1. Error description
Today, when installing APK after compiling the application with Android Studio, an error was reported, as shown below:

The APK file build\outputs\apk\OYP_2.3.4_I2Base_6476_official_debug.apk does not exist on disk.
Error while Installing APK

1 2

as shown in the figure below
2. Solutions
1. Tried build-& GT; Clean Project recompiled, still invalid
2, try to restart Android Studio invalid
Then I went to open build\outputs\apk\ directory, and found that the apk file was compiled, but the file name was exactly:
oyp_2.3.4 _i2base_6478_official_debug.apk
looks like the following:

Therefore, the APK file compiled by Android Studio is
OYP_2. 3.4 _I2Base_6478_official_debug. Apk
And it wants to install the APK filename exactly
Oyp_2.3.4 _i2base_6476_official_debug.apk
will therefore report an error. Google checked the error, on the http://stackoverflow.com website has an article about the solution of the error, the link as shown below:
http://stackoverflow.com/questions/34039834/the-apk-file-does-not-exist-on-disk
Solution:
as shown in the following figure:
Step 1: Click the Gradle button in the Android Studio sidebar, as shown below

Step 2: Refresh the Gradle configuration

Step 3: Recompile can, will not report an error.