AppCompatDelegate.java revision 547a80d347e0dc9751bbe3cf91f947477145bdba 
1/*
2 * Copyright (C) 2014 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 android.support.v7.app;
18
19import android.app.Activity;
20import android.app.Dialog;
21import android.content.Context;
22import android.content.res.Configuration;
23import android.os.Build;
24import android.os.Bundle;
25import android.support.annotation.NonNull;
26import android.support.v4.app.FragmentActivity;
27import android.support.v7.view.ActionMode;
28import android.support.v7.widget.Toolbar;
29import android.util.AttributeSet;
30import android.view.MenuInflater;
31import android.view.View;
32import android.view.ViewGroup;
33import android.view.Window;
34
35/**
36 * This class represents a delegate which you can use to extend AppCompat's support to any
37 * {@link android.app.Activity}.
38 * <p>
39 * When using an {@link AppCompatDelegate}, you should any methods exposed in it rather than the
40 * {@link android.app.Activity} method of the same name. This applies to:
41 * <ul>
42 *     <li>{@link #addContentView(android.view.View, android.view.ViewGroup.LayoutParams)}</li>
43 *     <li>{@link #setContentView(int)}</li>
44 *     <li>{@link #setContentView(android.view.View)}</li>
45 *     <li>{@link #setContentView(android.view.View, android.view.ViewGroup.LayoutParams)}</li>
46 *     <li>{@link #requestWindowFeature(int)}</li>
47 *     <li>{@link #invalidateOptionsMenu()}</li>
48 *     <li>{@link #startSupportActionMode(android.support.v7.view.ActionMode.Callback)}</li>
49 *     <li>{@link #setSupportActionBar(android.support.v7.widget.Toolbar)}</li>
50 *     <li>{@link #getSupportActionBar()}</li>
51 *     <li>{@link #getMenuInflater()}</li>
52 * </ul>
53 * There also some Activity lifecycle methods which should be proxied to the delegate:
54 * <ul>
55 *     <li>{@link #onCreate(android.os.Bundle)}</li>
56 *     <li>{@link #onPostCreate(android.os.Bundle)}</li>
57 *     <li>{@link #onConfigurationChanged(android.content.res.Configuration)}</li>
58 *     <li>{@link #setTitle(CharSequence)}</li>
59 *     <li>{@link #onStop()}</li>
60 *     <li>{@link #onDestroy()}</li>
61 * </ul>
62 * <p>
63 * An {@link Activity} can only be linked with one {@link AppCompatDelegate} instance,
64 * so the instance returned from {@link #create(Activity, AppCompatCallback)} should be kept
65 * until the Activity is destroyed.
66 */
67public abstract class AppCompatDelegate {
68
69    static final String TAG = "AppCompatDelegate";
70
71    /**
72     * Create a {@link android.support.v7.app.AppCompatDelegate} to use with {@code activity}.
73     *
74     * @param callback An optional callback for AppCompat specific events
75     */
76    public static AppCompatDelegate create(Activity activity, AppCompatCallback callback) {
77        return create(activity, activity.getWindow(), callback);
78    }
79
80    /**
81     * Create a {@link android.support.v7.app.AppCompatDelegate} to use with {@code dialog}.
82     *
83     * @param callback An optional callback for AppCompat specific events
84     */
85    public static AppCompatDelegate create(Dialog dialog, AppCompatCallback callback) {
86        return create(dialog.getContext(), dialog.getWindow(), callback);
87    }
88
89    private static AppCompatDelegate create(Context context, Window window,
90            AppCompatCallback callback) {
91        final int sdk = Build.VERSION.SDK_INT;
92        if (sdk >= 14) {
93            return new AppCompatDelegateImplV14(context, window, callback);
94        } else if (sdk >= 11) {
95            return new AppCompatDelegateImplV11(context, window, callback);
96        } else {
97            return new AppCompatDelegateImplV7(context, window, callback);
98        }
99    }
100
101    /**
102     * Private constructor
103     */
104    AppCompatDelegate() {}
105
106    /**
107     * Support library version of {@link Activity#getActionBar}.
108     *
109     * @return AppCompat's action bar, or null if it does not have one.
110     */
111    public abstract ActionBar getSupportActionBar();
112
113    /**
114     * Set a {@link Toolbar} to act as the {@link ActionBar} for this delegate.
