二次确认弹窗提示

AlertDialog.Builder builder = new AlertDialog.Builder(RescueDetailSureActivity.this);
        builder.setTitle("")
                .setMessage("信息未保存，是否退出？")
                .setPositiveButton("确定", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {
                        //做确定之后动作
                        finish();
                    }
                })
                .setNegativeButton("取消", new DialogInterface.OnClickListener() {
                    public void onClick(DialogInterface dialog, int id) {

                    }
                });
        builder.create().show();
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