在过去的一个月中,我一直在尝试慢慢学习Android API。我已经阅读了文档,查看了示例,但似乎无法弄清楚我在做什么。基本上,应用在启动后的1分钟内就会设置闹钟。
我当前遇到的问题是设置警报后,没有收到。这是我所拥有的:
SetAlarmActivity.java
public class SetAlarmActivity extends AppCompatActivity {
private final String TAG = "AlarmTest";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_set_alarm);
Calendar c = Calendar.getInstance();
c.add(Calendar.MINUTE, 1);
Log.d(TAG, "Alarm time is " + c.getTime());
// set the intent to launch our SetAlarmActivity
Intent alarmIntent = new Intent(SetAlarmActivity.this, SetAlarmActivity.class);
// retrieve a PendingIntent to perform a Broadcast
PendingIntent pendingAlarmIntent = PendingIntent.getBroadcast(SetAlarmActivity.this, 0, alarmIntent, 0);
// grab the Alarm Service and tell it to call our Intent at the set time
AlarmManager alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT) {
alarmManager.setExact(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingAlarmIntent);
}else{
alarmManager.set(AlarmManager.RTC_WAKEUP, c.getTimeInMillis(), pendingAlarmIntent);
}
}
}
AlarmReceiver.java
public class AlarmReceiver extends WakefulBroadcastReceiver {
private final String TAG = "AlarmTest";
@Override
public void onReceive(Context context, Intent intent){
Log.d(TAG, "Received broadcast!");
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="bz.bdu.alarmtest" >
<uses-permission android:name="android.permission.WAKE_LOCK" />
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme" >
<activity android:name=".SetAlarmActivity" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".AlarmReceiver" />
</application>
</manifest>
最佳答案
您必须在Current activity
和receiver
类之间创建意图。像这样更改您的代码。
Intent intent = new Intent(SetAlarmActivity.this, AlarmReceiver.class);