Android控件之GridView的使用

GridView主要是类似表格的形式显示数据。这里主要是模仿别人的Demo来实现了一下。

XML布局文件之activity_main.xml

<?xml version="1.0" encoding="utf-8"?>

<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:columnWidth="90dp"

    android:gravity="center"

    android:horizontalSpacing="10dp"

    android:numColumns="auto_fit"

    android:stretchMode="columnWidth"

    android:verticalSpacing="10dp" />

XML布局文件之night_item.xml

<?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="wrap_content"

    android:paddingBottom="4dip" >

<ImageView

        android:id="@+id/itemImage"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_centerHorizontal="true" >

    </ImageView>
<TextView

        android:id="@+id/itemText"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_below="@+id/itemImage"

        android:layout_centerHorizontal="true"

        android:text="TextView01" >

    </TextView>
</RelativeLayout>

XML之资源文件strings.xml

<?xml version="1.0" encoding="utf-8"?>

<resources>

    <string name="hello">Hello World, GvActivity!</string>

    <string name="app_name">GridView的使用</string>

    <string name="action_settings">Settings</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>

    <string name="test_name4">跳转到TestActivity4</string>

</resources>

XML之整个应用文件AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

    package="com.example.gridview"

    android:versionCode="1"

    android:versionName="1.0" >

    <uses-sdk

        android:minSdkVersion="8"

        android:targetSdkVersion="17" />

    <application

        android:allowBackup="true"

        android:icon="@drawable/ic_launcher"

        android:label="@string/app_name"

        android:theme="@style/AppTheme" >

        <activity

            android:name="com.example.gridview.MainActivity"

            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"/>

        <activity android:name=".TestActivity4" android:label="@string/test_name4"/>

    </application>

</manifest>

JAVA源代码文件：

import java.util.ArrayList;

import java.util.HashMap;

import android.os.Bundle;

import android.app.Activity;

import android.content.Intent;

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 String texts[] = null;

    private int images[] = null;
@Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);
images=new int[]{

                  R.drawable.smile1

              , R.drawable.smile2

              , R.drawable.smile3

              , R.drawable.smile4};

        texts = new String[]{

                  "宫式布局1"

                , "宫式布局2"

                , "宫式布局3"

                , "宫式布局4"};
GridView gridview= (GridView) this.findViewById(R.id.gridview);

        ArrayList<HashMap<String, Object>> lastImageItem = new ArrayList<HashMap<String, Object>>();

        /**

         * 初始化数据

         */

        for(int i=0; i<4; i++){

            HashMap<String, Object> map = new HashMap<String, Object>();

            map.put("imageImage", images[i]);

            map.put("imageText", texts[i]);

            lastImageItem.add(map);

        }

        /**

         * lastImageItem 数据源是一个HashMap的集合

         * R.layout.night_item 指定一个布局文件

         * from night_item.xml布局文件中所对应的View的name

         * to night_item.xml布局文件中所对应的View的id

         */

        SimpleAdapter simpleItems = new SimpleAdapter(this

                , lastImageItem

                , R.layout.night_item

                , new String[] { "itemImage", "itemText" }

                , new int[] { R.id.itemImage, R.id.itemText });
gridview.setAdapter(simpleItems);
gridview.setOnItemClickListener(new OnItemClickListener(){
@Override

            public void onItemClick(AdapterView<?> parent, View view, int pos,

                    long rowid) {

                //首先得到选中的集合

                HashMap<String, Object> item = (HashMap<String, Object>) parent.getItemAtPosition(pos);

                //可以得到view的值

                String itemText = (String) item.get("itemText");

                Object object = item.get("itemImage");

                Toast.makeText(MainActivity.this, itemText, Toast.LENGTH_LONG).show();

                //同时知道所点击的位置，是点击了哪个文件

                switch (images[pos]) {

                case R.drawable.smile1:

                    startActivity(new Intent(MainActivity.this,TestActivity1.class));

                    finish();

                    break;

                case R.drawable.smile2:

                    startActivity(new Intent(MainActivity.this,TestActivity2.class));

                    finish();

                    break;

                case R.drawable.smile3:

                    startActivity(new Intent(MainActivity.this,TestActivity3.class));

                    finish();

                    break;

                case R.drawable.smile4:

                    startActivity(new Intent(MainActivity.this,TestActivity4.class));

                    finish();

                    break;

                }
}
});
}
}

JAVA源代码之跳转的文件：

import android.app.Activity;

import android.os.Bundle;

public class TestActivity1 extends Activity {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

    }

}

运行不起来，不知道哪里错了！