AlertDialog.Builder builder =new AlertDialog.Builder(mActivity);

builder.setMessage(“内容”);// 设置内容

builder.setTitle("联系电话");// 设置标题

builder.setPositiveButton("拨打", new DialogInterface.OnClickListener() {

@SuppressLint("NewApi")

@Override

    public void onClick(DialogInterface dialog, int which) {

if (ContextCompat.checkSelfPermission(mActivity,

                Manifest.permission.CALL_PHONE)

!= PackageManager.PERMISSION_GRANTED) {

//没有授权，编写申请权限代码

            ActivityCompat.requestPermissions(mActivity, new String[]{Manifest.permission.CALL_PHONE}, 100);

        }else {

// 打电话

            Intent callintent =new Intent();

            callintent.setAction(Intent.ACTION_CALL);

            callintent.setData(Uri.parse("tel:" +phoneNumber));

            // 开启系统拨号器

            startActivity(callintent);

        }

}

});

builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {// 设置取消按钮

    @Override

    public void onClick(DialogInterface dialog, int which) {

dialog.dismiss();

    }

});

// 参数都设置完成了，创建并显示出来

builder.create();

builder.show();