我是 Android 开发的初学者。我正在尝试开发一个管理 FB 事件的小型应用程序。当我尝试从 Graphfh API 获取事件时遇到这个问题
这是日志:
11-07 18:40:22.785: D/dalvikvm(418): GC_CONCURRENT freed 634K, 51% free 3331K/6727K, external 1660K/2137K, paused 4ms+5ms 11-07 18:40:23.235:D/dalvikvm(418):GC_CONCURRENT 释放 800K,51% 释放 3320K/6727K,外部 1660K/2137K,暂停 4ms+3ms 11-07 18:40:23.595: D/dalvikvm(418): GC_CONCURRENT freed 686K, 52% free 3275K/6727K, external 1660K/2137K, paused 4ms+3ms 11-07 18:40:23.715: W/System.err(418): java.io.FileNotFoundException: https://graph.facebook.com/me 11-07 18:40:23.726: W/System.err(418): 在 org.apache.harmony.luni.internal.net.www.protocol.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:521) 11-07 18:40:23.726: W/System.err(418): 在 org.apache.harmony.luni.internal.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(HttpsURLConnectionImpl.java:258) 11-07 18:40:23.726: W/System.err(418): 在 it.unisannio.flash.mobile.MainFragment.onSessionStateChange(MainFragment.java:79) 11-07 18:40:23.726: W/System.err(418): 在 it.unisannio.flash.mobile.MainFragment.access$0(MainFragment.java:68) 11-07 18:40:23.726: W/System.err(418): 在 it.unisannio.flash.mobile.MainFragment$1.call(MainFragment.java:116) 11-07 18:40:23.726: W/System.err(418): at com.facebook.Session$3$1.run(Session.java:1302) 11-07 18:40:23.726: W/System.err(418): 在 android.os.Handler.handleCallback(Handler.java:587) 11-07 18:40:23.726: W/System.err(418): 在 android.os.Handler.dispatchMessage(Handler.java:92) 11-07 18:40:23.726: W/System.err(418): 在 android.os.Looper.loop(Looper.java:130) 11-07 18:40:23.726: W/System.err(418): 在 android.app.ActivityThread.main(ActivityThread.java:3683) 11-07 18:40:23.726: W/System.err(418): 在 java.lang.reflect.Method.invokeNative(Native Method) 11-07 18:40:23.726: W/System.err(418): 在 java.lang.reflect.Method.invoke(Method.java:507) 11-07 18:40:23.726: W/System.err(418): 在 com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839) 11-07 18:40:23.735: W/System.err(418): 在 com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597) 11-07 18:40:23.735: W/System.err(418): at dalvik.system.NativeStart.main(Native Method) 11-07 18:40:25.314: D/dalvikvm(418): GC_CONCURRENT freed 621K, 52% free 3280K/6727K, external 2046K/2137K, paused 4ms+3ms 11-07 18:40:27.314: W/InputManagerService(60): 窗口已经聚焦,忽略焦点增益:com.android.internal.view.IInputMethodClient$Stub$Proxy@40761408 11-07 18:40:29.314: D/dalvikvm(295): GC_EXPLICIT 释放 637K,40% 释放 7291K/12039K,外部 1625K/2137K,暂停 104ms 11-07 18:41:27.998: I/dalvikvm(295): Jit: 将 JitTable 的大小从 2048 调整为 4096
这是代码:
try {
URL url = new URL("https://graph.facebook.com/me");
HttpsURLConnection connection = (HttpsURLConnection) url.openConnection();
BufferedReader read = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line = read.readLine();
String html = "";
while(line!=null) {
html += line;
line = read.readLine();
}
userInfoTextView.setText(line);
} catch(MalformedURLException ex) {
ex.printStackTrace();
} catch(IOException ioex) {
ioex.printStackTrace();
}