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裏面有標題,內容和圖片,並加入點擊和長按響應。
首先在xml裏面定義一個ListView
Xml代碼
定義ListView每個條目的Layout,用RelativeLayout實現:
Xml代碼
<?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裏面調用和加入Listener,具體見註釋:
Java代碼
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裏面的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文件裏面的一個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("點擊了長按菜單裏面的第"+item.getItemId()+"個項目"); return super.onContextItemSelected(item); } }