編輯:任何人在這個絆倒可能想知道,重啓後發出警報,你需要註冊它在清單,而不是運行時。重新啓動後Android報警不會啓動:
我有以下類我設計從Here使用指南:
public class MainActivity extends Activity {
private AlarmManager alarmMgr;
private PendingIntent alarmIntent;
BroadcastReceiver br;
TextView t;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
setup();
t = (TextView)findViewById(R.id.textView1);
ComponentName receiver = new ComponentName(getApplicationContext(), SampleBootReceiver.class);
PackageManager pm = getApplicationContext().getPackageManager();
pm.setComponentEnabledSetting(receiver,
PackageManager.COMPONENT_ENABLED_STATE_ENABLED,
PackageManager.DONT_KILL_APP);
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 10);
calendar.set(Calendar.MINUTE, 22); // Particular minute
calendar.set(Calendar.SECOND, 0);
alarmMgr = (AlarmManager)getApplicationContext().getSystemService(Context.ALARM_SERVICE);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
1000*60*60*24, alarmIntent);
}
public void setup() {
br = new BroadcastReceiver() {
@Override
public void onReceive(Context c, Intent i) {
Toast.makeText(c, "Rise and Shine!", Toast.LENGTH_LONG).show();
//Invoke the service here Put the wake lock and initiate bind service
t.setText("Hello Alarm set");
}
};
registerReceiver(br, new IntentFilter("com.testrtc"));
alarmIntent = PendingIntent.getBroadcast(this, 0, new Intent("com.testrtc"),
0);
alarmMgr = (AlarmManager)(this.getSystemService(Context.ALARM_SERVICE));
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
我有一個SampleBootReceiver類是:
public class SampleBootReceiver extends BroadcastReceiver {
private AlarmManager alarmMgr;
private PendingIntent alarmIntent;
BroadcastReceiver br;
TextView t;
@Override
public void onReceive(Context context, Intent intent) {
if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
Toast.makeText(context, "Hello from Bootloader", 10000).show();
Calendar calendar = Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.set(Calendar.HOUR_OF_DAY, 10);
calendar.set(Calendar.MINUTE, 22); // Particular minute
calendar.set(Calendar.SECOND, 0);
alarmMgr = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
alarmMgr.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
1000*60*60*24, alarmIntent);
}
}
}
這裏是我的清單:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.testrtc"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.WAKE_LOCK" />
<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.testrtc.MainActivity"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver
android:name=".SampleBootReceiver"
android:enabled="false" >
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" >
</action>
</intent-filter>
</receiver>
</application>
</manifest>
鬧鐘工作正常在重新啓動之前,重新啓動後,我也從BootReceiver類獲得Toast消息。但警報不會重置。這裏我想澄清一點,Docs聲明警報不會被重置,除非應用程序至少由用戶啓動一次:Set the RECEIVE_BOOT_COMPLETED permission in your application's manifest. This allows your app to receive the ACTION_BOOT_COMPLETED that is broadcast after the system finishes booting (this only works if the app has already been launched by the user at least once):
此聲明的內容是什麼?如果用戶必須重新啓動應用程序,無論如何,onCreate將被調用並且鬧鐘將被重新設置。或者這個聲明是否意味着在整個生命週期中,應用程序必須至少運行一次電話?
對於出現此問題的所有API級別..? – SilentKiller
我沒有在API級別19上進行測試,但是這個問題在Jelly Bean中。 – Skynet
那件事我以爲我曾經在JellyBean面臨同樣的事情,我發現BroadcastListener在啓動後不能自動工作在4.0以上,所以我創建了一個服務來運行我的廣播。 – SilentKiller