReference<T>(obj));
}
return obj;
}
}
}
class CanvasCache extends WeakReferenceThreadLocal<Canvas> {
@Override
protected Canvas initialValue() {
return new Canvas();
}
}
class PaintCache extends WeakReferenceThreadLocal<Paint> {
@Override
protected Paint initialValue() {
return null;
}
}
class BitmapCache extends WeakReferenceThreadLocal<Bitmap> {
@Override
protected Bitmap initialValue() {
return null;
}
}
class RectCache extends WeakReferenceThreadLocal<Rect> {
@Override
protected Rect initialValue() {
return new Rect();
}
}
// Used for drawing widget previews
CanvasCache sCachedAppWidgetPreviewCanvas = new CanvasCache();
RectCache sCachedAppWidgetPreviewSrcRect = new RectCache();
RectCache sCachedAppWidgetPreviewDestRect = new RectCache();
PaintCache sCachedAppWidgetPreviewPaint = new PaintCache();
private Bitmap getWidgetPreview(ComponentName provider, int previewImage,
int iconId, int maxWidth, int maxHeight) {
// Load the preview image if possible
String packageName = provider.getPackageName();
if (maxWidth < 0) maxWidth = Integer.MAX_VALUE;
if (maxHeight < 0) maxHeight = Integer.MAX_VALUE;
int appIconSize = mResources.getDimensionPixelSize(R.dimen.app_icon_size);
Drawable drawable = null;
if (previewImage != 0) {
drawable = mPackageManager.getDrawable(packageName, previewImage, null);
if (drawable == null) {
Log.w(TAG, "Can't load widget preview drawable 0x" +
Integer.toHexString(previewImage) + " for provider: " + provider);
}
}
int bitmapWidth;
int bitmapHeight;
Bitmap defaultPreview = null;
boolean widgetPreviewExists = (drawable != null);
if (widgetPreviewExists) {
bitmapWidth = drawable.getIntrinsicWidth();
bitmapHeight = drawable.getIntrinsicHeight();
} else {
// Generate a preview image if we couldn't load one
bitmapWidth = appIconSize;
bitmapHeight = appIconSize;
defaultPreview = Bitmap.createBitmap(bitmapWidth, bitmapHeight,
Config.ARGB_8888);
try {
Drawable icon = null;
if (iconId > 0)
icon = getFullResIcon(packageName, iconId);
if (icon != null) {
renderDrawableToBitmap(icon, defaultPreview, 0,
0, appIconSize, appIconSize);
}
} catch (Resources.NotFoundException e) {
}
}
// Scale to fit width only - let the widget preview be clipped in the
// vertical dimension
float scale = 1f;
if (bitmapWidth > maxWidth) {
scale = maxWidth / (float) bitmapWidth;
}
int finalPreviewWidth = (int) (scale * bitmapWidth);
int finalPreviewHeight = (int) (scale * bitmapHeight);
bitmapWidth = finalPreviewWidth;
bitmapHeight = Math.min(finalPreviewHeight, maxHeight);
Bitmap preview = Bitmap.createBitmap(bitmapWidth, bitmapHeight,
Config.ARGB_8888);
// Draw the scaled preview into the final bitmap
if (widgetPreviewExists) {
renderDrawableToBitmap(drawable, preview, 0, 0, finalPreviewWidth,
finalPreviewHeight);
} else {
final Canvas c = sCachedAppWidgetPreviewCanvas.get();
final Rect src = sCachedAppWidgetPreviewSrcRect.get();
final Rect dest = sCachedAppWidgetPreviewDestRect.get();
c.setBitmap(preview);
src.set(0, 0, defaultPreview.getWidth(), defaultPreview.getHeight());
dest.set(0, 0, finalPreviewWidth, finalPreviewHeight);
Paint p = sCachedAppWidgetPreviewPaint.get();
if (p == null) {
p = new Paint();
p.setFilterBitmap(true);
