Develop Reference

How to fix TextView being rendered blank on new Activity

I'm trying to start another activity after clicking on a CardView inside a RecyclerView. The new activity renders after the click on any of the items inside the RecyclerView (It does the transition and changes the title TextView), but it does not show any of the TextView's inside the CardView on the layout.
The OnClick method is being set as an interface and being implemented in the first Activity.
Here is my first activity. I'm loading the data here from a SQLite database, but it's not relevant for the question to show the code from it.
public class MainActivity extends AppCompatActivity implements RecipeAdapterMain.OnCardListener {
private TextView tv;
ArrayList<RecipeObject> recipes = new ArrayList<>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
RecyclerView rv = findViewById(R.id.recipeListMain);
LinearLayoutManager llm = new LinearLayoutManager(this);
rv.setLayoutManager(llm);
RecipeAdapterMain adapter = new RecipeAdapterMain(recipes, this);
rv.setAdapter(adapter);
tv = findViewById(R.id.title);
}
#Override
public void onCardClick(int position) {
Intent intent = new Intent(this, RecipeActivity.class);
startActivity(intent);
}
}
This is my Adapter.
public class RecipeAdapterMain extends RecyclerView.Adapter<RecipeAdapterMain.RecipeListViewHolder> {
RecyclerView mRecyclerView;
ArrayList<RecipeObject> recipeList;
private OnCardListener mOnCardListener;
public RecipeAdapterMain(Context context, ArrayList<RecipeObject> recipeList, OnCardListener onCardListener) {
this.mOnCardListener = onCardListener;
this.recipeList = recipeList;
}
#Override
public void onAttachedToRecyclerView(RecyclerView recyclerView) {
mRecyclerView = recyclerView;
super.onAttachedToRecyclerView(recyclerView);
}
#Override
public RecipeListViewHolder onCreateViewHolder(ViewGroup parent, int i) {
View layoutView = LayoutInflater.from(parent.getContext()).inflate(R.layout.layout_recipe_main, parent, false);
RecipeListViewHolder rcv = new RecipeListViewHolder(layoutView, mOnCardListener);
return rcv;
}
#Override
public void onBindViewHolder(#NonNull RecipeListViewHolder holder, int position) {
holder.mName.setText(recipeList.get(position).getName());
}
#Override
public int getItemCount(){
return recipeList.size();
}
public class RecipeListViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
public TextView mName;
OnCardListener onCardListener;
public RecipeListViewHolder(final View view, OnCardListener onCardListener) {
super(view);
mName = view.findViewById(R.id.textViewTitle);
this.onCardListener = onCardListener;
view.setOnClickListener(this);
}
#Override
public void onClick(View v) {
onCardListener.onCardClick(getAdapterPosition());
}
}
public interface OnCardListener {
void onCardClick(int position);
}
}
My second activity:
public class RecipeActivity extends AppCompatActivity {
#Override
public void onCreate(#Nullable Bundle savedInstanceState, #Nullable PersistableBundle persistentState) {
super.onCreate(savedInstanceState, persistentState);
setContentView(R.layout.layout_recipe);
}
}
This is the layout from the second activity. (layout_recipe):
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content">
<androidx.cardview.widget.CardView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="#+id/textViewName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is a test"
android:textColor="#1A1A1A"
android:textSize="18sp" />
<TextView
android:id="#+id/textViewIngr"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is a test"
android:textColor="#1A1A1A"
android:textSize="18sp" />
<TextView
android:id="#+id/textViewDire"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="This is a test"
android:textColor="#1A1A1A"
android:textSize="18sp" />
</LinearLayout>
</androidx.cardview.widget.CardView>
</LinearLayout>
And this is the layout from the first activity (activity_main):
<?xml version="1.0" encoding="utf-8"?>
<androidx.coordinatorlayout.widget.CoordinatorLayout 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=".MainActivity">
<com.google.android.material.appbar.AppBarLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:theme="#style/AppTheme.AppBarOverlay">
</com.google.android.material.appbar.AppBarLayout>
<androidx.recyclerview.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/recipeListMain"
android:scrollbars="vertical">
</androidx.recyclerview.widget.RecyclerView>
<com.google.android.material.floatingactionbutton.FloatingActionButton
android:id="#+id/fab"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
app:backgroundTint="#color/colorAccent"
android:layout_gravity="end|bottom"
android:layout_margin="16dp"
android:layout_marginBottom="16dp"
android:contentDescription="#string/submit"
android:src="#drawable/ic_add_black_24dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
android:onClick="openActivityCreate"/>
</androidx.coordinatorlayout.widget.CoordinatorLayout>
From clicking in a Card on the MainActivity, I expected to render the second activity with it's TextViews (This is a test), but it's rendering a blank page instead.

try removing #Nullable PersistableBundle persistentState from onCreate on your second activity

