ListView是比較常用的控件,但一直都覺得創建ListView步驟有點繁瑣,故在此總結一下,方便查閱。
程序效果是實現一個ListView,ListView裡面有標題,內容和圖片,並加入點擊和長按響應。
首先在xml裡面定義一個ListView
- <?xml version="1.0" encoding="utf-8"?>
- <LinearLayout
- android:id="@+id/LinearLayout01"
- android:layout_width="fill_parent"
- android:layout_height="fill_parent"
- xmlns:android="http://schemas.android.com/apk/res/android">
- <ListView android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:id="@+id/ListView01"
- />
- </LinearLayout>
定義ListView每個條目的Layout,用RelativeLayout實現:
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout
- android:id="@+id/RelativeLayout01"
- android:layout_width="fill_parent"
- xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_height="wrap_content"
- android:paddingBottom="4dip"
- android:paddingLeft="12dip"
- android:paddingRight="12dip">
- <ImageView
- android:paddingTop="12dip"
- android:layout_alignParentRight="true"
- android:layout_width="wrap_content"
- android:layout_height="wrap_content"
- android:id="@+id/ItemImage"
- />
- <TextView
- android:text="TextView01"
- android:layout_height="wrap_content"
- android:textSize="20dip"
- android:layout_width="fill_parent"
- android:id="@+id/ItemTitle"
- />
- <TextView
- android:text="TextView02"
- android:layout_height="wrap_content"
- android:layout_width="fill_parent"
- android:layout_below="@+id/ItemTitle"
- android:id="@+id/ItemText"
- />
- </RelativeLayout>
最後在Activity裡面調用和加入Listener,具體見注釋:
- package com.ray.test;
-
- import java.util.ArrayList;
- import java.util.HashMap;
-
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.ContextMenu;
- import android.view.MenuItem;
- import android.view.View;
- import android.view.ContextMenu.ContextMenuInfo;
- import android.view.View.OnCreateContextMenuListener;
- import android.widget.AdapterView;
- import android.widget.ListView;
- import android.widget.SimpleAdapter;
- import android.widget.AdapterView.OnItemClickListener;
-
- public class TestListView extends Activity {
- @Override
- public void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- //綁定Layout裡面的ListView
- ListView list = (ListView) findViewById(R.id.ListView01);
-
- //生成動態數組,加入數據
- ArrayList<HashMap<String, Object>> listItem = new ArrayList<HashMap<String, Object>>();
- for(int i=0;i<10;i++)
- {
- HashMap<String, Object> map = new HashMap<String, Object>();
- map.put("ItemImage", R.drawable.checked);//圖像資源的ID
- map.put("ItemTitle", "Level "+i);
- map.put("ItemText", "Finished in 1 Min 54 Secs, 70 Moves! ");
- listItem.add(map);
- }
- //生成適配器的Item和動態數組對應的元素
- SimpleAdapter listItemAdapter = new SimpleAdapter(this,listItem,//數據源
- R.layout.list_items,//ListItem的XML實現
- //動態數組與ImageItem對應的子項
- new String[] {"ItemImage","ItemTitle", "ItemText"},
- //ImageItem的XML文件裡面的一個ImageView,兩個TextView ID
- new int[] {R.id.ItemImage,R.id.ItemTitle,R.id.ItemText}
- );
-
- //添加並且顯示
- list.setAdapter(listItemAdapter);
-
- //添加點擊
- list.setOnItemClickListener(new OnItemClickListener() {
-
- @Override
- public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
- long arg3) {
- setTitle("點擊第"+arg2+"個項目");
- }
- });
-
- //添加長按點擊
- list.setOnCreateContextMenuListener(new OnCreateContextMenuListener() {
-
- @Override
- public void onCreateContextMenu(ContextMenu menu, View v,ContextMenuInfo menuInfo) {
- menu.setHeaderTitle("長按菜單-ContextMenu");
- menu.add(0, 0, 0, "彈出長按菜單0");
- menu.add(0, 1, 0, "彈出長按菜單1");
- }
- });
- }
-
- //長按菜單響應函數
- @Override
- public boolean onContextItemSelected(MenuItem item) {
- setTitle("點擊了長按菜單裡面的第"+item.getItemId()+"個項目");
- return super.onContextItemSelected(item);
- }
- }