Android——弹出提示框

//页面返回时，弹出提示框，包括确认、取消按钮，提示文字
AlertDialog.Builder builder = new AlertDialog.Builder(this);
builder.setTitle("返回将丢失所做修改");
builder.setNegativeButton("那算了", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        dialog.dismiss();
    }
});
builder.setPositiveButton("依然返回", new DialogInterface.OnClickListener() {
    @Override
    public void onClick(DialogInterface dialog, int which) {
        backWithResult();
    }
});
builder.show();