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Ripples using Probe and RevealColorViews
package com.cafesalam.experiments.app.ui;
import org.lucasr.probe.Interceptor;
import android.content.Context;
import android.graphics.Color;
import android.graphics.Point;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewParent;
import android.widget.FrameLayout;
import java.util.WeakHashMap;
import at.markushi.ui.RevealColorView;
/* this class is a Probe Interceptor that gives views a ripple effect
* using https://github.com/markushi/android-ui.
*
* based on markus's sample gist:
* https://gist.github.com/markushi/68ce8df77bed164b6275
*/
public class RevealInterceptor extends Interceptor {
private static final int BACKGROUND = Color.parseColor("#212121");
private Context mContext;
private WeakHashMap<View, FrameLayout> mMapping;
public RevealInterceptor(Context context) {
mContext = context;
mMapping = new WeakHashMap<>();
}
@Override
public void onLayout(View view, boolean changed,
int left, int top, int right, int bottom) {
if (!(view instanceof ViewGroup)) {
FrameLayout container = mMapping.get(view);
if (container == null) {
container = new FrameLayout(mContext);
mMapping.put(view, container);
RevealColorView revealColorView = new RevealColorView(mContext);
revealColorView.setBackgroundColor(BACKGROUND);
final ViewParent parent = view.getParent();
if (parent instanceof ViewGroup) {
final ViewGroup pvg = (ViewGroup) parent;
final int index = pvg.indexOfChild(view);
pvg.removeViewInLayout(view);
// you'd perhaps set this in xml as per android-ui's gist
view.setTag(new Holder("#8bc34a"));
container.addView(revealColorView);
container.addView(view);
// ideally should use addViewInLayout, but can't because
// it is protected
pvg.addView(container, index, view.getLayoutParams());
pvg.invalidate();
view.setOnClickListener(mOnClickListener);
}
}
}
super.onLayout(view, changed, left, top, right, bottom);
}
private static class Holder {
public int color;
public boolean isShowing;
public Holder(String colorStr) {
this.color = Color.parseColor(colorStr);
}
}
private View.OnClickListener mOnClickListener = new View.OnClickListener() {
@Override
public void onClick(View v) {
final RevealColorView revealColorView =
(RevealColorView) (((ViewGroup) v.getParent()).getChildAt(0));
final Point p = getLocationInView(revealColorView, v);
final Holder holder = (Holder) v.getTag();
final int color = holder.color;
if (holder.isShowing) {
revealColorView.hide(p.x, p.y, BACKGROUND, 0, 300, null);
holder.isShowing = false;
} else {
revealColorView.reveal(p.x, p.y, color, v.getHeight() / 2, 340, null);
holder.isShowing = true;
}
}
};
private Point getLocationInView(View src, View target) {
final int[] l0 = new int[2];
src.getLocationOnScreen(l0);
final int[] l1 = new int[2];
target.getLocationOnScreen(l1);
l1[0] = l1[0] - l0[0] + target.getWidth() / 2;
l1[1] = l1[1] - l0[1] + target.getHeight() / 2;
return new Point(l1[0], l1[1]);
}
}
Owner
ahmedre commented Oct 14, 2014

updated per Lucas's comments - use removeViewInLayout instead of removeViewAt, and add a comment about addViewInLayout.

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