[size=large] 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。
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<style name="CustomDialog" parent="@android:style/Theme.Dialog">
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<item name="android:windowFrame">@null</item>
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<item name="android:windowIsFloating">true</item>
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<item name="android:windowContentOverlay">@null</item>
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<itemname="android:windowAnimationStyle">@android:style/Animation.Dialog</item>
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<item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>
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</style>
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<style name="CustomProgressDialog" parent="@style/CustomDialog">
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<item name="android:windowBackground">@android:color/transparent</item>
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<item name="android:windowNoTitle">true</item>
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</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
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<?xml version="1.0" encoding="utf-8"?>
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<LinearLayout
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xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="fill_parent"
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android:layout_height="fill_parent"
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android:orientation="horizontal">
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<ImageView
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android:id="@+id/loadingImageView"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:background="@anim/progress_round"/>
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<TextView
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android:id="@+id/id_tv_loadingmsg"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:layout_gravity="center_vertical"
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android:textSize="20dp"/>
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</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。
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<?xml version="1.0" encoding="utf-8"?>
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<animation-list
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xmlns:android="http://schemas.android.com/apk/res/android"
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android:oneshot="false">
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<item android:drawable="@drawable/progress_1" android:duration="200"/>
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<item android:drawable="@drawable/progress_2" android:duration="200"/>
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<item android:drawable="@drawable/progress_3" android:duration="200"/>
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<item android:drawable="@drawable/progress_4" android:duration="200"/>
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<item android:drawable="@drawable/progress_5" android:duration="200"/>
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<item android:drawable="@drawable/progress_6" android:duration="200"/>
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<item android:drawable="@drawable/progress_7" android:duration="200"/>
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<item android:drawable="@drawable/progress_8" android:duration="200"/>
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</animation-list>
4.CustomProgressDialog.java文件，这个是就是我们最终需要使用的progressDialog了。
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/**************************************************************************************
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* [Project]
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* MyProgressDialog
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* [Package]
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* com.lxd.widgets
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* [FileName]
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* CustomProgressDialog.java
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* [Copyright]
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* Copyright 2012 LXD All Rights Reserved.
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* [History]
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* Version Date Author Record
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*--------------------------------------------------
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* 1.0.0 2012-4-27 lxd ([email protected]) Create
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**************************************************************************************/
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package com.lxd.widgets;
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import com.lxd.activity.R;
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import android.app.Dialog;
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import android.content.Context;
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import android.graphics.drawable.AnimationDrawable;
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import android.view.Gravity;
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import android.widget.ImageView;
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import android.widget.TextView;
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/********************************************************************
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* [Summary]
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* 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
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* [Remarks]
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* 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.
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*******************************************************************/
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public class CustomProgressDialog extends Dialog {
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private Context context = null;
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private static CustomProgressDialog customProgressDialog = null;
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public CustomProgressDialog(Context context){
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super(context);
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this.context = context;
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}
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public CustomProgressDialog(Context context, int theme) {
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super(context, theme);
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}
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public static CustomProgressDialog createDialog(Context context){
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customProgressDialog = newCustomProgressDialog(context,R.style.CustomProgressDialog);
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customProgressDialog.setContentView(R.layout.customprogressdialog);
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customProgressDialog.getWindow().getAttributes().gravity = Gravity.CENTER;
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return customProgressDialog;
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}
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public void onWindowFocusChanged(boolean hasFocus){
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if (customProgressDialog == null){
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return;
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}
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ImageView imageView = (ImageView) customProgressDialog.findViewById(R.id.loadingImageView);
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AnimationDrawable animationDrawable = (AnimationDrawable) imageView.getBackground();
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animationDrawable.start();
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}
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/**
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*
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* [Summary]
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* setTitile 标题
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* @param strTitle
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* @return
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*
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*/
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public CustomProgressDialog setTitile(String strTitle){
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return customProgressDialog;
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}
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/**
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*
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* [Summary]
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* setMessage 提示内容
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* @param strMessage
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* @return
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*
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*/
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public CustomProgressDialog setMessage(String strMessage){
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TextView tvMsg = (TextView)customProgressDialog.findViewById(R.id.id_tv_loadingmsg);
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if (tvMsg != null){
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tvMsg.setText(strMessage);
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}
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return customProgressDialog;
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}
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}
5.接下来就是写一个测试activity调用我们的progressDialog了。
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package com.lxd.activity;
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import com.lxd.widgets.CustomProgressDialog;
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import android.app.Activity;
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import android.os.AsyncTask;
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import android.os.Bundle;
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import android.view.Window;
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import android.view.WindowManager;
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public class MainFrame extends Activity {
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private MainFrameTask mMainFrameTask = null;
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private CustomProgressDialog progressDialog = null;
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@Override
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public void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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this.requestWindowFeature(Window.FEATURE_NO_TITLE);
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this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
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WindowManager.LayoutParams.FLAG_FULLSCREEN);
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setContentView(R.layout.main);
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mMainFrameTask = new MainFrameTask(this);
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mMainFrameTask.execute();
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}
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@Override
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protected void onDestroy() {
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stopProgressDialog();
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if (mMainFrameTask != null && !mMainFrameTask.isCancelled()){
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mMainFrameTask.cancel(true);
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}
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super.onDestroy();
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}
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private void startProgressDialog(){
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if (progressDialog == null){
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progressDialog = CustomProgressDialog.createDialog(this);
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progressDialog.setMessage("正在加载中...");
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}
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progressDialog.show();
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}
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private void stopProgressDialog(){
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if (progressDialog != null){
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progressDialog.dismiss();
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progressDialog = null;
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}
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}
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public class MainFrameTask extends AsyncTask<Integer, String, Integer>{
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private MainFrame mainFrame = null;
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public MainFrameTask(MainFrame mainFrame){
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this.mainFrame = mainFrame;
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}
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@Override
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protected void onCancelled() {
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stopProgressDialog();
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super.onCancelled();
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}
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@Override
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protected Integer doInBackground(Integer... params) {
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try {
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Thread.sleep(10 * 1000);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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return null;
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}
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@Override
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protected void onPreExecute() {
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startProgressDialog();
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}
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@Override
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protected void onPostExecute(Integer result) {
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stopProgressDialog();
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}
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}
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}
[/size]