Android ProgressDialog 控件自定义

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在项目中,我们经常需要通过网络请求去服务端获取相应的数据,以便于在客户端进行展示。而这个过程是需要网络的,因此就有了等待的过程。对于网络快的童靴,那么等待的时间就短;而对于网络慢的童靴,那么等待的时间就长。因此为了消除童靴们等待的焦虑感,我们需要显示一个progress dialog来提示童靴们,数据正在获取中,请稍候片刻。


先上效果图,效果图如下:

   


那么如何实现呢?直接上代码


1. 在anim文件夹下创建sf_progress_dialog_anim.xml,实现转动的效果:

<?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/sf_progress_1"        android:duration="200"/>    <item        android:drawable="@drawable/sf_progress_2"        android:duration="200"/>    <item        android:drawable="@drawable/sf_progress_3"        android:duration="200"/>    <item        android:drawable="@drawable/sf_progress_4"        android:duration="200"/>    <item        android:drawable="@drawable/sf_progress_5"        android:duration="200"/>    <item        android:drawable="@drawable/sf_progress_6"        android:duration="200"/>    <item        android:drawable="@drawable/sf_progress_7"        android:duration="200"/>    <item        android:drawable="@drawable/sf_progress_8"        android:duration="60"/></animation-list>
其中:android:oneshot表示动画只播放一次停留在最后一帧上,当设置为false时,则代表动画循环播放;否则,则代表动画只播放一次。

资源文件可到如下链接进行下载:

http://download.csdn.net/detail/shenjichao2008/8248073


2. 在values文件夹中创建style.xml,自定义progress dialog的样式:

<style name="SF_dialogCustom" 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="SF_pressDialogCustom" parent="@style/SF_dialogCustom">        <item name="android:windowBackground">@android:color/transparent</item>         <item name="android:windowNoTitle">true</item>    </style>

3. 在layout文件夹中创建sf_view_custom_progress_dialog.xml,自定义progress dilaog的布局:

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="horizontal" >    <ImageView        android:id="@+id/sf_iv_progress_dialog_loading"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:background="@anim/sf_progress_dialog_anim"        android:contentDescription="@string/sf_progress_dialog_image_loading" />    <TextView        android:id="@+id/sf_tv_progress_dialog_loading"        style="@style/SF_MediumLightGreyTxt"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_vertical" /></LinearLayout>

4. 创建SFProgrssDialog类,继承Dialog,实现如下:

package com.snapfish.view;import com.snapfish.R;import android.app.Dialog;import android.content.Context;import android.graphics.drawable.AnimationDrawable;import android.text.TextUtils;import android.view.Gravity;import android.widget.ImageView;import android.widget.TextView;public class SFProgrssDialog extends Dialog {private static SFProgrssDialog m_progrssDialog;private SFProgrssDialog(Context context, int theme) {super(context, theme);}public static SFProgrssDialog createProgrssDialog(Context context) {m_progrssDialog = new SFProgrssDialog(context,R.style.SF_pressDialogCustom);m_progrssDialog.setContentView(R.layout.sf_view_custom_progress_dialog);m_progrssDialog.getWindow().getAttributes().gravity = Gravity.CENTER;return m_progrssDialog;}@Overridepublic void onWindowFocusChanged(boolean hasFocus) {if (null == m_progrssDialog)return;ImageView loadingImageView = (ImageView) m_progrssDialog.findViewById(R.id.sf_iv_progress_dialog_loading);AnimationDrawable animationDrawable = (AnimationDrawable) loadingImageView.getBackground();animationDrawable.start();}public SFProgrssDialog setMessage(String msg) {TextView loadingTextView = (TextView) m_progrssDialog.findViewById(R.id.sf_tv_progress_dialog_loading);if (!TextUtils.isEmpty(msg))loadingTextView.setText(msg);elseloadingTextView.setText(R.string.sf_progress_dialog_image_loading);return m_progrssDialog;}}

5. 编写显示/隐藏 progress dialog的方法:

private SFProgrssDialog m_customProgrssDialog;final void showCustomProgrssDialog(String msg) {if (null == m_customProgrssDialog)m_customProgrssDialog = SFProgrssDialog.createProgrssDialog(m_parent);if (null != m_customProgrssDialog) {m_customProgrssDialog.setMessage(msg);m_customProgrssDialog.show();m_customProgrssDialog.setCancelable(false);}}final void hideCustomProgressDialog() {if (null != m_customProgrssDialog) {m_customProgrssDialog.dismiss();m_customProgrssDialog = null;}}

6. 在网络请求之前,调用showCustomProgrssDialog方法,传入显示的message;在网络响应之后,调用hideProgressDialog方法,消除progress dialog。


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