Android simulate key press

You can use instrumentation, ie following code called from onCreate of your activity will cause menu to be opened and closed multiple times:

    new Thread(new Runnable() {                 @Override        public void run() {            try {            Instrumentation inst = new Instrumentation();            for ( int i = 0; i < 10; ++i ) {                inst.sendKeyDownUpSync(KeyEvent.KEYCODE_MENU);                Thread.sleep(2000);                inst.sendKeyDownUpSync(KeyEvent.KEYCODE_BACK);                Thread.sleep(2000);            }            }            catch(InterruptedException e){            }        }       }).start();

...but I am not sure if this is what you are after

If you have a view that want to consume the event you can use BaseInputConnection class and its sendKeyEvent method.

To use it you will need to specify a target view (e.g an EditText) that will receive the KeyEvent. For example:

EditText editText;BaseInputConnection inputConnection = new BaseInputConnection(editText, true);inputConnection.sendKeyEvent(new KeyEvent(KeyEvent.ACTION_DOWN, KeyEvent.KEYCODE_POUND));

The result of this is like user would actually pressed # key (while having the edit text focused).

Using instrumentation in my opinion doesn't work as intended, when editText is focused it sometimes causes soft keyboard to pop.

In my project i have a numeric keyboard fragment which should act like a normal keyboard, that's my way of achieving desired solution:

I tested this solution on 3 devices with android 7+:

Keyboard fragment onClick():

@Overridepublic void onClick(View v) {    switch(v.getId()) {        case R.id.button0:            simulateKeyPress(KeyEvent.KEYCODE_0);            break;        case R.id.button1:            simulateKeyPress(KeyEvent.KEYCODE_1);            break;        case R.id.button2:            simulateKeyPress(KeyEvent.KEYCODE_2);            break;        case R.id.button3:            simulateKeyPress(KeyEvent.KEYCODE_3);            break;        case R.id.button4:            simulateKeyPress(KeyEvent.KEYCODE_4);            break;        case R.id.button5:            simulateKeyPress(KeyEvent.KEYCODE_5);            break;        case R.id.button6:            simulateKeyPress(KeyEvent.KEYCODE_6);            break;        case R.id.button7:            simulateKeyPress(KeyEvent.KEYCODE_7);            break;        case R.id.button8:            simulateKeyPress(KeyEvent.KEYCODE_8);            break;        case R.id.button9:            simulateKeyPress(KeyEvent.KEYCODE_9);            break;    }}public void simulateKeyPress(int key){    Activity a = (Activity) getContext();    a.getWindow().getDecorView().getRootView();    BaseInputConnection inputConnection = new BaseInputConnection(a.getWindow().getDecorView().getRootView(),            true);    KeyEvent downEvent = new KeyEvent(KeyEvent.ACTION_DOWN, key);    KeyEvent upEvent = new KeyEvent(KeyEvent.ACTION_UP, key);    inputConnection.sendKeyEvent(downEvent);    inputConnection.sendKeyEvent(upEvent);}

This way i send the event to the root view of an activity and there it goes to the desired focused editText.

It's a bit rough solution but works fine.