KeyButtonViewpublic class KeyButtonView extends android.widget.ImageView
| Fields Summary |
|---|
| private static final String | TAG | | private static final boolean | DEBUG | | public static final float | DEFAULT_QUIESCENT_ALPHA | | private long | mDownTime | | private int | mCode | | private int | mTouchSlop | | private float | mDrawingAlpha | | private float | mQuiescentAlpha | | private boolean | mSupportsLongpress | | private android.media.AudioManager | mAudioManager | | private android.animation.Animator | mAnimateToQuiescent | | private final Runnable | mCheckLongPress |
| Constructors Summary |
|---|
public KeyButtonView(android.content.Context context, android.util.AttributeSet attrs)
this(context, attrs, 0);
| public KeyButtonView(android.content.Context context, android.util.AttributeSet attrs, int defStyle)
super(context, attrs);
TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.KeyButtonView,
defStyle, 0);
mCode = a.getInteger(R.styleable.KeyButtonView_keyCode, 0);
mSupportsLongpress = a.getBoolean(R.styleable.KeyButtonView_keyRepeat, true);
setDrawingAlpha(mQuiescentAlpha);
a.recycle();
setClickable(true);
mTouchSlop = ViewConfiguration.get(context).getScaledTouchSlop();
mAudioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
setBackground(new KeyButtonRipple(context, this));
|
| Methods Summary |
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| private android.animation.ObjectAnimator | animateToQuiescent()
return ObjectAnimator.ofFloat(this, "drawingAlpha", mQuiescentAlpha);
| | public float | getDrawingAlpha()
return mDrawingAlpha;
| | public float | getQuiescentAlpha()
return mQuiescentAlpha;
| | public void | onInitializeAccessibilityNodeInfo(android.view.accessibility.AccessibilityNodeInfo info)
super.onInitializeAccessibilityNodeInfo(info);
if (mCode != 0) {
info.addAction(new AccessibilityNodeInfo.AccessibilityAction(ACTION_CLICK, null));
if (mSupportsLongpress) {
info.addAction(
new AccessibilityNodeInfo.AccessibilityAction(ACTION_LONG_CLICK, null));
}
}
| | public boolean | onTouchEvent(android.view.MotionEvent ev)
final int action = ev.getAction();
int x, y;
switch (action) {
case MotionEvent.ACTION_DOWN:
//Log.d("KeyButtonView", "press");
mDownTime = SystemClock.uptimeMillis();
setPressed(true);
if (mCode != 0) {
sendEvent(KeyEvent.ACTION_DOWN, 0, mDownTime);
} else {
// Provide the same haptic feedback that the system offers for virtual keys.
performHapticFeedback(HapticFeedbackConstants.VIRTUAL_KEY);
}
if (mSupportsLongpress) {
removeCallbacks(mCheckLongPress);
postDelayed(mCheckLongPress, ViewConfiguration.getLongPressTimeout());
}
break;
case MotionEvent.ACTION_MOVE:
x = (int)ev.getX();
y = (int)ev.getY();
setPressed(x >= -mTouchSlop
&& x < getWidth() + mTouchSlop
&& y >= -mTouchSlop
&& y < getHeight() + mTouchSlop);
break;
case MotionEvent.ACTION_CANCEL:
setPressed(false);
if (mCode != 0) {
sendEvent(KeyEvent.ACTION_UP, KeyEvent.FLAG_CANCELED);
}
if (mSupportsLongpress) {
removeCallbacks(mCheckLongPress);
}
break;
case MotionEvent.ACTION_UP:
final boolean doIt = isPressed();
setPressed(false);
if (mCode != 0) {
if (doIt) {
sendEvent(KeyEvent.ACTION_UP, 0);
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
playSoundEffect(SoundEffectConstants.CLICK);
} else {
sendEvent(KeyEvent.ACTION_UP, KeyEvent.FLAG_CANCELED);
}
} else {
// no key code, just a regular ImageView
if (doIt) {
performClick();
}
}
if (mSupportsLongpress) {
removeCallbacks(mCheckLongPress);
}
break;
}
return true;
| | protected void | onWindowVisibilityChanged(int visibility)
super.onWindowVisibilityChanged(visibility);
if (visibility != View.VISIBLE) {
jumpDrawablesToCurrentState();
}
| | public boolean | performAccessibilityAction(int action, android.os.Bundle arguments)
if (action == ACTION_CLICK && mCode != 0) {
sendEvent(KeyEvent.ACTION_DOWN, 0, SystemClock.uptimeMillis());
sendEvent(KeyEvent.ACTION_UP, 0);
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_CLICKED);
playSoundEffect(SoundEffectConstants.CLICK);
return true;
} else if (action == ACTION_LONG_CLICK && mCode != 0 && mSupportsLongpress) {
sendEvent(KeyEvent.ACTION_DOWN, KeyEvent.FLAG_LONG_PRESS);
sendEvent(KeyEvent.ACTION_UP, 0);
sendAccessibilityEvent(AccessibilityEvent.TYPE_VIEW_LONG_CLICKED);
return true;
}
return super.performAccessibilityAction(action, arguments);
| | public void | playSoundEffect(int soundConstant)
mAudioManager.playSoundEffect(soundConstant, ActivityManager.getCurrentUser());
| | public void | sendEvent(int action, int flags)
sendEvent(action, flags, SystemClock.uptimeMillis());
| | void | sendEvent(int action, int flags, long when)
final int repeatCount = (flags & KeyEvent.FLAG_LONG_PRESS) != 0 ? 1 : 0;
final KeyEvent ev = new KeyEvent(mDownTime, when, action, mCode, repeatCount,
0, KeyCharacterMap.VIRTUAL_KEYBOARD, 0,
flags | KeyEvent.FLAG_FROM_SYSTEM | KeyEvent.FLAG_VIRTUAL_HARD_KEY,
InputDevice.SOURCE_KEYBOARD);
InputManager.getInstance().injectInputEvent(ev,
InputManager.INJECT_INPUT_EVENT_MODE_ASYNC);
| | public void | setDrawingAlpha(float x)
setImageAlpha((int) (x * 255));
mDrawingAlpha = x;
| | public void | setQuiescentAlpha(float alpha, boolean animate)
mAnimateToQuiescent.cancel();
alpha = Math.min(Math.max(alpha, 0), 1);
if (alpha == mQuiescentAlpha && alpha == mDrawingAlpha) return;
mQuiescentAlpha = alpha;
if (DEBUG) Log.d(TAG, "New quiescent alpha = " + mQuiescentAlpha);
if (animate) {
mAnimateToQuiescent = animateToQuiescent();
mAnimateToQuiescent.start();
} else {
setDrawingAlpha(mQuiescentAlpha);
}
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