HOWTO config double tap to launch camera

In order to have the feature double tap to launch "anything", you just need root and an sql editor

in your sql editor:
1. Find Settings Storage (it's a different name for every language)
2. Tap on system
3. Tap on search icon and write "double"
4. in the entry named "double_tab_launch" place "1" in "value"
5. if you dont have a entry named "double_tab_launch_component", made it. In value place this:

Code:

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com.sec.android.app.camera/com.sec.android.app.camera.Camera

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reboot and it's done. Double tap in home, launch camera.. If you want to launch other apk, it's easy. For example, to launch whatsapp, in "double_tab_launch_component", place:

Code:

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com.whatsapp/com.whatsapp.Main

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thanks to @Albe95 for this post: