android:paddingLeft="24dp"
android:paddingRight="24dp"
android:background="?android:attr/selectableItemBackground"
+ android:contentDescription="@string/keyboardview_keycode_delete"
/>
</LinearLayout>
<View
android:layout_height="match_parent"
android:layout_weight="1"
android:src="@drawable/sym_keyboard_return_holo"
+ android:contentDescription="@string/keyboardview_keycode_enter"
/>
</LinearLayout>
import android.text.style.TextAppearanceSpan;
import android.util.AttributeSet;
import android.view.HapticFeedbackConstants;
+import android.view.MotionEvent;
import android.view.View;
+import android.view.accessibility.AccessibilityManager;
import android.widget.Button;
import android.widget.TextView;
setTextViewResId(a.getResourceId(R.styleable.NumPadKey_textView, 0));
setOnClickListener(mListener);
+ setOnHoverListener(new LiftToActivateListener(context));
mEnableHaptics = new LockPatternUtils(context).isTactileFeedbackEnabled();
| HapticFeedbackConstants.FLAG_IGNORE_GLOBAL_SETTING);
}
}
+
+ /**
+ * Hover listener that implements lift-to-activate interaction for
+ * accessibility. May be added to multiple views.
+ */
+ static class LiftToActivateListener implements View.OnHoverListener {
+ /** Manager used to query accessibility enabled state. */
+ private final AccessibilityManager mAccessibilityManager;
+
+ public LiftToActivateListener(Context context) {
+ mAccessibilityManager = (AccessibilityManager) context.getSystemService(
+ Context.ACCESSIBILITY_SERVICE);
+ }
+
+ @Override
+ public boolean onHover(View v, MotionEvent event) {
+ // When touch exploration is turned on, lifting a finger while
+ // inside the view bounds should perform a click action.
+ if (mAccessibilityManager.isEnabled()
+ && mAccessibilityManager.isTouchExplorationEnabled()) {
+ switch (event.getActionMasked()) {
+ case MotionEvent.ACTION_HOVER_ENTER:
+ // Lift-to-type temporarily disables double-tap
+ // activation.
+ v.setClickable(false);
+ break;
+ case MotionEvent.ACTION_HOVER_EXIT:
+ final int x = (int) event.getX();
+ final int y = (int) event.getY();
+ if ((x > v.getPaddingLeft()) && (y > v.getPaddingTop())
+ && (x < v.getWidth() - v.getPaddingRight())
+ && (y < v.getHeight() - v.getPaddingBottom())) {
+ v.performClick();
+ }
+ v.setClickable(true);
+ break;
+ }
+ }
+ return false;
+ }
+ }
}