Utilisation d'un chronomètre dans un fragment
Bonsoir,
Je suis débutant en java sous android et je rencontre une difficulté lorsque je souhaite mettre en place un chronomètre sur un "slide" (Fragment). Actuellement, lorsque je lance mon application et que je clique pour aller dans cette slide, un message m'indique que mon application s'est arrêtée brutalement. Mon LogCat m'indique que le soucis vient de la ligne 29 mais je n'arrive pas à identifier l'erreur.
Mon code:
Code:
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| package com.tutos;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.os.SystemClock;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Button;
import android.widget.Chronometer;
import android.app.Activity;
/*import android.view.Menu;*/
public class InformationCourse extends Fragment{
Chronometer focus;
Button start, stop, restart;
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
start = (Button) getActivity().findViewById(R.id.button1);
stop = (Button) getActivity().findViewById(R.id.button2);
restart = (Button) getActivity().findViewById(R.id.button3);
focus = (Chronometer) getActivity().findViewById(R.id.chronometer1);
start.setOnClickListener(new View.OnClickListener() { // L'erreur est située ici
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
focus.start();
}
});
stop.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
focus.stop();
}
});
restart.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
focus.setBase(SystemClock.elapsedRealtime());
}
});
return inflater.inflate(R.layout.information_course,container, false);
}
} |
L'erreur dans LogCat :
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|
11-29 13:09:39.163 1855-1855/com.tutos E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: com.tutos, PID: 1855
java.lang.NullPointerException
at com.tutos.InformationCourse.onCreateView(InformationCourse.java:29)
at android.support.v4.app.Fragment.performCreateView(Fragment.java:1478)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:927)
at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1104)
at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1460)
at android.support.v4.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:472)
at android.support.v4.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:141)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1068)
at android.support.v4.view.ViewPager.populate(ViewPager.java:914)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1436)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at android.view.View.measure(View.java:16497)
at android.widget.LinearLayout.measureVertical(LinearLayout.java:847)
at android.widget.LinearLayout.onMeasure(LinearLayout.java:588)
at android.view.View.measure(View.java:16497)
at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
at android.view.View.measure(View.java:16497)
at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
at android.view.Choreographer.doCallbacks(Choreographer.java:574)
at android.view.Choreographer.doFrame(Choreographer.java:544)
at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
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) |
Merci d'avance de votre aide :)
Bonne soirée
Cordialement
Shin'
