下载时，将文件转成字节时异常File XXX contains a path separato

 java.lang.IllegalArgumentException: File /storage/emulated/0/xxx/Image/MDA4Ni0xMzgyMzE2ODY3MQ.png contains a path separator
        at android.app.ContextImpl.makeFilename(ContextImpl.java:2882)
        at android.app.ContextImpl.openFileInput(ContextImpl.java:623)
        at android.content.ContextWrapper.openFileInput(ContextWrapper.java:202)
        at com.xxx.xxx.utils.ImageUtil.file2byte(ImageUtil.java:214)
        at com.xxx.xxx.presenter.LeftPagePst$10.onStateChanged(LeftPagePst.java:467)
        at 
        at android.os.Handler.handleCallback(Handler.java:891)
        at android.os.Handler.dispatchMessage(Handler.java:102)
        at android.os.Looper.loop(Looper.java:207)
        at android.app.ActivityThread.main(ActivityThread.java:7470)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:524)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:958)
2019-08-28 11:06:48.702 17113-17113/com.xxx.xxxI/Process: Sending signal. PID: 17113 SIG: 9

FileInputStream input = getContext().openFileInput(path);
替换成下面的方式即可
File file = new File(path);
FileInputStream input = new FileInputStream(file);

参考：https://www.cnblogs.com/sipher/articles/2832909.html