App开发中的Dialog对话框

1.绑定按钮监听事件

2.按钮点击时创建dialog对话框

@Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
        btn1 = (Button) findViewById(R.id.button1);
        btn1.setOnClickListener(this);
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.button1:
                createAlertDialog1();
        }
    }

    //创建提示信息的对话框
    private void createAlertDialog1() {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("删除");
        builder.setMessage("你真的要删除吗？");

        builder.setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(Main3Activity.this,"已删除",Toast.LENGTH_SHORT).show();
            }
        });

        builder.setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(Main3Activity.this,"操作已取消",Toast.LENGTH_SHORT).show();
            }
        });

        builder.show();
    }

运行结果如下：

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 列表选项框（其他与上面一致，只是创建内容不同）

 单选按钮选择对话框

多选按钮选择对话框