加载中动画(拼接图片)

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
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;
}
}