搭配秀App开发中遇到的问题--笔记

从网上下载了个Demo，导进项目运行正常，自己写了一个一直报下面的这个错误！搜了一个很多人说：

11-04 15:33:45.810: E/AndroidRuntime(25140): FATAL EXCEPTION: main
11-04 15:33:45.810: E/AndroidRuntime(25140): java.lang.SecurityException: Permission denied (missing INTERNET permission?)
11-04 15:33:45.810: E/AndroidRuntime(25140): at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
11-04 15:33:45.810: E/AndroidRuntime(25140): at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
11-04 15:33:45.810: E/AndroidRuntime(25140): at java.net.InetAddress.getAllByName(InetAddress.java:214)
11-04 15:33:45.810: E/AndroidRuntime(25140): at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
11-04 15:33:45.810: E/AndroidRuntime(25140): at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
11-04 15:33:45.810: E/AndroidRuntime(25140): at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
11-04 15:33:45.810: E/AndroidRuntime(25140): at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
11-04 15:33:45.810: E/AndroidRuntime(25140): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555)
11-04 15:33:45.810: E/AndroidRuntime(25140): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
11-04 15:33:45.810: E/AndroidRuntime(25140): at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465)
11-04 15:33:45.810: E/AndroidRuntime(25140): at com.example.httpclienttest.MainActivity$2.onClick(MainActivity.java:62)
11-04 15:33:45.810: E/AndroidRuntime(25140): at android.view.View.performClick(View.java:4240)
11-04 15:33:45.810: E/AndroidRuntime(25140): at android.view.View$PerformClick.run(View.java:17721)
11-04 15:33:45.810: E/AndroidRuntime(25140): at android.os.Handler.handleCallback(Handler.java:730)
11-04 15:33:45.810: E/AndroidRuntime(25140): at android.os.Handler.dispatchMessage(Handler.java:92)
11-04 15:33:45.810: E/AndroidRuntime(25140): at android.os.Looper.loop(Looper.java:137)
11-04 15:33:45.810: E/AndroidRuntime(25140): at android.app.ActivityThread.main(ActivityThread.java:5103)
11-04 15:33:45.810: E/AndroidRuntime(25140): at java.lang.reflect.Method.invokeNative(Native Method)
11-04 15:33:45.810: E/AndroidRuntime(25140): at java.lang.reflect.Method.invoke(Method.java:525)
11-04 15:33:45.810: E/AndroidRuntime(25140): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
11-04 15:33:45.810: E/AndroidRuntime(25140): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
11-04 15:33:45.810: E/AndroidRuntime(25140): at dalvik.system.NativeStart.main(Native Method)
11-04 15:33:45.810: E/AndroidRuntime(25140): Caused by: libcore.io.GaiException: getaddrinfo failed: EAI_NODATA (No address associated with hostname)
11-04 15:33:45.810: E/AndroidRuntime(25140): at libcore.io.Posix.getaddrinfo(Native Method)
11-04 15:33:45.810: E/AndroidRuntime(25140): at libcore.io.ForwardingOs.getaddrinfo(ForwardingOs.java:61)
11-04 15:33:45.810: E/AndroidRuntime(25140): at java.net.InetAddress.lookupHostByName(InetAddress.java:405)
11-04 15:33:45.810: E/AndroidRuntime(25140): ... 21 more
11-04 15:33:45.810: E/AndroidRuntime(25140): Caused by: libcore.io.ErrnoException: getaddrinfo failed: EACCES (Permission denied)
11-04 15:33:45.810: E/AndroidRuntime(25140): ... 24 more

在android 2.3上设计的下载程序，在android 4.0上运行时报android.os.NetworkOnMainThreadException异常，原来在4.0中，访问网络不能在主程序中进行，有两个方法可以解决，一个是在主程序中增加：（来至：http://blog.csdn.net/luckyjda/article/details/8900211）。

 我的解决方法是在项目中的AndroidManifest.xml文件的 </application>下面

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

然后在setContentView(R.layout.activity_main);下面

添加

StrictMode.setThreadPolicy(new StrictMode.ThreadPolicy.Builder()
.detectDiskReads().detectDiskWrites().detectNetwork()
.penaltyLog().build());
StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder()
.detectLeakedSqlLiteObjects().detectLeakedClosableObjects()
.penaltyLog().penaltyDeath().build());

再次运行OK；