Question

我正在尝试使用AlarmManager，BrodcastReceiver和AlarmManager.AlarmClockInfo创建一个在给定时间设置闹钟的应用程序来设置闹钟。但每次我运行它时，都会收到此错误消息。

总结一下，我想在20秒钟内响闹。这是我的MainActivity代码（用ButterKnife注入的视图）：

@InjectView(R.id.alarmTimePicker) TimePicker timePicker;
@InjectView(R.id.alarmText) TextView tv_texto;
@InjectView(R.id.alarmToggle) ToggleButton tg_toggle;
private AlarmManager alarmManager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ButterKnife.inject(this);
    alarmManager = (AlarmManager)getSystemService(ALARM_SERVICE);
}

public void onToggleClicked (View view){
    if (tg_toggle.isChecked()){
        Calendar calendar = Calendar.getInstance();
        calendar.add(Calendar.SECOND, 20);

        Intent intent = new Intent(this, AlarmReceiver.class);
        intent.putExtra("warning", "The alarm is ringing.");

        pendingIntent = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);

        AlarmManager.AlarmClockInfo alarmClockInfo = new AlarmManager.AlarmClockInfo(calendar.getTimeInMillis(), pendingIntent);
        alarmManager.setAlarmClock(alarmClockInfo, pendingIntent);
    }else
        //Do other stuff
}

然后有一个AlarmReceiver类在清单中将BradcastReceiver及其声明扩展为<receiver>。但错误是指行AlarmManager.AlarmClockInfo alarmClockInfo = new AlarmManager.AlarmClockInfo(calendar.getTimeInMillis(), pendingIntent);。

这是完整的错误日志：

java.lang.IllegalStateException: Could not execute method of the activity
            at android.view.View$1.onClick(View.java:3823)
            at android.view.View.performClick(View.java:4438)
            at android.widget.CompoundButton.performClick(CompoundButton.java:100)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.reflect.InvocationTargetException
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3818)
            at android.view.View.performClick(View.java:4438)
            at android.widget.CompoundButton.performClick(CompoundButton.java:100)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NoClassDefFoundError: android.app.AlarmManager$AlarmClockInfo
            at examen.melerogomez.clock.MainActivity.onToggleClicked(MainActivity.java:64)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at android.view.View$1.onClick(View.java:3818)
            at android.view.View.performClick(View.java:4438)
            at android.widget.CompoundButton.performClick(CompoundButton.java:100)
            at android.view.View$PerformClick.run(View.java:18422)
            at android.os.Handler.handleCallback(Handler.java:733)
            at android.os.Handler.dispatchMessage(Handler.java:95)
            at android.os.Looper.loop(Looper.java:136)
            at android.app.ActivityThread.main(ActivityThread.java:5017)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
            at dalvik.system.NativeStart.main(Native Method)

Answer 1

问题是在API 21中添加了AlarmManager.AlarmClockInfo类，我试图在API 19和minsdkversion 15的模拟器中运行它。

为什么我会得到java.lang.noclassdeffounderror：android.app.alarmmanager $ alarmclockinfo？

1 个答案: