Uma View pode receber os dois toques, mas duas views não recebem os toques separados.
Para resolver isto eu usei uma classe que achei na internet para dispachar os eventos para varias Views.
public class MultiTouchActivity extends Activity implements OnTouchListener {
private View parent;
private final ArrayList[] recentTouchedViewsIndex = new ArrayList[10];
private final ArrayList[] downTouchedViewsIndex = new ArrayList[10];
private final ArrayList<View> moveOutsideEnabledViews = new ArrayList<View>();
private int mTouchSlop = 24;
public void addMoveOutsideEnabledViews(final View view) {
moveOutsideEnabledViews.add(view);
}
private void dealEvent(final int actionPointerIndex,
final MotionEvent event, final View eventView,
final int actionResolved) {
int rawX, rawY;
final int location[] = { 0, 0 };
eventView.getLocationOnScreen(location);
// Log.v("tag", location + "");
rawX = (int) event.getX(actionPointerIndex) + location[0];
rawY = (int) event.getY(actionPointerIndex) + location[1];
final int actionPointerID = event.getPointerId(actionPointerIndex);
ArrayList<View> hoverViews = getTouchedViews(rawX, rawY);
if (actionResolved == MotionEvent.ACTION_DOWN) {
downTouchedViewsIndex[actionPointerID] = (ArrayList<View>) hoverViews
.clone();
}
// deletes all views which where not clicked on ActionDown
if (downTouchedViewsIndex[actionPointerID] != null) {
final ArrayList<View> tempViews = (ArrayList<View>) hoverViews
.clone();
tempViews.removeAll(downTouchedViewsIndex[actionPointerID]);
hoverViews.removeAll(tempViews);
}
if (recentTouchedViewsIndex[actionPointerID] != null) {
final ArrayList<View> recentTouchedViews = recentTouchedViewsIndex[actionPointerID];
final ArrayList<View> shouldTouchViews = (ArrayList<View>) hoverViews
.clone();
if (!shouldTouchViews.containsAll(recentTouchedViews)) {
shouldTouchViews.removeAll(recentTouchedViews);
shouldTouchViews.addAll(recentTouchedViews);
final ArrayList<View> outsideTouchedViews = (ArrayList<View>) shouldTouchViews
.clone();
outsideTouchedViews.removeAll(hoverViews);
}
recentTouchedViewsIndex[actionPointerID] = hoverViews;
hoverViews = shouldTouchViews;
} else {
recentTouchedViewsIndex[actionPointerID] = hoverViews;
}
if (actionResolved == MotionEvent.ACTION_UP) {
recentTouchedViewsIndex[actionPointerID] = null;
downTouchedViewsIndex[actionPointerID] = null;
}
dumpEvent(event);
for (final View view : hoverViews) {
int x, y;
view.getLocationOnScreen(location);
x = rawX - location[0];
y = rawY - location[1];
// View does not recognize that the Pointer is
// outside if the Pointer is not far away (>mTouchSlop)
if (recentTouchedViewsIndex[actionPointerID] != null) {
if (pointInView(x, y, mTouchSlop, view.getWidth(),
view.getHeight())) {
// Log.v("tag", "added because < mTouchSlop");
if (!recentTouchedViewsIndex[actionPointerID]
.contains(view)) {
recentTouchedViewsIndex[actionPointerID].add(view);
}
} else if (moveOutsideEnabledViews.contains(view)) {
Log.v("tag", "outside but gets event");
recentTouchedViewsIndex[actionPointerID].add(view);
}
}
final MotionEvent me = MotionEvent.obtain(event.getDownTime(),
event.getEventTime(), actionResolved, x, y,
event.getPressure(actionPointerIndex),
event.getPressure(actionPointerIndex),
event.getMetaState(), event.getXPrecision(),
event.getYPrecision(), event.getDeviceId(),
event.getEdgeFlags());
me.setLocation(x, y);
if (!me.equals(event)) {
// deals the Event
view.onTouchEvent(me);
}
// debug
if (actionResolved == MotionEvent.ACTION_MOVE) {
Log.v("tag",
"#" + actionPointerIndex + " Rawx:" + rawX + " rawy:"
+ rawY + " x:" + x + " y:" + y + " "
+ view.toString());
}
}
}
private void dumpEvent(final MotionEvent event) {
final String names[] = { "DOWN", "UP", "MOVE", "CANCEL", "OUTSIDE",
"POINTER_DOWN", "POINTER_UP", "7?", "8?", "9?" };
final StringBuilder sb = new StringBuilder();
final int action = event.getAction();
final int actionCode = action & MotionEvent.ACTION_MASK;
sb.append("event ACTION_").append(names[actionCode]);
if (actionCode == MotionEvent.ACTION_POINTER_DOWN
|| actionCode == MotionEvent.ACTION_POINTER_UP) {
sb.append("(pid ").append(
action >> MotionEvent.ACTION_POINTER_ID_SHIFT);
sb.append(")");
}
sb.append("[");
for (int i = 0; i < event.getPointerCount(); i++) {
sb.append("#").append(i);
sb.append("(pid ").append(event.getPointerId(i));
sb.append(")=").append((int) event.getX(i));
sb.append(",").append((int) event.getY(i));
if (i + 1 < event.getPointerCount()) {
sb.append(";");
}
}
sb.append("]");
Log.d("tag", sb.toString());
}
private ArrayList<View> getChildViews(final View view) {
final ArrayList<View> views = new ArrayList<View>();
if (view instanceof ViewGroup) {
final ViewGroup v = ((ViewGroup) view);
if (v.getChildCount() > 0) {
for (int i = 0; i < v.getChildCount(); i++) {
views.add(v.getChildAt(i));
}
}
}
return views;
}
private ArrayList<View> getTouchedViews(final int x, final int y) {
final ArrayList<View> touchedViews = new ArrayList<View>();
final ArrayList<View> possibleViews = new ArrayList<View>();
if (parent instanceof ViewGroup) {
possibleViews.add(parent);
for (int i = 0; i < possibleViews.size(); i++) {
final View view = possibleViews.get(i);
final int location[] = { 0, 0 };
view.getLocationOnScreen(location);
if (((view.getHeight() + location[1] >= y)
& (view.getWidth() + location[0] >= x)
& (view.getLeft() <= x) & (view.getTop() <= y))
|| view instanceof FrameLayout) {
touchedViews.add(view);
possibleViews.addAll(getChildViews(view));
}
}
}
return touchedViews;
}
@Override
public void onCreate(final Bundle instance) {
super.onCreate(instance);
requestWindowFeature(Window.FEATURE_NO_TITLE);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
getWindow().clearFlags(
WindowManager.LayoutParams.FLAG_FORCE_NOT_FULLSCREEN);
parent = findViewById(android.R.id.content).getRootView();
parent.setOnTouchListener(this);
mTouchSlop = ViewConfiguration.get(getApplicationContext())
.getScaledTouchSlop();
}
@Override
public boolean onTouch(final View v, final MotionEvent event) {
// index of the pointer which starts this Event
final int actionPointerIndex = event.getActionIndex();
// resolve the action as a basic type (up, down or move)
int actionResolved = event.getAction() & MotionEvent.ACTION_MASK;
if (actionResolved < 7 && actionResolved > 4) {
actionResolved = actionResolved - 5;
}
if (actionResolved == MotionEvent.ACTION_MOVE) {
for (int ptrIndex = 0; ptrIndex < event.getPointerCount(); ptrIndex++) {
// only one event for all move events.
dealEvent(ptrIndex, event, v, actionResolved);
Log.v("tag", "move" + ptrIndex);
}
} else {
dealEvent(actionPointerIndex, event, v, actionResolved);
}
return true;
}
private boolean pointInView(final float localX, final float localY,
final float slop, final float width, final float height) {
return localX >= -slop && localY >= -slop && localX < ((width) + slop)
&& localY < ((height) + slop);
}
}
