Android仿微信进度弹出框的实现方法

package com.ruru.dialogproject; 
import android.app.Activity; 
import android.os.Bundle; 
import android.view.View; 
public class MainActivity extends Activity implements Runnable { 
 LoadingDialog dialog; 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.activity_main); 
  findViewById(R.id.btn_name).setOnClickListener(new View.OnClickListener() { 
   @Override 
   public void onClick(View view) { 
    dialog = new LoadingDialog(MainActivity.this); 
    dialog.setCanceledOnTouchOutside(false); 
    dialog.show(); 
    new Thread(MainActivity.this).start(); 
   } 
  }); 
 } 
 public void run() { 
  try { 
   Thread.sleep(5000); 
   dialog.dismiss(); 
  } catch (InterruptedException e) { 
   e.printStackTrace(); 
  } 
 } 
} 

<?xml version="1.0" encoding="utf-8"?> 
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" 
 xmlns:tools="http://schemas.android.com/tools" 
 android:id="@+id/activity_main" 
 android:layout_width="match_parent" 
 android:layout_height="match_parent" 
 tools:context="com.ruru.dialogproject.MainActivity"> 
 <Button 
  android:id="@+id/btn_name" 
  android:layout_width="match_parent" 
  android:layout_height="wrap_content" 
  android:text="Hello World!" /> 
</RelativeLayout>

package com.ruru.dialogproject; 
import android.app.Dialog; 
import android.content.Context; 
import android.os.Bundle; 
import android.widget.LinearLayout; 
import android.widget.TextView; 
/** 
 * Created by 27c1 on 2017/1/4. 
 */ 
public class LoadingDialog extends Dialog { 
 private TextView tv; 
 /** 
  * style很关键 
  */ 
 public LoadingDialog(Context context) { 
  super(context, R.style.loadingDialogStyle); 
 } 
 @Override 
 protected void onCreate(Bundle savedInstanceState) { 
  super.onCreate(savedInstanceState); 
  setContentView(R.layout.dialog_loading); 
  tv = (TextView) findViewById(R.id.tv); 
  tv.setText("正在上传....."); 
  LinearLayout linearLayout = (LinearLayout) this.findViewById(R.id.LinearLayout); 
  linearLayout.getBackground().setAlpha(210); 
 } 
} 

<?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:background="@android:color/transparent" 
 android:orientation="vertical"> 
 <LinearLayout 
  android:id="@+id/LinearLayout" 
  android:layout_width="160dp" 
  android:layout_height="160dp" 
  android:background="@drawable/yuanjiao" 
  android:gravity="center" 
  android:orientation="vertical"> 
  <ProgressBar 
   android:id="@+id/progressBar1" 
   style="?android:attr/progressBarStyleInverse" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:layout_gravity="center" 
   android:background="@android:color/transparent" /> 
  <TextView 
   android:id="@+id/tv" 
   android:layout_width="wrap_content" 
   android:layout_height="wrap_content" 
   android:layout_gravity="center" 
   android:paddingTop="10dp" 
   android:textColor="#fff" /> 
 </LinearLayout> 
</LinearLayout> 

<style name="loadingDialogStyle" parent="android:Theme.Dialog"> 
  <item name="android:windowBackground">@android:color/transparent</item><!--设置dialog的背景--> 
  <item name="android:windowFrame">@null</item><!--Dialog的windowFrame框为无--> 
  <item name="android:windowNoTitle">true</item><!--是否显示title--> 
  <item name="android:windowIsFloating">true</item><!--是否浮现在activity之上--> 
  <item name="android:windowIsTranslucent">true</item><!--是否半透明--> 
  <item name="android:windowContentOverlay">@null</item><!--是否半透明--> 
  <item name="android:windowAnimationStyle">@android:style/Animation.Dialog</item><!-- 对话框是否有遮盖 --> 
  <item name="android:backgroundDimEnabled">false</item><!--背景是否模糊显示--> 
  <item name="android:backgroundDimAmount">0.6</item><!--背景的灰度--> 
 </style> 

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android"> 
 <solid android:color="#86222222" /> 
 <corners 
  android:bottomLeftRadius="10dp" 
  android:bottomRightRadius="10dp" 
  android:topLeftRadius="10dp" 
  android:topRightRadius="10dp" /> 
</shape>

<item name="android:windowFrame">@null</item> ：Dialog的windowFrame框为无 
<item name="android:windowIsFloating">true</item>：是否浮现在activity之上 
<item name="android:windowIsTranslucent">false</item>:是否半透明 
<item name="android:windowNoTitle">true</item>:是否显示title 
<item name="android:windowBackground">@drawable/dia_bg</item>:设置dialog的背景 
<item name="android:backgroundDimEnabled">true</item>背景是否模糊显示 
<item name="android:backgroundDimAmount">0.6</item>背景的灰度