Develop Reference

RecyclerView grid layout manager doesn't center items

I inherited some big project with a lot of legacy code and now I'm facing some weird stuff..
I need to make this screen have recyclerview with grid layout manager, 2 columns. This is what I get. Is there a way to center those icons in the middle of the screen? I tried with gravity, but nothing works. Maybe there is some thing inside all that legacy code that is making problem or this is just recyclerView's issue?
This is the item's layout (terrible, don't ask..)
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:descendantFocusability="blocksDescendants">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/color_view_controller_item_background"
android:orientation="vertical">
<TextView
android:id="#+id/textViewSceneKK"
android:layout_width="match_parent"
android:layout_height="#dimen/room_button_height"
android:layout_gravity="center"
android:layout_marginLeft="#dimen/row_filter_text_margin_left"
android:layout_marginRight="#dimen/row_filter_text_margin_left"
android:gravity="center"
android:shadowDx="-1"
android:shadowDy="-1"
android:shadowRadius="1"
android:textSize="#dimen/row_scene_kk_text_size" />
<TextView
android:id="#+id/textViewSceneName"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginBottom="#dimen/row_filter_text_margin_bottom"
android:layout_marginLeft="#dimen/row_filter_text_margin_left"
android:layout_marginRight="#dimen/row_filter_text_margin_left"
android:layout_marginTop="#dimen/row_filter_text_margin_top"
android:clickable="false"
android:gravity="center"
android:longClickable="false"
android:textColor="#color/main_text_color"
android:textSize="#dimen/row_browser_right_name_text_size" />
</LinearLayout>
<!--<View-->
<!--android:id="#+id/filterView"-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="match_parent"-->
<!--android:clickable="false"-->
<!--android:longClickable="false" />-->
<View
android:id="#+id/filterViewClick"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="?android:selectableItemBackground"
android:focusable="false"
android:focusableInTouchMode="false" />
And fragment't layout:
<customview.CustomRecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/recyclerView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scrollbars="none" />
And the code:
customRecyclerView.setHasFixedSize(false);
customRecyclerView.setLayoutManager(new GridLayoutManager(getContext(), 2));
customRecyclerView.addItemDecoration(new DividerItemDecoration(getContext(),
R.drawable.line_separator_empty, DividerItemDecoration.VERTICAL_LIST));
customRecyclerView.setAdapter(adapter);
CustomRecyclerView.java
public class CustomRecyclerView extends RecyclerView {
private boolean enableScroll = true;
public CustomRecyclerView(Context context) {
super(context);
}
public CustomRecyclerView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public CustomRecyclerView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public boolean isEnableScroll() {
return enableScroll;
}
public void setEnableScroll(boolean enableScroll) {
this.enableScroll = enableScroll;
}
#Override
public int computeVerticalScrollRange() {
return super.computeVerticalScrollRange();
}
#Override
public boolean onInterceptTouchEvent(MotionEvent e) {
if (enableScroll) {
return super.onInterceptTouchEvent(e);
}
return false;
}
}

You have to use layout gravity to make it center & need to change match-parent to wrap_content, also you have to assign layout gravity runtime. try this code:
Adapter item layout:
<?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_margin="10dp"
android:descendantFocusability="blocksDescendants"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="right"
android:id="#+id/top_header_rl"
android:background="#color/app_header_color"
android:orientation="vertical">
<TextView
android:id="#+id/textViewSceneKK"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:layout_marginLeft="10dp"
android:layout_marginRight="10dp"
android:gravity="center"
android:shadowDx="-1"
android:shadowDy="-1"
android:shadowRadius="1"
android:text="Heder name"
android:textSize="26sp" />
<TextView
android:id="#+id/textViewSceneName"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:clickable="false"
android:gravity="center"
android:text="Footer name"
android:longClickable="false"
android:textSize="25sp" />
</LinearLayout>
<!--<View-->
<!--android:id="#+id/filterView"-->
<!--android:layout_width="match_parent"-->
<!--android:layout_height="match_parent"-->
<!--android:clickable="false"-->
<!--android:longClickable="false" />-->
<View
android:id="#+id/filterViewClick"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:background="?android:selectableItemBackground"
android:focusable="false"
android:focusableInTouchMode="false" />
</FrameLayout>
Adapter Code:
public class CenterGridView extends RecyclerView.Adapter<CenterGridView.CenterGridViewViewHolder> {
private Context context;
public CenterGridView(Context context){
this.context =context;
}
#Override
public CenterGridViewViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
return new CenterGridViewViewHolder(LayoutInflater.from(context).inflate(R.layout.new_tiem,parent,false));
}
#Override
public void onBindViewHolder(CenterGridViewViewHolder holder, int position) {
if(position%2==0){
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT);
params.gravity = Gravity.RIGHT;
holder.top_header_rl.setLayoutParams(params);
}else{
FrameLayout.LayoutParams params = new FrameLayout.LayoutParams(FrameLayout.LayoutParams.WRAP_CONTENT, FrameLayout.LayoutParams.WRAP_CONTENT);
params.gravity = Gravity.LEFT;
holder.top_header_rl.setLayoutParams(params);
}
}
#Override
public int getItemCount() {
return 20;
}
class CenterGridViewViewHolder extends RecyclerView.ViewHolder{
private LinearLayout top_header_rl;
public CenterGridViewViewHolder(View itemView) {
super(itemView);
top_header_rl = (LinearLayout)itemView.findViewById(R.id.top_header_rl);
}
}
}
Main Activity layout:
<?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"
android:gravity="center_horizontal"
android:orientation="vertical">
<com.demostudies.CustomRecyclerView
android:id="#+id/tests"
android:layout_width="wrap_content"
android:layout_height="wrap_content"></com.demostudies.CustomRecyclerView>
</LinearLayout>
// Set Adapter
CustomRecyclerView customRecyclerView = (CustomRecyclerView)findViewById(R.id.tests);
customRecyclerView.setHasFixedSize(false);
customRecyclerView.setLayoutManager(new GridLayoutManager(this, 2));
customRecyclerView.setAdapter(new CenterGridView(this));

