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Activity Manager

Apps in android cannot take command line arguments like linux or windows. Instead they expose activities for thier package name. inter-process communication is performed using the Activity Manager with -d or -e args on different apps. IMPORTANT: Launch Targets of AM Commands MUST be given full file access. To do so go to App Info screen Permissions. Allowed Files and Media. Allow Management of all Files. If you do not do this you will lose your mind. The most BIZARRE thing about this is from the app itself the app can access all Files NO Problem. So these entitlements MAKE NO SENSE. They only involve inter process communication using AM commands. Regardless make sure targets have full file access PERIOD.

Internal Links

1. adb

External Links

1. gregs qna 2
2. Daijishou Activity JSON's
3. Pegasus Activity Generator

Retroarch

am start --user 0 -n com.retroarch.aarch64/com.retroarch.browser.retroactivity.RetroActivityFuture -e ROM /path/to/some/rom -e LIBRETRO /data/user/0/com.retroarch.aarch64/cores/genesis_plus_gx_libretro_android.so -e CONFIGFILE /storage/emulated/0/Android/data/com.retroarch.aarch64/files/retroarch.cfg -e IME com.android.inputmethod.latin/.LatinIME -e DATADIR /data/data/com.retroarch.aarch64 -e APK /data/app/com.retroarch.aarch64-1/base.apk -e SDCARD /storage/emulated/0 -e EXTERNAL /storage/emulated/0/Android/data/com.retroarch.aarch64/files --activity-clear-top

Dolphin

dolphin-master-5.0-17269.apk (Newer than Play Store)
launch: am start -n org.dolphinemu.dolphinemu/.ui.main.MainActivity -a android.intent.action.VIEW -d "{file.uri}"

Redream

Redream
launch: am start -n io.recompiled.redream/.MainActivity -a android.intent.action.VIEW -d "{file.path}"