public class Jav extends Fragment implements View.OnClickListener {
public static Jav newInstance(){
Jav fragment = new Jav();
return fragment;
}
Button bleft,bshowanswer,bright;
TextView tv_xx,tv_yy,tvquestion,tvanswers;
String[] greque;
String[] greans;
int index;
public Jav() {
}
public void onActivityCreated(Bundle savedInstanceState){
super.onCreate(savedInstanceState);
super.onActivityCreated(savedInstanceState);
index = 0;
greque = getResources().getStringArray(R.array.greques);
greans = getResources().getStringArray(R.array.greanse);
bleft.setOnClickListener(this);
bright.setOnClickListener(this);
bshowanswer.setOnClickListener(this);
tvquestion.setText(greque[index]);
tvanswers.setText("press a button for ans");
tv_xx.setText(String.valueOf(index+1));
tv_yy.setText(String.valueOf(greque.length));
}
View v;
public void onClick(View v) {
bleft = (Button) v.findViewById(R.id.bleft);
bright = (Button) v.findViewById(R.id.bright);
bshowanswer = (Button) v.findViewById(R.id.bshowanswer);
tvquestion = (TextView) v.findViewById(R.id.tvquestion);
tvanswers =(TextView) v.findViewById(R.id.tvanswers);
tv_xx = (TextView) v.findViewById(R.id.tv_xx);
tv_yy = (TextView) v.findViewById(R.id.tv_yy);
switch (v.getId()){
case R.id.bleft:
break;
case R.id.bshowanswer:
break;
case R.id.bright:
break;
}
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.java, container,
false);
return rootView;
}
@Override
public void onAttach(Activity activity) {
super.onAttach(activity);
((MainActivity) activity).onSectionAttached(2);
}
}
- 當我運行我的程序我的Android應用程序停止,登錄貓圖所示
它的某些部分的工作,但是當我點擊它它顯示錯誤。我在導航抽屜程序logcat的實現,這是如下所示:Android應用程序開發:不幸的是應用程序已停止
04-02 02:23:30.880 1454年至1454年/ example.ashok.appnav d/AndroidRuntime:關閉VM 04-02 2點23: 30.880 1454-1454/example.ashok.appnav W/dalvikvm:threadid = 1:以未捕獲異常退出的線程(group = 0xa6194908) 04-02 02:23:30.880 1454-1454/example.ashok.appnav E/AndroidRuntime:致命異常:主 顯示java.lang.NullPointerException 在example.ashok.appnav.Jav.onActivityCreated(Jav.java:31) 在android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1794) 在android.support.v4.app.FragmentManagerImpl.moveToState(FragmentM anager.java:977) 在android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1136) 在android.support.v4.app.BackStackRecord.run(BackStackRecord.java:739) 在機器人。 android.support.v4.app.FragmentManagerImpl上的support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1499) :725) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5041 ) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(M ethod.java:511) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:793) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) at dalvik.system.NativeStart.main(本機方法)
- 請解決我的問題。我使用Android工作室
什麼是31號線 – virendrao 2015-04-02 04:32:30