线索是在logcat的：

The clue is in the logcat:

Caused by: java.lang.SecurityException: Permission denied (missing INTERNET permission?)

您缺少 android.permission.INTERNET对许可，您AndroidManifest。加入这一行：

You are missing android.permission.INTERNET permission in your AndroidManifest. Add this line:

<uses-permission android:name="android.permission.INTERNET"></uses-permission>

刚刚如下：

<uses-sdk
    android:minSdkVersion="8"
    android:targetSdkVersion="18" />