1.定义弹出的对话框的按钮和显示结果的文本框
<Button
    android:id="@+id/btn7"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:background="@drawable/btn_nine_selector"
    android:text="弹出对话提醒">
</Button>
<TextView
    android:id="@+id/text2"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">
</TextView>

2.代码

private TextView t1;

Buton btn7 = findViewById(R.id.btn7);
btn7.setOnClickListener(this::onClick);
t1 = findViewById(R.id.text2);

private void onClick(View view) {

    Log.d("点击数据", "onClick: ");
    //创建提醒对话框
    AlertDialog.Builder builder = new AlertDialog.Builder(this);
    //设置对话框标题
    builder.setTitle("尊敬的用户");
    //设置文本内容
    builder.setMessage("你要卸载我妈？");
    //设置肯定按钮监听
    builder.setPositiveButton("残忍卸载", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            t1.setText("确定卸载！");
        }
    });
    //设置否定按钮监听
    builder.setNegativeButton("我再想想", new DialogInterface.OnClickListener() {
        @Override
        public void onClick(DialogInterface dialog, int which) {
            t1.setText("继续使用！");
        }
    });

    //构建对话框
    AlertDialog dailog = builder.create();
    //显示对话框
    dailog.show();

}