Question

我有一个需要向网页发出get请求的android应用程序。我的代码编译和运行没有任何问题，但尽管我想打电话我的程序停止响应

这是我的代码

public void Check_Login()
{
    HttpURLConnection connection = null;
    try {
        String link = "http://mobirep.co.za/server_scripts/check_login/check_login.php?username=andre&password=aaa";
        URL url = new URL(link);
        connection = (HttpURLConnection) url.openConnection();
        connection.connect();
        InputStream is = connection.getInputStream();
        int buffer;
        while((buffer = is.read()) != -1)
        {
           System.out.print(buffer);
            TextView tx = (TextView)findViewById(R.id.lblName);
            tx.setText(buffer);
        }

    } catch (MalformedURLException e1) {
        e1.printStackTrace();
    } catch (IOException e1) {
        e1.printStackTrace();
    } finally {
        if(null != connection) { connection.disconnect(); }
    }

这是我的日志：

05-13 08:13:59.607: I/Choreographer(891): Skipped 115 frames!  The application may be doing too much work on its main thread.
05-13 08:13:59.627: D/gralloc_goldfish(891): Emulator without GPU emulation detected.
05-13 08:14:00.048: I/Choreographer(891): Skipped 50 frames!  The application may be doing too much work on its main thread.
05-13 08:14:15.078: D/AndroidRuntime(891): Shutting down VM
05-13 08:14:15.078: W/dalvikvm(891): threadid=1: thread exiting with uncaught exception (group=0x40a71930)
05-13 08:14:15.138: E/AndroidRuntime(891): FATAL EXCEPTION: main
05-13 08:14:15.138: E/AndroidRuntime(891): android.os.NetworkOnMainThreadException
05-13 08:14:15.138: E/AndroidRuntime(891):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1117)
05-13 08:14:15.138: E/AndroidRuntime(891):  at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
05-13 08:14:15.138: E/AndroidRuntime(891):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
05-13 08:14:15.138: E/AndroidRuntime(891):  at java.net.InetAddress.getAllByName(InetAddress.java:214)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:70)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpConnection.<init>(HttpConnection.java:50)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpConnection$Address.connect(HttpConnection.java:340)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpConnectionPool.get(HttpConnectionPool.java:87)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpConnection.connect(HttpConnection.java:128)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpEngine.openSocketConnection(HttpEngine.java:316)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpEngine.connect(HttpEngine.java:311)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpEngine.sendSocketRequest(HttpEngine.java:290)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpEngine.sendRequest(HttpEngine.java:240)
05-13 08:14:15.138: E/AndroidRuntime(891):  at libcore.net.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:81)
05-13 08:14:15.138: E/AndroidRuntime(891):  at com.appmobirep.MainActivity.Check_Login(MainActivity.java:70)
05-13 08:14:15.138: E/AndroidRuntime(891):  at com.appmobirep.MainActivity$1.onClick(MainActivity.java:35)
05-13 08:14:15.138: E/AndroidRuntime(891):  at android.view.View.performClick(View.java:4204)
05-13 08:14:15.138: E/AndroidRuntime(891):  at android.view.View$PerformClick.run(View.java:17355)
05-13 08:14:15.138: E/AndroidRuntime(891):  at android.os.Handler.handleCallback(Handler.java:725)
05-13 08:14:15.138: E/AndroidRuntime(891):  at android.os.Handler.dispatchMessage(Handler.java:92)
05-13 08:14:15.138: E/AndroidRuntime(891):  at android.os.Looper.loop(Looper.java:137)
05-13 08:14:15.138: E/AndroidRuntime(891):  at android.app.ActivityThread.main(ActivityThread.java:5041)
05-13 08:14:15.138: E/AndroidRuntime(891):  at java.lang.reflect.Method.invokeNative(Native Method)
05-13 08:14:15.138: E/AndroidRuntime(891):  at java.lang.reflect.Method.invoke(Method.java:511)
05-13 08:14:15.138: E/AndroidRuntime(891):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793)
05-13 08:14:15.138: E/AndroidRuntime(891):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560)
05-13 08:14:15.138: E/AndroidRuntime(891):  at dalvik.system.NativeStart.main(Native Method)
05-13 08:19:15.257: I/Process(891): Sending signal. PID: 891 SIG: 9

请你帮我解决这个错误=）

Answer 1

问题在这一行详细说明：

05-13 08:14:15.138: E/AndroidRuntime(891): android.os.NetworkOnMainThreadException

＆＃34;网络主线程异常＆＃34;。这意味着，您无法在UI线程中进行任何网络调用，因为如果这样做，UI将停止更新。

您需要做的是使用某种类型的线程方法。 Android中常见的是AsyncTask：http://developer.android.com/reference/android/os/AsyncTask.html

Java对网站进行html调用

1 个答案: