這次有上次有一點是不同的:
每個圖片下面都有一個文本信息。
這次範例就是實現這個功能。再有一點就是前面的方法就是自己實現一個ImageAdapter繼承BaseAdapter,再供GridView使用
這次本文介紹的GridView用法跟前文ListView的極其類似,利用適配器SimpleAdapter來完成,我柑橘這樣挺簡單的。
- package xiaosi.gridview;
- import java.util.ArrayList;
- import java.util.HashMap;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.View;
- import android.widget.AdapterView;
- import android.widget.AdapterView.OnItemClickListener;
- import android.widget.GridView;
- import android.widget.SimpleAdapter;
- public class GridViewActivity extends Activity {
- /** Called when the activity is first created. */
- private GridView gridview = null;
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- GridView gridview = (GridView) findViewById(R.id.gridview);
- //生成數據源 一個List
- ArrayList<HashMap<String, Object>> DateList = new ArrayList<HashMap<String, Object>>();
- for(int i=0;i<15;i++)
- {
- //醫用HashMap來存儲
- HashMap<String, Object> hashMap = new HashMap<String, Object>();
- //添加圖像資源的ID
- hashMap.put("Image", R.drawable.a);
- //按序號做ItemText
- hashMap.put("Text", "NO."+String.valueOf(i));
- //添加到List去
- DateList.add(hashMap);
- }
- //生成適配器的simpleAdapter
- //DateList 數據源
- //R.layout.item 來自於item。xml 控制GridView中每一項的佈局(一個ImageView 一個TextView)
- //第三個參數是hashoMap的鍵值
- //第四個參數是item。xml中ImageView,TextView的ID
- SimpleAdapter simpleAdapter = new SimpleAdapter(this,DateList,R.layout.item,
- new String[] {"Image","Text"}, new int[] {R.id.ItemImage,R.id.ItemText});
- //添加並且顯示
- gridview.setAdapter(simpleAdapter);
- //添加消息處理
- gridview.setOnItemClickListener(new ItemClickListener());
- }
- private class ItemClickListener implements OnItemClickListener
- {
- public void onItemClick(AdapterView<?> arg0,View arg1, int arg2,long arg3) {
- //arg0就是那個DateList
- HashMap<String, Object> item=(HashMap<String, Object>) arg0.getItemAtPosition(arg2);
- //顯示應用標題的那個TextView
- setTitle((String)item.get("Text"));
- }
- }
- }
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:verticalSpacing="5dip"
- android:horizontalSpacing="5dip"
- android:columnWidth="80dip"
- android:numColumns="auto_fit"
- android:stretchMode="columnWidth"
- android:gravity="center"
- />
創建item.xml
- <?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:id="@+id/ItemImage"
- android:layout_width="wrap_content"
- android:layout_centerHorizontal="true">
- </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>