我想使用具有对Activity的引用的动态注册BroadcastReceiver，以便它可以修改其UI。 我正在使用Context.registerReceiver()方法，但从未调用接收者的onReceive()方法。
这是显示问题的示例代码：
package com.example;
import android.app.Activity;
import android.app.IntentService;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.os.Bundle;
import android.util.Log;
import android.view.KeyEvent;
public class RegisterBroadcastReceiver extends Activity {
public static class MyIntentService extends IntentService {
public MyIntentService() {
super(MyIntentService.class.getSimpleName());
}
@Override
protected void onHandleIntent(Intent intent) {
Intent i = new Intent(this, MyBroadcastReceiver.class);
sendBroadcast(i);
}
}
public class MyBroadcastReceiver extends BroadcastReceiver {
@Override
public void onReceive(Context context, Intent intent) {
Log.i(MyBroadcastReceiver.class.getSimpleName(),
“received broadcast”);
}
}
/ Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
MyBroadcastReceiver mReceiver = new MyBroadcastReceiver();
@Override
protected void onResume() {
super.onResume();
IntentFilter intentFilter = new IntentFilter();
registerReceiver(mReceiver, intentFilter);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if (keyCode == KeyEvent.KEYCODE_MENU) {
Intent i = new Intent(this, MyIntentService.class);
startService(i);
}
return super.onKeyDown(keyCode, event);
}
@Override
protected void onPause() {
super.onPause();
unregisterReceiver(mReceiver);
}
}
发布者：全栈程序员-站长，转载请注明出处：https://javaforall.net/218821.html原文链接：https://javaforall.net
