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我有一個廣播接收器，在電話啓動時運行一個待定的意圖。掛起的意圖打開一個對話框來提醒用戶。同步對話框
我注意到，如果有幾個對話框的時間已經過去，它們都會立即啓動。這導致僅顯示第一個對話框。當你點擊'解除'按鈕時，它會解除所有的對話框。
有沒有辦法讓每個盒子一次顯示一張而不是像這樣卡紙？
我讀到了使用「同步」，但它似乎只用於網絡。你能告訴我什麼是解決這個問題的最好方法嗎？
我的代碼：
package com.google.android.gcm.demo.app.Alerts;
import java.io.IOException;
import com.google.android.gcm.demo.app.DemoActivity;
import com.google.android.gcm.demo.app.PreferenceConnector;
import com.google.android.gcm.demo.app.R;
import com.google.android.gcm.demo.app.TabBarExample;
import com.google.android.gcm.demo.app.sqllite.DatabaseSqlite;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.Ringtone;
import android.media.RingtoneManager;
import android.net.Uri;
import android.os.Bundle;
import android.os.Vibrator;
public class AlertDialogActivity extends Activity {
MediaPlayer player = new MediaPlayer();
Bundle bundle;
Vibrator vibrate;
DatabaseSqlite entry = new DatabaseSqlite(AlertDialogActivity.this);
int vibrateState;
int soundState;
AlertDialog.Builder builder;
Intent intent;
int idInteger;
int alertDismissed = 1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
bundle = getIntent().getExtras();
String name = bundle.getString("name");
String id = bundle.getString("id");
idInteger = Integer.parseInt(id);
intent = new Intent(AlertDialogActivity.this, TabBarExample.class);
sound();
vibrate();
entry.open();
entry.updateAlertDismissedState(idInteger, alertDismissed);
String text = entry.getMinutesForOneShot(idInteger);
entry.close();
String textForDisplay = "In " + text + " Minutes";
builder = new AlertDialog.Builder(this);
builder.setMessage(textForDisplay)
.setTitle(name)
.setCancelable(false)
.setNegativeButton("Dismiss",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int id) {
soundState = PreferenceConnector.readInteger(
AlertDialogActivity.this,
PreferenceConnector.SOUND_ON_OFF, 0);
if (soundState == 0) {
player.pause();
player.release();
}
vibrateState = PreferenceConnector.readInteger(
AlertDialogActivity.this,
PreferenceConnector.VIBRATE_ON_OFF, 0);
if (vibrateState == 0) {
vibrate.cancel();
}
startActivity(intent);
}
});
AlertDialog alert = builder.create();
alert.show();
}
@Override
protected void onDestroy() {
super.onDestroy();
}
private void sound() {
soundState = PreferenceConnector.readInteger(AlertDialogActivity.this,
PreferenceConnector.SOUND_ON_OFF, 0);
if (soundState == 0) {
// play sound
AssetFileDescriptor afd = this.getResources().openRawResourceFd(
R.raw.alarm_clock);
try {
player.setDataSource(afd.getFileDescriptor(),
afd.getStartOffset(), afd.getLength());
afd.close();
player.setAudioStreamType(AudioManager.STREAM_ALARM);
player.setLooping(true);
player.prepare();
player.start();
} catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IllegalStateException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
} else {
}
}
private void vibrate() {
vibrateState = PreferenceConnector
.readInteger(AlertDialogActivity.this,
PreferenceConnector.VIBRATE_ON_OFF, 0);
if (vibrateState == 0) {
// Get instance of Vibrator from current Context
vibrate = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
// Start immediately
// Vibrate for 200 milliseconds
// Sleep for 500 milliseconds
long[] pattern = { 0, 200, 500 };
// The "0" means to repeat the pattern starting at the beginning
// CUIDADO: If you start at the wrong index (e.g., 1) then your
// pattern will be off --
// You will vibrate for your pause times and pause for your vibrate
// times !
vibrate.vibrate(pattern, 0);
} else {
}
}
}