sCachedAppWidgetPreviewPaint.set(p);
}
c.drawBitmap(defaultPreview, src, dest, p);
c.setBitmap(null);
}
return preview;
}
public Drawable getFullResDefaultActivityIcon() {
return getFullResIcon(Resources.getSystem(),
android.R.mipmap.sym_def_app_icon);
}
public Drawable getFullResIcon(Resources resources, int iconId) {
Drawable d;
try {
d = resources.getDrawableForDensity(iconId, mIconDpi);
} catch (Resources.NotFoundException e) {
d = null;
}
return (d != null) ? d : getFullResDefaultActivityIcon();
}
public Drawable getFullResIcon(String packageName, int iconId) {
Resources resources;
try {
resources = mPackageManager.getResourcesForApplication(packageName);
} catch (PackageManager.NameNotFoundException e) {
resources = null;
}
if (resources != null) {
if (iconId != 0) {
return getFullResIcon(resources, iconId);
}
}
return getFullResDefaultActivityIcon();
}
private void renderDrawableToBitmap(Drawable d, Bitmap bitmap, int x, int y, int w, int h) {
renderDrawableToBitmap(d, bitmap, x, y, w, h, 1f);
}
private void renderDrawableToBitmap(Drawable d, Bitmap bitmap, int x, int y, int w, int h,
float scale) {
if (bitmap != null) {
Canvas c = new Canvas(bitmap);
c.scale(scale, scale);
Rect oldBounds = d.copyBounds();
d.setBounds(x, y, x + w, y + h);
d.draw(c);
d.setBounds(oldBounds); // Restore the bounds
c.setBitmap(null);
}
}
}
}
@Override
public Item createItem(Context context, AppWidgetProviderInfo info, Bundle extras) {
CharSequence label = info.label;
Item item = new Item(context, label);
item.appWidgetPreviewId = info.previewImage;
item.iconId = info.icon;
item.packageName = info.provider.getPackageName();
item.className = info.provider.getClassName();
item.extras = extras;
return item;
}
protected static class AppWidgetAdapter extends BaseAdapter {
private final LayoutInflater mInflater;
private final List<Item> mItems;
/**
* Create an adapter for the given items.
*/
public AppWidgetAdapter(Context context, List<Item> items) {
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
mItems = items;
}
/**
* {@inheritDoc}
*/
public int getCount() {
return mItems.size();
}
/**
* {@inheritDoc}
*/
public Object getItem(int position) {
return mItems.get(position);
}
/**
* {@inheritDoc}
*/
public long getItemId(int position) {
return position;
}
/**
* {@inheritDoc}
*/
public View getView(int position, View convertView, ViewGroup parent) {
if (convertView == null) {
convertView = mInflater.inflate(R.layout.keyguard_appwidget_item, parent, false);
}
Item item = (Item) getItem(position);
TextView textView = (TextView) convertView.findViewById(R.id.label);
textView.setText(item.label);
ImageView iconView = (ImageView) convertView.findViewById(R.id.icon);
iconView.setImageDrawable(null);
item.loadWidgetPreview(iconView);
return convertView;
}
public void cancelAllWidgetPreviewLoaders() {
for (int i = 0; i < mItems.size(); i++) {
mItems.get(i).cancelLoadingWidgetPreview();
}
}
}
/**
* {@inheritDoc}
*/
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
Item item = mItems.get(position);
Intent intent = item.getIntent();
int result;
if (item.extras != null) {
// If these extras are present it's because this entry is custom.
