Android HttpClient錯誤

Question

我正在爲android開發一個應用程序，並且我嘗試了大部分（如果不是全部）從URL獲取網頁內容的方法。

我所使用的代碼是：

public void login(View view) throws ClientProtocolException, IOException { 
    Logger logger = Logger.getLogger("schedulous"); 
    logger.info("BUTTON CLICKED"); 

    HttpGet request = new HttpGet("http://www.google.com/"); 
    HttpClient httpClient = new DefaultHttpClient(); 
    HttpResponse response = httpClient.execute(request); 
    HttpEntity entity = response.getEntity(); 
    String entityContents = EntityUtils.toString(entity); 
    logger.info(entityContents); 
} 

而我得到的錯誤是：

09-09 17:47:02.021: E/AndroidRuntime(1611): FATAL EXCEPTION: main 
09-09 17:47:02.021: E/AndroidRuntime(1611): java.lang.IllegalStateException: Could not execute method of the activity 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.view.View$1.onClick(View.java:3591) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.view.View.performClick(View.java:4084) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.view.View$PerformClick.run(View.java:16966) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.os.Handler.handleCallback(Handler.java:615) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.os.Handler.dispatchMessage(Handler.java:92) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.os.Looper.loop(Looper.java:137) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.app.ActivityThread.main(ActivityThread.java:4745) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at java.lang.reflect.Method.invoke(Method.java:511) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:786) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at dalvik.system.NativeStart.main(Native Method) 
09-09 17:47:02.021: E/AndroidRuntime(1611): Caused by: java.lang.reflect.InvocationTargetException 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at java.lang.reflect.Method.invokeNative(Native Method) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at java.lang.reflect.Method.invoke(Method.java:511) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.view.View$1.onClick(View.java:3586) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  ... 11 more 
09-09 17:47:02.021: E/AndroidRuntime(1611): Caused by: android.os.NetworkOnMainThreadException 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at java.net.InetAddress.getAllByName(InetAddress.java:214) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:555) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:465) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  at com.schedulous.me.Main.login(Main.java:41) 
09-09 17:47:02.021: E/AndroidRuntime(1611):  ... 14 more 

我也向你保證，我在清單中設置適當的權限。

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

Answer 1

java.lang.IllegalStateException: Could not execute method of the activity 09-09 17:47:02.021: E/AndroidRuntime(1611): at android.view.View$1.onClick. 

我認爲你正在運行Android4，或2.3以上版本至少，你必須保持至極忙碌的應用程序的動作（點擊按鈕），如可能有聯網或東西，下一次單擊不能由Andoid

有處理

是：

Caused by: android.os.NetworkOnMainThreadException 

執行Netwoking在後臺線程請。您也可以查看here以獲取更詳細的解釋，並且搜索NetworkOnMainThreadException將會給出不錯的結果。