为什么我们在android中使用drawable v24？

[weixin_38050602]

我们在drawable v21中有一个可绘制的文件,也用于涟漪效果.那么为什么我们在获取矢量文件时使用drawable v24. 下面是xml文件ic_launcher_foreground.xml. <vector xmlns:android="http://schemas.android.com/apk/res/android" xmlns:aapt="http://schemas.android.com/aapt" android:width="108dp" android:height="108dp" android:viewportHeight="108" android:viewportWidth="108"> <path android:fillType="evenOdd" android:pathData="M32,64C32,64 38.39,52.99 44.13,50.95C51.37,48.37 70.14,49.57 70.14,49.57L108.26,87.69L108,109.01L75.97,107.97L32,64Z" android:strokeColor="#00000000" android:strokeWidth="1"> <aapt:attr name="android:fillColor"> <gradient android:endX="78.5885" android:endY="90.9159" android:startX="48.7653" android:startY="61.0927" android:type="linear"> <item android:color="#44000000" android:offset="0.0"/> <item android:color="#00000000" android:offset="1.0"/> </gradient> </aapt:attr> </path> <path android:fillColor="#FFFFFF" android:fillType="nonZero" android:pathData="M66.94,46.02L66.94,46.02C72.44,50.07 76,56.61 76,64L32,64C32,56.61 35.56,50.11 40.98,46.06L36.18,41.19C35.45,40.45 35.45,39.3 36.18,38.56C36.91,37.81 38.05,37.81 38.78,38.56L44.25,44.05C47.18,42.57 50.48,41.71 54,41.71C57.48,41.71 60.78,42.57 63.68,44.05L69.11,38.56C69.84,37.81 70.98,37.81 71.71,38.56C72.44,39.3 72.44,40.45 71.71,41.19L66.94,46.02ZM62.94,56.92C64.08,56.92 65,56.01 65,54.88C65,53.76 64.08,52.85 62.94,52.85C61.8,52.85 60.88,53.76 60.88,54.88C60.88,56.01 61.8,56.92 62.94,56.92ZM45.06,56.92C46.2,56.92 47.13,56.01 47.13,54.88C47.13,53.76 46.2,52.85 45.06,52.85C43.92,52.85 43,53.76 43,54.88C43,56.01 43.92,56.92 45.06,56.92Z" android:strokeColor="#00000000" android:strokeWidth="1"/> </vector>

[weixin_38067327]

不同的可绘制文件夹用于为设备兼容性和不同的Android版本提供不同的屏幕密度. See this answer for more details