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Extract ExpandableView code into interface

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topjohnwu
2017-08-29 04:10:04 +08:00
parent 439c7118f1
commit cc81cd446b
8 changed files with 117 additions and 165 deletions
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84
app/src/main/java/com/topjohnwu/magisk/components/ExpandableView.java Normal file
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package com.topjohnwu.magisk.components;
import android.animation.ValueAnimator;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
public interface ExpandableView {
class Container {
public ViewGroup expandLayout;
ValueAnimator expandAnimator, collapseAnimator;
boolean mExpanded = false;
int expandHeight = 0;
}
// Provide state info
Container getContainer();
default void setupExpandable() {
Container container = getContainer();
container.expandLayout.getViewTreeObserver().addOnPreDrawListener(
new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
if (container.expandHeight == 0) {
final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
container.expandLayout.measure(widthSpec, heightSpec);
container.expandHeight = container.expandLayout.getMeasuredHeight();
}
container.expandLayout.getViewTreeObserver().removeOnPreDrawListener(this);
container.expandLayout.setVisibility(View.GONE);
container.expandAnimator = slideAnimator(0, container.expandHeight);
container.collapseAnimator = slideAnimator(container.expandHeight, 0);
return true;
}
});
}
default boolean isExpanded() {
return getContainer().mExpanded;
}
default void setExpanded(boolean expanded) {
Container container = getContainer();
container.mExpanded = expanded;
ViewGroup.LayoutParams layoutParams = container.expandLayout.getLayoutParams();
layoutParams.height = expanded ? container.expandHeight : 0;
container.expandLayout.setLayoutParams(layoutParams);
container.expandLayout.setVisibility(expanded ? View.VISIBLE : View.GONE);
}
default void expand() {
Container container = getContainer();
if (container.mExpanded) return;
container.expandLayout.setVisibility(View.VISIBLE);
container.expandAnimator.start();
container.mExpanded = true;
}
default void collapse() {
Container container = getContainer();
if (!container.mExpanded) return;
container.collapseAnimator.start();
container.mExpanded = false;
}
default ValueAnimator slideAnimator(int start, int end) {
Container container = getContainer();
ValueAnimator animator = ValueAnimator.ofInt(start, end);
animator.addUpdateListener(valueAnimator -> {
int value = (Integer) valueAnimator.getAnimatedValue();
ViewGroup.LayoutParams layoutParams = container.expandLayout.getLayoutParams();
layoutParams.height = value;
container.expandLayout.setLayoutParams(layoutParams);
});
return animator;
}
}

77
app/src/main/java/com/topjohnwu/magisk/components/ExpandableViewHolder.java
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@@ -1,77 +0,0 @@
package com.topjohnwu.magisk.components;
import android.animation.ValueAnimator;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewTreeObserver;
public abstract class ExpandableViewHolder extends RecyclerView.ViewHolder {
protected ViewGroup expandLayout;
private ValueAnimator expandAnimator, collapseAnimator;
private static int expandHeight = 0;
public boolean mExpanded = false;
public ExpandableViewHolder(View itemView) {
super(itemView);
setExpandLayout(itemView);
expandLayout.getViewTreeObserver().addOnPreDrawListener(
new ViewTreeObserver.OnPreDrawListener() {
@Override
public boolean onPreDraw() {
if (expandHeight == 0) {
final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
expandLayout.measure(widthSpec, heightSpec);
expandHeight = expandLayout.getMeasuredHeight();
}
expandLayout.getViewTreeObserver().removeOnPreDrawListener(this);
expandLayout.setVisibility(View.GONE);
expandAnimator = slideAnimator(0, expandHeight);
collapseAnimator = slideAnimator(expandHeight, 0);
return true;
}
});
}
public void setExpanded(boolean expanded) {
mExpanded = expanded;
ViewGroup.LayoutParams layoutParams = expandLayout.getLayoutParams();
layoutParams.height = expanded ? expandHeight : 0;
expandLayout.setLayoutParams(layoutParams);
expandLayout.setVisibility(expanded ? View.VISIBLE : View.GONE);
}
public void expand() {
if (mExpanded) return;
expandLayout.setVisibility(View.VISIBLE);
expandAnimator.start();
mExpanded = true;
}
public void collapse() {
if (!mExpanded) return;
collapseAnimator.start();
mExpanded = false;
}
public abstract void setExpandLayout(View itemView);
private ValueAnimator slideAnimator(int start, int end) {
ValueAnimator animator = ValueAnimator.ofInt(start, end);
animator.addUpdateListener(valueAnimator -> {
int value = (Integer) valueAnimator.getAnimatedValue();
ViewGroup.LayoutParams layoutParams = expandLayout.getLayoutParams();
layoutParams.height = value;
expandLayout.setLayoutParams(layoutParams);
});
return animator;
}
}