替换sdk路径下/platforms/android-28/android.jar，能够解决在androidstudio看源码部分类报红及能够正常编译项目。解决替换as后报错：Failedtotransformfile'android.jar'tomatchattributes{artifactType=android-mockable-jar,returnDefaultValues=false}usingtransformMockableJarTransform