Android Tablet (3.0) Out Of Memory

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Motorola Xoom os3.0.1

在 homeView里面，快速滑动ListView，会出现：out of memory

异常信息如下：

11-15 16:50:55.710: DEBUG/dalvikvm(15350): GC_FOR_ALLOC freed 15K, 1% free 45420K/45703K, paused 28ms
11-15 16:50:55.760: INFO/dalvikvm-heap(15350): Clamp target GC heap from 48.192MB to 48.000MB
11-15 16:50:55.760: DEBUG/dalvikvm(15350): GC_FOR_ALLOC freed <1K, 1% free 47202K/47495K, paused 28ms
11-15 16:50:55.900: INFO/dalvikvm-heap(15350): Clamp target GC heap from 49.680MB to 48.000MB
11-15 16:50:55.900: DEBUG/dalvikvm(15350): GC_FOR_ALLOC freed 24K, 1% free 48726K/49031K, paused 30ms
11-15 16:50:55.900: INFO/dalvikvm-heap(15350): Forcing collection of SoftReferences for 240016-byte allocation
11-15 16:50:55.940: INFO/dalvikvm-heap(15350): Clamp target GC heap from 49.679MB to 48.000MB
11-15 16:50:55.940: DEBUG/dalvikvm(15350): GC_BEFORE_OOM freed 11K, 1% free 48715K/49031K, paused 38ms
11-15 16:50:55.940: ERROR/dalvikvm-heap(15350): Out of memory on a 240016-byte allocation.
11-15 16:50:55.940: INFO/dalvikvm(15350): "main" prio=5 tid=1 RUNNABLE
11-15 16:50:55.940: INFO/dalvikvm(15350):   | group="main" sCount=0 dsCount=0 obj=0x401a9680 self=0x115d8
11-15 16:50:55.940: INFO/dalvikvm(15350):   | sysTid=15350 nice=0 sched=0/0 cgrp=default handle=-1342909328
11-15 16:50:55.940: INFO/dalvikvm(15350):   | schedstat=( 12147025000 1019800000 5640 ) utm=1046 stm=168 core=1
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.graphics.Bitmap.nativeCreate(Native Method)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.graphics.Bitmap.createBitmap(Bitmap.java:551)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.graphics.Bitmap.createBitmap(Bitmap.java:531)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.View.buildDrawingCache(View.java:8703)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.View.getDrawingCache(View.java:8557)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.drawChild(ViewGroup.java:2382)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2123)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.widget.AbsListView.dispatchDraw(AbsListView.java:2023)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.widget.ListView.dispatchDraw(ListView.java:3220)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.View.draw(View.java:9135)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.widget.AbsListView.draw(AbsListView.java:3264)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.drawChild(ViewGroup.java:2508)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2123)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.View.draw(View.java:9032)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.drawChild(ViewGroup.java:2508)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2123)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.drawChild(ViewGroup.java:2506)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2123)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.drawChild(ViewGroup.java:2506)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewGroup.dispatchDraw(ViewGroup.java:2123)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.View.draw(View.java:9032)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.widget.FrameLayout.draw(FrameLayout.java:419)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at com.android.internal.policy.impl.PhoneWindow$DecorView.draw(PhoneWindow.java:1910)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewRoot.draw(ViewRoot.java:1608)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewRoot.performTraversals(ViewRoot.java:1329)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.view.ViewRoot.handleMessage(ViewRoot.java:1944)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.os.Handler.dispatchMessage(Handler.java:99)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.os.Looper.loop(Looper.java:126)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at android.app.ActivityThread.main(ActivityThread.java:3997)
11-15 16:50:55.950: INFO/dalvikvm(15350):   at java.lang.reflect.Method.invokeNative(Native Method)
11-15 16:50:55.960: INFO/dalvikvm(15350):   at java.lang.reflect.Method.invoke(Method.java:491)
11-15 16:50:55.960: INFO/dalvikvm(15350):   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:841)
11-15 16:50:55.960: INFO/dalvikvm(15350):   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:599)
11-15 16:50:55.960: INFO/dalvikvm(15350):   at dalvik.system.NativeStart.main(Native Method)
11-15 16:50:55.990: INFO/dalvikvm-heap(15350): Clamp target GC heap from 49.678MB to 48.000MB

