Android Dialog—列表项带图标的列表对话框

1、将TextView装载到列表项中去就可以实现带图标的列表项，这里需要借助BaseAdapter适配器来实现，然后通过getView将TextView返回就OK。

设置图片资源到TextView需要用到setCompoundDrawable(left,top,right,bottom)此方法，如下:

textView.setCompoundDrawablesWithIntrinsicBounds(imgIds[position], 0, 0, 0); 

imgIds是图片资源数组,即将图片资源设置到TextView的左边（文字在右边，相对位置为文字）

具体设置TextView如下：

TextView textView = 
	new TextView(IconListDialogActivity.this);
//获得array.xml中的数组资源getStringArray返回的是一个String数组
String text = getResources().getStringArray(R.array.hobby)[position];
textView.setText(text);
//设置字体大小
textView.setTextSize(24);
AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(
		LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);
textView.setLayoutParams(layoutParams);
//设置水平方向上居中
textView.setGravity(android.view.Gravity.CENTER_VERTICAL);
textView.setMinHeight(65);
//设置文字颜色
textView.setTextColor(Color.BLACK);  
//设置图标在文字的左边
textView.setCompoundDrawablesWithIntrinsicBounds(imgIds[position], 0, 0, 0);
//设置textView的左上右下的padding大小
textView.setPadding(15, 0, 15, 0);
//设置文字和图标之间的padding大小
textView.setCompoundDrawablePadding(15);

关于BaseAdapter具体用法和对话框原理，参考spinner下拉列表和普通对话框原理



2、模拟菜单项带图标

对于菜单的子菜单项，无论是上下文菜单ContextMenu还是SubMenu都不支持图片资源，这里针对输入框的上下文菜单的简单模拟(其他类似)。输入框长按将弹出菜单，故需要对输入框长按事件监听，如下

EditText editText = (EditText) findViewById(R.id.editText);  
View.OnLongClickListener editListener =   
    new View.OnLongClickListener() {  
        @Override  
        public boolean onLongClick(View view) {  
            showDialog(ICON_LIST_DIALOG);  
            return true;  
        }  
    };  
editText.setOnLongClickListener(editListener);  

---------------------------------------------------------------------------------------------------------

实现步骤

第一步：定义res/values/array.xml 用来存放列表项文字内容

<?xml version="1.0" encoding="utf-8"?>
<resources>
	<string-array name="hobby">
		<item>篮球</item>
		<item>足球</item>
		<item>排球</item>
	</string-array>
</resources>

第二步：接下来还是一个输入框和一个按钮，如下

res/layout/icon_list_dialog_layout.xml

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout  
  xmlns:android="http://schemas.android.com/apk/res/android"  
  android:orientation="vertical"  
  android:layout_width="fill_parent"  
  android:layout_height="wrap_content">  
  <EditText android:id="@+id/editText"  
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:text="长按输入框将弹出上下文菜单ContextMenu"/>  
  <Button android:id="@+id/button"   
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    android:text="显示列表对话框 "  
    />  
</LinearLayout>  

第三步：src/com/myiconlistdialog/activity/IconListDialogActivity.java

package com.myiconlistdialog.activity;

import android.app.Activity;
import android.app.AlertDialog;
import android.app.Dialog;
import android.app.AlertDialog.Builder;
import android.content.DialogInterface;
import android.graphics.Color;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;
import android.widget.AbsListView;
import android.widget.BaseAdapter;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;

public class IconListDialogActivity extends Activity {
	
	private int[] imgIds = {R.drawable.basketball, 
			R.drawable.football, R.drawable.volleyball};
	
	private final int ICON_LIST_DIALOG = 1;
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.icon_list_dialog_layout);
        
        Button button = (Button) findViewById(R.id.button);
        View.OnClickListener btnListener = new View.OnClickListener() {
			
			@Override
			public void onClick(View view) {
				showDialog(ICON_LIST_DIALOG);
			}
		};
		button.setOnClickListener(btnListener);
		
		EditText editText = (EditText) findViewById(R.id.editText);
		View.OnLongClickListener editListener = 
			new View.OnLongClickListener() {
				@Override
				public boolean onLongClick(View view) {
					showDialog(ICON_LIST_DIALOG);
					return true;
				}
			};
		editText.setOnLongClickListener(editListener);
		
    }
    
    
    @Override
    protected Dialog onCreateDialog(int id) {
    	Dialog dialog = null;
    	switch(id) {
    		case ICON_LIST_DIALOG:
    			Builder builder = new AlertDialog.Builder(this);
    			builder.setIcon(R.drawable.basketball);
    			builder.setTitle("体育爱好");
    			BaseAdapter adapter = new ListItemAdapter();
    			DialogInterface.OnClickListener listener = 
    				new DialogInterface.OnClickListener() {
						@Override
						public void onClick(DialogInterface dialogInterface, int which) {
							EditText editText = 
								(EditText) findViewById(R.id.editText);
							editText.setText("你选择了: " +getResources()
									.getStringArray(R.array.hobby)[which]);
						}
					};
				builder.setAdapter(adapter, listener);
    			dialog = builder.create();
    			break;
    	}
    	return dialog;
    }
    
    
    class ListItemAdapter extends BaseAdapter {

		@Override
		public int getCount() {
			return imgIds.length;
		}

		@Override
		public Object getItem(int position) {
			return null;
		}

		@Override
		public long getItemId(int position) {
			return 0;
		}

		@Override
		public View getView(int position, 
				View contentView, ViewGroup parent) {
			TextView textView = 
				new TextView(IconListDialogActivity.this);
			//获得array.xml中的数组资源getStringArray返回的是一个String数组
			String text = getResources().getStringArray(R.array.hobby)[position];
			textView.setText(text);
			//设置字体大小
			textView.setTextSize(24);
			AbsListView.LayoutParams layoutParams = new AbsListView.LayoutParams(
					LayoutParams.FILL_PARENT,LayoutParams.WRAP_CONTENT);
			textView.setLayoutParams(layoutParams);
			//设置水平方向上居中
			textView.setGravity(android.view.Gravity.CENTER_VERTICAL);
			textView.setMinHeight(65);
			//设置文字颜色
			textView.setTextColor(Color.BLACK);  
			//设置图标在文字的左边
			textView.setCompoundDrawablesWithIntrinsicBounds(imgIds[position], 0, 0, 0);
			//设置textView的左上右下的padding大小
			textView.setPadding(15, 0, 15, 0);
			//设置文字和图标之间的padding大小
			textView.setCompoundDrawablePadding(15);
			return textView;
		}
		
    	
    }
}

目录结构



效果图：




源代码地址：http://download.csdn.net/source/3220141