android中自定义progressDialog实现

我们在项目中经常会遇到这样一个应用场景：执行某个耗时操作时,为了安抚用户等待的烦躁心情我们一般会使用进度条之类的空间,在android中让大家最 容易想到的就是progressbar或者progressDialog，区别在于前者是一个控件，后者是对话框。由于一些需求在弹出进度条时不希望用户 能够操作其他控件，所以只能使用progressDialog，这个时候有遇到了一个问题，我不想要progressDialog的黑色框框，感觉这样跟 应用的整体风格不协调，这个时候就考虑了写一个自定义的progressDialog。
         在网上搜过很多自定义progressDialog的例子，对着写了下，但是没有任何效果，不知道是自己使用的方法不对还是什么地方出错了。通过不断的查找资料，写了一个简单的自定义progressDialog。先上图看下效果：

1.String.xml 文件，progressDialog是继承与Dialog，先设置一下progressDialog的风格，设置背景透明色。

<style name="CustomDialog" parent="@android:style/Theme.Dialog">  
    <item name="android:windowFrame">@null</item>  
        <item name="android:windowIsFloating">true</item>  
        <item name="android:windowContentOverlay">@null</item>  
        <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>  
        <item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>  
    </style>  
      
    <style name="CustomProgressDialog" parent="@style/CustomDialog">  
        <item name="android:windowBackground">@android:color/transparent</item>  
        <item name="android:windowNoTitle">true</item>  
    </style>  

2.customprogressdialog.xml文件，定义自己的布局，由于我的需求只需要一个进度条以及一串显示的内容，所以布局比较接单

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout  
  xmlns:android="http://schemas.android.com/apk/res/android"  
  android:layout_width="fill_parent"  
  android:layout_height="fill_parent"  
  android:orientation="horizontal">  
    <ImageView  
        android:id="@+id/loadingImageView"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:background="@anim/progress_round"/>  
    <TextView  
<?xml version="1.0" encoding="utf-8"?>  
<animation-list  
    xmlns:android="http://schemas.android.com/apk/res/android"  
    android:oneshot="false">  
    <item android:drawable="@drawable/progress_1" android:duration="200"/>  
    <item android:drawable="@drawable/progress_2" android:duration="200"/>  
    <item android:drawable="@drawable/progress_3" android:duration="200"/>  
    <item android:drawable="@drawable/progress_4" android:duration="200"/>  
    <item android:drawable="@drawable/progress_5" android:duration="200"/>  
    <item android:drawable="@drawable/progress_6" android:duration="200"/>  
    <item android:drawable="@drawable/progress_7" android:duration="200"/>  
    <item android:drawable="@drawable/progress_8" android:duration="200"/>  
</animation-list>         android:id="@+id/id_tv_loadingmsg"  
        android:layout_width="wrap_content"  
        android:layout_height="wrap_content"  
        android:layout_gravity="center_vertical"  
        android:textSize="20dp"/>  
</LinearLayout>  

3.progress_round.xml文件.这个文件为了实现转动的效果，循环显示这些图片。

<?xml version="1.0" encoding="utf-8"?>  
<animation-list  
    xmlns:android="http://schemas.android.com/apk/res/android"  
    android:oneshot="false">  
    <item android:drawable="@drawable/progress_1" android:duration="200"/>  
    <item android:drawable="@drawable/progress_2" android:duration="200"/>  
    <item android:drawable="@drawable/progress_3" android:duration="200"/>  
    <item android:drawable="@drawable/progress_4" android:duration="200"/>  
    <item android:drawable="@drawable/progress_5" android:duration="200"/>  
    <item android:drawable="@drawable/progress_6" android:duration="200"/>  
    <item android:drawable="@drawable/progress_7" android:duration="200"/>  
    <item android:drawable="@drawable/progress_8" android:duration="200"/>  
</animation-list>  

 

4.CustomProgressDialog.java文件，这个是就是我们最终需要使用的progressDialog了

 

/**************************************************************************************
* [Project]
*       MyProgressDialog
* [Package]
*       com.lxd.widgets
* [FileName]
*       CustomProgressDialog.java
* [Copyright]
*       Copyright 2012 LXD All Rights Reserved.
* [History]
*       Version          Date              Author                        Record
*--------------------------------------------------------------------------------------
*       1.0.0           2012-4-27         lxd (rohsuton@gmail.com)        Create
**************************************************************************************/
	
package com.lxd.widgets;


import com.lxd.activity.R;

import android.app.Dialog;
import android.content.Context;
import android.graphics.drawable.AnimationDrawable;
import android.view.Gravity;
import android.widget.ImageView;
import android.widget.TextView;


