以下是我的完整代码
public class set_tazkeer extends AppCompatActivity implements View.OnClickListener {
Toolbar toolbar;
Button btnS, btnM;
Calendar mCalen,current;
int hourOfDay, minute, ampm,timePickerInput;
static final int Time_DIALOG_ID = 0;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_set_tazkeer);
toolbar = (Toolbar) findViewById(R.id.toolbar);
setSupportActionBar(toolbar);
getSupportActionBar().setDisplayHomeAsUpEnabled(true);
getSupportActionBar().setHomeButtonEnabled(true);
toolbar.setNavigationOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
onBackPressed();
}
});
btnS = (Button) findViewById(R.id.set_sabah);
btnM = (Button) findViewById(R.id.set_masaa);
mCalen = Calendar.getInstance();
hourOfDay = mCalen.get(Calendar.HOUR_OF_DAY);
minute = mCalen.get(Calendar.MINUTE);
ampm = mCalen.get(Calendar.AM_PM);
btnS.setOnClickListener(this);
btnM.setOnClickListener(this);
}
@Override
@Deprecated
protected Dialog onCreateDialog(int id) {
switch (id) {
case Time_DIALOG_ID:
return new TimePickerDialog(this, TimePickerListener, hourOfDay, minute, false);
}
return null;
}
private TimePickerDialog.OnTimeSetListener TimePickerListener =
new TimePickerDialog.OnTimeSetListener() {
// while dialog box is closed, below method is called.
public void onTimeSet(TimePicker view, int hour, int minute) {
switch (timePickerInput) {
case R.id.set_sabah:
mCalen.set(Calendar.HOUR_OF_DAY, hour);
mCalen.set(Calendar.MINUTE, minute);
int hour12format = mCalen.get(Calendar.HOUR);
hourOfDay = mCalen.get(Calendar.HOUR_OF_DAY);
minute = mCalen.get(Calendar.MINUTE);
ampm = mCalen.get(Calendar.AM_PM);
String ampmStr = (ampm == 0) ? "AM" : "PM";
// Set the Time String in Button
btnS.setText(hour12format + " : " + minute + " / " + ampmStr);
break;
case R.id.set_masaa:
mCalen.set(Calendar.HOUR_OF_DAY, hour);
mCalen.set(Calendar.MINUTE, minute);
int hour12format2 = mCalen.get(Calendar.HOUR);
hourOfDay = mCalen.get(Calendar.HOUR_OF_DAY);
minute = mCalen.get(Calendar.MINUTE);
ampm = mCalen.get(Calendar.AM_PM);
String ampmStr2 = (ampm == 0) ? "AM" : "PM";
btnM.setText(hour12format2 + " : " + minute + " / " + ampmStr2);
break;
}
if (mCalen.compareTo(current) <= 0) {
//The set Date/Time already passed
Toast.makeText(getApplicationContext(),
"Invalid Date/Time",
Toast.LENGTH_LONG).show();
} else {
setAlarm(mCalen);
}
}
};
private void setAlarm(Calendar targetmCalen) {
Intent intent = new Intent(getBaseContext(), AlarmReceiver.class);
PendingIntent pendingIntent = PendingIntent.getBroadcast(getBaseContext(), 0, intent, 0);
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE);
alarmManager.set(AlarmManager.RTC_WAKEUP, targetmCalen.getTimeInMillis(), pendingIntent);
}
@Override
public void onClick(View v) {
timePickerInput = v.getId();
showDialog(Time_DIALOG_ID);
}
}
和AlarmReceiver
public class AlarmReceiver extends BroadcastReceiver {
private static final int MY_NOTIFICATION_ID = 0;
NotificationManager notificationManager;
Notification myNotification;
@Override
public void onReceive(Context context, Intent intent) {
Toast.makeText(context, "Time is set", Toast.LENGTH_LONG).show();
Intent myIntent = new Intent(context, MainActivity.class);
PendingIntent pendingIntent = PendingIntent.getActivity(
context,
0,
myIntent,
PendingIntent.FLAG_UPDATE_CURRENT);
myNotification = new NotificationCompat.Builder(context)
.setContentTitle("الاذكار")
.setContentText("حان وقت الاذكار")
.setWhen(System.currentTimeMillis())
.setContentIntent(pendingIntent)
.setAutoCancel(true)
.setSmallIcon(R.drawable.icon)
.build();
notificationManager =
(NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
notificationManager.notify(MY_NOTIFICATION_ID, myNotification);
}
}
当我在TimePicker对话框中选择时间并按下确定＆gt;时，我不知道错误在哪里。 ＆＃34; Unfortunately the app has stopped＆＃34;
下面是logcat
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: FATAL EXCEPTION: main
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: Process: mydesign.abdel_quddous.azkaralyoum, PID: 28370
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: java.lang.NullPointerException: anotherCalendar == null
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at java.util.Calendar.compareTo(Calendar.java:1260)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at abdel_quddous.mydesign.azkaralyoum.set_tazkeer$2.onTimeSet(set_tazkeer.java:102)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at android.app.TimePickerDialog.onClick(TimePickerDialog.java:133)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at com.android.internal.app.AlertController$ButtonHandler.handleMessage(AlertController.java:162)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at android.os.Handler.dispatchMessage(Handler.java:102)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at android.os.Looper.loop(Looper.java:211)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at android.app.ActivityThread.main(ActivityThread.java:5389)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at java.lang.reflect.Method.invoke(Native Method)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at java.lang.reflect.Method.invoke(Method.java:372)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1020)
11-09 12:02:00.894 28370-28370/mydesign.abdel_quddous.azkaralyoum E/AndroidRuntime: at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:815)