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发现问题可能出在： HomeActivity.java当中的adapter

/**
   * This is a class that used to as a adapter for ListView.
   */
   private static class GroupListAdapter extends ArrayAdapter<String>{
       public GroupListAdapter(Context context, List<String> list) {
           super(context, 0, list);
       }

       @Override
       public boolean isEnabled(int position) {
           //index didn't contain the ':'.
           if(getItem(position).indexOf(":")==-1){
               return false;
           }
           return super.isEnabled(position);
       }

       @Override
       public View getView(int position, View convertView, ViewGroup parent) {
           //Distinguish the index and data item of the List and give them the different layout.
           View view = convertView;
           ////index didn't contain the ':',and data contains.
           if(getItem(position).indexOf(":")==-1){
               view = LayoutInflater.from(getContext()).inflate(R.layout.problem_index_item, null);
               TextView dateView = (TextView) view.findViewById(R.id.problemIndexName);
               dateView.setText(getItem(position));
           }else{
               view = LayoutInflater.from(getContext()).inflate(R.layout.problem_list_item, null);
               TextView idView = (TextView) view.findViewById(R.id.problemId);
               idView.setText(getItem(position).substring(0,getItem(position).indexOf(":")));
               TextView titleView = (TextView) view.findViewById(R.id.problemName);
               titleView.setText(getItem(position).substring(getItem(position).indexOf(":")+1));
           }
           return view;
       }
   }

convertView没有重用！！！！不知道为什么，手机端没有这样的问题，而平板居然会有这样的问题

修改version1:

@Override
       public View getView(int position, View convertView, ViewGroup parent) {
           if(convertView != null){
               System.out.println("convertView != null....convertView");
           }
           //Distinguish the index and data item of the List and give them the different layout.
           View view = null;
           if(convertView == null){

               ////index didn't contain the ':',and data contains.
               if(getItem(position).indexOf(":")==-1){
                   //view = indexView;
                   view = LayoutInflater.from(getContext()).inflate(R.layout.problem_index_item, null);
                   view.setTag("IndexView");

                   TextView dateView = (TextView) view.findViewById(R.id.problemIndexName);
                   dateView.setText(getItem(position));
               }else{
                   //view = problemView;
                   view = LayoutInflater.from(getContext()).inflate(R.layout.problem_list_item, null);
                   view.setTag("ProblemView");

                   TextView idView = (TextView) view.findViewById(R.id.problemId);
                   idView.setText(getItem(position).substring(0,getItem(position).indexOf(":")));
                   TextView titleView = (TextView) view.findViewById(R.id.problemName);
                   titleView.setText(getItem(position).substring(getItem(position).indexOf(":")+1));
               }

           }else{ //   convertView != null
               view = convertView;
               // to do......
               Object tag = view.getTag();
               if(tag != null){
                   if("IndexView".equals(tag.toString())){
                       if(getItem(position).indexOf(":")==-1){
                           TextView dateView = (TextView) view.findViewById(R.id.problemIndexName);
                           dateView.setText(getItem(position));
                       }else{
                           view = LayoutInflater.from(getContext()).inflate(R.layout.problem_list_item, null);
                           view.setTag("ProblemView");

                           TextView idView = (TextView) view.findViewById(R.id.problemId);
                           idView.setText(getItem(position).substring(0,getItem(position).indexOf(":")));
                           TextView titleView = (TextView) view.findViewById(R.id.problemName);
                           titleView.setText(getItem(position).substring(getItem(position).indexOf(":")+1));
                       }
                   }else if("ProblemView".equals(tag.toString())){
                       if(getItem(position).indexOf(":")==-1){
                           view = LayoutInflater.from(getContext()).inflate(R.layout.problem_index_item, null);
                           view.setTag("IndexView");

