首先我们看一下什么叫做透明的进度对话框：

接下来我们讲一下如何创建:

1、使用Eclipse创建一个新的Andr​​oid 项目，使用Android 2.2或以上。

2、在/res/layout文件夹，创建线性布局activity_main.xml文件,主要是为了添加一个文本标签和一个按钮

复制代码 代码如下:

activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"

android:layout_width="match_parent"

android:layout_height="match_parent"

android:orientation="vertical">

<TextView

android:layout_width="match_parent"

android:layout_height="wrap_content"

android:gravity="center_horizontal"

android:padding="8dp"

android:textSize="20sp"

android:text="Transparent Progress Indicator" />

<Button

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:text="Check it out!"

android:layout_marginTop="40dp"

android:layout_gravity="center"

android:id="@+id/the_button" />

</LinearLayout>

3、在/res/values中打开styles.xml,在这里将添加透明对话框的样式。请务必指定父属性，否则你在运行时会出现问题

复制代码 代码如下:

styles.xml

<resources>

<>

<style name="AppBaseTheme" parent="android:Theme.Light">

<>

</style>

<>

<style name="AppTheme" parent="AppBaseTheme">

<>

</style>

<>

<style name="TransparentProgressDialog" parent="@android:Theme.Dialog">

<item name="android:windowFrame">@null</item>

<item name="android:windowBackground">@android:color/transparent</item>

<item name="android:windowIsFloating">true</item>

<item name="android:windowContentOverlay">@null</item>

<item name="android:windowTitleStyle">@null</item>

<item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item>

<item name="android:windowSoftInputMode">stateUnspecified|adjustPan</item>

<item name="android:backgroundDimEnabled">true</item>

<item name="android:background">@android:color/transparent</item>

</style>

</resources>

4、 在/res中间添加一个动态旋转的动画图片:

5、现在可以实现您的MainActivity.java文件了

复制代码 代码如下:

MainActivity.java

package com.authorwjf.transparentprogressdialog;

import android.os.Bundle;

import android.os.Handler;

import android.app.Activity;

import android.app.Dialog;

import android.content.Context;

import android.view.Gravity;

import android.view.View;

import android.view.View.OnClickListener;

import android.view.ViewGroup.LayoutParams;

import android.view.WindowManager;

import android.view.animation.Animation;

import android.view.animation.LinearInterpolator;

import android.view.animation.RotateAnimation;

import android.widget.ImageView;

import android.widget.LinearLayout;

public class MainActivity extends Activity implements OnClickListener {

private TransparentProgressDialog pd;

private Handler h;

private Runnable r;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

h = new Handler();

pd = new TransparentProgressDialog(this, R.drawable.spinner);

r =new Runnable() {

@Override

public void run() {

if (pd.isShowing()) {

pd.dismiss();

}

}

};

findViewById(R.id.the_button).setOnClickListener(this);

}

@Override

public void onClick(View v) {

pd.show();

h.postDelayed(r,5000);

}

@Override

protected void onDestroy() {

h.removeCallbacks(r);

if (pd.isShowing() ) {

pd.dismiss();

}

super.onDestroy();

}

}

6、以下是实现透明动画的代码

复制代码 代码如下:

private class TransparentProgressDialog extends Dialog {

private ImageView iv;

public TransparentProgressDialog(Context context, int resourceIdOfImage) {

super(context, R.style.TransparentProgressDialog);

WindowManager.LayoutParams wlmp = getWindow().getAttributes();

wlmp.gravity = Gravity.CENTER_HORIZONTAL;

getWindow().setAttributes(wlmp);

setTitle(null);

setCancelable(false);

setOnCancelListener(null);

LinearLayout layout = new LinearLayout(context);

layout.setOrientation(LinearLayout.VERTICAL);

LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);

iv = new ImageView(context);

iv.setImageResource(resourceIdOfImage);

layout.addView(iv, params);

addContentView(layout, params);

}

@Override

public void show() {

super.show();

RotateAnimation anim = new RotateAnimation(0.0f, 360.0f , Animation.RELATIVE_TO_SELF, .5f, Animation.RELATIVE_TO_SELF, .5f);

anim.setInterpolator(new LinearInterpolator());

anim.setRepeatCount(Animation.INFINITE);

anim.setDuration(3000);

iv.setAnimation(anim);

iv.startAnimation(anim);

}

}

最后的结果是