android - 在运行时更改手势颜色

Question

我想在运行时更改手势颜色。
我可以使用布局 XML 更改手势颜色，但不能使用代码。
我努力了

private class GesturesProcessor implements GestureOverlayView.OnGestureListener {
    public GesturesProcessor() {
        GestureOverlayView overlay = (GestureOverlayView) findViewById(R.id.gestures_overlay);
        Log.i("on", "constructor");
        overlay.setGestureColor(R.color.lightblue);
    }

    public void onGestureStarted(GestureOverlayView overlay, MotionEvent event) {
        mDoneButton.setEnabled(false);
        mGesture = null;
        Log.i("on", "ongesture started");
    }

    public void onGesture(GestureOverlayView overlay, MotionEvent event) {
    }

    public void onGestureEnded(GestureOverlayView overlay, MotionEvent event) {
        mGesture = overlay.getGesture();
        Log.i("on", "gesture ended");
        /*if (mGesture.getLength() < LENGTH_THRESHOLD) {
           overlay.clear(false);
        }*/
        mDoneButton.setEnabled(true);
    }

    public void onGestureCancelled(GestureOverlayView overlay, MotionEvent event) {
        Log.i("on", "gesture ended");
    }
}

但它不工作

Answer 1

要更改手势颜色，请使用

gestureOverlayView.setGestureColor(Color.BLACK);

其中gestureOverlayView是GestureOverLayView的对象。

如果您有颜色的十六进制字符串值，请从资源中使用

gestureOverlayView.setGestureColor(Color.parseColor(R.string.Color));

Answer 2

您需要做的只是覆盖onGesturePerformed()方法，然后尝试更改颜色，如下所示。

       @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    gestureView = (GestureOverlayView)findViewById(R.id.gvDrawingPadOrange);
    gestureView.setFadeOffset(3600000);
    gestureView.setEnabled(true);
    gestureView.setDrawingCacheEnabled(true);

    gestureView.addOnGesturePerformedListener(new GestureOverlayView.OnGesturePerformedListener() {

        public void onGesturePerformed(GestureOverlayView overlay, Gesture gesture) {


        }
    });
    gestureView.setUncertainGestureColor(getResources().getColor(R.color.colorPrimary));
    gestureView.setGestureColor(Color.BLUE);
}