// Don't try to bind it, just pass it back to the app.
result = RESULT_OK;
setResultData(result, intent);
} else {
try {
if (mAddingToKeyguard && mAppWidgetId == AppWidgetManager.INVALID_APPWIDGET_ID) {
// Found in KeyguardHostView.java
final int KEYGUARD_HOST_ID = 0x4B455947;
mAppWidgetId = AppWidgetHost.allocateAppWidgetIdForSystem(KEYGUARD_HOST_ID);
}
mAppWidgetManager.bindAppWidgetId(
mAppWidgetId, intent.getComponent(), mExtraConfigureOptions);
result = RESULT_OK;
} catch (IllegalArgumentException e) {
// This is thrown if they're already bound, or otherwise somehow
// bogus. Set the result to canceled, and exit. The app *should*
// clean up at this point. We could pass the error along, but
// it's not clear that that's useful -- the widget will simply not
// appear.
result = RESULT_CANCELED;
}
setResultData(result, null);
}
if (mAddingToKeyguard) {
onActivityResult(REQUEST_PICK_APPWIDGET, result, mResultData);
} else {
finish();
}
}
protected void onDestroy() {
if (mAppWidgetAdapter != null) {
mAppWidgetAdapter.cancelAllWidgetPreviewLoaders();
}
super.onDestroy();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_PICK_APPWIDGET || requestCode == REQUEST_CREATE_APPWIDGET) {
int appWidgetId;
if (data == null) {
appWidgetId = AppWidgetManager.INVALID_APPWIDGET_ID ;
} else {
appWidgetId = data.getIntExtra(
AppWidgetManager.EXTRA_APPWIDGET_ID, AppWidgetManager.INVALID_APPWIDGET_ID);
}
if (requestCode == REQUEST_PICK_APPWIDGET && resultCode == Activity.RESULT_OK) {
AppWidgetManager appWidgetManager = AppWidgetManager.getInstance(this);
AppWidgetProviderInfo appWidget = null;
appWidget = appWidgetManager.getAppWidgetInfo(appWidgetId);
if (appWidget.configure != null) {
// Launch over to configure widget, if needed
Intent intent = new Intent(AppWidgetManager.ACTION_APPWIDGET_CONFIGURE);
intent.setComponent(appWidget.configure);
intent.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
intent.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, appWidgetId);
startActivityForResultSafely(intent, REQUEST_CREATE_APPWIDGET);
} else {
// Otherwise just add it
onActivityResult(REQUEST_CREATE_APPWIDGET, Activity.RESULT_OK, data);
}
} else if (requestCode == REQUEST_CREATE_APPWIDGET && resultCode == Activity.RESULT_OK) {
mLockPatternUtils.addAppWidget(appWidgetId, 0);
finishDelayedAndShowLockScreen(appWidgetId);
} else {
if (mAddingToKeyguard &&
mAppWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
AppWidgetHost.deleteAppWidgetIdForSystem(mAppWidgetId);
}
finishDelayedAndShowLockScreen(AppWidgetManager.INVALID_APPWIDGET_ID);
}
}
}
private void finishDelayedAndShowLockScreen(int appWidgetId) {
IBinder b = ServiceManager.getService(Context.WINDOW_SERVICE);
IWindowManager iWm = IWindowManager.Stub.asInterface(b);
Bundle opts = null;
if (appWidgetId != AppWidgetManager.INVALID_APPWIDGET_ID) {
opts = new Bundle();
opts.putInt(LockPatternUtils.KEYGUARD_SHOW_APPWIDGET, appWidgetId);
}
try {
iWm.lockNow(opts);
} catch (RemoteException e) {
}
// Change background to all black
ViewGroup root = (ViewGroup) findViewById(R.id.layout_root);
root.setBackgroundColor(0xFF000000);
// Hide all children
final int childCount = root.getChildCount();
for (int i = 0; i < childCount; i++) {
root.getChildAt(i).setVisibility(View.INVISIBLE);
}
mGridView.postDelayed(new Runnable() {
public void run() {
finish();
}
}, 500);
}
void startActivityForResultSafely(Intent intent, int requestCode) {
try {
startActivityForResult(intent, requestCode);
} catch (ActivityNotFoundException e) {
Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
} catch (SecurityException e) {
Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
Log.e(TAG, "Settings does not have the permission to launch " + intent, e);
}
}
}