关于android中的Toast的用法

package com.TestListView;import android.app.Activity;import android.os.Bundle;import java.util.ArrayList;import java.util.HashMap;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.Button;import android.widget.ListView;import android.widget.SimpleAdapter;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;public class TestListView extends Activity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // 绑定Layout里面的ListView ListView list = (ListView) findViewById(R.id.ListView01); // 生成动态数组，加入数据 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>(); if (0 == i%2) { map.put("ItemButton", "ON"); } else { map.put("ItemButton", "OFF"); } map.put("ItemTitle", "Level "+i); map.put("ItemText", "Finished in 1 Min 54 Secs, 70 Moves! "); listItem.add(map); } // 生成适配器的Item和动态数组对应的元素 SimpleAdapter listItemAdapter = new SimpleAdapter(this,listItem,// 数据源 R.layout.list_items,//ListItem的XML实现 // 动态数组与ImageItem对应的子项 new String[] {"ItemButton","ItemTitle", "ItemText"}, // list_items的XML文件里面的一个Button,两个TextView ID new int[] {R.id.ItemButton,R.id.ItemTitle,R.id.ItemText} ); // 添加并且显示 list.setAdapter(listItemAdapter); // 添加点击 list.setOnItemClickListener(new OnItemClickListener() { @Override public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { setTitle("点击第"+arg2+"个项目"); Button btn = (Button)arg1.findViewById(R.id.ItemButton); if (btn.getText().equals("ON")) { setTitle("Button is ON"); } else { Toast.makeText(getApplicationContext(), "Button is OFF!", Toast.LENGTH_SHORT).show(); } } }); // 添加长按点击 list.setOnCreateContextMenuListener(new OnCreateContextMenuListener() { @Override public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) { menu.setHeaderTitle("长按菜单-ContextMenu"); menu.add(0, 0, 0, "弹出长按菜单0"); menu.add(0, 1, 0, "弹出长按菜单1"); } }); } // 长按菜单响应函数 @Override public boolean onContextItemSelected(MenuItem item) { setTitle("点击了长按菜单里面的第"+item.getItemId()+"个项目"); return super.onContextItemSelected(item); }}

main.xml

<?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> 

 

 

list_items.xml

<?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"><Button android:paddingTop="12dip" android:layout_alignParentRight="true" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/ItemButton" android:text="ON" android:cursorVisible="false" android:focusable="false" android:focusableInTouchMode="false" /> <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>