BroadcastReceiver 和 AlarmManager Android [英] BroadcastReceiver and AlarmManager Android
本文介绍了BroadcastReceiver 和 AlarmManager Android的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我正在尝试使用带有 BroadcastReceiver 的警报管理器.我尝试使用 教程:系统服务和 BroadcastReceiver 中给出的示例.但是当我在时间结束后运行示例时,吐司没有出现.代码如下:
I am trying to use an alarm manager with BroadcastReceiver. I try to use the example given in Tutorial: System Services and BroadcastReceiver . but when I run the example after the end of the time the toast doesn't show up. the code is below:
我的主要活动:
public class AlarmActivity extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_alarm);
}
public void startAlert(View view) {
EditText text = (EditText) findViewById(R.id.time);
int i = Integer.parseInt(text.getText().toString());
Intent intent = new Intent(this, MyBroadcastReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(this.getApplicationContext(), 234324243, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, System.currentTimeMillis()
+ (i * 1000), pendingIntent);
Toast.makeText(this, "Alarm set in " + i + " seconds",
Toast.LENGTH_LONG).show();
}
}
我的广播接收器:
public class MyBroadcastReceiver {
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Don't panic but your time is up!!!!.",
Toast.LENGTH_LONG).show();
// Vibrate the mobile phone
Vibrator vibrator = (Vibrator) context.getSystemService(Context.VIBRATOR_SERVICE);
vibrator.vibrate(2000);
}
}
我的主要布局:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<EditText
android:id="@+id/time"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:hint="Number of seconds"
android:inputType="numberDecimal" >
</EditText>
<Button
android:id="@+id/ok"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:onClick="startAlert"
android:text="Start Counter" >
</Button>
</LinearLayout>
和清单文件:
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.broadcastreceiver"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<uses-permission android:name="android.permission.VIBRATE" >
</uses-permission>
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name="com.example.broadcastreceiver.AlarmActivity"
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="com.example.android_alarm.MyBroadcastReceiver" >
</receiver>
</application>
</manifest>
推荐答案
接收器必须从 BroadcastReceiver 扩展
The receiver must extend from BroadcastReceiver
public class MyBroadcastReceiver extends BroadcastReceiver {
// ...
}
还要确保清单文件中的接收者名称正确.
Also be sure that receiver name in manifest file is correct.
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