Android的常见错误及解决办法



	 

	
		一、错误：Unknown host api.tudou.com, throwing UnknownHostException。
	
		      解决办法：在AndroidManifest.xml中添加
	
		二、Unable to find explicit activity class  have you declared this activity in your AndroidManifest.xml?
	
		     解决办法：在AndroidManifest.xml的application段添加声明：,详情见：
	
		                    http://stackoverflow.com/questions/736571/using-intent-in-an-android-application-to-show-another-activity
	
		三、ListActivity setContentView错误：
	
		代码及相关xml如下：
	
		main.xml:
	
		 
	
		            android:layout_width="fill_parent"
	
		            android:layout_height="fill_parent"
	
		            android:drawSelectorOnTop="false"/>
	
		tudouPlayer.java:
	
		public class tudouPlayer extends ListActivity implements OnClickListener {  
	
		  
	
		    @Override
	
		    public void onCreate(Bundle savedInstanceState) {
	
		        super.onCreate(savedInstanceState);
	
		        setContentView(R.layout.main);
	
		    }
	
		}
	
		编译不会报错，运行时，adb打出来的错误为：
	
		E/AndroidRuntime(  701): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.java.tudouPlayer/com.java.tudouPlayer.tudouPlayer}: java.lang.RuntimeException: Your content must have a ListView whose id attribute is 'android.R.id.list'
	
		解决办法：
	
		将main.xml中，上面贴出来的那段改为（原因见注释）：            
	
		       
	
		       <!-- Here is the list. Since we are using a ListActivity, we
	
		             have to call it "@android:id/list" so ListActivity will
	
		             find it -->
	
		      
	
		        <ListView android:id="@android:id/list"（在ListActivity中的main.xml中不能用android:id = "@+id/list"来加list的id，不然adb 也会报错setContentView(R.layout.main);）
	
		            android:layout_width="fill_parent"
	
		            android:layout_height="fill_parent"
	
		            android:drawSelectorOnTop="false"/>
	
		 
	
		摘自Tony的攻城学习博客

补充：移动开发 , Android ,