version:1.5

fix:迁移到奥乐云平台
add:

src/com/aoleyun/os/StylusEventHelper.java

@@ -0,0 +1,109 @@
+package com.aoleyun.os;
+
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.ViewConfiguration;
+
+/**
+ * Helper for identifying when a stylus touches a view while the primary stylus button is pressed.
+ * This can occur in {@value MotionEvent#ACTION_DOWN} or {@value MotionEvent#ACTION_MOVE}.
+ */
+public class StylusEventHelper {
+
+    /**
+     * Implement this interface to receive callbacks for a stylus button press and release.
+     */
+    public interface StylusButtonListener {
+        /**
+         * Called when the stylus button is pressed.
+         *
+         * @param event The MotionEvent that the button press occurred for.
+         * @return Whether the event was handled.
+         */
+        public boolean onPressed(MotionEvent event);
+
+        /**
+         * Called when the stylus button is released after a button press. This is also called if
+         * the event is canceled or the stylus is lifted off the screen.
+         *
+         * @param event The MotionEvent the button release occurred for.
+         * @return Whether the event was handled.
+         */
+        public boolean onReleased(MotionEvent event);
+    }
+
+    private boolean mIsButtonPressed;
+    private View mView;
+    private StylusButtonListener mListener;
+    private final float mSlop;
+
+    /**
+     * Constructs a helper for listening to stylus button presses and releases. Ensure that {
+     * {@link #onMotionEvent(MotionEvent)} and {@link #onGenericMotionEvent(MotionEvent)} are called on
+     * the helper to correctly identify stylus events.
+     *
+     * @param listener The listener to call for stylus events.
+     * @param view Optional view associated with the touch events.
+     */
+    public StylusEventHelper(StylusButtonListener listener, View view) {
+        mListener = listener;
+        mView = view;
+        if (mView != null) {
+            mSlop = ViewConfiguration.get(mView.getContext()).getScaledTouchSlop();
+        } else {
+            mSlop = ViewConfiguration.getTouchSlop();
+        }
+    }
+
+    public boolean onMotionEvent(MotionEvent event) {
+        final boolean stylusButtonPressed = isStylusButtonPressed(event);
+        switch (event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                mIsButtonPressed = stylusButtonPressed;
+                if (mIsButtonPressed) {
+                    return mListener.onPressed(event);
+                }
+                break;
+            case MotionEvent.ACTION_MOVE:
+                if (!Utilities.pointInView(mView, event.getX(), event.getY(), mSlop)) {
+                    return false;
+                }
+                if (!mIsButtonPressed && stylusButtonPressed) {
+                    mIsButtonPressed = true;
+                    return mListener.onPressed(event);
+                } else if (mIsButtonPressed && !stylusButtonPressed) {
+                    mIsButtonPressed = false;
+                    return mListener.onReleased(event);
+                }
+                break;
+            case MotionEvent.ACTION_UP:
+            case MotionEvent.ACTION_CANCEL:
+                if (mIsButtonPressed) {
+                    mIsButtonPressed = false;
+                    return mListener.onReleased(event);
+                }
+                break;
+        }
+        return false;
+    }
+
+    /**
+     * Whether a stylus button press is occurring.
+     */
+    public boolean inStylusButtonPressed() {
+        return mIsButtonPressed;
+    }
+
+    /**
+     * Identifies if the provided {@link MotionEvent} is a stylus with the primary stylus button
+     * pressed.
+     *
+     * @param event The event to check.
+     * @return Whether a stylus button press occurred.
+     */
+    private static boolean isStylusButtonPressed(MotionEvent event) {
+        return event.getToolType(0) == MotionEvent.TOOL_TYPE_STYLUS
+                && ((event.getButtonState() & MotionEvent.BUTTON_SECONDARY)
+                        == MotionEvent.BUTTON_SECONDARY);
+    }
+}