Example usage for android.animation ObjectAnimator setValues

Introduction

In this page you can find the example usage for android.animation ObjectAnimator setValues.

Prototype

public void setValues(PropertyValuesHolder... values) 

Source Link

Document

Sets the values, per property, being animated between.

Usage

From source file:Main.java

public static ObjectAnimator ofPropertyValuesHolder(Object target, PropertyValuesHolder... values) {
    ObjectAnimator anim = new ObjectAnimator();
    anim.setTarget(target);/*from   w  w w  .  j a va2 s . c o m*/
    anim.setValues(values);
    cancelOnDestroyActivity(anim);
    return anim;
}

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From source file:android.support.graphics.drawable.AnimatorInflaterCompat.java

private static void setupPathMotion(Path path, ObjectAnimator oa, float precision, String propertyXName,
        String propertyYName) {//from w  w  w.j a  va  2  s .c o  m
    // Measure the total length the whole path.
    final PathMeasure measureForTotalLength = new PathMeasure(path, false);
    float totalLength = 0;
    // The sum of the previous contour plus the current one. Using the sum here b/c we want to
    // directly substract from it later.
    ArrayList<Float> contourLengths = new ArrayList<>();
    contourLengths.add(0f);
    do {
        final float pathLength = measureForTotalLength.getLength();
        totalLength += pathLength;
        contourLengths.add(totalLength);

    } while (measureForTotalLength.nextContour());

    // Now determine how many sample points we need, and the step for next sample.
    final PathMeasure pathMeasure = new PathMeasure(path, false);

    final int numPoints = min(MAX_NUM_POINTS, (int) (totalLength / precision) + 1);

    float[] mX = new float[numPoints];
    float[] mY = new float[numPoints];
    final float[] position = new float[2];

    int contourIndex = 0;
    float step = totalLength / (numPoints - 1);
    float currentDistance = 0;

    // For each sample point, determine whether we need to move on to next contour.
    // After we find the right contour, then sample it using the current distance value minus
    // the previously sampled contours' total length.
    for (int i = 0; i < numPoints; ++i) {
        pathMeasure.getPosTan(currentDistance, position, null);
        pathMeasure.getPosTan(currentDistance, position, null);

        mX[i] = position[0];
        mY[i] = position[1];
        currentDistance += step;
        if ((contourIndex + 1) < contourLengths.size()
                && currentDistance > contourLengths.get(contourIndex + 1)) {
            currentDistance -= contourLengths.get(contourIndex + 1);
            contourIndex++;
            pathMeasure.nextContour();
        }
    }

    // Given the x and y value of the sample points, setup the ObjectAnimator properly.
    PropertyValuesHolder x = null;
    PropertyValuesHolder y = null;
    if (propertyXName != null) {
        x = PropertyValuesHolder.ofFloat(propertyXName, mX);
    }
    if (propertyYName != null) {
        y = PropertyValuesHolder.ofFloat(propertyYName, mY);
    }
    if (x == null) {
        oa.setValues(y);
    } else if (y == null) {
        oa.setValues(x);
    } else {
        oa.setValues(x, y);
    }
}

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