ListView nested GridView usage details and considerations

MainActivity is as follows:

 
package cn.testlistviewandgridview; 
import java.util.ArrayList; 
import java.util.HashMap; 
import android.app.Activity; 
import android.os.Bundle; 
import android.widget.ListView; 
/** 
* Demo describe : 
* ListView nested GridView The use of,  
*  namely ListView Each of the Item contains 1 a GridView 
* 
*  Matters needing attention : 
*  Due to the ListView and GridView Are all sliding controls . 
*  So you need to customize it GridView, Rewrite the onMeasure() methods . 
*  In this method GridView High for wrap_content The size of the , Otherwise, GridView In the  
*  The content can only be displayed very small 1 Part of the  
* 
*  The resources : 
* 1 http://bbs.csdn.net/topics/380245627 
* 2 http://blog.csdn.net/lsong89/article/details/8598856 
* Thank you very much 
*/ 
public class MainActivity extends Activity { 
private ListView mListView; 
private ListViewAdapter mListViewAdapter; 
private ArrayList<ArrayList<HashMap<String,Object>>> mArrayList; 
@Override 
protected void onCreate(Bundle savedInstanceState) { 
super.onCreate(savedInstanceState); 
setContentView(R.layout.main); 
init(); 
} 
private void init(){ 
mListView=(ListView) findViewById(R.id.listView); 
initData(); 
mListViewAdapter=new ListViewAdapter(mArrayList, MainActivity.this); 
mListView.setAdapter(mListViewAdapter); 
} 
private void initData(){ 
mArrayList=new ArrayList<ArrayList<HashMap<String,Object>>>(); 
HashMap<String, Object> hashMap=null; 
ArrayList<HashMap<String,Object>> arrayListForEveryGridView; 

for (int i = 0; i < 10; i++) { 
arrayListForEveryGridView=new ArrayList<HashMap<String,Object>>(); 
for (int j = 0; j < 5; j++) { 
hashMap=new HashMap<String, Object>(); 
hashMap.put("content", "i="+i+" ,j="+j); 
arrayListForEveryGridView.add(hashMap); 
} 
mArrayList.add(arrayListForEveryGridView); 
} 

} 
} 

ListViewAdapter is as follows:

 
package cn.testlistviewandgridview; 
import java.util.ArrayList; 
import java.util.HashMap; 
import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.GridView; 
import android.widget.ImageView; 
public class ListViewAdapter extends BaseAdapter { 
private ArrayList<ArrayList<HashMap<String, Object>>> mList; 
private Context mContext; 

public ListViewAdapter(ArrayList<ArrayList<HashMap<String, Object>>> mList, Context mContext) { 
super(); 
this.mList = mList; 
this.mContext = mContext; 
} 
@Override 
public int getCount() { 
if (mList == null) { 
return 0; 
} else { 
return this.mList.size(); 
} 
} 
@Override 
public Object getItem(int position) { 
if (mList == null) { 
return null; 
} else { 
return this.mList.get(position); 
} 
} 
@Override 
public long getItemId(int position) { 
return position; 
} 
@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
ViewHolder holder = null; 
if (convertView == null) { 
holder = new ViewHolder(); 
convertView = LayoutInflater.from 
(this.mContext).inflate(R.layout.listview_item, null, false); 
holder.imageView = (ImageView) convertView.findViewById(R.id.listview_item_imageview); 
holder.gridView = (GridView) convertView.findViewById(R.id.listview_item_gridview); 
convertView.setTag(holder); 
} else { 
holder = (ViewHolder) convertView.getTag(); 
} 


if (this.mList != null) { 
if (holder.imageView != null) { 
holder.imageView.setImageDrawable 
(mContext.getResources().getDrawable(R.drawable.e)); 
} 
if (holder.gridView != null) { 
ArrayList<HashMap<String, Object>> arrayListForEveryGridView = this.mList.get(position); 
GridViewAdapter gridViewAdapter=new GridViewAdapter(mContext, arrayListForEveryGridView); 
holder.gridView.setAdapter(gridViewAdapter); 
} 
} 
return convertView; 
} 

