突然发现我的应用被google play表示为不支持Google Nexus 7。。。愤怒啊！
查原因分析后发现有以下几种可能：
1. 摄像头问题，Nexus7只有前置摄像头，所以如果应用中申请了权限<uses-permission android:name="android.permission.CAMERA"/>的话，为了支持Nexus7需要设置过滤特性<uses-feature android:name="android.hardware.camera" android:required="false" />。
2. 如果设置了类似如下的设置的话
[html]
<compatible-screens>
<screen android:screenSize="normal" android:screenDensity="mdpi"/>
<screen android:screenSize="normal" android:screenDensity="hdpi"/>
<screen android:screenSize="normal" android:screenDensity="xhdpi"/>
<screen android:screenSize="large" android:screenDensity="ldpi"/>
<screen android:screenSize="large" android:screenDensity="mdpi"/>
<screen android:screenSize="large" android:screenDensity="hdpi"/>
<screen android:screenSize="large" android:screenDensity="xhdpi"/>
<screen android:screenSize="xlarge" android:screenDensity="ldpi"/>
<screen android:screenSize="xlarge" android:screenDensity="mdpi"/>
<screen android:screenSize="xlarge" android:screenDensity="hdpi"/>
<screen android:screenSize="xlarge" android:screenDensity="xhdpi"/>
</compatible-screens>
<compatible-screens>
<screen android:screenSize="normal" android:screenDensity="mdpi"/>
<screen android:screenSize="normal" android:screenDensity="hdpi"/>
<screen android:screenSize="normal" android:screenDensity="xhdpi"/>
<screen android:screenSize="large" android:screenDensity="ldpi"/>
<screen android:screenSize="large" android:screenDensity="mdpi"/>
<screen android:screenSize="large" android:screenDensity="hdpi"/>
<screen android:screenSize="large" android:screenDensity="xhdpi"/>
<screen android:screenSize="xlarge" android:screenDensity="ldpi"/>
<screen android:screenSize="xlarge" android:screenDensity="mdpi"/>
<screen android:screenSize="xlarge" android:screenDensity="hdpi"/>
<screen android:screenSize="xlarge" android:screenDensity="xhdpi"/>
</compatible-screens>
因为N7的dpi不是上面所列出的项，所以被过滤掉了，而N7的dpi值应该是213，所以可以设置为固定值即可。
