Android常见错误解析

一、错误：Unknown host api.tudou.com, throwing UnknownHostException。

      解决办法：在AndroidManifest.xml中添加<uses-permission android:name="android.permission.INTERNET" />

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：<activity android:name=".ActivityName" />,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:

<ListView android:id="@+id/list"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:drawSelectorOnTop="false"/>

tudouPlayer.java:

public class tudouPlayer extends ListActivity implements OnClickListener {   
    /** Called when the activity is first created. */
    @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"
            android:layout_width="fill_parent"
            android:layout_height="fill_parent"
            android:drawSelectorOnTop="false"/>

四、adb push错误

mksdcard 1024M sdcard1.iso

adb push android.jpg /sdcard/android.jpg

error:failed to copy 'android.jpg' to '/sdcard/android.jpg': Read-only file system

解决办法：

删除sdcard1.iso；

mksdcard 1024M sdcard

adb push android.jpg /sdcard/android.jpg