问Xamarin:无法满足多个设备的需要，无法编辑一个最初只为一个设备服务的现有项目。

EN

<!--<supports-screens android:resizeable="true"
                    android:smallScreens="true"
                    android:normalScreens="true"
                    android:largeScreens="true"
                    android:xlargeScreens="true"
                    android:largestWidthLimitDp="840"/>-->

  <compatible-screens>
    <screen android:screenSize="small" android:screenDensity="ldpi" />
    <screen android:screenSize="small" android:screenDensity="mdpi" />
    <screen android:screenSize="small" android:screenDensity="hdpi" />
    <screen android:screenSize="small" android:screenDensity="xhdpi" />
    <screen android:screenSize="small" android:screenDensity="280" />
    <screen android:screenSize="small" android:screenDensity="360" />
    <screen android:screenSize="small" android:screenDensity="420" />
    <screen android:screenSize="small" android:screenDensity="480" />
    <screen android:screenSize="small" android:screenDensity="560" />

    <screen android:screenSize="normal" android:screenDensity="ldpi" />
    <screen android:screenSize="normal" android:screenDensity="mdpi" />
    <screen android:screenSize="normal" android:screenDensity="hdpi" />
    <screen android:screenSize="normal" android:screenDensity="xhdpi" />
    <screen android:screenSize="normal" android:screenDensity="280" />
    <screen android:screenSize="normal" android:screenDensity="360" />
    <screen android:screenSize="normal" android:screenDensity="420" />
    <screen android:screenSize="normal" android:screenDensity="480" />
    <screen android:screenSize="normal" android:screenDensity="560" />

    <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="large" android:screenDensity="280" />
    <screen android:screenSize="large" android:screenDensity="360" />
    <screen android:screenSize="large" android:screenDensity="420" />
    <screen android:screenSize="large" android:screenDensity="480" />
    <screen android:screenSize="large" android:screenDensity="560" />

    <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" />
    <screen android:screenSize="xlarge" android:screenDensity="280" />
    <screen android:screenSize="xlarge" android:screenDensity="360" />
    <screen android:screenSize="xlarge" android:screenDensity="420" />
    <screen android:screenSize="xlarge" android:screenDensity="480" />
    <screen android:screenSize="xlarge" android:screenDensity="560" />
  </compatible-screens>