Service更新UI

Service使用發送廣播的方式更新UI, 方法如下：

首先在啓動Service的方法中的線程中發送廣播：

@Override
public int onStartCommand(Intent intent, int flags, int startId) {

    new Thread(new Runnable() {
        @Override
        public void run() {
            int i = 0;
            while (true) {
                Intent intent = new Intent();
                intent.putExtra("progress", i);
                intent.setAction("android.intent.action.progress");
                sendBroadcast(intent);
                i++;
                try {
                    Thread.sleep(1000);
                } catch (InterruptedException e) {
                    e.printStackTrace();
                }
            }
        }
    }).start();

    return super.onStartCommand(intent, flags, startId);
}

在Activity中註冊並接收指定的廣播：

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_bind);
    textView = (TextView) findViewById(R.id.bindText);

    startService(new Intent(this, MyBindService.class));
}


public void bind(View view) {

    receiver = new ProgressReceiver();
    IntentFilter filter = new IntentFilter();
    filter.addAction("android.intent.action.progress")；

    registerReceiver(receiver, filter);

}


public class ProgressReceiver extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        int progress = intent.getIntExtra("progress", -1);
        Log.d("===", "===> " + progress);
        textView.setText("progress " + progress);
    }
}