Question

我有一个警报应用程序，我注意到当我更新/重新安装应用程序时，待处理的警报意图被删除。因此，我需要一种方法来检测应用程序是否已更新，而无需用户启动应用程序。

我使用广播检测手机重新启动以重新注册我的闹钟，但不确定如何检测应用更新的时间。

例如，有没有办法在安装应用程序的情况下尽快运行服务，而无需用户打开应用程序？

我检查了这些，但似乎不可能。但想知道是否有更新的Android版本的更新：

Start a service automatically when app installed to device

How to start a Service when .apk is Installed for the first time

谢谢。

Answer 1

不是设置闹钟，而是专门为此目的注册了一个Manifest注册的BroadcastReceiver。它可以监听android.intent.action.PACKAGE_REPLACED（注意：此常量中缺少单词action）或android.intent.action.MY_PACKAGE_REPLACED

<receiver android:name="...">
    <intent-filter>
        <action android:name="android.intent.action.PACKAGE_REPLACED"></action>
        <data android:scheme="package" android:path="com.your.package" /> 
    </intent-filter>
</receiver>

重新安装后，您的接收器将收到此消息，您将能够启动活动

Answer 2

试试这个：

首先，让我们定义将由警报执行的BroadcastReceiver并启动我们的IntentService：

public class MyAlarmReceiver extends BroadcastReceiver {
public static final int REQUEST_CODE = 12345;
public static final String ACTION = "com.codepath.example.servicesdemo.alarm";

 // Triggered by the Alarm periodically (starts the service to run task)
 @Override
 public void onReceive(Context context, Intent intent) {
Intent i = new Intent(context, MyTestService.class);
i.putExtra("foo", "bar");
context.startService(i);
 }
 }

接下来，让我们在AndroidManifest.xml中注册我们的IntentService和MyAlarmReceiver。

<receiver
android:name=".MyAlarmReceiver"
android:process=":remote" >
</receiver>

<service
android:name=".MyTestService"
android:exported="false" />

java活动

public class MainActivity extends Activity {
@Override
 protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
scheduleAlarm();
 }

// Setup a recurring alarm every half hour
 public void scheduleAlarm() {
 // Construct an intent that will execute the AlarmReceiver
 Intent intent = new Intent(getApplicationContext(), MyAlarmReceiver.class);
 // Create a PendingIntent to be triggered when the alarm goes off
 final PendingIntent pIntent = PendingIntent.getBroadcast(this, 
  MyAlarmReceiver.REQUEST_CODE,
    intent, PendingIntent.FLAG_UPDATE_CURRENT);
// Setup periodic alarm every every half hour from this point onwards
long firstMillis = System.currentTimeMillis(); // alarm is set right away
AlarmManager alarm = (AlarmManager) 
 this.getSystemService(Context.ALARM_SERVICE);
// First parameter is the type: ELAPSED_REALTIME, ELAPSED_REALTIME_WAKEUP, 
 RTC_WAKEUP
// Interval can be INTERVAL_FIFTEEN_MINUTES, INTERVAL_HALF_HOUR, 
 INTERVAL_HOUR, INTERVAL_DAY
alarm.setInexactRepeating(AlarmManager.RTC_WAKEUP, firstMillis,
    AlarmManager.INTERVAL_HALF_HOUR, pIntent);
   }
   }

设置闹钟后，如果我们想取消这样的闹钟：

public void cancelAlarm() {
Intent intent = new Intent(getApplicationContext(), MyAlarmReceiver.class);
final PendingIntent pIntent = PendingIntent.getBroadcast(this, MyAlarmReceiver.REQUEST_CODE,
   intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager alarm = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
alarm.cancel(pIntent);
 }

并检查您的清单权限：

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<uses-permission android:name="android.permission.WAKE_LOCK" />

我不确定，但请检查我的帮助

如何在更新应用程序后在后台运行服务

2 个答案: