说到GridView Listview一定会提到他的adapter，现整理如下：
main.xml布局里面：
[html] <GridView
android:id="@+id/grid"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="70dp"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center"
/>
<GridView
android:id="@+id/grid"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="70dp"
android:numColumns="auto_fit"
android:verticalSpacing="10dp"
android:horizontalSpacing="10dp"
android:stretchMode="columnWidth"
android:gravity="center"
/>
gridview_item.xml：
[html] <?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:layout_gravity="center"
>
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:layout_gravity="center">
<ImageView
android:id="@+id/grid_icon"
android:layout_height="80dip"
android:layout_width="80dip"
android:gravity="center"
android:layout_gravity="center"
>
</ImageView>
<TextView
android:id="@+id/grid_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:gravity="center"
android:layout_gravity="center"
android:textSize="13px"
android:layout_marginTop="4dip"
>
</TextView>
</LinearLayout>
</FrameLayout>
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:layout_gravity="center"
>
<LinearLayout
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:orientation="vertical"
android:gravity="center"
android:layout_gravity="center">
<ImageView
android:id="@+id/grid_icon"
android:layout_height="80dip"
android:layout_width="80dip"
android:gravity="center"
android:layout_gravity="center"
>
</ImageView>
<TextView
android:id="@+id/grid_name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:gravity="center"
android:layout_gravity="center"
android:textSize="13px"
android:layout_marginTop="4dip"
>
</TextView>
</LinearLayout>
</FrameLayout>
java 代码：
[java] GridView grid = (GridView) findViewById(R.id.grid);
grid.setAdapter(new GridAdapter(this, mNameList, mDrawableList));
GridView grid = (GridView) findViewById(R.id.grid);
grid.setAdapter(new GridAdapter(this, mNameList, mDrawableList));
GridAdapter.java类：
[java] package com.android.test;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class GridAdapter extends BaseAdapter {
private ArrayList<String> mNameList = new ArrayList<String>();
private ArrayList<Drawable> mDrawableList = new ArrayList<Drawable>();
private LayoutInflater mInflater;
private Context mContext;
LinearLayout.LayoutParams params;
public GridAdapter(Context context, ArrayList<String> nameList, ArrayList<Drawable> drawableList) {
mNameList = nameList;
mDrawableList = drawableList;
mContext = context;
mInflater = LayoutInflater.from(context);
params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.gravity = Gravity.CENTER;
}
public int getCount() {
return mNameList.size();
}
public Object getItem(int position) {
return mNameList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ItemViewTag viewTag;
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.gridview_item, null);
// construct an item tag
viewTag = new ItemViewTag((ImageView) convertView.findViewById(R.id.grid_icon), (TextView) convertView.findViewById(R.id.grid_name));
convertView.setTag(viewTag);
} else
{
viewTag = (ItemViewTag) convertView.getTag();
}
// set name
viewTag.mName.setText(mNameList.get(position));
// set icon
viewTag.mIcon.setBackgroundDrawable(mDrawableList.get(position));
viewTag.mIcon.setLayoutParams(params);
return convertView;
}
class ItemViewTag
{
protected ImageView mIcon;
protected TextView mName;
/**
* The constructor to construct a navigation view tag
*
* @param name
*the name view of the item
* @param size
*the size view of the item
* @param icon
*the icon view of the item
*/
public ItemViewTag(ImageView icon, TextView name)
{
this.mName = name;
this.mIcon = icon;
}
}
}
package com.android.test;
import java.util.ArrayList;
import android.content.Context;
import android.graphics.drawable.Drawable;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
public class GridAdapter extends BaseAdapter {
private ArrayList<String> mNameList = new ArrayList<String>();
private ArrayList<Drawable> mDrawableList = new ArrayList<Drawable>();
private LayoutInflater mInflater;
private Context mContext;
LinearLayout.LayoutParams params;
public GridAdapter(Context context, ArrayList<String> nameList, ArrayList<Drawable> drawableList) {
mNameList = nameList;
mDrawableList = drawableList;
mContext = context;
mInflater = LayoutInflater.from(context);
params = new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT);
params.gravity = Gravity.CENTER;
}
public int getCount() {
return mNameList.size();
}
public Object getItem(int position) {
return mNameList.get(position);
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
ItemViewTag viewTag;
if (convertView == null)
{
convertView = mInflater.inflate(R.layout.gridview_item, null);
// construct an item tag
viewTag = new ItemViewTag((ImageView) convertView.findViewById(R.id.grid_icon), (TextView) convertView.findViewById(R.id.grid_name));
convertView.setTag(viewTag);
} else
{
viewTag = (ItemViewTag) convertView.getTag();
}
// set name
viewTag.mName.setText(mNameList.get(position));
// set icon
viewTag.mIcon.setBackgroundDrawable(mDrawableList.get(position));
viewTag.mIcon.setLayoutParams(params);
return convertView;
}
class ItemViewTag
{
protected ImageView mIcon;
protected TextView mName;
/**
* The constructor to construct a navigation view tag
*
* @param name
*the name view of the item
* @param size
*the size view of the item
* @param icon
*the icon view of the item
*/
public ItemViewTag(ImageView icon, TextView name)
{
this.mName = name;
this.mIcon = icon;
}
}
}
到此，adapter的使用就算结束，效果图如下：
摘自 知识空间
