Android 发送广播

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一、首先要声明广播

    private BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver()      {          @Override          public void onReceive(Context context, Intent intent) //onReceive函数不能做耗时的事情，参考值：10s以内          {              Log.d("scott", "on receive action="+intent.getAction());              String action = intent.getAction();              if (action.equals("com.scott.sayhi"))              {                  showDialog("on receive action="+intent.getAction());              }          }      };

二、其次要注册广播，有两种方式：xml注册和代码注册

xml注册：

<receiver android:name="com.scott.sayhi.MyBroadcastReceiver" ><intent-filter><action android:name="com.scott.sayhi" /></intent-filter></receiver>

代码注册：

IntentFilter filter = new IntentFilter();filter.addAction("com.scott.sayhi");MyActivity.this.registerReceiver(mBroadcastReceiver, filter);

三、发送广播

    Intent intent = new Intent();      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);      intent.setAction("com.scott.sayhi");      MyActivity.this.sendBroadcast(intent);

四、收听开机广播

<intent-filter><action android:name="android.intent.action.BOOT_COMPLETED" /><category android:name="android.intent.category.HOME" /></intent-filter>

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