Android焦点变换相关代码~
if (direction != 0) {
View focused = mView != null ? mView.findFocus() : null;
if (focused != null) {
View v = focused.focusSearch(direction);
if (v != null && v != focused) {
// do the math the get the interesting rect
// of previous focused into the coord system of
// newly focused view
focused.getFocusedRect(mTempRect);
if (mView instanceof ViewGroup) {
((ViewGroup) mView).offsetDescendantRectToMyCoords(
focused, mTempRect);
((ViewGroup) mView).offsetRectIntoDescendantCoords(
v, mTempRect);
}
if (v.requestFocus(direction, mTempRect)) {
playSoundEffect(
SoundEffectConstants.getContantForFocusDirection(direction));
finishKeyEvent(event, sendDone, true);
return;
}
}
// Give the focused view a last chance to handle the dpad key.
if (mView.dispatchUnhandledMove(focused, direction)) {
finishKeyEvent(event, sendDone, true);
return;
}
}
}