115     *
116     * <p>When set to a non-null value the {@link #getSupportActionBar()} ()} method will return
117     * an {@link ActionBar} object that can be used to control the given toolbar as if it were
118     * a traditional window decor action bar. The toolbar's menu will be populated with the
119     * Activity's options menu and the navigation button will be wired through the standard
120     * {@link android.R.id#home home} menu select action.</p>
121     *
122     * <p>In order to use a Toolbar within the Activity's window content the application
123     * must not request the window feature
124     * {@link android.view.Window#FEATURE_ACTION_BAR FEATURE_ACTION_BAR}.</p>
125     *
126     * @param toolbar Toolbar to set as the Activity's action bar
127     */
128    public abstract void setSupportActionBar(Toolbar toolbar);
129
130    /**
131     * Return the value of this call from your {@link Activity#getMenuInflater()}
132     */
133    public abstract MenuInflater getMenuInflater();
134
135    /**
136     * Should be called from {@link Activity#onCreate Activity.onCreate()}
137     */
138    public abstract void onCreate(Bundle savedInstanceState);
139
140    /**
141     * Should be called from {@link Activity#onPostCreate(android.os.Bundle)}
142     */
143    public abstract void onPostCreate(Bundle savedInstanceState);
144
145    /**
146     * Should be called from
147     * {@link Activity#onConfigurationChanged}
148     */
149    public abstract void onConfigurationChanged(Configuration newConfig);
150
151    /**
152     * Should be called from {@link Activity#onStop Activity.onStop()}
153     */
154    public abstract void onStop();
155
156    /**
157     * Should be called from {@link Activity#onPostResume()}
158     */
159    public abstract void onPostResume();
160
161    /**
162     * Should be called instead of {@link Activity#setContentView(android.view.View)}}
163     */
164    public abstract void setContentView(View v);
165
166    /**
167     * Should be called instead of {@link Activity#setContentView(int)}}
168     */
169    public abstract void setContentView(int resId);
170
171    /**
172     * Should be called instead of
173     * {@link Activity#setContentView(android.view.View, android.view.ViewGroup.LayoutParams)}}
174     */
175    public abstract void setContentView(View v, ViewGroup.LayoutParams lp);
176
177    /**
178     * Should be called instead of
179     * {@link Activity#addContentView(android.view.View, android.view.ViewGroup.LayoutParams)}}
180     */
181    public abstract void addContentView(View v, ViewGroup.LayoutParams lp);
182
183    /**
184     * Should be called from {@link Activity#onTitleChanged(CharSequence, int)}}
185     */
186    public abstract void setTitle(CharSequence title);
187
188    /**
189     * Should be called from {@link Activity#invalidateOptionsMenu()}} or
190     * {@link FragmentActivity#supportInvalidateOptionsMenu()}.
191     */
192    public abstract void invalidateOptionsMenu();
193
194    /**
195     * Should be called from {@link Activity#onDestroy()}
196     */
197    public abstract void onDestroy();
198
199    /**
200     * Returns an {@link ActionBarDrawerToggle.Delegate} which can be returned from your Activity
201     * if it implements {@link ActionBarDrawerToggle.DelegateProvider}.
202     */
203    public abstract ActionBarDrawerToggle.Delegate getDrawerToggleDelegate();
204
205    /**
206     * Enable extended window features.  This should be called instead of
207     * {@link android.app.Activity#requestWindowFeature(int)} or
208     * {@link android.view.Window#requestFeature getWindow().requestFeature()}.
209     *
210     * @param featureId The desired feature as defined in {@link android.view.Window}.
211     * @return Returns true if the requested feature is supported and now
212     *         enabled.
213     */
214    public abstract boolean requestWindowFeature(int featureId);
215
216    /**
217     * Start an action mode.
218     *
219     * @param callback Callback that will manage lifecycle events for this context mode
220     * @return The ContextMode that was started, or null if it was canceled
221     */
222    public abstract ActionMode startSupportActionMode(ActionMode.Callback callback);
223
224    /**
225     * Installs AppCompat's {@link android.view.LayoutInflater} Factory so that it can replace
226     * the framework widgets with compatible tinted versions. This should be called before
227     * {@code super.onCreate()} as so:
228     * <pre class="prettyprint">
229     * protected void onCreate(Bundle savedInstanceState) {
230     *     getDelegate().installViewFactory();
231     *     super.onCreate(savedInstanceState);
232     *     getDelegate().onCreate(savedInstanceState);
233     *
234     *     // ...
235     * }
236     * </pre>
237     * If you are using your own {@link android.view.LayoutInflater.Factory Factory} or
238     * {@link android.view.LayoutInflater.Factory2 Factory2} then you can omit this call, and instead call
239     * {@link #createView(android.view.View, String, android.content.Context, android.util.AttributeSet)}
240     * from your factory to return any compatible widgets.
241     */
242    public abstract void installViewFactory();
243
244    /**
245     * This should be called from a
246     * {@link android.support.v4.view.LayoutInflaterFactory LayoutInflaterFactory} in order
247     * to return tint-aware widgets.
248     * <p>
249     * This is only needed if you are using your own
250     * {@link android.view.LayoutInflater LayoutInflater} factory, and have therefore not
251     * installed the default factory via {@link #installViewFactory()}.
252     */
253    public abstract View createView(View parent, String name, @NonNull Context context,
254            @NonNull AttributeSet attrs);
255
256    /**
257     * Whether AppCompat handles any native action modes itself.
258     * <p>This methods only takes effect on
259     * {@link android.os.Build.VERSION_CODES#ICE_CREAM_SANDWICH} and above.
260     *
261     * @param enabled whether AppCompat should handle native action modes.
262     */
263    public abstract void setHandleNativeActionModesEnabled(boolean enabled);
264
265    /**
266     * Returns whether AppCompat handles any native action modes itself.
267     *
268     * @return true if AppCompat should handle native action modes.
269     */
270    public abstract boolean isHandleNativeActionModesEnabled();
271
272}
273