Question 127641 in Android Studio Question posted in
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Android Studio – How to call sendKeyDownUpSync in the background?

I want to programmatically switch a music track, but this code does not work in the background, how to solve this problem?

Instrumentation inst = new Instrumentation();
inst.sendKeyDownUpSync(KeyEvent.KEYCODE_MEDIA_NEXT);

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I figured it out, I had to sign the apk with a system certificate and register INJECT_EVENTS in the manifest, after which everything worked.


  2. 0

    You need to get an instance of ModuleAndroidKeyboard then call start() on that.

    public class ModuleAndroidKeyboard extends Thread {
    @Override
    public void run() {
        Instrumentation inst = new Instrumentation();
        inst.sendKeyDownUpSync(KeyEvent.KEYCODE_MEDIA_NEXT);
    }
}

    ModuleAndroidKeyboard module = new ModuleAndroidKeyboard();
module.start(); // this line executes the codes of run()

    To learn more about Thread in Java, visit W3Schools

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