相关疑难解决方法(0)

每当我的广播被执行时,我想向前台活动显示警报.

在我的应用程序中我使用IntentService发送短信.

    @Override
protected void onHandleIntent(Intent intent) {
    Bundle data = intent.getExtras();
    String[] recipients = null;
    String message = getString(R.string.unknown_event);
    String name = getString(R.string.app_name);
    if (data != null && data.containsKey(Constants.Services.RECIPIENTS)) {
        recipients = data.getStringArray(Constants.Services.RECIPIENTS);
        name = data.getString(Constants.Services.NAME);
        message = data.getString(Constants.Services.MESSAGE);
        for (int i = 0; i < recipients.length; i++) {
            if(!StringUtils.isNullOrEmpty(recipients[i])) {
                try {
                    Intent sendIntent = new Intent(this, SMSReceiver.class);
                    sendIntent.setAction(Constants.SMS.SEND_ACTION);
                    PendingIntent sendPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, sendIntent, PendingIntent.FLAG_UPDATE_CURRENT);
                    Intent deliveryIntent = new Intent(this, SMSReceiver.class);
                    deliveryIntent.setAction(Constants.SMS.DELIVERED_ACTION);
                    PendingIntent deliveryPendingIntent = PendingIntent.getBroadcast(getApplicationContext(), 0, deliveryIntent, …

此代码应该使用服务来显示Toast消息.没有错误,但它没有显示祝酒词.

主要活动

public class MainActivity extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Intent i= new Intent(this, BackgroundMusic.class);
    this.startService(i); 

}



}

服务(它被称为背景音乐,但现在它应该显示一个祝酒词)

public class BackgroundMusic extends IntentService {

 public BackgroundMusic() {
      super("BackgroundMusic");
  }



 @Override
  protected void onHandleIntent(Intent intent) {
      // Normally we would do some work here, like download a file.
      // For our sample, we just sleep for 5 seconds.
     Context context = getApplicationContext();
     CharSequence text = "Hello toast!";
     int duration = Toast.LENGTH_SHORT;

     Toast toast = …

我正在尝试让我的IntentService显示Toast消息,但是当从onHandleIntent消息发送它时,toast显示但是卡住了屏幕并且从不离开.我猜它是因为onHandleIntent方法不会发生在主服务线程上,但是我怎么能移动呢？

有人有这个问题并解决了吗？

更新: 我不同意这是一个重复 - 因为我正在寻找一种方法退出主应用程序,仍然显示从服务Toast.

在一个非常简单的测试应用程序中我有2个按钮:

单击任何按钮将运行带有相应操作字符串的服务("打开"或"闪烁") -

OpenActivity.java:

public class OpenActivity extends Activity {
    private Intent mServiceIntent;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_open);
        mServiceIntent = new Intent(this, RegionService.class);
   }

    public void openCar(View v) {
        mServiceIntent.setAction("open");
        startService(mServiceIntent);
    }

RegionService.java:

public class RegionService extends IntentService {
    private static final String TAG = "RegionService";

    @Override
    protected void onHandleIntent(Intent intent) {
        Log.d(TAG, "Received an intent: " + intent);
        String action = intent.getAction();
        Log.d(TAG, "Received an action: " + …