Android控件之GridView用法实例分析

<?xml version="1.0" encoding="utf-8"?><!-- android:numColumns="auto_fit" ，GridView的列数设置为自动 android:columnWidth="90dp"，每列的宽度，也就是Item的宽度android:stretchMode="columnWidth"，缩放与列宽大小同步android:verticalSpacing="10dp"，两行之间的边距，如：行一(NO.0~NO.2)与行二(NO.3~NO.5)间距为10dpandroid:horizontalSpacing="10dp"，两列之间的边距 --><GridView xmlns:android="http://schemas.android.com/apk/res/android"   android:id="@+id/gridview"  android:layout_width="fill_parent"   android:layout_height="fill_parent"  android:numColumns="auto_fit"  android:verticalSpacing="10dp"  android:horizontalSpacing="10dp"  android:columnWidth="90dp"  android:stretchMode="columnWidth"  android:gravity="center"/>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout  xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_height="wrap_content"   android:paddingBottom="4dip"  android:layout_width="fill_parent">  <ImageView android:layout_height="wrap_content"    android:layout_width="wrap_content"    android:layout_centerHorizontal="true"    android:id="@+id/itemImage" >  </ImageView>  <TextView android:layout_width="wrap_content"    android:layout_below="@+id/itemImage"    android:layout_height="wrap_content"     android:text="TextView01"    android:layout_centerHorizontal="true"     android:id="@+id/itemText">  </TextView></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><resources>  <string name="hello">Hello World, GvActivity!</string>  <string name="app_name">九宫图</string>  <string name="test_name1">跳转到TestActivity1</string>  <string name="test_name2">跳转到TestActivity2</string>  <string name="test_name3">跳转到TestActivity3</string></resources>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"   package="com.ljq.gv"   android:versionCode="1"   android:versionName="1.0">  <application android:icon="@drawable/icon" android:label="@string/app_name">    <activity android:name=".GvActivity"         android:label="@string/app_name">      <intent-filter>        <action android:name="android.intent.action.MAIN" />        <category android:name="android.intent.category.LAUNCHER" />      </intent-filter>    </activity>    <activity android:name=".TestActivity1" android:label="@string/test_name1"/>    <activity android:name=".TestActivity2" android:label="@string/test_name2"/>    <activity android:name=".TestActivity3" android:label="@string/test_name3"/>  </application>  <uses-sdk android:minSdkVersion="7" /></manifest> 

package com.ljq.gv;import android.app.Activity;import android.os.Bundle;public class TestActivity1 extends Activity {  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    //setContentView(R.layout.main);  }}package com.ljq.gv;import android.app.Activity;import android.os.Bundle;public class TestActivity2 extends Activity {  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    //setContentView(R.layout.main);  }}package com.ljq.gv;import android.app.Activity;import android.os.Bundle;public class TestActivity3 extends Activity {  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    //setContentView(R.layout.main);  }}

package com.ljq.gv;import java.util.ArrayList;import java.util.HashMap;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.View;import android.widget.AdapterView;import android.widget.GridView;import android.widget.SimpleAdapter;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class GvActivity extends Activity {  private String texts[] = null;  private int images[] = null;  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.main);    images=new int[]{R.drawable.p1, R.drawable.p2,        R.drawable.p3, R.drawable.p4,         R.drawable.p5,R.drawable.p6,         R.drawable.p7,R.drawable.p8};    texts = new String[]{ "宫式布局1", "宫式布局2",        "宫式布局3", "宫式布局4",         "宫式布局5", "宫式布局6",        "宫式布局7", "宫式布局8"};    GridView gridview = (GridView) findViewById(R.id.gridview);    ArrayList<HashMap<String, Object>> lstImageItem = new ArrayList<HashMap<String, Object>>();    for (int i = 0; i < 8; i++) {      HashMap<String, Object> map = new HashMap<String, Object>();      map.put("itemImage", images[i]);      map.put("itemText", texts[i]);      lstImageItem.add(map);    }    SimpleAdapter saImageItems = new SimpleAdapter(this,         lstImageItem,// 数据源        R.layout.night_item,// 显示布局        new String[] { "itemImage", "itemText" },         new int[] { R.id.itemImage, R.id.itemText });     gridview.setAdapter(saImageItems);    gridview.setOnItemClickListener(new ItemClickListener());  }  class ItemClickListener implements OnItemClickListener {    /**     * 点击项时触发事件     *      * @param parent 发生点击动作的AdapterView     * @param view 在AdapterView中被点击的视图(它是由adapter提供的一个视图)。     * @param position 视图在adapter中的位置。     * @param rowid 被点击元素的行id。     */    public void onItemClick(AdapterView<?> parent, View view, int position, long rowid) {      HashMap<String, Object> item = (HashMap<String, Object>) parent.getItemAtPosition(position);      //获取数据源的属性值      String itemText=(String)item.get("itemText");      Object object=item.get("itemImage");      Toast.makeText(GvActivity.this, itemText, Toast.LENGTH_LONG).show();      //根据图片进行相应的跳转      switch (images[position]) {      case R.drawable.p1:        startActivity(new Intent(GvActivity.this, TestActivity1.class));//启动另一个Activity        finish();//结束此Activity，可回收        break;      case R.drawable.p2:        startActivity(new Intent(GvActivity.this, TestActivity2.class));        finish();        break;      case R.drawable.p3:        startActivity(new Intent(GvActivity.this, TestActivity3.class));        finish();        break;      }    }  }}