How to show CardViews (with different content types) in RecyclerView

I'm trying to show an additional CardView that contains a different layout but have got lost with my code. I'm also unsure of how to to show the array of strings within a GridView for the CardView itself. Does anyone know where I may have gone wrong & what can be done so that the following can be achieved?:
Place the CardView containing the GridView wherever I want within the RecyclerView.
Show the array of strings in a GridView within a CardView
What I want to add to the RecyclerView (above the Item A CardView)
RecyclerView current contents
Fragment class
public class MyFragment extends android.support.v4.app.Fragment {
private MonRecyclerAdapterWithGrid adapterG;
static final String[] frenchVowels = new String[]{
"a", "e", "i", "o", "u", "y"
};
public MyFragment() {}
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_rv, container, false);
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
View v = getView();
assert v != null;
recyclerView = v.findViewById(R.id.my_recyclerview);
linearLayoutManager = new LinearLayoutManager(getActivity());
MyRecyclerAdapter adapter = new MyRecyclerAdapter(getContext(), getHeader(), getListItemsG(), getListItemsT());
recyclerView.setLayoutManager(linearLayoutManager);
recyclerView.setAdapter(adapter);
super.onActivityCreated(savedInstanceState);
}
RecyclerView recyclerView;
LinearLayoutManager linearLayoutManager;
public RecyclerViewHeader getHeader()
{
return new RecyclerViewHeader();
}
public List<RecyclerViewItemGV> getListItemsG() {
List<RecyclerViewItemGV> rvItemsG = new ArrayList<>();
RecyclerViewItemGV itemG = new RecyclerViewItemGV();
itemG.setTitleGV("Item A");
itemG.setVowelsGV(adapterG);
for (String fVowels : frenchVowels) {
// ?????? Still not working :-(
adapterG.addAdapterItem(new MyFragment.AdapterItem(frenchVowels));
}
rvItemsG.add(itemG);
return rvItemsG;
}
public List<RecyclerViewItemTV> getListItemsT()
{
List<RecyclerViewItemTV> rvItemsT = new ArrayList<>();
RecyclerViewItemTV itemA = new RecyclerViewItemTV();
itemA.setTitleTV("Item A");
itemA.setDescriptionTV("Feature A1");
rvItemsT.add(itemA);
RecyclerViewItemTV itemB = new RecyclerViewItemTV();
itemB.setTitleTV("Item B");
itemB.setDescriptionTV("Feature B1\nFeature B2");
rvItemsT.add(itemB);
RecyclerViewItemTV itemC = new RecyclerViewItemTV();
itemC.setTitleTV("Item C");
itemC.setDescriptionTV("Feature C1\nFeature C2\nFeature C3");
rvItemsT.add(itemC);
return rvItemsT;
}
}
RecyclerView adapter class
public class MyRecyclerAdapter extends RecyclerView.Adapter<RecyclerView.ViewHolder> {
private static final int TYPE_HEADER = 0;
private static final int TYPE_ITEMG = 1;
private static final int TYPE_ITEMT = 2;
private Context mContext;
RecyclerViewHeader header;
List<RecyclerViewItemGV> listItemsG;
List<RecyclerViewItemTV> listItemsT;
ValueAnimator mAnimator;
public MyRecyclerAdapter(Context context, RecyclerViewHeader header, List<RecyclerViewItemGV> listItemsG, List<RecyclerViewItemTV> listItemsT)
{
this.mContext = context;
this.header = header;
this.listItemsG = listItemsG;
this.listItemsT = listItemsT;
}
#Override
public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
if(viewType == TYPE_HEADER)
{
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_header_expandcollapsebuttons, parent, false);
return new MyRecyclerAdapter.VHHeader(v);
}
else if(viewType == TYPE_ITEMG)
{
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item_gv, parent, false);
return new MyRecyclerAdapter.VHItemG(v);
}
else if(viewType == TYPE_ITEMT)
{
View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.recyclerview_item_tv, parent, false);
return new MyRecyclerAdapter.VHItemT(v);
}
throw new RuntimeException("there is no type that matches the type " + viewType + " + make sure your using types correctly");
}
private RecyclerViewItemGV getItemG(int position)
{
return listItemsG.get(position);
}
private RecyclerViewItemTV getItemT(int position)
{
return listItemsT.get(position);
}
#Override
public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) {
final Typeface iconFont = FontManager.getTypeface(mContext, FontManager.FONTAWESOME);
if (holder instanceof MyRecyclerAdapter.VHHeader)
{
final MyRecyclerAdapter.VHHeader vhHeader = (MyRecyclerAdapter.VHHeader)holder;
}
else if (holder instanceof MyRecyclerAdapter.VHItemG){
RecyclerViewItemGV currentItemG = getItemG(position-1);
final MonRecyclerAdapterWithGrid.VHItemG vhItemG = (MyRecyclerAdapter.VHItemG)holder;
vhItemG.txtAG.setText(currentItemG.getTitleGV());
vhItemG.mGridViewG.setVisibility(View.GONE);
vhItemG.txtExpandCollapseG.setText(R.string.fa_icon_chevron_down);
vhItemG.txtExpandCollapseG.setTypeface(iconFont);
//Add onPreDrawListener
vhItemG.mGridViewG.getViewTreeObserver().addOnPreDrawListener(
new ViewTreeObserver.OnPreDrawListener() {
#Override
public boolean onPreDraw() {
vhItemG.mGridViewG.getViewTreeObserver().removeOnPreDrawListener(this);
vhItemG.mGridViewG.setVisibility(View.GONE);
final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
vhItemG.mGridViewG.measure(widthSpec, heightSpec);
vhItemG.mGridViewHeight = vhItemG.mGridViewG.getMeasuredHeight();
return true;
}
});
vhItemG.mCardViewG.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(vhItemG.mGridViewG.getVisibility() == View.GONE){
vhItemG.expandG();
} else {
vhItemG.collapseG();
}
}
});
}
else if (holder instanceof MyRecyclerAdapter.VHItemT)
{
RecyclerViewItemTV currentItem = getItemT(position-2);
final MyRecyclerAdapter.VHItemT vhItemT = (MyRecyclerAdapter.VHItemT)holder;
vhItemT.txtA.setText(currentItem.getTitleTV());
vhItemT.txtB.setText(currentItem.getDescriptionTV());
vhItemT.txtB.setVisibility(View.GONE);
vhItemT.txtExpandCollapse.setText(R.string.fa_icon_chevron_down);
vhItemT.txtExpandCollapse.setTypeface(iconFont);
//Add onPreDrawListener
vhItemT.txtB.getViewTreeObserver().addOnPreDrawListener(
new ViewTreeObserver.OnPreDrawListener() {
#Override
public boolean onPreDraw() {
vhItemT.txtB.getViewTreeObserver().removeOnPreDrawListener(this);
vhItemT.txtB.setVisibility(View.GONE);
final int widthSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
final int heightSpec = View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED);
vhItemT.txtB.measure(widthSpec, heightSpec);
vhItemT.textBHeight = vhItemT.txtB.getMeasuredHeight();
return true;
}
});
vhItemT.cardView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(vhItemT.txtB.getVisibility() == View.GONE){
vhItemT.expandT();
} else {
vhItemT.collapseT();
}
}
});
}
}
// need to override this method
#Override
public int getItemViewType(int position) {
if(isPositionHeader(position))
return TYPE_HEADER;
return TYPE_ITEMG;
return TYPE_ITEMT;
}
private boolean isPositionHeader(int position)
{
return position == 0;
}
#Override
public int getItemCount() {
return listItemsG.size()+1;
return listItemsT.size()+1;
}
class VHHeader extends RecyclerView.ViewHolder{
Button btnCollapseAll, btnExpandAll;
public VHHeader(View headerView) {
super(headerView);
this.btnCollapseAll = headerView.findViewById(R.id.btn_collapseall);
this.btnExpandAll = headerView.findViewById(R.id.btn_expandall);
}
}
public class VHItemG extends RecyclerView.ViewHolder{
CardView mCardViewG;
LinearLayout mLinearLayoutG;
RelativeLayout mRelativeLayoutG;
RecyclerView mRecyclerViewG;
GridView mGridViewG;
TextView txtExpandCollapseG, txtAG;
public int mGridViewHeight;
public VHItemG(View itemView) {
super(itemView);
this.mCardViewG = itemView.findViewById(R.id.cv_gv);
this.mLinearLayoutG = itemView.findViewById(R.id.linearlayout_gv_titlerow);
this.mRelativeLayoutG = itemView.findViewById(R.id.relativelayout_gv);
this.mRecyclerViewG = itemView.findViewById(R.id.my_recyclerview);
this.txtAG = itemView.findViewById(R.id.tv_gv_A);
this.txtExpandCollapseG = itemView.findViewById(R.id.tv_gv_expandcollapse);
this.mGridViewG = itemView.findViewById(R.id.gv_a);
}
private void expandG() {
// change visibility to 'VISIBLE'
mGridViewG.setVisibility(View.VISIBLE);
// change direction of chevron to 'up'
txtExpandCollapseG.setText(R.string.fa_icon_chevron_up);
// apply animation to the height of 'txtB'
mAnimator = slideAnimator(0, mGridViewHeight);
// start the animation
mAnimator.start();
}
private void collapseG() {
// change direction of chevron to 'down'
txtExpandCollapseG.setText(R.string.fa_icon_chevron_down);
int finalHeight = mGridViewG.getHeight();
ValueAnimator mAnimator = slideAnimator(finalHeight, 0);
mAnimator.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationEnd(Animator animator) {
// Height will be 0, but set visibility to 'GONE'
mGridViewG.setVisibility(View.GONE);
}
#Override
public void onAnimationStart(Animator animator) {
}
#Override
public void onAnimationCancel(Animator animator) {
}
#Override
public void onAnimationRepeat(Animator animator) {
}
});
mAnimator.start();
}
public ValueAnimator slideAnimator(int start, int end) {
ValueAnimator animator = ValueAnimator.ofInt(start, end);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
// update height
int value = (Integer) valueAnimator.getAnimatedValue();
ViewGroup.LayoutParams layoutParams = mGridViewG.getLayoutParams();
layoutParams.height = value;
mGridViewG.setLayoutParams(layoutParams);
}
});
return animator;
}
}
public class VHItemT extends RecyclerView.ViewHolder{
CardView cardView;
LinearLayout mLinearLayout;
RecyclerView mRecyclerView;
RelativeLayout mRelativeLayout;
TextView txtExpandCollapse, txtA, txtB;
public int textBHeight;
public VHItemT(View itemView) {
super(itemView);
this.cardView = itemView.findViewById(R.id.linearlayout_tv_main);
this.mLinearLayout = itemView.findViewById(R.id.linearlayout_tv_titlerow);
this.mRelativeLayout = itemView.findViewById(R.id.relativelayout_tv);
this.mRecyclerView = itemView.findViewById(R.id.my_recyclerview);
this.txtExpandCollapse = itemView.findViewById(R.id.tv_tv_expandcollapse);
this.txtA = itemView.findViewById(R.id.tv_tv_A);
this.txtB = itemView.findViewById(R.id.tv_tv_B);
}
private void expandT() {
// change visibility to 'VISIBLE'
txtB.setVisibility(View.VISIBLE);
// change direction of chevron to 'up'
txtExpandCollapse.setText(R.string.fa_icon_chevron_up);
// apply animation to the height of 'txtB'
mAnimator = slideAnimator(0, textBHeight);
// start the animation
mAnimator.start();
}
private void collapseT() {
// change direction of chevron to 'down'
txtExpandCollapse.setText(R.string.fa_icon_chevron_down);
int finalHeight = txtB.getHeight();
ValueAnimator mAnimator = slideAnimator(finalHeight, 0);
mAnimator.addListener(new Animator.AnimatorListener() {
#Override
public void onAnimationEnd(Animator animator) {
// Height will be 0, but set visibility to 'GONE'
txtB.setVisibility(View.GONE);
}
#Override
public void onAnimationStart(Animator animator) {
}
#Override
public void onAnimationCancel(Animator animator) {
}
#Override
public void onAnimationRepeat(Animator animator) {
}
});
mAnimator.start();
}
public ValueAnimator slideAnimator(int start, int end) {
ValueAnimator animator = ValueAnimator.ofInt(start, end);
animator.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
#Override
public void onAnimationUpdate(ValueAnimator valueAnimator) {
// update height
int value = (Integer) valueAnimator.getAnimatedValue();
ViewGroup.LayoutParams layoutParams = txtB.getLayoutParams();
layoutParams.height = value;
txtB.setLayoutParams(layoutParams);
}
});
return animator;
}
}
}
GridView adapter (currently excluded from project)
private class MyGVAdapter extends ArrayAdapter<AdapterItem> {
private List<AdapterItem> items = new ArrayList<>();
MyGVAdapter(Context context, int textviewid) {
super(context, textviewid);
}
void addAdapterItem(MyGVFragment.AdapterItem item) {
items.add(item);
}
#Override
public int getCount() {
return items.size();
}
#Override
public MyGVFragment.AdapterItem getItem(int position) {
return ((null != items) ? items.get(position) : null);
}
#Override
public long getItemId(int position) {
return position;
}
#NonNull
#Override
public View getView(final int position, View convertView, #NonNull final ViewGroup parent) {
View rowView;
if (convertView == null) {
rowView = getActivity().getLayoutInflater().inflate(R.layout.gridview_item, parent, false);
} else {
rowView = convertView;
}
TextView tv = rowView.findViewById(R.id.item_gridview);
tv.setText(items.get(position).first);
return rowView;
}
}
class AdapterItem {
String first;
AdapterItem(String first) {
this.first = first;
}
}
}
gridview_item.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<TextView
android:id="#+id/item_gridview"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingStart="0dp"
android:paddingEnd="10dp"
android:paddingTop="10dp"
android:paddingBottom="10dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textColor="?android:attr/textColorPrimary"
/>
</LinearLayout>
CardView with GridView (recyclerview_item_gv)
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:id="#+id/cv_gv"
android:layout_marginBottom="20dp"
>
<LinearLayout
android:id="#+id/lineralayout_gv_main"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp"
android:animateLayoutChanges="true">
<LinearLayout
android:id="#+id/linearlayout_gv_titlerow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="2dp"
android:weightSum="100">
<TextView
android:id="#+id/tv_gv_A"
android:layout_weight="90"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textColor="?android:attr/textColorPrimary"
style="#android:style/TextAppearance.Medium" />
<TextView
android:id="#+id/tv_gv_expandcollapse"
android:importantForAccessibility="no"
android:clickable="true"
android:focusable="true"
android:layout_weight="10"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:textColor="?android:attr/textColorPrimary"
style="#android:style/TextAppearance.Large" />
</LinearLayout>
<RelativeLayout
android:id="#+id/relativelayout_gv"
android:animateLayoutChanges="true"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<GridView
android:id="#+id/gv_a"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:columnWidth="100dp"
android:numColumns="auto_fit"
android:layout_marginBottom="20dp"
android:stretchMode="columnWidth" />
</RelativeLayout>
</LinearLayout>
</android.support.v7.widget.CardView>
CardView with TextView (recyclerview_item_tv.xml)
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:clickable="true"
android:focusable="true"
android:id="#+id/cv_tv"
android:layout_marginBottom="20dp">
<LinearLayout
android:id="#+id/linearlayout_gv_main"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="10dp"
android:animateLayoutChanges="true">
<LinearLayout
android:id="#+id/linearlayout_tv_titlerow"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:layout_marginBottom="2dp"
android:weightSum="100">
<TextView
android:id="#+id/tv_tv_A"
android:layout_weight="90"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:textColor="?android:attr/textColorPrimary"
style="#android:style/TextAppearance.Medium" />
<TextView
android:id="#+id/tv_tv_expandcollapse"
android:importantForAccessibility="no"
android:clickable="true"
android:focusable="true"
android:layout_weight="10"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_marginStart="10dp"
android:textColor="?android:attr/textColorPrimary"
style="#android:style/TextAppearance.Large" />
</LinearLayout>
<RelativeLayout
android:id="#+id/relativelayout_tv"
android:animateLayoutChanges="true"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<TextView
android:id="#+id/tv_B"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="?android:attr/textColorPrimary"
style="#android:style/TextAppearance.Large" />
</RelativeLayout>
</LinearLayout>
</android.support.v7.widget.CardView>

Ok so I made a quick example of how to do it. This is how the Activity class I'm posting looks like, all items are in the same RecyclerView:
Bear in mind, it might not look like your code because I am trying to use (At least for me) best practices, and also shorten the amount of code and classes by containing a lot of things in the same class.
Here is the Activity:
public class RecyclerActivity extends AppCompatActivity {
RecyclerView recycler;
ArrayList<String> data;
RecyclerView.Adapter<ViewHolder> adapter;
private static final int ITEM_TYPE = 100;
private static final int HEADER_TYPE = 101;
private static final int HEADER_TYPE_2 = 102;
private static final int GRID_TYPE = 103;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recycler);
// find recycler,
recycler = findViewById(R.id.recycler);
// set the layout
recycler.setLayoutManager(new LinearLayoutManager(this, LinearLayoutManager.VERTICAL, false));
// init data,
data = new ArrayList<>();
data.add("Item A");
data.add("Item B");
data.add("Item C");
// create the adapter
adapter = createAdapter();
// set the adapter
recycler.setAdapter(adapter);
}
// creates the adapter,
private RecyclerView.Adapter<ViewHolder> createAdapter() {
return new RecyclerView.Adapter<ViewHolder>() {
#NonNull
#Override
public ViewHolder onCreateViewHolder(#NonNull ViewGroup parent, int type) {
switch (type) {
case HEADER_TYPE:
// inflate the layout,
ViewHolder holderHeader1 = new ViewHolder(inflateHelper(R.layout.header, parent));
// set an on click to the view here to create only one object,
holderHeader1.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// do something
}
});
return holderHeader1;
case HEADER_TYPE_2:
// inflate the layout,
ViewHolder holderHeader2 = new ViewHolder(inflateHelper(R.layout.header, parent));
// set an on click to the view here to create only one object,
holderHeader2.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// do something
}
});
return holderHeader2;
case ITEM_TYPE:
// inflate the layout,
ViewHolder holderItem = new ViewHolder(inflateHelper(R.layout.item, parent));
// set an on click to the view here to create only one object,
holderItem.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// do something
}
});
return holderItem;
case GRID_TYPE:
// inflate the layout,
ViewHolder holderGrid = new ViewHolder(inflateHelper(R.layout.grid, parent));
// set an on click to the view here to create only one object,
holderGrid.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// do something
}
});
return holderGrid;
default:
// inflate the layout,
ViewHolder holderItemDefault = new ViewHolder(inflateHelper(R.layout.item, parent));
// set an on click to the view here to create only one object,
holderItemDefault.itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
// do something
}
});
return holderItemDefault;
}
}
/**
* Keep the viewholder simple and the all the view finding here. This way you
* only have one viewholder.
*/
#Override
public void onBindViewHolder(#NonNull ViewHolder viewHolder, int position) {
// go through the positions
switch (getItemViewType(position)) {
case HEADER_TYPE:
Button expandButton = viewHolder.itemView.findViewById(R.id.button);
expandButton.setText("Expand");
break;
case HEADER_TYPE_2:
Button collapseButton = viewHolder.itemView.findViewById(R.id.button);
collapseButton.setText("Collapse");
break;
case ITEM_TYPE:
// get the current item
String item = data.get(position - 3);
TextView title = viewHolder.itemView.findViewById(R.id.title);
title.setText(item);
break;
case GRID_TYPE:
break;
}
}
#Override
public int getItemCount() {
return data.size() + 3;
}
#Override
public int getItemViewType(int position) {
switch (position) {
case 0:
return HEADER_TYPE;
case 1:
return HEADER_TYPE_2;
case 2:
return GRID_TYPE;
default: return ITEM_TYPE;
}
}
};
}
private View inflateHelper(int resId, ViewGroup parent) {
return LayoutInflater.from(this).inflate(resId, parent, false);
}
// inner class for viewholder to use,
class ViewHolder extends RecyclerView.ViewHolder {
public ViewHolder(#NonNull View itemView) {
super(itemView);
}
}
}
You might notice that I have used one ViewHolder. This is a pattern I believe we should adopt because it simplifies code so much more. You can find the views you need in the onBind method and thus get away with using one for all types of views.
Also I add the on click listener in the onCreateViewHolder because it is much more efficient to set it there, and it allows for the viewholder to not be onClick specific.
As I said, you can use as many types as you want, you just need to check for it, and set it at the right position.
Here are the layout files if you are interested:
Header
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="4dp"
android:gravity="center">
<Button
android:id="#+id/button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Expand" />
</LinearLayout>
Item
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="16dp"
android:elevation="2dp"
android:layout_margin="16dp"
android:background="#drawable/rounded">
<TextView
android:id="#+id/title"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="wrap_content"
android:text="Item A"
android:textColor="#fff"/>
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_chevron_right"
android:tint="#fff"/>
</LinearLayout>
Grid Layout (I cheated a bit here because I didn't see a reason to not hardcode vowels, although you might need to do it dynamically)
<?xml version="1.0" encoding="utf-8"?>
<FrameLayout
xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="32dp"
android:layout_marginEnd="32dp"
android:layout_marginTop="16dp"
android:layout_marginBottom="16dp"
android:padding="16dp"
android:background="#drawable/rounded"
android:backgroundTint="#fff"
android:elevation="4dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingBottom="16dp"
android:text="French Vowels"
android:textStyle="bold"
style="#style/Base.TextAppearance.AppCompat.Medium"/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp">
<TextView
android:id="#+id/a"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="a"
style="#style/Base.TextAppearance.AppCompat.Medium"/>
<TextView
android:id="#+id/e"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="e"
style="#style/Base.TextAppearance.AppCompat.Medium"/>
<TextView
android:id="#+id/i"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="i"
style="#style/Base.TextAppearance.AppCompat.Medium"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="8dp">
<TextView
android:id="#+id/o"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="o"
style="#style/Base.TextAppearance.AppCompat.Medium"/>
<TextView
android:id="#+id/u"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="u"
style="#style/Base.TextAppearance.AppCompat.Medium"/>
<TextView
android:id="#+id/y"
android:layout_width="0dp"
android:layout_weight="1"
android:gravity="center"
android:layout_height="wrap_content"
android:text="y"
style="#style/Base.TextAppearance.AppCompat.Medium"/>
</LinearLayout>
</LinearLayout>
</FrameLayout>
Rounded Drawable
<?xml version="1.0" encoding="utf-8"?>
<shape android:shape="rectangle" xmlns:android="http://schemas.android.com/apk/res/android">
<solid android:color="#222"/>
<corners android:radius="6dp"/>
</shape>
For anyone reading, if you happen to use Kotlin, consider using my small library which eliminates this recycler view boilerplate to a simple chain of functions:
https://github.com/Pfuster12/BoilerCycle

