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效果图

简单到直接贴代码

//声明一个进度条对话框对象
ProgressDialog mProgressDialog;
//构造对象
mProgressDialog = new ProgressDialog(AtoolsActivity.this);
//设置进度条参数
mProgressDialog.setTitle("提醒");
mProgressDialog.setMessage("稍安勿躁。。正在备份");
mProgressDialog.setProgressStyle(ProgressDialog.STYLE_HORIZONTAL);
//显示进度条
mProgressDialog.show();
//设置最大值
mProgressDialog.setMax(size);
//设置进度
mProgressDialog.setProgress(10);
//关闭对话框
mProgressDialog.dismiss();