Android报错：java.io.IOException: R

工程运行时报错：

Installation did not succeed.
The application could not be installed.

java.io.IOException: Requested internal only, but not enough space at android.util.ExceptionUtils.wr
或者
Session 'app': Installation did not succeed. The application could not be installed. Retry

问题原因：1.手机内存不足，2.Android studio开发工具有缓存太多，
解决办法：
1.清理出多余的手机空间；
2,Android studio 打开build ——> clean projct

希望可以帮助遇到此问题的孩童们！！！