Android Open Source - AndroidUIExample Reveal Color View

• Back to UI/example  ↑

From Project

Back to project page AndroidUIExample.

License

The source code is released under:

Apache License

Java Source Code

package com.example.androidui;
/* w ww .j  a  v a 2 s. c  o  m*/
import util.BakedBezierInterpolator;
import util.UiHelper;


import android.animation.Animator;
import android.annotation.SuppressLint;
import android.annotation.TargetApi;
import android.content.Context;
import android.graphics.Color;
import android.graphics.drawable.ShapeDrawable;
import android.graphics.drawable.shapes.OvalShape;
import android.os.Build;
import android.util.AttributeSet;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewPropertyAnimator;


public class RevealColorView extends ViewGroup {

  public static final int ANIMATION_REVEAL = 0;
  public static final int ANIMATION_HIDE = 2;

  private static final float SCALE = 8f;

  private View inkView;
  private int inkColor;
  private ShapeDrawable circle;
  private ViewPropertyAnimator animator;

  public RevealColorView(Context context) {
    this(context, null);
  }

  public RevealColorView(Context context, AttributeSet attrs) {
    this(context, attrs, 0);
  }

  public RevealColorView(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);

    if (isInEditMode()) {
      return;
    }

    inkView = new View(context);
    addView(inkView);

    circle = new ShapeDrawable(new OvalShape());

    UiHelper.setBackground(inkView, circle);
    inkView.setVisibility(View.INVISIBLE);
  }

  @Override
  protected void onLayout(boolean changed, int left, int top, int right, int bottom) {
    inkView.layout(left, top, left + inkView.getMeasuredWidth(), top + inkView.getMeasuredHeight());
  }

  @Override
  protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    final int width = MeasureSpec.getSize(widthMeasureSpec);
    final int height = MeasureSpec.getSize(heightMeasureSpec);
    setMeasuredDimension(width, height);

    final float circleSize = (float) Math.sqrt(width * width + height * height) * 2f;
    final int size = (int) (circleSize / SCALE);
    final int sizeSpec = MeasureSpec.makeMeasureSpec(size, MeasureSpec.EXACTLY);
    inkView.measure(sizeSpec, sizeSpec);
  }

  public void reveal(final int x, final int y, final int color, Animator.AnimatorListener listener) {
    final int duration = getResources().getInteger(R.integer.rcv_animationDurationReveal);
    reveal(x, y, color, 0, duration, listener);
  }

  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH) @SuppressLint("NewApi") public void reveal(final int x, final int y, final int color, final int startRadius, long duration, final Animator.AnimatorListener listener) {
    if (color == inkColor) {
      return;
    }
    inkColor = color;

    if (animator != null) {
      animator.cancel();
    }

    circle.getPaint().setColor(color);
    inkView.setVisibility(View.VISIBLE);

    final float startScale = startRadius * 2f / inkView.getHeight();
    final float finalScale = calculateScale(x, y) * SCALE;

    prepareView(inkView, x, y, startScale);
    animator = inkView.animate().scaleX(finalScale).scaleY(finalScale).setDuration(duration).setListener(new Animator.AnimatorListener() {
      @Override
      public void onAnimationStart(Animator animator) {
        if (listener != null) {
          listener.onAnimationStart(animator);
        }
      }

      @TargetApi(Build.VERSION_CODES.HONEYCOMB) @Override
      public void onAnimationEnd(Animator animation) {
        setBackgroundColor(color);
        inkView.setVisibility(View.INVISIBLE);
        if (listener != null) {
          listener.onAnimationEnd(animation);
        }
      }

      @TargetApi(Build.VERSION_CODES.HONEYCOMB) @Override
      public void onAnimationCancel(Animator animator) {
        if (listener != null) {
          listener.onAnimationCancel(animator);
        }
      }

      @Override
      public void onAnimationRepeat(Animator animator) {
        if (listener != null) {
          listener.onAnimationRepeat(animator);
        }
      }
    });
    prepareAnimator(animator, ANIMATION_REVEAL);
    animator.start();
  }

  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH) public void hide(final int x, final int y, final int color, final Animator.AnimatorListener listener) {
    final int duration = getResources().getInteger(R.integer.rcv_animationDurationHide);
    hide(x, y, color, 0, duration, listener);
  }

  @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH) public void hide(final int x, final int y, final int color, final int endRadius, final long duration, final Animator.AnimatorListener listener) {
    inkColor = Color.TRANSPARENT;

    if (animator != null) {
      animator.cancel();
    }

    inkView.setVisibility(View.VISIBLE);
    setBackgroundColor(color);

    final float startScale = calculateScale(x, y) * SCALE;
    final float finalScale = endRadius * SCALE / inkView.getWidth();

    prepareView(inkView, x, y, startScale);

    animator = inkView.animate().scaleX(finalScale).scaleY(finalScale).setDuration(duration).setListener(new Animator.AnimatorListener() {
      @TargetApi(Build.VERSION_CODES.HONEYCOMB) @Override
      public void onAnimationStart(Animator animator) {
        if (listener != null) {
          listener.onAnimationStart(animator);
        }
      }

      @TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH) @Override
      public void onAnimationEnd(Animator animation) {
        inkView.setVisibility(View.INVISIBLE);
        if (listener != null) {
          listener.onAnimationEnd(animation);
        }
      }

      @TargetApi(Build.VERSION_CODES.HONEYCOMB_MR1) @Override
      public void onAnimationCancel(Animator animator) {
        if (listener != null) {
          listener.onAnimationCancel(animator);
        }
      }

      @Override
      public void onAnimationRepeat(Animator animator) {
        if (listener != null) {
          listener.onAnimationRepeat(animator);
        }
      }
    });
    prepareAnimator(animator, ANIMATION_HIDE);
    animator.start();
  }

  @TargetApi(Build.VERSION_CODES.JELLY_BEAN) public ViewPropertyAnimator prepareAnimator(ViewPropertyAnimator animator, int type) {
    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
      animator.withLayer();
    }
    animator.setInterpolator(BakedBezierInterpolator.getInstance());
    return animator;
  }

  @TargetApi(Build.VERSION_CODES.HONEYCOMB) private void prepareView(View view, int x, int y, float scale) {
    final int centerX = (view.getWidth() / 2);
    final int centerY = (view.getHeight() / 2);
    view.setTranslationX(x - centerX);
    view.setTranslationY(y - centerY);
    view.setPivotX(centerX);
    view.setPivotY(centerY);
    view.setScaleX(scale);
    view.setScaleY(scale);
  }

  /**
   * calculates the required scale of the ink-view to fill the whole view
   *
   * @param x circle center x
   * @param y circle center y
   * @return
   */
  private float calculateScale(int x, int y) {
    final float centerX = getWidth() / 2f;
    final float centerY = getHeight() / 2f;
    final float maxDistance = (float) Math.sqrt(centerX * centerX + centerY * centerY);

    final float deltaX = centerX - x;
    final float deltaY = centerY - y;
    final float distance = (float) Math.sqrt(deltaX * deltaX + deltaY * deltaY);
    final float scale = 0.5f + (distance / maxDistance) * 0.5f;
    return scale;
  }
}

Java Source Code List

• Back to UI/example  ↑