我想从一个 Activity 中启动一个广播接收器。我有一个 Second.java 文件,它扩展了一个广播接收器和一个 Main.java 文件,我必须从中启动广播接收器。 我也尝试在 Main.java 中按如下方式执行所有操作,但不知道如何在 list 文件中定义...
Main.java:
public class Main extends Activity {
/** Called when the activity is first created. */
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
String rec_data = "Nothing Received";
private BroadcastReceiver myReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
if( intent.getStringExtra("send_data")!=null)
rec_data = intent.getStringExtra("send_data");
Log.d("Received Msg : ",rec_data);
}
};
}
protected void onResume() {
IntentFilter intentFilter = new IntentFilter();
//intentFilter.addDataType(String);
registerReceiver(myReceiver, intentFilter);
super.onResume();
}
@Override
protected void onPause() {
// TODO Auto-generated method stub
super.onPause();
this.unregisterReceiver(this.myReceiver);
}
}
如果我不能像上面那样在一个类中做所有事情,我如何从 Main.java 调用广播接收器?谁能让我知道我在哪里做错了?谢谢!
最佳答案
使用这个为什么发送自定义广播:
定义一个 Action 名称:
public static final String BROADCAST = "PACKAGE_NAME.android.action.broadcast";
AndroidManifest.xml 注册接收者:
<receiver android:name=".myReceiver" >
<intent-filter >
<action android:name="PACKAGE_NAME.android.action.broadcast"/>
</intent-filter>
</receiver>
注册接收者:
IntentFilter intentFilter = new IntentFilter(BROADCAST);
registerReceiver( myReceiver , intentFilter);
从您的 Activity 发送广播:
Intent intent = new Intent(BROADCAST);
Bundle extras = new Bundle();
extras.putString("send_data", "test");
intent.putExtras(extras);
sendBroadcast(intent);
你的广播接收器:
private BroadcastReceiver myReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
Bundle extras = intent.getExtras();
if (extras != null){
{
rec_data = extras.getString("send_data");
Log.d("Received Msg : ",rec_data);
}
}
};
有关自定义广播的更多信息,请参阅 Custom Intents and Broadcasting with Receivers
关于android - 从android中的 Activity 启动广播接收器,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/9972769/