Question

我试图通过简单的HttpClient访问网站及其抛出错误如下/我试图把它放在android清单 android.permission.INTERNET 中但仍然是它抛出相同的错误

      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1080)
            at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:573)
            at java.lang.Thread.run(Thread.java:841)
04-25 19:10:05.380  12689-12710/? E/Launcher.BadgeCache,﹕ Do not updateBadgeCounts!!, multiple data for appIndex=1
04-25 19:10:09.875    2346-2744/? E/DatabaseUtils﹕ Writing exception to parcel
    java.lang.SecurityException: Permission Denial: get/set setting for user asks to run as user -2 but is calling from user 0; this requires android.permission.INTERACT_ACROSS_USERS_FULL
            at com.android.server.am.ActivityManagerService.handleIncomingUser(ActivityManagerService.java:13140)
            at android.app.ActivityManager.handleIncomingUser(ActivityManager.java:2038)
            at com.android.providers.settings.SettingsProvider.callFromPackage(SettingsProvider.java:607)
            at android.content.ContentProvider$Transport.call(ContentProvider.java:279)
            at android.content.ContentProviderNative.onTransact(ContentProviderNative.java:273)
            at android.os.Binder.execTransact(Binder.java:388)
            at dalvik.system.NativeStart.run(Native Method)
04-25 19:10:10.405    2749-2749/com.example.innovator.httpclientapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
    java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.innovator.httpclientapp/com.example.innovator.httpclientapp.MainActivity}: android.os.NetworkOnMainThreadException
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2295)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
            at android.app.ActivityThread.access$700(ActivityThread.java:159)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:176)
            at android.app.ActivityThread.main(ActivityThread.java:5419)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: android.os.NetworkOnMainThreadException
            at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1144)
            at java.net.InetAddress.lookupHostByName(InetAddress.java:385)
            at java.net.InetAddress.getAllByNameImpl(InetAddress.java:236)
            at java.net.InetAddress.getAllByName(InetAddress.java:214)
            at org.apache.http.impl.conn.DefaultClientConnectionOperator.openConnection(DefaultClientConnectionOperator.java:137)
            at org.apache.http.impl.conn.AbstractPoolEntry.open(AbstractPoolEntry.java:164)
            at org.apache.http.impl.conn.AbstractPooledConnAdapter.open(AbstractPooledConnAdapter.java:119)
            at org.apache.http.impl.client.DefaultRequestDirector.execute(DefaultRequestDirector.java:360)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:670)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:509)
            at org.apache.http.impl.client.AbstractHttpClient.execute(AbstractHttpClient.java:487)
            at com.example.innovator.httpclientapp.MyHttpClient.getWebsiteResult(MyHttpClient.java:42)
            at com.example.innovator.httpclientapp.MainActivity.onCreate(MainActivity.java:28)
            at android.app.Activity.performCreate(Activity.java:5372)
            at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1104)
            at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2257)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2349)
            at android.app.ActivityThread.access$700(ActivityThread.java:159)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316)
            at android.os.Handler.dispatchMessage(Handler.java:99)
            at android.os.Looper.loop(Looper.java:176)
            at android.app.ActivityThread.main(ActivityThread.java:5419)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:525)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862)

以下是我的onCreateMethod

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // here instantiate a java class for retrieving the https url result
    MyHttpClient client =  new MyHttpClient();

    // read the input stream
    TextView textView =  (TextView)findViewById(R.id.tvResult);

    // setting the output to text view
    textView.setText(client.getWebsiteResult());
}

Answer 1

根据here的回答。

android.permission.INTERACT_ACROSS_USERS_FULL是签名级别   允许。您的应用将无法使用它，除非它   与系统具有相同的签名。

除非你是其中之一，否则你无法实现   创建者或系统构建，或与他们合作以便他们   愿意用他们的证书签署你的apk。换一种说法，   这对大多数开发人员来说是不受限制的。

然而，阅读你的loagcat和代码。

04-25 19:10:10.405    2749-2749/com.example.innovator.httpclientapp E/AndroidRuntime﹕ FATAL EXCEPTION: main
java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.innovator.httpclientapp/com.example.innovator.httpclientapp.MainActivity}: android.os.NetworkOnMainThreadException

以上错误表明无法在主线程上进行网络调用。因此，创建一个新线程并从该线程启动网络调用。它可能会解决您的问题。

new Thread() {
  public void run() {
    // your network call
  }
}.start();

如果你想要回调和内容，你也可以使用AsyncTask。

另外一个建议是，为了进行良好和快速的网络通话，您可以使用volley。这是我个人的最爱，非常容易使用！

Android需要android.permission.INTERACT_ACROSS_USERS_FULL

1 个答案: