AnimateLayoutChanges doesn't work with RecyclerView
Solution 1
After a while I got a solution. I made a function to animate the recyclerView height.
JAVA
public class MainActivity extends AppCompatActivity {
private final String TAG = MainActivity.class.getSimpleName();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview);
Adapter adapter = new Adapter(recyclerView);
LinearLayoutManager linearLayoutManager = new LinearLayoutManager(this) {
@Override
public boolean canScrollVertically() {
return false;
}
};
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setAdapter(adapter);
recyclerView.setNestedScrollingEnabled(true);
View.OnClickListener listener = new View.OnClickListener() {
@Override
public void onClick(View view) {
view.setVisibility(View.GONE);
}
};
findViewById(R.id.test1).setOnClickListener(listener);
findViewById(R.id.test2).setOnClickListener(listener);
findViewById(R.id.test3).setOnClickListener(listener);
findViewById(R.id.test4).setOnClickListener(listener);
}
public void animateHeight(final View v, final int height) {
final int initialHeight = v.getMeasuredHeight();
int duration = 500;
Interpolator interpolator = new AccelerateInterpolator(2);
// I have to set the same height before the animation because there is a glitch
// in the beginning of the animation
v.getLayoutParams().height = initialHeight;
v.requestLayout();
Animation a = new Animation() {
@Override
protected void applyTransformation(float interpolatedTime, Transformation t) {
Log.d(TAG, "InterpolatedTime: " + interpolatedTime);
Log.d(TAG, "Collapsing height: " + (initialHeight - (int) (height * interpolatedTime)));
v.getLayoutParams().height = initialHeight - (int) (height * interpolatedTime);
v.requestLayout();
}
@Override
public boolean willChangeBounds() {
return true;
}
};
a.setDuration(duration);
a.setInterpolator(interpolator);
v.startAnimation(a);
}
class Adapter extends RecyclerView.Adapter<Adapter.Holder> {
RecyclerView mRecyclerView;
int size = 3;
public Adapter(RecyclerView recyclerView) {
mRecyclerView = recyclerView;
}
@Override
public Holder onCreateViewHolder(ViewGroup parent, int viewType) {
View view = getLayoutInflater().inflate(R.layout.item, parent, false);
return new Holder(view);
}
@Override
public void onBindViewHolder(Holder holder, int position) {
}
@Override
public int getItemCount() {
return size;
}
class Holder extends RecyclerView.ViewHolder {
public Holder(final View itemView) {
super(itemView);
itemView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
size--;
notifyItemRemoved(getAdapterPosition());
animateHeight((View) itemView.getParent(), itemView.getMeasuredHeight());
}
});
}
}
}
}
Solution 2
What worked for me was simply adding the following code to onCreate:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
((ViewGroup) findViewById(R.id.llRoot)).getLayoutTransition()
.enableTransitionType(LayoutTransition.CHANGING);
}
where llRoot
is your LinearLayout containing RecyclerView.
You do need to keep android:animateLayoutChanges="true"
on your LinearLayout, otherwise it crashes.
I believe if you want to support this below JellyBean, you would need your custom solution.
Explanation on the solution is here: https://proandroiddev.com/the-little-secret-of-android-animatelayoutchanges-e4caab2fddec
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Comments
-
Buntupana over 1 year
I have a screen with a Recyclerview and others Elements inside of LinearLayout. The problem is when I remove a item of the RecyclerView, animateLayoutChanges doesn't work in this case. Does anayone know why this happen??
XML
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.alvaro.resizetest.MainActivity"> <LinearLayout android:layout_width="match_parent" android:layout_height="wrap_content" android:animateLayoutChanges="true" android:orientation="vertical"> <android.support.v7.widget.RecyclerView android:id="@+id/recyclerview" android:layout_width="match_parent" android:layout_height="wrap_content"/> <LinearLayout android:id="@+id/test1" android:layout_width="match_parent" android:layout_height="50dp" android:background="@color/colorAccent" android:gravity="center_vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="LinearLayout" android:textColor="#FFFFFF" android:textSize="22sp"/> </LinearLayout> <LinearLayout android:id="@+id/test2" android:layout_width="match_parent" android:layout_height="50dp" android:background="@color/colorPrimaryDark" android:gravity="center_vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="LinearLayout" android:textColor="#FFFFFF" android:textSize="22sp"/> </LinearLayout> <LinearLayout android:id="@+id/test3" android:layout_width="match_parent" android:layout_height="50dp" android:background="@color/colorAccent" android:gravity="center_vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="LinearLayout" android:textColor="#FFFFFF" android:textSize="22sp"/> </LinearLayout> <LinearLayout android:id="@+id/test4" android:layout_width="match_parent" android:layout_height="50dp" android:background="@color/colorPrimaryDark" android:gravity="center_vertical"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="LinearLayout" android:textColor="#FFFFFF" android:textSize="22sp"/> </LinearLayout> </LinearLayout>
JAVA
public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recyclerview); Adapter adapter = new Adapter(); recyclerView.setLayoutManager(new LinearLayoutManager(this)); recyclerView.setAdapter(adapter); recyclerView.setNestedScrollingEnabled(true); View.OnClickListener listener = new View.OnClickListener() { @Override public void onClick(View view) { view.setVisibility(View.GONE); } }; findViewById(R.id.test1).setOnClickListener(listener); findViewById(R.id.test2).setOnClickListener(listener); findViewById(R.id.test3).setOnClickListener(listener); findViewById(R.id.test4).setOnClickListener(listener); } class Adapter extends RecyclerView.Adapter<Adapter.Holder>{ int size = 3; public Adapter() { } @Override public Holder onCreateViewHolder(ViewGroup parent, int viewType) { View view = getLayoutInflater().inflate(R.layout.item, parent, false); return new Holder(view); } @Override public void onBindViewHolder(Holder holder, int position) { } @Override public int getItemCount() { return size; } class Holder extends RecyclerView.ViewHolder { public Holder(final View itemView) { super(itemView); itemView.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { size --; notifyItemRemoved(getAdapterPosition()); } }); } } }