1/*
2 * Copyright (C) 2009 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.settings;
18
19import android.appwidget.AppWidgetManager;
20import android.appwidget.AppWidgetProviderInfo;
21import android.content.Context;
22import android.content.DialogInterface;
23import android.content.Intent;
24import android.content.pm.PackageManager;
25import android.content.pm.PackageManager.NameNotFoundException;
26import android.content.res.Resources;
27import android.graphics.drawable.Drawable;
28import android.os.Bundle;
29import android.util.DisplayMetrics;
30import android.util.Log;
31
32import com.android.settings.ActivityPicker.PickAdapter;
33
34import java.util.List;
35
36/**
37 * Displays a list of {@link AppWidgetProviderInfo} widgets, along with any
38 * injected special widgets specified through
39 * {@link AppWidgetManager#EXTRA_CUSTOM_INFO} and
40 * {@link AppWidgetManager#EXTRA_CUSTOM_EXTRAS}.
41 * <p>
42 * When an installed {@link AppWidgetProviderInfo} is selected, this activity
43 * will bind it to the given {@link AppWidgetManager#EXTRA_APPWIDGET_ID},
44 * otherwise it will return the requested extras.
45 */
46public class AppWidgetPickActivity extends ActivityPicker
47    implements AppWidgetLoader.ItemConstructor<PickAdapter.Item>{
48    private static final String TAG = "AppWidgetPickActivity";
49    static final boolean LOGD = false;
50
51    List<PickAdapter.Item> mItems;
52
53    /**
54     * The allocated {@link AppWidgetManager#EXTRA_APPWIDGET_ID} that this
55     * activity is binding.
56     */
57    private int mAppWidgetId;
58    private AppWidgetLoader<PickAdapter.Item> mAppWidgetLoader;
59    private AppWidgetManager mAppWidgetManager;
60    private PackageManager mPackageManager;
61
62    @Override
63    public void onCreate(Bundle icicle) {
64        mPackageManager = getPackageManager();
65        mAppWidgetManager = AppWidgetManager.getInstance(this);
66        mAppWidgetLoader = new AppWidgetLoader<PickAdapter.Item>
67            (this, mAppWidgetManager, this);
68
69        super.onCreate(icicle);
70
71        // Set default return data
72        setResultData(RESULT_CANCELED, null);
73
74        // Read the appWidgetId passed our direction, otherwise bail if not found
75        final Intent intent = getIntent();
76        if (intent.hasExtra(AppWidgetManager.EXTRA_APPWIDGET_ID)) {
77            mAppWidgetId = intent.getIntExtra(AppWidgetManager.EXTRA_APPWIDGET_ID,
78                    AppWidgetManager.INVALID_APPWIDGET_ID);
79        } else {
80            finish();
81        }
82    }
83
84    /**
85     * Build and return list of items to be shown in dialog. This will mix both
86     * installed {@link AppWidgetProviderInfo} and those provided through
87     * {@link AppWidgetManager#EXTRA_CUSTOM_INFO}, sorting them alphabetically.
88     */
89    @Override
90    protected List<PickAdapter.Item> getItems() {
91        mItems = mAppWidgetLoader.getItems(getIntent());
92        return mItems;
93    }
94
95    @Override
96    public PickAdapter.Item createItem(Context context, AppWidgetProviderInfo info, Bundle extras) {
97        CharSequence label = info.label;
98        Drawable icon = null;
99
100        if (info.icon != 0) {
101            try {
102                final Resources res = context.getResources();
103                final int density = res.getDisplayMetrics().densityDpi;
104                int iconDensity;
105                switch (density) {
106                    case DisplayMetrics.DENSITY_MEDIUM:
107                        iconDensity = DisplayMetrics.DENSITY_LOW;
108                    case DisplayMetrics.DENSITY_TV:
109                        iconDensity = DisplayMetrics.DENSITY_MEDIUM;
110                    case DisplayMetrics.DENSITY_HIGH:
111                        iconDensity = DisplayMetrics.DENSITY_MEDIUM;
112                    case DisplayMetrics.DENSITY_XHIGH:
113                        iconDensity = DisplayMetrics.DENSITY_HIGH;
114                    case DisplayMetrics.DENSITY_XXHIGH:
115                        iconDensity = DisplayMetrics.DENSITY_XHIGH;
116                    default:
117                        // The density is some abnormal value.  Return some other
118                        // abnormal value that is a reasonable scaling of it.
119                        iconDensity = (int)((density*0.75f)+.5f);
120                }
121                Resources packageResources = mPackageManager.
122                        getResourcesForApplication(info.provider.getPackageName());
123                icon = packageResources.getDrawableForDensity(info.icon, iconDensity);
124            } catch (NameNotFoundException e) {
125                Log.w(TAG, "Can't load icon drawable 0x" + Integer.toHexString(info.icon)
126                        + " for provider: " + info.provider);
127            }
128            if (icon == null) {
129                Log.w(TAG, "Can't load icon drawable 0x" + Integer.toHexString(info.icon)
130                        + " for provider: " + info.provider);
131            }
132        }
133
134        PickAdapter.Item item = new PickAdapter.Item(context, label, icon);
135        item.packageName = info.provider.getPackageName();
136        item.className = info.provider.getClassName();
137        item.extras = extras;
138        return item;
139    }
140
141    /**
142     * {@inheritDoc}
143     */
144    @Override
145    public void onClick(DialogInterface dialog, int which) {
146        Intent intent = getIntentForPosition(which);
147        PickAdapter.Item item = mItems.get(which);
148
149        int result;
150        if (item.extras != null) {
151            // If these extras are present it's because this entry is custom.
152            // Don't try to bind it, just pass it back to the app.
153            setResultData(RESULT_OK, intent);
154        } else {
155            try {
156                Bundle options = null;
157                if (intent.getExtras() != null) {
158                    options = intent.getExtras().getBundle(
159                            AppWidgetManager.EXTRA_APPWIDGET_OPTIONS);
160                }
161                mAppWidgetManager.bindAppWidgetId(mAppWidgetId, intent.getComponent(), options);
162                result = RESULT_OK;
163            } catch (IllegalArgumentException e) {
164                // This is thrown if they're already bound, or otherwise somehow
165                // bogus.  Set the result to canceled, and exit.  The app *should*
166                // clean up at this point.  We could pass the error along, but
167                // it's not clear that that's useful -- the widget will simply not
168                // appear.
169                result = RESULT_CANCELED;
170            }
171            setResultData(result, null);
172        }
173
174        finish();
175    }
176
177
178    /**
179     * Convenience method for setting the result code and intent. This method
180     * correctly injects the {@link AppWidgetManager#EXTRA_APPWIDGET_ID} that
181     * most hosts expect returned.
182     */
183    void setResultData(int code, Intent intent) {
184        Intent result = intent != null ? intent : new Intent();
185        result.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, mAppWidgetId);
186        setResult(code, result);
187    }
188}
189