Android入门练习——Spinner+AutoComplete(差效果图)

深碍√TFBOYSˉ_ 2022-02-14 01:15 201阅读 0赞

**Spinner下拉菜单：**  
效果图：  
![20190430145926134.gif][]  
Activity\_main.xml

MainActivity.java

public class MainActivity extends Activity { 
    	private Spinner spinner;
    	private String[] data={ "北京","天津","上海","广州","重庆","杭州","武汉","拉萨","沈阳"};
    	
    	@Override
    	protected void onCreate(Bundle savedInstanceState) { 
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		
    		spinner=(Spinner) findViewById(R.id.sp);
    		//将适配器与数据进行绑定
    		final ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_spinner_dropdown_item, data);
    		spinner.setAdapter(adapter);//将适配器的内容发送到spinner
    		//spinner.setSelection(2,true);直接选中指定项的数据
    		spinner.setOnItemSelectedListener(new OnItemSelectedListener() { 
    			@Override
    			public void onItemSelected(AdapterView<?> parent, View view, int position, long id) { 
    				String txt=adapter.getItem(position);
    				Toast.makeText(MainActivity.this, txt,Toast.LENGTH_SHORT).show();
    			}
    			@Override
    			public void onNothingSelected(AdapterView<?> parent) { 
    				// TODO Auto-generated method stub
    				
    			}
    			});
    	}
    }

--------------------

**AutoComplete自动补齐（搜索常用）：**  
效果图：  
(bu)

activity\_main.xml

MainActivity.java

public class MainActivity extends Activity { 
    	private String[] data={ "book","bike","box","camera","come","complete"};
    	private AutoCompleteTextView autoText;
    	@Override
    	protected void onCreate(Bundle savedInstanceState) { 
    		super.onCreate(savedInstanceState);
    		setContentView(R.layout.activity_main);
    		
    		autoText=(AutoCompleteTextView) findViewById(R.id.act);
    		ArrayAdapter<String> adapter=new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, data);
    		autoText.setAdapter(adapter);
    		
    		autoText.setOnItemClickListener(new OnItemClickListener() { 
    
    			@Override
    			public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
    				// TODO Auto-generated method stub
    				Toast.makeText(MainActivity.this, data[position], 0).show();
    			}
    		});	
    	}
    }

--------------------

Reflection:  
其实我一直以为做app的程序员很厉害，后来才知道，应用型的软件工程师最基础的，因为只是调用了各种封装好的方法而已。  
先把最基础的学好，之后再慢慢深入吧，现在的社会和科技更新这么快，可得好好加把劲了。

[20190430145926134.gif]: /images/20220214/ee422f5efe05426386f0375be6464ec5.png