android recyclerview show data only at first time

I have a problem ,I create recyclerview and its work fine at the first search data from api , it display fine but when I try to search with new data ( second time ) it is not display anything i try to test and debug every every thing work fine and new data enter to adapter and get the result fine and set adapter to recyclerview but it is not showing any thing
I try several method like use only one adapter and change it's list of Date and use notifyDataSetChange but not work still only show at the first time
Below activity is use to search get date ( use in searching data )
fromDate to toDate
DeliveryReportActivity.java
public class DeliveryReportActivity extends AppCompatActivity
implements DateDialogFromFragment.SelectDateFromInterface,
DateDialogToFragment.SelectDateToInterface {
Button btn_from;
Button btn_to;
EditText et_fromDate;
EditText et_toDate;
Button search_btn;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_delivery_report);
btn_from=(Button)findViewById(R.id.btn_fromDate);
btn_to=(Button)findViewById(R.id.btn_toDate);
et_fromDate = (EditText) findViewById(R.id.from_date);
et_toDate = (EditText) findViewById(R.id.to_date);
search_btn=(Button)findViewById(R.id.search_delivery_report_btn);
et_fromDate.setText(new SimpleDateFormat("yyyy-MM-dd").format(new
Date()));
et_toDate.setText(new SimpleDateFormat("yyyy-MM-dd").format(new
Date()));
btn_from.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DateDialogFromFragment dateDialogFragment = new
DateDialogFromFragment();
android.app.FragmentTransaction ft =
getFragmentManager().beginTransaction();
dateDialogFragment.show(ft, "DatePicker");
}
});
btn_to.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
DateDialogToFragment dateDialogFragment = new
DateDialogToFragment();
android.app.FragmentTransaction ft =
getFragmentManager().beginTransaction();
dateDialogFragment.show(ft, "DatePicker");
}
});
search_btn.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Bundle bundle=new Bundle();
bundle.putString("from",et_fromDate.getText().toString()+ "
00:00:00");
bundle.putString("to",et_toDate.getText().toString()+" 23:59:59");
Intent intent =new
Intent(DeliveryReportActivity.this,DeliveryReportListActivity.class);
intent.putExtras(bundle);
startActivity(intent);
}
});
}
#Override
public void onGetSelectFromDate(String fromDate) {
et_fromDate.setText(fromDate);
}
#Override
public void onGetSelectToDate(String toDate) {
et_toDate.setText(toDate);
}
}
and it's view activity_delivery_report.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
android:layout_margin="20dp"
android:orientation="vertical"
tools:context="com.exatech.groupsmsandroid.activity.
deliveryReport.DeliveryReportActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="#+id/btn_fromDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/From"
android:textSize="18dp" />
<EditText
android:id="#+id/from_date"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="2017-12-26" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="50dp"
android:orientation="horizontal">
<Button
android:id="#+id/btn_toDate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/to" />
<EditText
android:id="#+id/to_date"
android:text="2017-12-26"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:layout_centerInParent="true"
android:gravity="center"
android:layout_marginTop="20dp"
android:id="#+id/search_delivery_report_btn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#color/colorPrimary"
android:text="#android:string/search_go" />
</RelativeLayout>
</LinearLayout>
after I press the search button it's start new activity that show my recylerview the new activity is
DeliveryReportListActivity .java
public class DeliveryReportListActivity extends AppCompatActivity implements
DeliveryReportService.DeliveryReportServiceInterface {
private static final String TAG = "GSMS";
private Bundle bundle;
private RecyclerView recyclerView;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_delivery_report_list);
recyclerView = (RecyclerView) findViewById(R.id.delivery_report_rv);
}
#Override
protected void onResume() {
super.onResume();
bundle = getIntent().getExtras();
String from = bundle.getString("from");
String to = bundle.getString("to");
DeliveryReportService.getInstance(this).
getDeliveryReportFromDateToDate(from, to);// Call api get deliver
}
#Override
public void onGetDeliveryReport(Response<List<DeliveryReportResource>>
listResponse) {// response
Log.i(TAG, "onGetDeliveryReport: listResponse.body():" +
listResponse.body());
DeliveryReportAdapter deliveryReportAdapter = new
DeliveryReportAdapter(DeliveryReportListActivity.this, listResponse.body());
recyclerView.setAdapter(deliveryReportAdapter);
deliveryReportAdapter.notifyDataSetChanged();
Toast.makeText(DeliveryReportListActivity.this, "Delivery Report Success
", Toast.LENGTH_SHORT).show();
}
#Override
public void onDeliveryConnectionFailed() {
Toast.makeText(DeliveryReportListActivity.this, "Connect Error ",
Toast.LENGTH_SHORT).show();
}
}
and it's view activity_delivery_report_list.xml
<?xml version="1.0" encoding="utf-8"?>
<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"
android:orientation="vertical"
tools:context="com.exatech.groupsmsandroid.activity.deliveryReport.
DeliveryReportListActivity">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal">
<TextView
android:text="#string/text"
android:layout_weight="3"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_weight="4"
android:text="#string/phone_no"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<TextView
android:layout_weight="4"
android:text="#string/status"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
<android.support.v7.widget.RecyclerView
android:id="#+id/delivery_report_rv"
android:layout_width="match_parent"
app:layoutManager="LinearLayoutManager"
android:layout_height="match_parent"
tools:listitem="#layout/delivery_report_list_content"/>
</LinearLayout>
Below is Myadapter Class
**DeliveryReportAdapter.java**
public class DeliveryReportAdapter extends
RecyclerView.Adapter<DeliveryReportAdapter.ViewHolder> {
List<DeliveryReportResource> listDeliveryReport;
Context context;
public DeliveryReportAdapter(Context context, List<DeliveryReportResource>
listDeliveryReport) {
this.listDeliveryReport = listDeliveryReport;
this.context = context;
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view =
LayoutInflater.from(parent.getContext()).
inflate(R.layout.delivery_report_list_content, parent, false);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(final ViewHolder holder, int position) {
holder.item = listDeliveryReport.get(position);
holder.text.setText(holder.item.getText());
CustomAdapterFroDeliveryReport adapterFroDeliveryReport = new
CustomAdapterFroDeliveryReport(context, R.layout.two_text_contect,
listDeliveryReport.get(position).getSmsSubscribedRecipientsResourceList());
holder.phoneNoAndStatus.setAdapter(adapterFroDeliveryReport);
holder.view.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(context, "click message no=" +
holder.item.getText(), Toast.LENGTH_SHORT).show();
}
});
}
#Override
public int getItemCount() {
return listDeliveryReport.size();
}
class ViewHolder extends RecyclerView.ViewHolder {
View view;
TextView text;
ListView phoneNoAndStatus;
DeliveryReportResource item;
public ViewHolder(View itemView) {
super(itemView);
view = itemView;
text = (TextView) itemView.findViewById(R.id.message_tv);
phoneNoAndStatus = (ListView)
itemView.findViewById(R.id.phoneNo_and_status_lv);
}
}
}