                           TextView dateView = (TextView) view.findViewById(R.id.problemIndexName);
                           dateView.setText(getItem(position));
                       }else{
                           TextView idView = (TextView) view.findViewById(R.id.problemId);
                           idView.setText(getItem(position).substring(0,getItem(position).indexOf(":")));
                           TextView titleView = (TextView) view.findViewById(R.id.problemName);
                           titleView.setText(getItem(position).substring(getItem(position).indexOf(":")+1));
                       }
                   }
               }
           }
           return view;
       }

------------------------测试了一下，发现好多了，可是当你快速滑动的时候，还是有这样的问题。

搜索了一下发现（“ListView convertView 重用，多种item 布局）：

http://www.eoeandroid.com/thread-72369-1-1.html

这个帖子巨好！！！

修改后的代码：

/**
   * the layout of ListView's Item
   */
   class ViewHolderIndexView{
       TextView dateView;
   }
   class ViewHolderProblemView{
       TextView idView,titleView;
   }

   /**
   * This is a class that used to as a adapter for ListView.
   */
   private class GroupListAdapter extends ArrayAdapter<String>{
       LayoutInflater inflater;
       final int TYPE_INDEX_VIEW = 0;
       final int TYPE_PROBLEM_VIEW = 1;


       public GroupListAdapter(Context context, List<String> list) {
           super(context, 0, list);
           inflater = LayoutInflater.from(context);
       }

        //every convertView will invoke this method, get the wanted view style
       @Override
       public int getItemViewType(int position) {
           if(getItem(position).indexOf(":")==-1){
               return TYPE_INDEX_VIEW;
           }else{
               return TYPE_PROBLEM_VIEW;
           }
       }

       @Override
       public int getViewTypeCount(){
           return 2;
       }

       @Override
       public boolean isEnabled(int position) {
           //index didn't contain the ':'.
           if(getItem(position).indexOf(":")==-1){
               return false;
           }
           return super.isEnabled(position);
       }


       @Override
       public View getView(int position, View convertView, ViewGroup parent) {
           ViewHolderIndexView holder_IndexView = null;
           ViewHolderProblemView holder_problemView = null;
           int type = getItemViewType(position);

           if(convertView == null){
               switch(type){
               case TYPE_INDEX_VIEW:
                   //convertView = inflater.inflate(R.layout.problem_index_item, parent,false); 注意：用这样的方式布局无法保持原来的样子
                   convertView = inflater.inflate(R.layout.problem_index_item, null);
                   holder_IndexView = new ViewHolderIndexView();
                   holder_IndexView.dateView = (TextView)convertView.findViewById(R.id.problemIndexName);
                   convertView.setTag(holder_IndexView);
                   break;
               case TYPE_PROBLEM_VIEW:
                   //convertView = inflater.inflate(R.layout.problem_list_item, parent,false); 注意：用这样的方式布局无法保持原来的样子
                   convertView = inflater.inflate(R.layout.problem_list_item, null);
                   holder_problemView = new ViewHolderProblemView();
                   holder_problemView.idView = (TextView)convertView.findViewById(R.id.problemId);
                   holder_problemView.titleView = (TextView)convertView.findViewById(R.id.problemName);
                   convertView.setTag(holder_problemView);
                   break;
               }
           }else{ // convertView != null
               switch(type){
               case TYPE_INDEX_VIEW:
                   holder_IndexView = (ViewHolderIndexView)convertView.getTag();
                   break;
               case TYPE_PROBLEM_VIEW:
                   holder_problemView = (ViewHolderProblemView)convertView.getTag();
                   break;
               }
           }

           //Distinguish the index and data item of the List and give them the different layout.
           // set data for layout
           switch(type){
           case TYPE_INDEX_VIEW:
               holder_IndexView.dateView.setText(getItem(position));
               break;
           case TYPE_PROBLEM_VIEW:
               holder_problemView.idView.setText(getItem(position).substring(0,getItem(position).indexOf(":")));
               holder_problemView.titleView.setText(getItem(position).substring(getItem(position).indexOf(":")+1));
               break;
           }

           return convertView;
       }
   }

问题解决了！！！！哈哈