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You can use the start command from Activity Manager (am) a.k.a the adb shell am start -n command (via adb) specifying the app package name and the component name as defined in the manifest. You can add other parameters like ACTION (-a android. intent. action.
But, in order to execute several commands in one line, you may use adb shell "cmd1;cmd2;cmd3" . The && command mentioned by @Rachit is not quite right, because in the case adb shell "netcfg && ps && getprop" , command ps will be executed only when netcfg is executed without error raised.
Show activity on this post. Then "chmod +x adb-run.sh" to make it executable. Note: This requires that you have Android Asset Packaging Tool ( aapt ) in your path. You can find it under the new build tools folder in the SDK.
Launch adb shell and enter the command as follows
am start -n yourpackagename/.activityname
eg：
MyPackageName is com.example.demo
MyActivityName is com.example.test.MainActivity
adb shell am start -n com.example.demo/com.example.test.MainActivity
I run it like AndroidStudio does:
am start -n "com.example.app.dev/com.example.app.phonebook.PhoneBookActivity" -a android.intent.action.MAIN -c android.intent.category.LAUNCHER
If you have product flavour like dev, it should occur only in application package name but shouldn't occur in activity package name.
For emulator, it works without android:exported="true" flag on activity in AndroidManifest.xml but I found it useful to add it for unrooted physical device to make it work.
You can also find the name of the current on screen activity using
adb shell dumpsys window windows | grep 'mCurrentFocus'
adb shell am broadcast -a android.intent.action.xxx
Mention xxx as the action that you mentioned in the manifest file.
For example this will start XBMC:
adb shell am start -a android.intent.action.MAIN -n org.xbmc.xbmc/android.app.NativeActivity
(More general answers are already posted, but I missed a nice example here.)
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