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s1rius/ProgressBarAnimation

Created July 9, 2014 10:38
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Revisions

  1. s1rius created this gist Jul 9, 2014.
    42 changes: 42 additions & 0 deletions ProgressBarAnimation
    View file
    Original file line number Diff line number Diff line change
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    import android.view.animation.Animation;
    import android.view.animation.Transformation;
    import android.widget.ProgressBar;

    public class ProgressBarAnimation extends Animation {
    private ProgressBar mProgressBar;
    private int mTo;
    private int mFrom;
    private long mStepDuration;

    /**
    * @param fullDuration - time required to fill progress from 0% to 100%
    */
    public ProgressBarAnimation(ProgressBar progressBar, long fullDuration) {
    super();
    mProgressBar = progressBar;
    mStepDuration = fullDuration / progressBar.getMax();
    }


    public void setProgress(int progress) {
    if (progress < 0) {
    progress = 0;
    }

    if (progress > mProgressBar.getMax()) {
    progress = mProgressBar.getMax();
    }

    mTo = progress;

    mFrom = mProgressBar.getProgress();
    setDuration(Math.abs(mTo - mFrom) * mStepDuration);
    mProgressBar.startAnimation(this);
    }

    @Override
    protected void applyTransformation(float interpolatedTime, Transformation t) {
    float value = mFrom + (mTo - mFrom) * interpolatedTime;
    mProgressBar.setProgress((int) value);
    }
    }