/**

 * Created by hanbao0928 on 2018/11/1.

 */

public class DialogUtils extends ProgressDialog {

    public DialogUtils(Context context) {

        super(context);

    }

    public DialogUtils(Context context, int theme) {

        super(context, theme);

    }

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        init(getContext());

    }

    private void init(Context context) {

        setCancelable(true);

        setCanceledOnTouchOutside(false);

        setContentView(R.layout.loading);//loading的xml文件

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

        params.width = WindowManager.LayoutParams.WRAP_CONTENT;

        params.height = WindowManager.LayoutParams.WRAP_CONTENT;

        getWindow().setAttributes(params);

    }

    @Override

    public void show() {//开启

        super.show();

    }

    @Override

    public void dismiss() {//关闭

        super.dismiss();

    }

}

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

    android:layout_width="100dp"

    android:layout_height="100dp"

    android:layout_gravity="center_horizontal"

    android:background="@drawable/shape_dialog_bg"//背景色

    android:layout_centerInParent="true"

    android:orientation="vertical">

    <RelativeLayout

        android:layout_width="match_parent"

        android:layout_height="wrap_content"

        android:layout_marginTop="10dp">

        <ProgressBar

            android:id="@+id/pb_load"

            android:layout_width="65dp"

            android:layout_height="65dp"

            android:indeterminateDrawable="@drawable/progressbar"//加载圈的样式

            android:layout_centerInParent="true"/>

    </RelativeLayout>

    <TextView

        android:id="@+id/tv_load_dialog"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:layout_gravity="center_horizontal"

        android:text="加载中..."

        android:textColor="#9a9b98"

        android:textSize="12sp"/>

</LinearLayout>

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

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

    <corners android:radius="8dp" />

    <solid android:color="#88000000" />

</shape>

<animated-rotate

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

    android:pivotX="50%" android:pivotY="50%"

    android:fromDegrees="0"

    android:toDegrees="720">

    <shape

        android:shape="ring"

        android:innerRadiusRatio="3"

        android:thicknessRatio="15"

        android:useLevel="false">

        <gradient

            android:type="sweep"

            android:useLevel="false"

            android:startColor="#55c6c6c6"

            android:centerColor="#c6c6c6"

            android:centerY="0.50"

            android:endColor="#c6c6c6" />

    </shape>

</animated-rotate>

<style name="CustomDialog" parent="Theme.AppCompat.Dialog">

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

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

</style>

public class MainActivity extends AppCompatActivity {

    private DialogUtils loading;

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_main);

    }

   public void loding(View v){//点击加载并按钮模仿网络请求

       loading = new DialogUtils(this,R.style.CustomDialog);

       loading.show();

       new Handler().postDelayed(new Runnable() {//定义延时任务模仿网络请求

           @Override

           public void run() {

        loading.dismiss();//3秒后调用关闭加载的方法

           }

       }, 1000);

   }

}