广播 -- Demo

一、静态注册的广播接收器

1. AndroidManifest.xml

   <receiver android:name=".TestBroadcastReceiver">
       <intent-filter>
           <action android:name="com.tomorrow.intent.action.test"/>
       </intent-filter>
   </receiver>
   

2. TestBroadcastReceiver

   public class TestBroadcastReceiver extends BroadcastReceiver {
       private static final String TAG = TestBroadcastReceiver.class.getSimpleName();
   
       @Override
       public void onReceive(Context context, Intent intent) {
           Log.d(TAG, String.format("zwm, onReceive, action: %s", intent.getAction()));
       }
   }
   

3. MainActivity

   public class MainActivity extends AppCompatActivity {
       private static final String TAG = MainActivity.class.getSimpleName();
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
           Log.d(TAG, "zwm, onCreate");
   
           Intent intent = new Intent();
           intent.setAction("com.tomorrow.intent.action.test");
           //注意：需要添加以下语句，静态注册的广播接收器才能接收到广播
           intent.setPackage(getPackageName()); 
           sendBroadcast(intent);
       }
   }
   

4. 打印日志

   2020-03-25 19:16:30.702 14517-14517/com.tomorrow.architetest D/MainActivity: zwm, onCreate
   2020-03-25 19:16:30.733 14517-14517/com.tomorrow.architetest D/TestBroadcastReceiver: zwm, onReceive, action: com.tomorrow.intent.action.test
   

二、动态注册的广播接收器

1. AndroidManifest.xml

   //不需要注册
   

2. TestBroadcastReceiver

   public class TestBroadcastReceiver extends BroadcastReceiver {
       private static final String TAG = TestBroadcastReceiver.class.getSimpleName();
   
       @Override
       public void onReceive(Context context, Intent intent) {
           Log.d(TAG, String.format("zwm, onReceive, action: %s", intent.getAction()));
       }
   }
   

3. MainActivity

   public class MainActivity extends AppCompatActivity {
       private static final String TAG = MainActivity.class.getSimpleName();
       private TestBroadcastReceiver mReceiver;
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
           Log.d(TAG, "zwm, onCreate");
   
           mReceiver = new TestBroadcastReceiver();
           IntentFilter intentFilter = new IntentFilter();
           intentFilter.addAction("com.tomorrow.intent.action.test");
           registerReceiver(mReceiver, intentFilter);
   
           new Handler().postDelayed(new Runnable() {
               @Override
               public void run() {
                   Intent intent = new Intent();
                   intent.setAction("com.tomorrow.intent.action.test");
                   sendBroadcast(intent);
               }
           }, 3000);
       }
   
       @Override
       protected void onDestroy() {
           super.onDestroy();
           Log.d(TAG, "zwm, onDestroy");
           unregisterReceiver(mReceiver);
       }
   }
   

4. 打印日志

   2020-03-25 19:34:57.226 16185-16185/com.tomorrow.architetest D/MainActivity: zwm, onCreate
   2020-03-25 19:35:00.242 16185-16185/com.tomorrow.architetest D/TestBroadcastReceiver: zwm, onReceive, action: com.tomorrow.intent.action.test
   

三、使用本地广播动态注册的广播接收器

1. AndroidManifest.xml

   //不需要注册
   

2. TestBroadcastReceiver

   public class TestBroadcastReceiver extends BroadcastReceiver {
       private static final String TAG = TestBroadcastReceiver.class.getSimpleName();
   
       @Override
       public void onReceive(Context context, Intent intent) {
           Log.d(TAG, String.format("zwm, onReceive, action: %s", intent.getAction()));
       }
   }
   

3. MainActivity

   public class MainActivity extends AppCompatActivity {
       private static final String TAG = MainActivity.class.getSimpleName();
       private LocalBroadcastManager mLocalBroadcastManager;
       private TestBroadcastReceiver mReceiver;
   
       @Override
       protected void onCreate(Bundle savedInstanceState) {
           super.onCreate(savedInstanceState);
           setContentView(R.layout.activity_main);
           Log.d(TAG, "zwm, onCreate");
   
           mLocalBroadcastManager = LocalBroadcastManager.getInstance(getApplicationContext());
           mReceiver = new TestBroadcastReceiver();
           IntentFilter intentFilter = new IntentFilter();
           intentFilter.addAction("com.tomorrow.intent.action.test");
           mLocalBroadcastManager.registerReceiver(mReceiver, intentFilter);
   
           new Handler().postDelayed(new Runnable() {
               @Override
               public void run() {
                   Intent intent = new Intent();
                   intent.setAction("com.tomorrow.intent.action.test");
                   mLocalBroadcastManager.sendBroadcast(intent);
               }
           }, 3000);
       }
   
       @Override
       protected void onDestroy() {
           super.onDestroy();
           Log.d(TAG, "zwm, onDestroy");
           mLocalBroadcastManager.unregisterReceiver(mReceiver);
       }
   }
   

4. 打印日志

   2020-03-25 20:02:37.409 20817-20817/com.tomorrow.architetest D/MainActivity: zwm, onCreate
   2020-03-25 20:02:40.417 20817-20817/com.tomorrow.architetest D/TestBroadcastReceiver: zwm, onReceive, action: com.tomorrow.intent.action.test