Install an app programmatically from inner memory

I have created a small app, able to download an apk file and to in开发者_开发问答stall it. This app is working correctly when I install the .apk file on the sdcard, but when I try to download the file in the inner memory, I get an error : "Erreur d'analyse".

Is there a way to install an apk file that would have been installed in the inner memory and not on the sdcard?

I can understand why it wouldn't be possible on a phone. But with the new tablets and their gigs of memory, it should be possible?

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No. There is no way to write it to internal memory. If there were, there would be a Manifest Permission for it (such as WRITE_EXTERNAL_STORAGE for writing to the SD card), but unfortunately there is no such permission.