/*
* 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;
import android.graphics.ColorFilter;
import android.util.DisplayMetrics;
import com.android.internal.app.AlertActivity;
import com.android.internal.app.AlertController;
import android.app.Activity;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.Intent.ShortcutIconResource;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.content.res.Resources;
import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.graphics.PaintFlagsDrawFilter;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.graphics.drawable.PaintDrawable;
import android.os.Bundle;
import android.os.Parcelable;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
/**
* Displays a list of all activities matching the incoming
* {@link Intent#EXTRA_INTENT} query, along with any injected items.
*/
public class ActivityPicker extends AlertActivity implements
DialogInterface.OnClickListener, DialogInterface.OnCancelListener {
/**
* Adapter of items that are displayed in this dialog.
*/
private PickAdapter mAdapter;
/**
* Base {@link Intent} used when building list.
*/
private Intent mBaseIntent;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
final Intent intent = getIntent();
// Read base intent from extras, otherwise assume default
Parcelable parcel = intent.getParcelableExtra(Intent.EXTRA_INTENT);
if (parcel instanceof Intent) {
mBaseIntent = (Intent) parcel;
} else {
mBaseIntent = new Intent(Intent.ACTION_MAIN, null);
mBaseIntent.addCategory(Intent.CATEGORY_DEFAULT);
}
// Create dialog parameters
AlertController.AlertParams params = mAlertParams;
params.mOnClickListener = this;
params.mOnCancelListener = this;
// Use custom title if provided, otherwise default window title
if (intent.hasExtra(Intent.EXTRA_TITLE)) {
params.mTitle = intent.getStringExtra(Intent.EXTRA_TITLE);
} else {
params.mTitle = getTitle();
}
// Build list adapter of pickable items
List<PickAdapter.Item> items = getItems();
mAdapter = new PickAdapter(this, items);
params.mAdapter = mAdapter;
setupAlert();
}
/**
* Handle clicking of dialog item by passing back
* {@link #getIntentForPosition(int)} in {@link #setResult(int, Intent)}.
*/
public void onClick(DialogInterface dialog, int which) {
Intent intent = getIntentForPosition(which);
setResult(Activity.RESULT_OK, intent);
finish();
}
/**
* Handle canceled dialog by passing back {@link Activity#RESULT_CANCELED}.
*/
public void onCancel(DialogInterface dialog) {
setResult(Activity.RESULT_CANCELED);
finish();
}
/**
* Build the specific {@link Intent} for a given list position. Convenience
* method that calls through to {@link PickAdapter.Item#getIntent(Intent)}.
*/
protected Intent getIntentForPosition(int position) {
PickAdapter.Item item = (PickAdapter.Item) mAdapter.getItem(position);
return item.getIntent(mBaseIntent);
}
/**
* Build and return list of items to be shown in dialog. Default
* implementation mixes activities matching {@link #mBaseIntent} from
* {@link #putIntentItems(Intent, List)} with any injected items from
* {@link Intent#EXTRA_SHORTCUT_NAME}. Override this method in subclasses to
* change the items shown.
*/
protected List<PickAdapter.Item> getItems() {
PackageManager packageManager = getPackageManager();
List<PickAdapter.Item> items = new ArrayList<PickAdapter.Item>();
// Add any injected pick items
final Intent intent = getIntent();
ArrayList<String> labels =
intent.getStringArrayListExtra(Intent.EXTRA_SHORTCUT_NAME);
ArrayList<ShortcutIconResource> icons =
intent.getParcelableArrayListExtra(Intent.EXTRA_SHORTCUT_ICON_RESOURCE);
if (labels != null && icons != null && labels.size() == icons.size()) {
for (int i = 0; i < labels.size(); i++) {
String label = labels.get(i);
Drawable icon = null;
try {
// Try loading icon from requested package
ShortcutIconResource iconResource = icons.get(i);
Resources res = packageManager.getResourcesForApplication(
iconResource.packageName);
icon = res.getDrawable(res.getIdentifier(
iconResource.resourceName, null, null));
} catch (NameNotFoundException e) {
// Ignore
}
items.add(new PickAdapter.Item(this, label, icon));
}
}
// Add any intent items if base was given
if (mBaseIntent != null) {
putIntentItems(mBaseIntent, items);
}
return items;
}
/**
* Fill the given list with any activities matching the base {@link Intent}.
*/
protected void putIntentItems(Intent baseIntent, List<PickAdapter.Item> items) {
PackageManager packageManager = getPackageManager();
List<ResolveInfo> list = packageManager.queryIntentActivities(baseIntent,
0 /* no flags */);
Collections.sort(list, new ResolveInfo.DisplayNameComparator(packageManager));
final int listSize = list.size();
for (int i = 0; i < listSize; i++) {
ResolveInfo resolveInfo = list.get(i);
items.add(new PickAdapter.Item(this, packageManager, resolveInfo));
}
}
/**
* Adapter which shows the set of activities that can be performed for a
* given {@link Intent}.
*/
protected static class PickAdapter extends BaseAdapter {
/**
* Item that appears in a {@link PickAdapter} list.
*/
public static class Item {
protected static IconResizer sResizer;
protected IconResizer getResizer(Context context) {
if (sResizer == null) {
final Resources resources = context.getResources();
int size = (int) resources.getDimension(android.R.dimen.app_icon_size);
sResizer = new IconResizer(size, size, resources.getDisplayMetrics());
}
return sResizer;
}
CharSequence label;
Drawable icon;
String packageName;
String className;
Bundle extras;
/**
* Create a list item from given label and icon.
*/
Item(Context context, CharSequence label, Drawable icon) {
this.label = label;
this.icon = getResizer(context).createIconThumbnail(icon);
}
/**
* Create a list item and fill it with details from the given
* {@link ResolveInfo} object.
