1. 首先在app的build.gradle中添加依赖
    compile 'com.github.f0ris.sweetalert:library:1.5.1'

  2. 这个时候同步一下项目会报一个错误，解决办法

    1. 在AndroidManifest.xml中manifest根标签添加
      xmlns:tools="http://schemas.android.com/tools"
    2. 在application标签下添加
      tools:replace="android:icon,android:theme,android:allowBackup"

  3. 使用代码

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    SweetAlertDialog pDialog = new SweetAlertDialog(this, SweetAlertDialog.PROGRESS_TYPE);
    pDialog.getProgressHelper().setBarColor(Color.parseColor("#A5DC86"));
    pDialog.setTitleText("Loading");
    pDialog.setCancelable(false);
    pDialog.show();
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//你可以通过SweetAlertDialog.getProgressHelper()调用materialish-progress中下面这些方法，来动态改变进度条的样式
 
resetCount()
isSpinning()
spin()
stopSpinning()
getProgress()
setProgress(float progress)
setInstantProgress(float progress)
getCircleRadius()
setCircleRadius(int circleRadius)
getBarWidth()
setBarWidth(int barWidth)
getBarColor()
setBarColor(int barColor)
getRimWidth()
setRimWidth(int rimWidth)
getRimColor()
setRimColor(int rimColor)
getSpinSpeed()
setSpinSpeed(float spinSpeed)
 
//只显示标题：
 
new SweetAlertDialog(this)
    .setTitleText("Here's a message!")
    .show();

//显示标题和内容：
 
new SweetAlertDialog(this)
    .setTitleText("Here's a message!")
    .setContentText("It's pretty, isn't it?")
    .show();

//显示异常样式：
 
new SweetAlertDialog(this, SweetAlertDialog.ERROR_TYPE)
    .setTitleText("Oops...")
    .setContentText("Something went wrong!")
    .show();

//显示警告样式：
 
new SweetAlertDialog(this, SweetAlertDialog.WARNING_TYPE)
    .setTitleText("Are you sure?")
    .setContentText("Won't be able to recover this file!")
    .setConfirmText("Yes,delete it!")
    .show();

//显示成功完成样式：
 
new SweetAlertDialog(this, SweetAlertDialog.SUCCESS_TYPE)
    .setTitleText("Good job!")
    .setContentText("You clicked the button!")
    .show();

//自定义头部图像：
 
new SweetAlertDialog(this, SweetAlertDialog.CUSTOM_IMAGE_TYPE)
    .setTitleText("Sweet!")
    .setContentText("Here's a custom image.")
    .setCustomImage(R.drawable.custom_img)
    .show();

//确认事件绑定：
 
new SweetAlertDialog(this, SweetAlertDialog.WARNING_TYPE)
    .setTitleText("Are you sure?")
    .setContentText("Won't be able to recover this file!")
    .setConfirmText("Yes,delete it!")
    .setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
        @Override
        public void onClick(SweetAlertDialog sDialog) {
            sDialog.dismissWithAnimation();
        }
    })
    .show();

//显示取消按钮及事件绑定：
 
new SweetAlertDialog(this, SweetAlertDialog.WARNING_TYPE)
    .setTitleText("Are you sure?")
    .setContentText("Won't be able to recover this file!")
    .setCancelText("No,cancel plx!")
    .setConfirmText("Yes,delete it!")
    .showCancelButton(true)
    .setCancelClickListener(new SweetAlertDialog.OnSweetClickListener() {
        @Override
        public void onClick(SweetAlertDialog sDialog) {
            sDialog.cancel();
        }
    })
    .show();

//确认后切换对话框样式：
 
new SweetAlertDialog(this, SweetAlertDialog.WARNING_TYPE)
    .setTitleText("Are you sure?")
    .setContentText("Won't be able to recover this file!")
    .setConfirmText("Yes,delete it!")
    .setConfirmClickListener(new SweetAlertDialog.OnSweetClickListener() {
        @Override
        public void onClick(SweetAlertDialog sDialog) {
            sDialog
                .setTitleText("Deleted!")
                .setContentText("Your imaginary file has been deleted!")
                .setConfirmText("OK")
                .setConfirmClickListener(null)
                .changeAlertType(SweetAlertDialog.SUCCESS_TYPE);
        }
    })
    .show();

参考：https://blog.csdn.net/taa1007/article/details/79551928