/********************************************************************
 * [Summary]
 *       TODO 请在此处简要描述此类所实现的功能。因为这项注释主要是为了在IDE环境中生成tip帮助，务必简明扼要
 * [Remarks]
 *       TODO 请在此处详细描述类的功能、调用方法、注意事项、以及与其它类的关系.
 *******************************************************************/

public class CustomProgressDialog extends Dialog {
	private Context context = null;
	private static CustomProgressDialog customProgressDialog = null;
	
	public CustomProgressDialog(Context context){
		super(context);
		this.context = context;
	}
	
	public CustomProgressDialog(Context context, int theme) {
        super(context, theme);
    }
	
	public static CustomProgressDialog createDialog(Context context){
		customProgressDialog = new CustomProgressDialog(context,R.style.CustomProgressDialog);
		customProgressDialog.setContentView(R.layout.customprogressdialog);
		customProgressDialog.getWindow().getAttributes().gravity = Gravity.CENTER;
		
		return customProgressDialog;
	}
 
    public void onWindowFocusChanged(boolean hasFocus){
    	
    	if (customProgressDialog == null){
    		return;
    	}
    	
        ImageView imageView = (ImageView) customProgressDialog.findViewById(R.id.loadingImageView);
        AnimationDrawable animationDrawable = (AnimationDrawable) imageView.getBackground();
        animationDrawable.start();
    }
 
    /**
     * 
     * [Summary]
     *       setTitile 标题
     * @param strTitle
     * @return
     *
     */
    public CustomProgressDialog setTitile(String strTitle){
    	return customProgressDialog;
    }
    
    /**
     * 
     * [Summary]
     *       setMessage 提示内容
     * @param strMessage
     * @return
     *
     */
    public CustomProgressDialog setMessage(String strMessage){
    	TextView tvMsg = (TextView)customProgressDialog.findViewById(R.id.id_tv_loadingmsg);
    	
    	if (tvMsg != null){
    		tvMsg.setText(strMessage);
    	}
    	
    	return customProgressDialog;
    }
}

5.接下来就是写一个测试activity调用我们的progressDialog了。

package com.lxd.activity;

import com.lxd.widgets.CustomProgressDialog;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.view.Window;
import android.view.WindowManager;

public class MainFrame extends Activity {
	private MainFrameTask mMainFrameTask = null;
	private CustomProgressDialog progressDialog = null;
	
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
        WindowManager.LayoutParams.FLAG_FULLSCREEN);
        
        setContentView(R.layout.main);
        
        mMainFrameTask = new MainFrameTask(this);
        mMainFrameTask.execute();
    }
    
	@Override
	protected void onDestroy() {
		stopProgressDialog();
		
		if (mMainFrameTask != null && !mMainFrameTask.isCancelled()){
			mMainFrameTask.cancel(true);
		}
		
		super.onDestroy();
	}

	private void startProgressDialog(){
		if (progressDialog == null){
			progressDialog = CustomProgressDialog.createDialog(this);
	    	progressDialog.setMessage("正在加载中...");
		}
		
    	progressDialog.show();
	}
	
	private void stopProgressDialog(){
		if (progressDialog != null){
			progressDialog.dismiss();
			progressDialog = null;
		}
	}
	
	public class MainFrameTask extends AsyncTask<Integer, String, Integer>{
		private MainFrame mainFrame = null;
		
		public MainFrameTask(MainFrame mainFrame){
			this.mainFrame = mainFrame;
		}
		
		@Override
		protected void onCancelled() {
			stopProgressDialog();
			super.onCancelled();
		}

		@Override
		protected Integer doInBackground(Integer... params) {
			
			try {
				Thread.sleep(10 * 1000);
			} catch (InterruptedException e) {
				e.printStackTrace();
			}
			return null;
		}
			
		@Override
		protected void onPreExecute() {
			startProgressDialog();
		}

		@Override
		protected void onPostExecute(Integer result) {
			stopProgressDialog();
		}
			
		
		
	}
}