我无法在Android应用程序中打开http连接。打开http连接:android.os.NetworkOnMainThreadException
这里是我的Android Studio代码:
try {
String address = "http://example.com/test.php";
URL url = new URL(address);
HttpURLConnection httpURLConnection = (HttpURLConnection) url.openConnection();
httpURLConnection.setRequestMethod("POST");
httpURLConnection.setDoOutput(true);
httpURLConnection.connect();
//Crashes on this.
OutputStream OS = httpURLConnection.getOutputStream();
//////////////////////////////////////////////////////
BufferedWriter bufferedWriter = new BufferedWriter(new OutputStreamWriter(OS, "UTF-8"));
String data = URLEncoder.encode("x", "UTF-8") + "=" + URLEncoder.encode(String.valueOf(10), "UTF-8");
bufferedWriter.write(data);
bufferedWriter.flush();
bufferedWriter.close();
OS.close();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
我崩溃:
04-24 16:48:24.848 13860-13860/com.example.benas.testingpurposes E/AndroidRuntime:致命例外:main 进程:com.example.benas.testingpurposes,PID:13860 java.lang.RuntimeException:无法启动活动ComponentInfo {com.example.benas.testingpurposes/com.example.benas.testingpurposes.MainActivity}: android.os.NetworkOnM ainThreadException at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2658) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2723) at android.app.ActivityThread.access $ 900(ActivityThread.java:172)在Android.app.ActivityThread处使用$ H.handleMessage(ActivityThread.java:1422) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main(ActivityThread.java:5832) at java.lang.reflect.Method.invoke(Native Method) 在java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1399) at com.android.internal.os.ZygoteInit 。主要(ZygoteInit.java:1194) 产生的原因:在java.net.InetAddress.lookupHostByName(InetAddress.java在android.os.StrictMode $ AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147) android.os.NetworkOnMainThreadException : (InetAddress.java:215) at com.android.okhttp.HostResolver $ 1.getAll() ByName(HostResolver.java:29) at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:232) at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java: 124) 在com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:361) 在com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:289) 在融为一体。 android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:373) at com.android.okhttp.internal.http.HttpURLConnectionImpl.connect(HttpURLConnectionImpl.java:106) at com.example.benas.testingpurposes。 MainActivity.onCreate(马inActivity.java:34) at android.app.Activity.performCreate(Activity.java:6221) at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1119) at android.app.ActivityThread.performLaunchActivity(ActivityThread。 java:2611) at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2723) at android.app.ActivityThread.access $ 900(ActivityThread.java:172) at android.app.ActivityThread $ H.handleMessage(ActivityThread 。(android.app.ActivityThread.main(ActivityThread.java:java:1422) at android.os.Handler.dispatchMessage(Handler.java:102) at android.os.Looper.loop(Looper.java:145) at android.app.ActivityThread.main 5832) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run (ZygoteInit.java:1399) 在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1194)
I”米坚持下去,任何帮助,将不胜感激
使用MySQLi准备语句。 阅读此链接http://php.net/manual/en/mysqli.quickstart.prepared-statements.php。 在插入数据库之前也要跳过输入数据。 http://php.net/manual/en/mysqli.real-escape-string.php –