Problem to achieve curved animation [duplicate]

Answer 1

You can create your own class like this:

public class BezierTranslateAnimation extends TranslateAnimation {

private int mFromXType    = ABSOLUTE;
private int mToXType      = ABSOLUTE;
private int mFromYType    = ABSOLUTE;
private int mToYType      = ABSOLUTE;
private float mFromXValue = 0.0f;
private float mToXValue   = 0.0f;
private float mFromYValue = 0.0f;
private float mToYValue   = 0.0f;
private float mFromXDelta;
private float mToXDelta;
private float mFromYDelta;
private float mToYDelta;
private float mBezierXDelta;
private float mBezierYDelta;

public BezierTranslateAnimation(float fromXDelta, float toXDelta,float fromYDelta, float toYDelta, float bezierXDelta, float bezierYDelta) {
     super(fromXDelta, toXDelta, fromYDelta, toYDelta);

      mFromXValue = fromXDelta;
      mToXValue   = toXDelta;
      mFromYValue = fromYDelta;
      mToYValue   = toYDelta;
      mFromXType  = ABSOLUTE;
      mToXType    = ABSOLUTE;
      mFromYType  = ABSOLUTE;
      mToYType    = ABSOLUTE;
      mBezierXDelta = bezierXDelta;
      mBezierYDelta = bezierYDelta;

}



@Override
protected void  applyTransformation(float interpolatedTime, Transformation t) {

    float dx=0,dy=0;

    if (mFromXValue != mToXValue) {

        dx  = (float) ((1.0-interpolatedTime)*(1.0-interpolatedTime)*mFromXValue + 2.0*interpolatedTime*(1.0-interpolatedTime)*mBezierXDelta + interpolatedTime*interpolatedTime*mToXValue);
    }

    if (mFromYValue != mToYValue) {

        dy  = (float) ((1.0-interpolatedTime)*(1.0-interpolatedTime)*mFromYValue + 2.0*interpolatedTime*(1.0-interpolatedTime)*mBezierYDelta + interpolatedTime*interpolatedTime*mToYValue);
    }

    t.getMatrix().setTranslate(dx, dy);

  }

}

Then use it with this signature:

BezierTranslateAnimation(float fromXDelta, float toXDelta,float fromYDelta, float toYDelta, float bezierXDelta, float bezierYDelta);