viewPage setAdapter 报空指针异常！please help me!我找半天都没找到错误

[life_+]

红色为报错位置
一、代码
public class Main_fragment extends BaseFragment {

private MyViewPage pager;
private ArrayList<Basepage> pages;

public View initView() {
View view = View.inflate((mactivity), R.layout.main_fragment, null);
pager = (MyViewPage) view.findViewById(R.id.vp_pager);
return view;
}


public void initData() {
pages = new ArrayList<Basepage>();
pages.add(new HomePage(mactivity));
pages.add(new NewsPage(mactivity));
pages.add(new ServerPage(mactivity));
pages.add(new GovServerPage(mactivity));
pages.add(new SettingPage(mactivity));
pager.setAdapter(new myAdapter());
}



class myAdapter extends PagerAdapter{

@Override
public int getCount() {
return pages.size();
}

@Override
public boolean isViewFromObject(View view, Object object) {
return view==object;
}
@Override
public Object instantiateItem(ViewGroup container, int position) {
Basepage page = pages.get(position);
page.initData();
View view = page.mlayout;

container.addView(view);
return view;
}
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
}
}
}



public abstract class BaseFragment extends Fragment{
public Activity mactivity;
@Override
public void onCreate(Bundle arg0) {
super.onCreate(arg0);
mactivity = getActivity();
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View v=initView();

return v;
}
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
initData();
}

public abstract void initData();

public abstract View initView();

}


2、logcat

04-23 04:55:48.442: E/AndroidRuntime(2279): FATAL EXCEPTION: main
04-23 04:55:48.442: E/AndroidRuntime(2279): java.lang.RuntimeException: Unable to start activity ComponentInfo{org.hfzy.Beijing/org.hfzy.Beijing.MainActivity}: java.lang.NullPointerException
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2059)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2084)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.ActivityThread.access$600(ActivityThread.java:130)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1195)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.os.Handler.dispatchMessage(Handler.java:99)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.os.Looper.loop(Looper.java:137)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.ActivityThread.main(ActivityThread.java:4745)
04-23 04:55:48.442: E/AndroidRuntime(2279): at java.lang.reflect.Method.invokeNative(Native Method)
04-23 04:55:48.442: E/AndroidRuntime(2279): at java.lang.reflect.Method.invoke(Method.java:511)
04-23 04:55:48.442: E/AndroidRuntime(2279): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786)
04-23 04:55:48.442: E/AndroidRuntime(2279): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
04-23 04:55:48.442: E/AndroidRuntime(2279): at dalvik.system.NativeStart.main(Native Method)
04-23 04:55:48.442: E/AndroidRuntime(2279): Caused by: java.lang.NullPointerException
04-23 04:55:48.442: E/AndroidRuntime(2279): at org.hfzy.fragment.Main_fragment.initData(Main_fragment.java:40)
04-23 04:55:48.442: E/AndroidRuntime(2279): at org.hfzy.fragment.BaseFragment.onActivityCreated(BaseFragment.java:28)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.support.v4.app.Fragment.performActivityCreated(Fragment.java:1468)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:931)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.support.v4.app.FragmentManagerImpl.moveToState(FragmentManager.java:1088)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.support.v4.app.BackStackRecord.run(BackStackRecord.java:682)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.support.v4.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1444)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.support.v4.app.FragmentActivity.onStart(FragmentActivity.java:551)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1163)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.Activity.performStart(Activity.java:5018)
04-23 04:55:48.442: E/AndroidRuntime(2279): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2032)
04-23 04:55:48.442: E/AndroidRuntime(2279): ... 11 more

[我就是Yellow黄]

initData（）中40行错误，应该是pager没被find出来，看看布局中有没有这个id吧

[life_+]

find有这个view

[YXTS122]

把这个MyViewPage.java，还有布局文件都发上来看看。。。。

[life_+]

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" > <org.hfzy.view.MyViewPage android:id="@+id/vp_pager" android:layout_width="match_parent" android:layout_height="wrap_content" /> <RelativeLayout android:id="@+id/rl_point" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_centerHorizontal="true" android:layout_marginBottom="30dp" > <LinearLayout android:orientation="horizontal" android:id="@+id/ll_container" android:layout_width="wrap_content" android:layout_height="wrap_content" ></LinearLayout> <ImageView android:id="@+id/iv_red_point" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="@drawable/point_red" /> </RelativeLayout> <Button android:id="@+id/btn_start" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/rl_point" android:layout_centerHorizontal="true" android:layout_marginBottom="20dp" android:background="@drawable/btnstart" android:padding="10dp" android:text="开始体验 " android:textColor="@color/btnstart_fontcolor" /> </RelativeLayout> package org.hfzy.view; import android.content.Context; import android.support.v4.view.ViewPager; import android.util.AttributeSet; import android.view.MotionEvent; public class MyViewPage extends ViewPager { public MyViewPage(Context context, AttributeSet attrs) { super(context, attrs); } public MyViewPage(Context context) { super(context); } @Override public boolean onTouchEvent(MotionEvent ev) { return true; } }

[有生之莲萨摩耶]

你看看你的引用的layout文件有没有错，再看看绑定的id有没有问题； 问题是在Setting page 和 setadapter上，有没有存在你在你的setText的控件不存在该Activity的布局中 如果都Ok的话

[life_+]

谢谢大家，是不小心find错了控件，