Try to create an adapter once and then update items
Add next code to your adapter class
ArrayList<DeliveryReportResource> listDeliveryReport = new ArrayList<DeliveryReportResource>();
public DeliveryReportAdapter(Context context) {
this.context = context;
}
public void updateItems(List<DeliveryReportResource> list) {
listDeliveryReport.clear();
listDeliveryReport.addAll(list);
notifyDataSetChanged();
}
Then create adapter once in onCreate() and place it as global variable
And now you should call adapter.updateItems(...) every time you want to change data

Android RecyclerView Fixed Footer

Past few days I've been working on fixed footer for my recyclerview but so far I didn't get the result that I expected. I've already taken a look existing questions but got same result as before.It seems I 'm still missing a point but I can't figure out... Therefore I'm waiting for your suggestions. Thanks!
Here is the current view of layout, I want that FOOTER part to be sticky at bottom of recyclerview.
DrawerAdapter.java
public class DrawerAdapter extends RecyclerView.Adapter<DrawerAdapter.DrawerViewHolder> {
// Class for view types.
private class VIEW_TYPES {
public static final int Header = 0;
public static final int Normal = 1;
public static final int Footer = 2;
}
private ArrayList<DrawerItem> drawerMenuList;
private String userProfileName;
private String userProfileMail;
private Drawable userProfilePic;
private OnItemSelecteListener mListener;
public DrawerAdapter(ArrayList<DrawerItem> drawerMenuList, String name, String mail, Drawable profileImage) {
this.drawerMenuList = drawerMenuList;
this.userProfileMail = mail;
this.userProfileName = name;
this.userProfilePic = profileImage;
}
#Override
public DrawerViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
View view;
if (viewType == VIEW_TYPES.Header) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.header, parent, false);
} else if (viewType == VIEW_TYPES.Footer) {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.footer, parent, false);
} else {
view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_row, parent, false);
}
return new DrawerViewHolder(view, viewType);
}
#Override
public void onBindViewHolder(DrawerViewHolder holder, int position) {
// If item's position 0 it's a header.
if (position == 0) {
holder.headerName.setText(userProfileName);
holder.headerMail.setText(userProfileMail);
holder.headerProfile.setImageDrawable(userProfilePic);
} else if (position == 5) { // If position is 5 then it's footer.
holder.headerName.setText("FOOTER");
} else { // it's a menu item.
holder.title.setText(drawerMenuList.get(position - 1).getTitle());
holder.icon.setImageResource(drawerMenuList.get(position - 1).getIcon());
}
}
#Override
public int getItemCount() {
return drawerMenuList.size() + 1;
}
#Override
public int getItemViewType(int position) {
if (position == 0) {
return VIEW_TYPES.Header;
} else if (position == 5) {
return VIEW_TYPES.Footer;
} else {
return VIEW_TYPES.Normal;
}
}
class DrawerViewHolder extends RecyclerView.ViewHolder {
TextView title;
TextView headerName;
ImageView icon;
TextView headerMail;
ImageView headerProfile;
public DrawerViewHolder(View itemView, int viewType) {
super(itemView);
if (viewType == VIEW_TYPES.Header) {
headerName = (TextView) itemView.findViewById(R.id.header_name);
headerMail = (TextView) itemView.findViewById(R.id.header_email);
headerProfile = (ImageView) itemView.findViewById(R.id.circleView);
} else if (viewType == VIEW_TYPES.Footer) {
headerName = (TextView) itemView.findViewById(R.id.textView3);
} else {
title = (TextView) itemView.findViewById(R.id.title);
icon = (ImageView) itemView.findViewById(R.id.icon);
}
itemView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
mListener.onItemSelected(view, getAdapterPosition());
}
});
}
}
// To set click listener.
public interface OnItemSelecteListener {
void onItemSelected(View v, int position);
}
public void setOnItemClickLister(OnItemSelecteListener mListener) {
this.mListener = mListener;
}
}
MainActivity.java
for (int i = 0; i < navMenuTitles.length; i++) {
Log.e("I", String.valueOf(i));
mDrawerItemList.add(new DrawerItem(navMenuTitles[i], navMenuIcons.getResourceId(i, -1)));
}
mDrawerItemList.add(new DrawerItem());
mRecyclerView = (RecyclerView) findViewById(R.id.drawerRecyclerView);
mDrawerAdapter = new DrawerAdapter(mDrawerItemList, logged_user.name, logged_user.email, draw_userImage);
mLinearLayoutManager = new CustomGridLayoutManager(HomeScreenActivity.this){
#Override
public boolean canScrollVertically() {
return false;
}
};
mRecyclerView.setLayoutManager(mLinearLayoutManager);
mRecyclerView.setAdapter(mDrawerAdapter);
mDrawerLayout = (DrawerLayout) findViewById(R.id.DrawerLayout);
mDrawerToggle = new ActionBarDrawerToggle(HomeScreenActivity.this, mDrawerLayout, mToolbar, R.string.openDrawer, R.string.closeDrawer) {
#Override
public void onDrawerOpened(View drawerView) {
super.onDrawerOpened(drawerView);
// code here will execute once the drawer is opened( As I dont want anything happened whe drawer is
// open I am not going to put anything here)
}
#Override
public void onDrawerClosed(View drawerView) {
super.onDrawerClosed(drawerView);
// Code here will execute once drawer is closed
}
}; // Drawer Toggle Object Made
mDrawerLayout.addDrawerListener(mDrawerToggle); // Drawer Listener set to the Drawer toggle
mDrawerToggle.syncState(); // Finally we set the drawer toggle sync State
mDrawerAdapter.setOnItemClickLister(new DrawerAdapter.OnItemSelecteListener() {
#Override
public void onItemSelected(View v, int position) {
Log.e("CLICK", "You clicked at position: " + position);
}
});
drawer_layout.xml
<android.support.v4.widget.DrawerLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/DrawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:elevation="7dp">
<FrameLayout
android:id="#+id/containerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" />
<android.support.v7.widget.RecyclerView
android:id="#+id/drawerRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:layout_gravity="left"
android:background="#ffffff"
app:reverseLayout="false"
app:stackFromEnd="false">
</android.support.v7.widget.RecyclerView>
footer.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="bottom"
android:layout_alignParentBottom="true"
android:background="#ffffff"
android:layout_alignBottom="#id/drawerRecyclerView"
android:foregroundGravity="bottom">
<LinearLayout
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentStart="false"
android:layout_alignParentEnd="true"
android:background="#f16666"
android:foregroundGravity="bottom"
android:gravity="center_horizontal|bottom"
android:paddingTop="#dimen/_15sdp"
android:paddingBottom="#dimen/_15sdp">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="TEST"
android:id="#+id/textView3"
android:layout_gravity="center_horizontal"
android:layout_alignParentBottom="true"
android:gravity="center_horizontal|bottom" />
</LinearLayout>
</RelativeLayout>

