ContactsActivity.java revision 0dafecbe5dbf810d83f9cf0ce590e8e055c53a48 
1/*
2 * Copyright (C) 2010 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.contacts;
18
19import com.android.contacts.test.InjectedServices;
20
21import android.app.Activity;
22import android.app.Fragment;
23import android.app.FragmentManager;
24import android.content.ContentResolver;
25import android.content.Intent;
26import android.content.SharedPreferences;
27import android.os.Bundle;
28import android.view.View;
29
30/**
31 * A common superclass for Contacts activities that handles application-wide services.
32 */
33public abstract class ContactsActivity extends Activity
34    implements ContactSaveService.Listener
35{
36
37    private ContentResolver mContentResolver;
38
39    @Override
40    public ContentResolver getContentResolver() {
41        if (mContentResolver == null) {
42            InjectedServices services = ContactsApplication.getInjectedServices();
43            if (services != null) {
44                mContentResolver = services.getContentResolver();
45            }
46            if (mContentResolver == null) {
47                mContentResolver = super.getContentResolver();
48            }
49        }
50        return mContentResolver;
51    }
52
53    @Override
54    public SharedPreferences getSharedPreferences(String name, int mode) {
55        InjectedServices services = ContactsApplication.getInjectedServices();
56        if (services != null) {
57            SharedPreferences prefs = services.getSharedPreferences();
58            if (prefs != null) {
59                return prefs;
60            }
61        }
62
63        return super.getSharedPreferences(name, mode);
64    }
65
66    @Override
67    public Object getSystemService(String name) {
68        Object service = super.getSystemService(name);
69        if (service != null) {
70            return service;
71        }
72
73        return getApplicationContext().getSystemService(name);
74    }
75
76    @Override
77    protected void onCreate(Bundle savedInstanceState) {
78        ContactSaveService.registerListener(this);
79        super.onCreate(savedInstanceState);
80    }
81
82    @Override
83    protected void onDestroy() {
84        ContactSaveService.unregisterListener(this);
85        super.onDestroy();
86    }
87
88    @Override
89    public void onServiceCompleted(Intent callbackIntent) {
90        onNewIntent(callbackIntent);
91    }
92
93    /**
94     * Convenient version of {@link FragmentManager#findFragmentById(int)}, which throws
95     * an exception if the fragment doesn't exist.
96     */
97    @SuppressWarnings("unchecked")
98    public <T extends Fragment> T getFragment(int id) {
99        T result = (T)getFragmentManager().findFragmentById(id);
100        if (result == null) {
101            throw new IllegalArgumentException("fragment 0x" + Integer.toHexString(id)
102                    + " doesn't exist");
103        }
104        return result;
105    }
106
107    /**
108     * Convenient version of {@link #findViewById(int)}, which throws
109     * an exception if the view doesn't exist.
110     */
111    @SuppressWarnings("unchecked")
112    public <T extends View> T getView(int id) {
113        T result = (T)findViewById(id);
114        if (result == null) {
115            throw new IllegalArgumentException("view 0x" + Integer.toHexString(id)
116                    + " doesn't exist");
117        }
118        return result;
119    }
120}
121