一个对话框

package com.omi.utils;

import android.app.ProgressDialog;
import android.content.Context;
import android.os.Bundle;

import com.omi.R;

/**
 * Created by SensYang on 2017/05/08 15:30
 */

public class CustomProgressDialog extends ProgressDialog {

    public CustomProgressDialog(Context context) {
        super(context);
    }

    public CustomProgressDialog(Context context, int theme) {
        super(context, theme);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.dialog_progress);
    }

    public static CustomProgressDialog show(Context ctx){
        CustomProgressDialog d = new CustomProgressDialog(ctx);
        d.show();
        return d;
    }
}

xml文件：
<?xml version="1.0" encoding="UTF-8"?>
<ProgressBar xmlns:android="http://schemas.android.com/apk/res/android"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             android:interpolator="@android:anim/linear_interpolator" />