android - “您的设备与此版本不兼容”

我在 Play 商店中放置了一个应用程序，我运行 4.1(Nexus 7) 的朋友在尝试安装我的应用程序时收到以下消息：“您的设备与此版本不兼容”。为什么这个来了？请任何人帮助我。

Manifeast file

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

< manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.ibkr.pcg"
      android:versionCode="3"
      android:versionName="1.1">

< uses-sdk android:minSdkVersion="7"  
      android:targetSdkVersion="8"/>
<uses-permission android:name="android.permission.INTERNET"></uses-permission> 
<uses-permission android:name="android.permission.CAMERA" />        
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" ></uses-permission>  

<!-- C2DM Permissions Start -->
 <!-- Only this application can receive the messages and registration result --> 
<permission android:name="com.ibkr.pcg.permission.C2D_MESSAGE" android:protectionLevel="signature" />
<uses-permission android:name="com.ibkr.pcg.permission.C2D_MESSAGE" /> 

 <!-- This app has permission to register and receive message -->
<uses-permission android:name="com.google.android.c2dm.permission.RECEIVE" />
<!-- End of the C2DM Permissions -->

<application android:icon="@drawable/pcgicon" 
    android:label="@string/app_name" 
    android:theme="@android:style/Theme.NoTitleBar.Fullscreen" 
    android:name="MyApplication"
    android:debuggable="true">
    <activity android:name=".PriceCheckGuruSplash"
              android:label="@string/app_name">      
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />
            <category android:name="android.intent.category.LAUNCHER" />    
        </intent-filter>  
    </activity>

     <!-- Only C2DM servers can send messages for the app. If permission is not set - any other app can generate it --> 
    <receiver
     android:name=".C2DMMessageReciever" android:permission="com.google.android.c2dm.permission.SEND" >
      <!-- Receive the actual message -->
     <intent-filter >
            <action android:name="com.google.android.c2dm.intent.RECEIVE" >  
            </action>
            <category android:name="com.ibkr.pcg" /> 
        </intent-filter>
    </receiver>

   <receiver
        android:name=".C2DMRegistrationReceiver"
        android:permission="com.google.android.c2dm.permission.SEND" >
        <intent-filter >
            <action android:name="com.google.android.c2dm.intent.REGISTRATION" >
            </action>
            <category android:name="com.ibkr.pcg" />
        </intent-filter>
    </receiver>

    <activity android:name="MessageReceivedActivty" android:screenOrientation="portrait"/>
    <activity android:name="LoginScreen" android:screenOrientation="portrait"> </activity>
    <activity android:name="RegistrationScreen" android:screenOrientation="portrait"> </activity>
    <activity android:name="ForgotPasswordScreen" android:screenOrientation="portrait"> </activity>
    <activity android:name="UserPreferences" android:screenOrientation="portrait"> </activity>
    <activity android:name="TrackedItems" android:screenOrientation="portrait"> </activity> 
    <activity android:name="WebPage" android:screenOrientation="portrait"> </activity>
    <activity android:name="CustomTabActivity" android:screenOrientation="portrait"> </activity>
    <activity android:name="TabGroup1Activity" android:screenOrientation="portrait"> </activity>
    <activity android:name="TabGroup2Activity" android:screenOrientation="portrait"> </activity>
    <activity android:name="TabGroup3Activity" android:screenOrientation="portrait"> </activity>
    <activity android:name="TabGroup4Activity" android:screenOrientation="portrait"> </activity>
    <activity android:name="SearchScreen" android:screenOrientation="portrait"> </activity>
    <activity android:name="SearchResultsScreen" android:screenOrientation="portrait"></activity>
    <activity android:name="ProductDisplay" android:screenOrientation="portrait"></activity>
    <activity android:name="VendorsDisplay" android:screenOrientation="portrait"></activity>
    <activity android:name="Filter" android:screenOrientation="portrait"></activity>
    <activity android:name="barcodeScanner" android:screenOrientation="portrait"></activity>
    <activity android:name="ScannerPage" android:screenOrientation="portrait"></activity> 
    <activity android:name="Linegraphpage" android:screenOrientation="landscape"></activity>        
    <activity android:name="org.achartengine.GraphicalActivity" android:screenOrientation="landscape"/> 
    <activity android:name="org.acra.CrashReportDialog"
    android:theme="@android:style/Theme.Dialog"
    android:launchMode="singleInstance"
    android:excludeFromRecents="true"
    android:finishOnTaskLaunch="true" />
</application>

清单>

//删除这个 android:targetSdkVersion="8"

Nexus 7 没有后置摄像头功能。

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

Note:如果您通过意图使用相机，您的应用程序不需要请求此权限。 相机功能 - 您的应用程序还必须声明相机功能的使用，例如：

  <uses-feature android:name="android.hardware.camera" />

有关相机功能的列表，请参阅清单功能参考。 将相机功能添加到清单中会导致 Google Play 阻止您的应用程序安装到不包含相机或不支持您指定的相机功能的设备上。了解更多信息 http://developer.android.com/guide/topics/media/camera.html#manifest

如果您的应用程序可以使用相机或相机功能来正常操作，但不需要它，您应该在清单中通过包含 android:required 属性并将其设置为 false 来指定这一点：

Note:你需要提及支持屏幕 https://stackoverflow.com/a/8428247/1012284