同时单击多个按钮时想要执行任务（Android Studio：java）

Question

I am creating a music app(flute) which play sounds when buttons are clicked. But i want to make a specific sound when multiple buttons are pressed simultaneously (example: playing c note when two buttons are pressed simultaneously).

There are seven buttons which makes seven different notes or sounds(c, d, e, f, g, a, b)

app should work as:

->play note c when button 2 and 3 are pressed simultaneously.

->play note d when button 2 is pressed.

->play note e when button 1 is pressed.

->play note f when button 3, 4, 5, 6 and 7 are pressed simultaneously.

->play note g when button 2, 3,4,5 and 6 are pressed simultaneously.

->play note a when button 2, 3, 4 and 5 are pressed simultaneously.

->play note b when button 2, 3 and 4 are pressed simultaneously.

if anyone can help i would appreciate it.

Answer 1

button1down : a=1 play();
button1up : a=0 play();

button2down : b=1; play();
button2up : b=0; play();

.......
play(){
if(a&&b){
play_tone_ab();
}else
if(a){
play_tone_a();
}
}

the pseudocode will look like this. But you may face some other problems while playing music. Playing many sound files may lead to some other problems. Sometimes this is a hardware problem. So, you may need to make that part stable by testing the algorithm if right functions are called. Use system.log first to be sure. Still you may need a nice sound mixing library, which can remix the input sounds before output.