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很關(guān)鍵   */  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("正在上傳.....");   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><!--設(shè)置dialog的背景-->   <item name="android:windowFrame">@null</item><!--Dialog的windowFrame框為無-->   <item name="android:windowNoTitle">true</item><!--是否顯示title-->   <item name="android:windowIsFloating">true</item><!--是否浮現(xiàn)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><!-- 對話框是否有遮蓋 -->   <item name="android:backgroundDimEnabled">false</item><!--背景是否模糊顯示-->   <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框為無 <item name="android:windowIsFloating">true</item>：是否浮現(xiàn)在activity之上 <item name="android:windowIsTranslucent">false</item>:是否半透明 <item name="android:windowNoTitle">true</item>:是否顯示title <item name="android:windowBackground">@drawable/dia_bg</item>:設(shè)置dialog的背景 <item name="android:backgroundDimEnabled">true</item>背景是否模糊顯示 <item name="android:backgroundDimAmount">0.6</item>背景的灰度