How to recover bitcoins from personal wallet app in android which is uninstalled?
Without a backup, there is no way to recover the coins.

If this happened very recently, you might be able to enlist a data recovery service to pull the keys off the device. This is likely to cost more than $100 though.

Wallet generation is based on random data, and if you do not backup individual keys, or the mnemonic for HD wallets, you cannot recreate the keys.