In your drawer_layout.xml put RecyclerView inside a RelativeLayout and set alignParentTop to true. Then remove your footer view from your RecyclerView and put that inside the RelativeLayout below RecyclerView like this:
<android.support.v4.widget.DrawerLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:id="#+id/DrawerLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentBottom="true"
android:elevation="7dp">
<FrameLayout
android:id="#+id/containerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/drawerRecyclerView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_gravity="left"
android:background="#ffffff"
app:reverseLayout="false"
app:stackFromEnd="false" />
<include layout="#layout/footer" />
</RelativeLayout>
</android.support.v4.widget.DrawerLayout>
You could also take a look at NavigationView so you don't have to customize your drawer list. Here is a tutorial on how to use this. It is pretty easy to use and requires less code. You could then take a look at this answer on how to put a footer in NavigationView.

I am using LinearLayout with weight-ing (created multiple dimens files with different values). For me it works as excepted:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/white"
android:orientation="vertical"
<include layout="#layout/header" />
<android.support.v7.widget.RecyclerView
android:id="#+id/recycleView"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.5"
tools:layout_height="0dp"
tools:listitem="#layout/row" />
<TextView
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="#dimen/footer_weight"
android:padding="#dimen/extra_padding"
android:paddingEnd="#dimen/small_padding"
android:paddingLeft="#dimen/small_padding"
android:paddingRight="#dimen/small_padding"
android:paddingStart="#dimen/small_padding"
android:text="#string/contact"
android:textColor="#color/grey" />
</LinearLayout>

How to use buttons from different xml files in one class

I have a listview with multiple items and one button to start a new activity. I'm getting Null Pointer Exception when I run my app. How and where shoud I set the OnClickListener to run properly?
Also, how can I pass with Intent the arraylist named listaIngrediente?
Here is my code
main_activity.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin"
android:paddingBottom="#dimen/activity_vertical_margin"
tools:context="com.example.radu.fridgecheck.MainActivity"
android:orientation="vertical">
<ListView
android:id="#+id/listView1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1">
</ListView>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/find_recipies"
android:id="#+id/find"
android:layout_weight="0"/>
</LinearLayout>
list_item.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
android:padding="6dip" >
<CheckBox
android:id="#+id/checkBox"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:focusable="false"
android:focusableInTouchMode="false"/>
<TextView
android:id="#+id/name"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignBaseline="#+id/checkBox"
android:layout_alignBottom="#+id/checkBox"
android:layout_toRightOf="#+id/checkBox"
android:text="TextView" />
</RelativeLayout>
Adapter
public class Adapter extends ArrayAdapter<Ingredient> {
public LayoutInflater inflater;
public ArrayList<Ingredient> listaIngrediente;
ArrayList<String> ingredienteDisponibile;
private Activity activity;
public Adapter(Activity activity, int textResourceId, ArrayList<Ingredient> ingrediente) {
super(activity, textResourceId, ingrediente);
this.activity=activity;
this.listaIngrediente=ingrediente;
try {
inflater = (LayoutInflater) activity.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
} catch (Exception e) {
e.printStackTrace();
}
}
public int getCount() {
return listaIngrediente.size();
}
public long getItemId(int position) {
return position;
}
public View getView(int position, View convertView, ViewGroup parent) {
View v = convertView;
if (convertView == null) {
v = inflater.inflate(R.layout.list_item, null);
}
final Ingredient ingredients = getItem(position);
final TextView display_ingredients = (TextView) v.findViewById(R.id.name);
display_ingredients.setText(ingredients.getNameI());
final CheckBox checkBox = (CheckBox) v.findViewById(R.id.checkBox);
ListView listView = (ListView) v.findViewById(R.id.listView1);
Button button = (Button) v.findViewById(R.id.button);
listView.addFooterView(button);
Button find = (Button) v.findViewById(R.id.find);
find.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
Intent i = new Intent(getContext(), ShowRecipes.class);
Bundle args = new Bundle(); /// nu reusesc sa transfer obiectele
args.putSerializable("ARRAYLIST",listaIngrediente);
i.putExtra("BUNDLE",args);
activity.startActivity(i);
}
});
v.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if(!ingredients.isSelected()) {
checkBox.setChecked(true);
ingredients.setSelected(true);
}
else{
checkBox.setChecked(false);
ingredients.setSelected(false);
}
}
});
return v;
}
}

You have to write that in MainActivity class, because your button is in main_activity.xml
In MainActivity, write this method
public void showRecipes(View view) {
Intent i = new Intent(getContext(), ShowRecipes.class);
Bundle args = new Bundle(); /// nu reusesc sa transfer obiectele
args.putSerializable("ARRAYLIST",listaIngrediente);
i.putExtra("BUNDLE",args);
startActivity(i);
}
In Xml add onClick
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/find_recipies"
android:id="#+id/find"
android:onClick="showRecipes"
/>`
More Information on click Events
http://developer.android.com/guide/topics/ui/controls/button.html#HandlingEvents