Android 权限 - 无法连接到互联网

Question

我有问题。我有这个清单：

<?xml version="1.0" encoding="utf-8"?>

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



<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="Svět Androida"
    android:theme="@style/MyMaterialTheme">

    <uses-sdk
        android:minSdkVersion="15"
        android:targetSdkVersion="22"/>
    <activity
        android:name=".welcomescreen"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity android:name=".MainActivity">

    </activity>

    <activity
        android:name=".Cteni"
        android:parentActivityName=".MainActivity" >
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".MainActivity" />
    </activity>
</application>

应用程序运行良好，但当我想要生成 apk 时。它说

uses-sdk must be child of manifest

所以我改成这样：

<?xml version="1.0" encoding="utf-8"?>

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

<uses-sdk
    android:minSdkVersion="15"
    android:targetSdkVersion="22"/>

<application
    android:allowBackup="true"
    android:icon="@drawable/ic_launcher"
    android:label="Svět Androida"
    android:theme="@style/MyMaterialTheme">
    <activity
        android:name=".welcomescreen"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>

    <activity android:name=".MainActivity">

    </activity>

    <activity
        android:name=".Cteni"
        android:parentActivityName=".MainActivity" >
        <meta-data
            android:name="android.support.PARENT_ACTIVITY"
            android:value=".MainActivity" />
    </activity>
</application>

我成功生成了 apk，但是当我启动应用程序时它停止了，因为它无法连接到互联网。

编辑：

link 清单上：

https://onedrive.live.com/prev?id=9637B6BAC6554B19%211922&cid=9637B6BAC6554B19&parId=9637B6BAC6554B19%21109&group=0&v=TextFileEditor

这是错误的日志：

08-04 11:15:02.966    2888-2888/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: simaproject.com.svetandroida, PID: 2888
java.lang.RuntimeException: Unable to start activity ComponentInfo{simaproject.com.svetandroida/simaproject.com.svetandroida.MainActivity}: android.os.NetworkOnMainThreadException
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2325)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
        at android.app.ActivityThread.access0(ActivityThread.java:151)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:135)
        at android.app.ActivityThread.main(ActivityThread.java:5254)
        at java.lang.reflect.Method.invoke(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:372)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)
 Caused by: android.os.NetworkOnMainThreadException
        at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1147)
        at java.net.InetAddress.lookupHostByName(InetAddress.java:418)
        at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
        at java.net.InetAddress.getAllByName(InetAddress.java:215)
        at com.android.okhttp.HostResolver.getAllByName(HostResolver.java:29)
        at com.android.okhttp.internal.http.RouteSelector.resetNextInetSocketAddress(RouteSelector.java:232)
        at com.android.okhttp.internal.http.RouteSelector.next(RouteSelector.java:124)
        at com.android.okhttp.internal.http.HttpEngine.connect(HttpEngine.java:272)
        at com.android.okhttp.internal.http.HttpEngine.sendRequest(HttpEngine.java:211)
        at com.android.okhttp.internal.http.HttpURLConnectionImpl.execute(HttpURLConnectionImpl.java:382)
        at com.android.okhttp.internal.http.HttpURLConnectionImpl.getResponse(HttpURLConnectionImpl.java:332)
        at com.android.okhttp.internal.http.HttpURLConnectionImpl.getInputStream(HttpURLConnectionImpl.java:199)
        at java.net.URL.openStream(URL.java:470)
        at simaproject.com.svetandroida.MainActivity.nactiData(MainActivity.java:78)
        at simaproject.com.svetandroida.MainActivity.onCreate(MainActivity.java:57)
        at android.app.Activity.performCreate(Activity.java:5990)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1106)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2278)
            at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2387)
            at android.app.ActivityThread.access0(ActivityThread.java:151)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1303)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:135)
            at android.app.ActivityThread.main(ActivityThread.java:5254)
            at java.lang.reflect.Method.invoke(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:372)

请帮忙。谢谢。

Answer 1

错误消息非常简单明了：

uses-sdk must be child of manifest

您的清单文件格式不正确且缺少 <manifest>。请参阅文档：https://developer.android.com/guide/topics/manifest/manifest-intro.html

Answer 2

如果您使用 Android Studio，请删除此行

<uses-sdk
    android:minSdkVersion="15"
    android:targetSdkVersion="22"/>

因为这出现在 build.gradle 中的 y Gradle 脚本中（模块：app）

Answer 3

你的错误不是权限，你的错误是这个 "Caused by: android.os.NetworkOnMainThreadException" 这意味着你尝试在主线程中做某事，如果你咨询网络服务或在异步任务中做某事

Android 权限 - 无法连接到互联网

Android permission - can't connect to internet

permissions

android

android-manifest