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Android Dynamic RecyclerView LayoutManager (when you are using RecyclerView in ScrollView, these layout manager will resize RecyclerView's height with their items.) / ListView Version - https://gist.github.com/NohSeho/5638005fa27763fd21f8
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import android.content.Context; | |
import android.support.v7.widget.GridLayoutManager; | |
import android.support.v7.widget.RecyclerView; | |
import android.view.View; | |
import android.view.ViewGroup; | |
public class DynamicGridLayoutManager extends GridLayoutManager { | |
private int spanCount = 1; | |
public DynamicGridLayoutManager(Context context, int spanCount) { | |
super(context, spanCount, VERTICAL, false); | |
this.spanCount = spanCount; | |
} | |
public DynamicGridLayoutManager(Context context, int spanCount, int orientation, boolean reverseLayout) { | |
super(context, spanCount, orientation, reverseLayout); | |
} | |
private int[] mMeasuredDimension = new int[2]; | |
@Override | |
public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, | |
int widthSpec, int heightSpec) { | |
final int widthMode = View.MeasureSpec.getMode(widthSpec); | |
final int heightMode = View.MeasureSpec.getMode(heightSpec); | |
final int widthSize = View.MeasureSpec.getSize(widthSpec); | |
final int heightSize = View.MeasureSpec.getSize(heightSpec); | |
int width = 0; | |
int height = 0; | |
for (int i = 0; i < ((double) getItemCount() / (double) spanCount); i++) { | |
if (getOrientation() == HORIZONTAL) { | |
measureScrapChild(recycler, i, | |
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED), | |
heightSpec, | |
mMeasuredDimension); | |
width = width + mMeasuredDimension[0]; | |
if (i == 0) { | |
height = mMeasuredDimension[1]; | |
} | |
} else { | |
measureScrapChild(recycler, i, | |
widthSpec, | |
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED), | |
mMeasuredDimension); | |
height = height + mMeasuredDimension[1]; | |
if (i == 0) { | |
width = mMeasuredDimension[0]; | |
} | |
} | |
} | |
switch (widthMode) { | |
case View.MeasureSpec.EXACTLY: | |
width = widthSize; | |
case View.MeasureSpec.AT_MOST: | |
case View.MeasureSpec.UNSPECIFIED: | |
} | |
switch (heightMode) { | |
case View.MeasureSpec.EXACTLY: | |
height = heightSize; | |
case View.MeasureSpec.AT_MOST: | |
case View.MeasureSpec.UNSPECIFIED: | |
} | |
setMeasuredDimension(width, height); | |
} | |
private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec, | |
int heightSpec, int[] measuredDimension) { | |
View view = recycler.getViewForPosition(position); | |
recycler.bindViewToPosition(view, position); | |
if (view != null) { | |
RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams(); | |
int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec, | |
getPaddingLeft() + getPaddingRight(), p.width); | |
int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec, | |
getPaddingTop() + getPaddingBottom(), p.height); | |
view.measure(childWidthSpec, childHeightSpec); | |
measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin; | |
measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin; | |
recycler.recycleView(view); | |
} | |
} | |
} |
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import android.content.Context; | |
import android.support.v7.widget.LinearLayoutManager; | |
import android.support.v7.widget.RecyclerView; | |
import android.view.View; | |
import android.view.ViewGroup; | |
public class DynamicLinearLayoutManager extends LinearLayoutManager { | |
public DynamicLinearLayoutManager(Context context) { | |
super(context, VERTICAL, false); | |
} | |
public DynamicLinearLayoutManager(Context context, int orientation, boolean reverseLayout) { | |
super(context, orientation, reverseLayout); | |
} | |
private int[] mMeasuredDimension = new int[2]; | |
@Override | |
public void onMeasure(RecyclerView.Recycler recycler, RecyclerView.State state, | |
int widthSpec, int heightSpec) { | |
final int widthMode = View.MeasureSpec.getMode(widthSpec); | |
final int heightMode = View.MeasureSpec.getMode(heightSpec); | |
final int widthSize = View.MeasureSpec.getSize(widthSpec); | |
final int heightSize = View.MeasureSpec.getSize(heightSpec); | |
int width = 0; | |
int height = 0; | |
for (int i = 0; i < getItemCount(); i++) { | |
if (getOrientation() == HORIZONTAL) { | |
measureScrapChild(recycler, i, | |
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED), | |
heightSpec, | |
mMeasuredDimension); | |
width = width + mMeasuredDimension[0]; | |
if (i == 0) { | |
height = mMeasuredDimension[1]; | |
} | |
} else { | |
measureScrapChild(recycler, i, | |
widthSpec, | |
View.MeasureSpec.makeMeasureSpec(i, View.MeasureSpec.UNSPECIFIED), | |
mMeasuredDimension); | |
height = height + mMeasuredDimension[1]; | |
if (i == 0) { | |
width = mMeasuredDimension[0]; | |
} | |
} | |
} | |
switch (widthMode) { | |
case View.MeasureSpec.EXACTLY: | |
width = widthSize; | |
case View.MeasureSpec.AT_MOST: | |
case View.MeasureSpec.UNSPECIFIED: | |
} | |
switch (heightMode) { | |
case View.MeasureSpec.EXACTLY: | |
height = heightSize; | |
case View.MeasureSpec.AT_MOST: | |
case View.MeasureSpec.UNSPECIFIED: | |
} | |
setMeasuredDimension(width, height); | |
} | |
private void measureScrapChild(RecyclerView.Recycler recycler, int position, int widthSpec, | |
int heightSpec, int[] measuredDimension) { | |
View view = recycler.getViewForPosition(position); | |
recycler.bindViewToPosition(view, position); | |
if (view != null) { | |
RecyclerView.LayoutParams p = (RecyclerView.LayoutParams) view.getLayoutParams(); | |
int childWidthSpec = ViewGroup.getChildMeasureSpec(widthSpec, | |
getPaddingLeft() + getPaddingRight(), p.width); | |
int childHeightSpec = ViewGroup.getChildMeasureSpec(heightSpec, | |
getPaddingTop() + getPaddingBottom(), p.height); | |
view.measure(childWidthSpec, childHeightSpec); | |
measuredDimension[0] = view.getMeasuredWidth() + p.leftMargin + p.rightMargin; | |
measuredDimension[1] = view.getMeasuredHeight() + p.bottomMargin + p.topMargin; | |
recycler.recycleView(view); | |
} | |
} | |
} |
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Thank you for the good work creating these two classes. It worked for me except the scrolling now is not smooth at all. Any suggestion how it can be fixed.