android 常用控件 （GridView）

<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"
android:paddingBottom="0dp"
android:paddingLeft="0dp"
android:paddingRight="0dp"
android:paddingTop="0dp"
tools:context=".MainActivity" >

<GridView
android:id="@+id/ceshi"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:columnWidth="40dp"
android:gravity="center"
android:horizontalSpacing="10dp"
android:numColumns="3"
android:stretchMode="columnWidth"
android:verticalSpacing="10dp" >
</GridView>

</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="match_parent" >

<ImageView
android:id="@+id/imageView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:src="@drawable/ic_launcher" />

<TextView
android:id="@+id/textView1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_below="@+id/imageView1"
android:layout_marginTop="14dp"
android:text="@string/hello_world" />

</RelativeLayout>

package com.example.mytool;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;

import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.widget.AdapterView;
import android.widget.AdapterView.OnItemClickListener;
import android.widget.GridView;
import android.widget.SimpleAdapter;
import android.widget.Toast;

public class MainActivity extends Activity {
private GridView gview;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
gview=(GridView)this.findViewById(R.id.ceshi);
ArrayList<HashMap<String, Object>> listview=new ArrayList<HashMap<String, Object>>();
for(int i=0; i< 10; i++){
HashMap<String, Object> map=new HashMap<String, Object>();
map.put("img", R.drawable.ic_launcher);
map.put("wenzi", i+"");
listview.add(map);
}
SimpleAdapter apr=new SimpleAdapter(this,listview,R.layout.listitem,new String[]{"img","wenzi"},new int[]{R.id.imageView1,R.id.textView1});
gview.setAdapter(apr);
gview.setOnItemClickListener(new dianji());
}

private class dianji implements OnItemClickListener{

@Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
// TODO Auto-generated method stub
HashMap<String, Object> itemAtPosition2 = (HashMap<String, Object>)arg0.getItemAtPosition(arg2);
setTitle((String)itemAtPosition2.get("wenzi"));
}

}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}