我最近一直在尝试为我的应用程序使用多点触控，但找不到任何解决我的问题的帮助，我发布了我遇到问题的代码。我正在使用 API 级别为 7 的旧 adk，多点触控可用于运行 2.1 的 android 吗？
谢谢
@Override
public boolean onTouchEvent(MotionEvent event) {
super.onTouchEvent(event);
int action = event.getAction() & MotionEvent.ACTION_MASK;
switch (action) {
case MotionEvent.ACTION_DOWN: {
float tx = event.getX();
float ty = event.getY();
if (tx > joystick.getWidth() - joystick.getWidth() && tx < (joystick.getWidth() / 3) && ty > getHeight() - joystick.getHeight()) {
left();
invalidate();
}
if (tx > (joystick.getWidth()/3)*2 && tx < (joystick.getWidth()) && ty > getHeight() - joystick.getHeight()) {
right();
invalidate();
}
if (tx > getWidth() - button.getWidth() - (button.getWidth() / 4)
&& ty > getHeight() - button.getHeight()
- (button.getHeight() / 4)) {
jump();
invalidate();
}else{jump_true = 0 ;
jump_is = true;}
break;
}
case MotionEvent.ACTION_MOVE: {
float txm = event.getX();
float tym = event.getY();
if (txm > joystick.getWidth() - joystick.getWidth() && txm < (joystick.getWidth() / 3) && tym > getHeight() - joystick.getHeight()) {
left();
right = false;
invalidate();
}
if (txm > getWidth() - button.getWidth() - (button.getWidth() / 4)
&& tym > getHeight() - button.getHeight()
- (button.getHeight() / 4)) {
//jump();
//invalidate();
}else{
//jump_true = 0 ;
//jump_is = true;
}
if (txm > (joystick.getWidth()/3)*2 && txm < (joystick.getWidth()) && tym > getHeight() - joystick.getHeight()) {
right();
left = false;
invalidate();
}
if (txm > getWidth() - button.getWidth() - (button.getWidth() / 4)
&& tym > getHeight() - button.getHeight()
- (button.getHeight() / 4)) {
jump();
invalidate();
}else{jump_true = 0 ;
jump_is = true;}
break;
}
case MotionEvent.ACTION_POINTER_DOWN: {
float txp = event.getX();
float typ = event.getY();
if (txp > getWidth() - button.getWidth() - (button.getWidth() / 4)
&& typ > getHeight() - button.getHeight()
- (button.getHeight() / 4)) {
jump();
invalidate();
}else{jump_true = 0 ;
jump_is = true;}
if (txp > joystick.getWidth() - joystick.getWidth() && txp < (joystick.getWidth() / 3) && typ > getHeight() - joystick.getHeight()) {
left();
right = false;
invalidate();
}
if (txp > getWidth() - button.getWidth() - (button.getWidth() / 4)
&& typ > getHeight() - button.getHeight()
- (button.getHeight() / 4)) {
//jump();
//invalidate();
}else{
//jump_true = 0 ;
//jump_is = true;
}
if (txp > (joystick.getWidth()/3)*2 && txp < (joystick.getWidth()) && typ > getHeight() - joystick.getHeight()) {
right();
left = false;
invalidate();
}
break;
}
case MotionEvent.ACTION_POINTER_UP: {
touch_up();
invalidate();
break;
}
case MotionEvent.ACTION_UP: {
touch_up();
invalidate();
break;
}
}
return true;
}
private void touch_up() {
left = false;
right = false;
jump_true = 0 ;
jump_is = true;
}
private void left() {
left = true;
}
private void right(){
right = true;
}
private void jump() {
jump_true=1;
jump_done = false;
}