1.New 一個 Android Application project
2.將Project 命名為 ListViewSimple
3. 首先是LayoutMainActivity.java 檔案, 程式碼如下
package com.example.listviewsimple;
import android.os.Bundle;
import android.app.Activity;
import android.app.ListActivity;
import android.view.Menu;
import android.view.View;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
public class LayoutMainActivity extends ListActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
String[] data = new String[] { "Android", "iPhone", "WindowsMobile",
"Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
"Linux", "OS/2", "Linux Mint", "Linux Open", "HTC" };
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, data);
setListAdapter(adapter);
}
@Override
protected void onListItemClick(ListView l, View v, int position, long id) {
String item = (String) getListAdapter().getItem(position);
Toast.makeText(this, item + " selected", Toast.LENGTH_SHORT).show();
}
}
程式解說:
1.將Activity 命名為 LayoutMainActivity (當然的你可以命名想要的Activity name)並繼承ListActivity
public class LayoutMainActivity extends ListActivity
2. Override onCreate()
這邊先建立一個要顯示在ListView上面的Data來源
String[] data = new String[] { "Android", "iPhone", "WindowsMobile",
"Blackberry", "WebOS", "Ubuntu", "Windows7", "Max OS X",
"Linux", "OS/2", "Linux Mint", "Linux Open", "HTC" };
然後New一個String 的 array adapter
ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1, data);
ArrayAdapter的API使用可以參考以下網址:
http://developer.android.com/reference/android/widget/ArrayAdapter.html#ArrayAdapter(android.content.Context, int, T[])
最後我們設剛剛new的array adapter給ListView
setListAdapter(adapter);
3.Override onListItemClick()
當listview的item被按下後,先取得被按下的item的字串
String item = (String) getListAdapter().getItem(position);
以Toast的方式顯示按下的item已經被選中
Toast.makeText(this, item + " selected", Toast.LENGTH_SHORT).show();
其中Toast.LENGTH_SHORT 是控制Taost在畫面上停留的時間
所以如果覺得Toast顯示時間太短可以改成Toast.LENGTH_LONG
結果畫面:
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