private class ViewHolder { 
ImageView imageView; 
GridView gridView; 
} 
} 

GridViewAdapter is as follows:

 
package cn.testlistviewandgridview; 
import java.util.ArrayList; 
import java.util.HashMap; 
import android.content.Context; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.BaseAdapter; 
import android.widget.Button; 
import android.widget.Toast; 
public class GridViewAdapter extends BaseAdapter{ 
private Context mContext; 
private ArrayList<HashMap<String, Object>> mList; 

public GridViewAdapter(Context mContext,ArrayList<HashMap<String, Object>> mList) { 
super(); 
this.mContext = mContext; 
this.mList = mList; 
} 
@Override 
public int getCount() { 
if (mList == null) { 
return 0; 
} else { 
return this.mList.size(); 
} 
} 
@Override 
public Object getItem(int position) { 
if (mList == null) { 
return null; 
} else { 
return this.mList.get(position); 
} 
} 
@Override 
public long getItemId(int position) { 
return position; 
} 
@Override 
public View getView(final int position, View convertView, ViewGroup parent) { 
ViewHolder holder = null; 
if (convertView == null) { 
holder = new ViewHolder(); 
convertView = LayoutInflater.from 
(this.mContext).inflate(R.layout.gridview_item, null, false); 
holder.button = (Button)convertView.findViewById(R.id.gridview_item_button); 
convertView.setTag(holder); 

} else { 
holder = (ViewHolder) convertView.getTag(); 
} 


if (this.mList != null) { 
HashMap<String, Object> hashMap = this.mList.get(position); 
if (holder.button != null) { 
holder.button.setText(hashMap.get("content").toString()); 
holder.button.setOnClickListener(new OnClickListener() { 
@Override 
public void onClick(View v) { 
Toast.makeText(mContext, " The first "+(position+1)+" a ", Toast.LENGTH_SHORT).show(); 
} 
}); 
} 
} 
return convertView; 
} 

private class ViewHolder { 
Button button; 
} 
} 

NoScrollGridView is as follows:

 
package cn.testlistviewandgridview; 
import android.content.Context; 
import android.util.AttributeSet; 
import android.widget.GridView; 
public class NoScrollGridView extends GridView { 
public NoScrollGridView(Context context) { 
super(context); 

} 
public NoScrollGridView(Context context, AttributeSet attrs) { 
super(context, attrs); 
} 

@Override 
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) { 
int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,MeasureSpec.AT_MOST); 
super.onMeasure(widthMeasureSpec, expandSpec); 
} 
} 

main. xml as follows:

 
<RelativeLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
xmlns:tools="http://schemas.android.com/tools" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
> 
<ListView 
android:id="@+id/listView" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:focusable="false" 
/> 
</RelativeLayout> 

listview_item. xml as follows:

 
<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="fill_parent" 
android:layout_height="fill_parent" 
android:orientation="vertical" 
> 
<ImageView 
android:id="@+id/listview_item_imageview" 
android:layout_width="fill_parent" 
android:layout_height="20dip" 
android:scaleType="fitXY" 
android:src="@drawable/e" 
/> 
<cn.testlistviewandgridview.NoScrollGridView 
android:id="@+id/listview_item_gridview" 
android:layout_width="fill_parent" 
android:layout_height="wrap_content" 
android:stretchMode="columnWidth" 
android:verticalSpacing="5dip" 
android:horizontalSpacing="5dip" 
android:numColumns="2"/> 
</LinearLayout> 

gridview_item. xml as follows:

 
<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout 
xmlns:android="http://schemas.android.com/apk/res/android" 
android:layout_width="match_parent" 
android:layout_height="match_parent" 
android:orientation="horizontal" 
android:padding="10dip" 
> 
<Button 
android:id="@+id/gridview_item_button" 
android:layout_width="140dip" 
android:layout_height="40dip" 
android:background="@drawable/e" 
android:textColor="@android:color/background_light" 
android:clickable="true" 
/> 
</LinearLayout>