I have an activity that implements chronometer inside the Notification in my notification there is a button to stop the chronometer.The click event for button is working successfully but when i call method stopButtonClick() to stop chronometer but i am getting error.
public class Chronometers extends Activity {
private long timeWhenStopped = 0;
private boolean stopClicked;
private Chronometer chs;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
chs=(Chronometer)this.findViewById(R.id.ch);
NotificationManager nm = (NotificationManager) this.getSystemService(Context.NOTIFICATION_SERVICE);
NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
builder.setSmallIcon(R.drawable.icas);
RemoteViews remoteViews = new RemoteViews(BuildConfig.APPLICATION_ID, R.layout.widget);
remoteViews.setChronometer(R.id.ch, SystemClock.elapsedRealtime(), null, true);
builder.setContent(remoteViews);
Intent buttonsIntent = new Intent(this,StartupReceiver.class);
buttonsIntent.putExtra("do_action","play");
PendingIntent as21 = PendingIntent.getBroadcast(this, 0, buttonsIntent, 0);
remoteViews.setOnClickPendingIntent(R.id.button3, as21);
nm.notify(0, builder.build());
}
private void showElapsedTime() {
long elapsedMillis = SystemClock.elapsedRealtime() - chs.getBase();
}
// the method for when we press the 'start' button
public void startButtonClick() {
int stoppedMilliseconds = 0;
String chronoText = chs.getText().toString();
String array[] = chronoText.split(":");
if (array.length == 2) {
stoppedMilliseconds = Integer.parseInt(array[0]) * 60 * 1000
+ Integer.parseInt(array[1]) * 1000;
} else if (array.length == 3) {
stoppedMilliseconds = Integer.parseInt(array[0]) * 60 * 60 * 1000
+ Integer.parseInt(array[1]) * 60 * 1000
+ Integer.parseInt(array[2]) * 1000;
}
chs.setBase(SystemClock.elapsedRealtime() - stoppedMilliseconds);
chs.start();
}
// the method for when we press the 'stop' button
public void stopButtonClick() {
if (!stopClicked) {
chs.stop();
showElapsedTime();
}
}
public static class StartupReceiver extends BroadcastReceiver {
Context ctx;
@Override
public void onReceive(Context ctx, Intent intent) {
// TODO Auto-generated method stub
this.ctx = ctx;
Toast.makeText(ctx,"mak pro cina",Toast.LENGTH_SHORT).show();
Intent i = new Intent(ctx,NotifyActivityHandler.class);
i.putExtra("do_action","play");
i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
ctx.startActivity(i);
System.out.println("controll will be here ");
}
}
public static class NotifyActivityHandler extends Activity {
String action;
int k = 0;
protected void onCreate( Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
Intent abs=getIntent();
action = abs.getStringExtra("do_action");
System.out.println(action);
if (action.equals("play"))
{
System.out.println("patrpooooooooooooo");
new Chronometers().stopButtonClick();
}
else
{
System.out.println("mahitreee");
}
Toast.makeText(this,"jasgh",Toast.LENGTH_SHORT).show();
}
}
}
The error in the logcat is
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.home.outdoor/com.example.home.outdoor.Chronometers$NotifyActivityHandler}: java.lang.NullPointerException: Attempt to invoke virtual method 'void android.widget.Chronometer.stop()' on a null object reference
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2326)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
at android.app.ActivityThread.access$800(ActivityThread.java:147)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1281)
at android.os.Handler.dispatchMessage(Handler.java:102)
at android.os.Looper.loop(Looper.java:135)
at android.app.ActivityThread.main(ActivityThread.java:5264)
at java.lang.reflect.Method.invoke(Native Method)
at java.lang.reflect.Method.invoke(Method.java:372)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:900)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:695)
I have created object of Chronometer but still it gives this error.Please help me out.Thanks in advance!!
