安卓学习0214

一时失言乱红尘 2023-07-05 11:57 17阅读 0赞

## 安卓教程 ##

###### 监听器代码： ######

在.xml中讲Button的id设置为button1  
在MainActivity.java中：

Button button=findViewById(R.id.button1);
            button.setOnClickListener(new View.OnClickListener() {
             
                    public void onClick(View v) {
                    Toast.makeText(MainActivity.this,"恭喜你，登录成功",Toast.LENGTH_LONG).show();
                }
            });

##### 全屏代码： #####

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  WindowManager.LayoutParams.FLAG_FULLSCREEN);

##### 单击选框，触发监听器，发出：你的性别是xx #####

![设置单选框的代码][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz_size_16_color_FFFFFF_t_70]\#\#\#\#\# 最开始运行出了错误，闪退的情况；然后通过在第一行代码后加一行：`rg=findById(R.id.rg)；`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz_size_16_color_FFFFFF_t_70 1]  
运行效果就是这样：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz_size_16_color_FFFFFF_t_70 2]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200214215936747.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200214224340993.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200214225445427.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM4NzU2NTYz,size_16,color_FFFFFF,t_70