*/
Item(Context context, PackageManager pm, ResolveInfo resolveInfo) {
label = resolveInfo.loadLabel(pm);
if (label == null && resolveInfo.activityInfo != null) {
label = resolveInfo.activityInfo.name;
}
icon = getResizer(context).createIconThumbnail(resolveInfo.loadIcon(pm));
packageName = resolveInfo.activityInfo.applicationInfo.packageName;
className = resolveInfo.activityInfo.name;
}
/**
* 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 baseIntent) {
Intent intent = new Intent(baseIntent);
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;
}
}
private final LayoutInflater mInflater;
private final List<Item> mItems;
/**
* Create an adapter for the given items.
*/
public PickAdapter(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.pick_item, parent, false);
}
Item item = (Item) getItem(position);
TextView textView = (TextView) convertView;
textView.setText(item.label);
textView.setCompoundDrawablesWithIntrinsicBounds(item.icon, null, null, null);
return convertView;
}
}
/**
* Utility class to resize icons to match default icon size. Code is mostly
* borrowed from Launcher.
*/
private static class IconResizer {
private final int mIconWidth;
private final int mIconHeight;
private final DisplayMetrics mMetrics;
private final Rect mOldBounds = new Rect();
private final Canvas mCanvas = new Canvas();
public IconResizer(int width, int height, DisplayMetrics metrics) {
mCanvas.setDrawFilter(new PaintFlagsDrawFilter(Paint.DITHER_FLAG,
Paint.FILTER_BITMAP_FLAG));
mMetrics = metrics;
mIconWidth = width;
mIconHeight = height;
}
/**
* Returns a Drawable representing the thumbnail of the specified Drawable.
* The size of the thumbnail is defined by the dimension
* android.R.dimen.launcher_application_icon_size.
*
* This method is not thread-safe and should be invoked on the UI thread only.
*
* @param icon The icon to get a thumbnail of.
*
* @return A thumbnail for the specified icon or the icon itself if the
* thumbnail could not be created.
*/
public Drawable createIconThumbnail(Drawable icon) {
int width = mIconWidth;
int height = mIconHeight;
if (icon == null) {
return new EmptyDrawable(width, height);
}
try {
if (icon instanceof PaintDrawable) {
PaintDrawable painter = (PaintDrawable) icon;
painter.setIntrinsicWidth(width);
painter.setIntrinsicHeight(height);
} else if (icon instanceof BitmapDrawable) {
// Ensure the bitmap has a density.
BitmapDrawable bitmapDrawable = (BitmapDrawable) icon;
Bitmap bitmap = bitmapDrawable.getBitmap();
if (bitmap.getDensity() == Bitmap.DENSITY_NONE) {
bitmapDrawable.setTargetDensity(mMetrics);
}
}
int iconWidth = icon.getIntrinsicWidth();
int iconHeight = icon.getIntrinsicHeight();
if (iconWidth > 0 && iconHeight > 0) {
if (width < iconWidth || height < iconHeight) {
final float ratio = (float) iconWidth / iconHeight;
if (iconWidth > iconHeight) {
height = (int) (width / ratio);
} else if (iconHeight > iconWidth) {
width = (int) (height * ratio);
}
final Bitmap.Config c = icon.getOpacity() != PixelFormat.OPAQUE ?
Bitmap.Config.ARGB_8888 : Bitmap.Config.RGB_565;
final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
final Canvas canvas = mCanvas;
canvas.setBitmap(thumb);
// Copy the old bounds to restore them later
// If we were to do oldBounds = icon.getBounds(),
// the call to setBounds() that follows would
// change the same instance and we would lose the
// old bounds
mOldBounds.set(icon.getBounds());
final int x = (mIconWidth - width) / 2;
final int y = (mIconHeight - height) / 2;
icon.setBounds(x, y, x + width, y + height);
icon.draw(canvas);
icon.setBounds(mOldBounds);
//noinspection deprecation
icon = new BitmapDrawable(thumb);
((BitmapDrawable) icon).setTargetDensity(mMetrics);
canvas.setBitmap(null);
} else if (iconWidth < width && iconHeight < height) {
final Bitmap.Config c = Bitmap.Config.ARGB_8888;
final Bitmap thumb = Bitmap.createBitmap(mIconWidth, mIconHeight, c);
final Canvas canvas = mCanvas;
canvas.setBitmap(thumb);
mOldBounds.set(icon.getBounds());
final int x = (width - iconWidth) / 2;
final int y = (height - iconHeight) / 2;
icon.setBounds(x, y, x + iconWidth, y + iconHeight);
icon.draw(canvas);
icon.setBounds(mOldBounds);
//noinspection deprecation
icon = new BitmapDrawable(thumb);
((BitmapDrawable) icon).setTargetDensity(mMetrics);
canvas.setBitmap(null);
}
}
} catch (Throwable t) {
icon = new EmptyDrawable(width, height);
}
return icon;
}
}
private static class EmptyDrawable extends Drawable {
private final int mWidth;
private final int mHeight;
EmptyDrawable(int width, int height) {
mWidth = width;
mHeight = height;
}
@Override
public int getIntrinsicWidth() {
return mWidth;
}
@Override
public int getIntrinsicHeight() {
return mHeight;
}
@Override
public int getMinimumWidth() {
return mWidth;
}
@Override
public int getMinimumHeight() {
return mHeight;
}
@Override
public void draw(Canvas canvas) {
}
@Override
public void setAlpha(int alpha) {
}
@Override
public void setColorFilter(ColorFilter cf) {
}
@Override
public int getOpacity() {
return PixelFormat.TRANSLUCENT;
}
}
}