适配器getView 方法报了空指针，搞不好这个，晚上睡不着了
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder=null;
if (convertView==null) {
convertView=inflater.inflate(R.layout.item_gridview, parent, false);
holder=new ViewHolder();
holder.imgView=(ImageView) findViewById(R.id.id_imgview);
holder.imgBtn=(ImageButton) findViewById(R.id.id_imgbtn);
convertView.setTag(holder);
}else{
holder=(ViewHolder) convertView.getTag();
}
holder.imgView.setImageResource(R.drawable.ic_dialog_alert);
holder.imgBtn.setImageResource(R.drawable.btn_check_on_disabled_holo_light);
ImageLoader.getImageLoader(3,Type.LIFO).loadImage(dirPath+"/"+imgPathList.get(position), holder.imgView);
return convertView;
}
class ViewHolder{
ImageView imgView;
ImageButton imgBtn;
}
09-07 10:47:40.062: E/AndroidRuntime(23353): FATAL EXCEPTION: main
09-07 10:47:40.062: E/AndroidRuntime(23353): Process: com.example.imooc_imageloader, PID: 23353
09-07 10:47:40.062: E/AndroidRuntime(23353): java.lang.NullPointerException
09-07 10:47:40.062: E/AndroidRuntime(23353): at com.example.imooc_imageloader.MainActivity$ImageAdapter.getView(MainActivity.java:100)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.widget.AbsListView.obtainView(AbsListView.java:2263)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.widget.GridView.onMeasure(GridView.java:1044)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.View.measure(View.java:16497)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.widget.RelativeLayout.measureChildHorizontal(RelativeLayout.java:719)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.widget.RelativeLayout.onMeasure(RelativeLayout.java:455)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.View.measure(View.java:16497)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.View.measure(View.java:16497)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
09-07 10:47:40.062: E/AndroidRuntime(23353): at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:327)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.View.measure(View.java:16497)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5125)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.widget.FrameLayout.onMeasure(FrameLayout.java:310)
09-07 10:47:40.062: E/AndroidRuntime(23353): at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2291)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.View.measure(View.java:16497)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:1916)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1113)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1295)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1000)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5670)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.Choreographer$CallbackRecord.run(Choreographer.java:761)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.Choreographer.doCallbacks(Choreographer.java:574)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.Choreographer.doFrame(Choreographer.java:544)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:747)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.os.Handler.handleCallback(Handler.java:733)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.os.Handler.dispatchMessage(Handler.java:95)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.os.Looper.loop(Looper.java:136)
09-07 10:47:40.062: E/AndroidRuntime(23353): at android.app.ActivityThread.main(ActivityThread.java:5017)
09-07 10:47:40.062: E/AndroidRuntime(23353): at java.lang.reflect.Method.invokeNative(Native Method)
09-07 10:47:40.062: E/AndroidRuntime(23353): at java.lang.reflect.Method.invoke(Method.java:515)
09-07 10:47:40.062: E/AndroidRuntime(23353): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:779)
09-07 10:47:40.062: E/AndroidRuntime(23353): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:595)
09-07 10:47:40.062: E/AndroidRuntime(23353): at dalvik.system.NativeStart.main(Native Method)
