<?xml version="1.0" encoding="utf-8"?>

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

     <solid android:color="@color/black" />

     <corners android:radius="10dp" />

 </shape>

 <?xml version="1.0" encoding="utf-8"?>

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

     android:id="@+id/layout_my_dialog_cahce"

     android:layout_width="wrap_content"

     android:layout_height="wrap_content"

     android:paddingTop="30dp"

     android:paddingBottom="20dp"

     android:paddingLeft="70dp"

     android:paddingRight="70dp"

     android:background="@drawable/my_dialog_cache_bg"

     android:gravity="center"

     android:orientation="vertical" >

     <ImageView

         android:src="@drawable/my_center_dialog_ok"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content" />

     <TextView

         android:text="清除成功"

         android:textColor="@color/white2"

         android:textSize="16sp"

         android:layout_marginTop="10dp"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content" />

 </LinearLayout>

 Toast toast = new Toast(mActivity);

 View view = LayoutInflater.from(mActivity).inflate(R.layout.my_center_cache_dialog, null);

   LinearLayout layout_my_dialog_cahce = (LinearLayout) view.findViewById(R.id.layout_my_dialog_cahce);

   layout_my_dialog_cahce.getBackground().setAlpha(95);

   toast.setView(view);

   toast.setGravity(Gravity.CENTER, 0, 0);

   toast.show();