Android入门练习——对话框与列表的使用

太过爱你忘了你带给我的痛 2022-02-03 09:11 247阅读 0赞

**效果描述：**

*  类似电话簿，点击某一联系人，在最上层显示其电话号码
 *  长按某一联系人，上方显示电话号码，同时弹出呼叫对话框

**效果图：**  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70][] ![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 1][]

**知识点：**

*  listview组件的使用
 *  构建两个数组，一个数组用于存放姓名，另一个数组对应存放电话号码。通过position参数来获取下标。
 *  设置TextView的内容，使用setText(String)方法。
 *  上下文菜单ContextMenuDemo的使用

**代码：**  
Layout中：

Mainactivity中：

public class MainActivity extends Activity { 
    	private String[] data={ "关羽","张飞","刘备","曹操","诸葛亮","司马懿","刘邦","小乔","貂蝉"};
    	private String[] pho={ "13659850262","13626656662","1522650262","15555250262","13650000062","1365900002","1322999982","13659850262","13659850262"};
    	private ListView lv;
    	private TextView mytv1;
        @Override
        protected void onCreate(Bundle savedInstanceState) { 
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            
            lv=(ListView)findViewById(R.id.lv);
            mytv1=(TextView) findViewById(R.id.tv_result);
            this.registerForContextMenu(lv);
            ArrayAdapter<String> adapter=new ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_1, data);
    		ArrayAdapter<String>(MainActivity.this, android.R.layout.simple_list_item_single_choice, data);//单选按钮
            lv.setChoiceMode(ListView.CHOICE_MODE_SINGLE);
            lv.setAdapter(adapter);//建立listview和数据之间的关联
            
            lv.setOnItemClickListener(new OnItemClickListener() { 
            	
    			@Override
    			public void onItemClick(AdapterView<?> parent, View view, int position, long id) { 
    	
    				mytv1.setText(data[position]+"的电话是："+pho[position]；
    			}
    		});
            
            lv.setOnItemLongClickListener(new OnItemLongClickListener() { 
    
    			@Override
    			public boolean onItemLongClick(AdapterView<?> parent, View view,
    					int position, long id) { 
    				// TODO Auto-generated method stub
    				mytv1.setText(data[position]+"的电话是："+pho[position]);
    				return false;
    			}
    		});
                  
        }
        @Override
        public void onCreateContextMenu(ContextMenu menu, View v,
        		ContextMenuInfo menuInfo) { 
        	menu.add(1, 1, 1, "呼叫！");
    
        	super.onCreateContextMenu(menu, v, menuInfo);
        }}

**扩展：**  
可以和之前的ArrayAdapter 结合使用（[详见：Android入门练习——ArrayAdapter绑定ListView][Android_ArrayAdapter_ListView]），增加图标等等。

**效果图：**  
![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 2][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 3][]![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 4][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20190509092502977.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 1]: /images/20220203/60daf6baa5eb4afc845b7f0d07ddffa7.png
[Android_ArrayAdapter_ListView]: https://blog.csdn.net/qq_43145926/article/details/89403901
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20190509093252190.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20190509093357610.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzMTQ1OTI2_size_16_color_FFFFFF_t_70 4]: /images/20220203/70d35cf55ceb4fc2ac4c1a20bb532fc4.png