try this:
it's working for me
<androidx.recyclerview.widget.RecyclerView
android:id="#+id/recyclerView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
>
</androidx.recyclerview.widget.RecyclerView>

ViewStub inside custom view returning 'ViewStub must have a valid layoutResource'

I have implemented a custom view like this:
public class HeaderView extends LinearLayout {
#Bind(R.id.bill_summary_layout)
LinearLayout summaryLayout;
#Bind(R.id.bill_balance)
TextView balance;
#Bind(R.id.bill_closedate)
TextView closedDate;
#Bind(R.id.bill_status)
TextView status;
#Bind(R.id.bill_partial_overdue)
ViewStub partialOverdueView;
#Bind(R.id.bill_partial_closed)
ViewStub partialClosedView;
#Bind(R.id.bill_partial_open)
ViewStub partialOpenView;
Bill bill;
public HeaderView(Context context) {
super(context);
initUI(context);
}
public HeaderView(Context context, AttributeSet attrs) {
super(context, attrs);
initUI(context);
}
public HeaderView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
initUI(context);
}
private void initUI(Context context) {
LayoutInflater.from(context).inflate(R.layout.header_view, this);
}
public Bill getBill() {
return bill;
}
public void setBill(Bill bill) {
this.bill = bill;
notifyMustRebind();
}
public void notifyMustRebind() {
setupUI();
}
private void setupUI() {
if(this.bill == null)
throw new RuntimeException("O objeto bill tem que estar setado e nao ser nulo. Talvez esqueceu de chamar o setBill?");
switch (bill.getState()) {
case OVERDUE:
setOverdueState();
break;
case OPEN:
setOpenState();
break;
case CLOSED:
setClosedState();
break;
case FUTURE:
setFutureState();
break;
}
}
private void setOverdueState(){
summaryLayout.setBackgroundColor(ContextCompat.getColor(getContext(),R.color.overdue));
LayoutInflater.from(getContext()).inflate(R.layout.partial_overdue_view, this, true);
partialOverdueView.inflate();
}
private void setOpenState(){
summaryLayout.setBackgroundColor(ContextCompat.getColor(getContext(),R.color.open));
partialOpenView.inflate();
}
private void setClosedState(){
summaryLayout.setBackgroundColor(ContextCompat.getColor(getContext(),R.color.closed));
partialClosedView.inflate();
}
private void setFutureState(){
summaryLayout.setBackgroundColor(ContextCompat.getColor(getContext(),R.color.future));
}
#Override
protected void onFinishInflate() {
super.onFinishInflate();
ButterKnife.bind(this);
}
#Override
protected void onDetachedFromWindow() {
super.onDetachedFromWindow();
ButterKnife.unbind(this);
}
}
The header_view.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"
android:orientation="vertical">
<LinearLayout
android:id="#+id/bill_summary_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/bg_content_arrow"
android:backgroundTint="#color/colorAccent"
android:orientation="vertical"
android:paddingBottom="#dimen/header_margin"
android:paddingTop="#dimen/header_margin"
>
<TextView
android:id="#+id/bill_balance"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingBottom="#dimen/header_text_margin"
android:text="R$ 2.300,10"
android:textColor="#android:color/white"
android:textSize="22sp"
android:textStyle="bold"
/>
<TextView
android:id="#+id/bill_closedate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingBottom="#dimen/header_text_margin"
android:text="Vencimento 15 MAI"
android:textColor="#android:color/white"
android:textSize="18sp"
/>
<TextView
android:id="#+id/bill_status"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:paddingBottom="#dimen/header_text_margin"
android:text="Fechamento em 5 de Julho"
android:textAllCaps="true"
android:textColor="#android:color/white"
android:textSize="12sp"
/>
</LinearLayout>
<ViewStub
android:id="#+id/bill_partial_overdue"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout="#layout/partial_overdue_view"
/>
<ViewStub
android:id="#+id/bill_partial_closed"
layout="#layout/partial_closed_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<ViewStub
android:id="#+id/bill_partial_open"
layout="#layout/partial_open_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<View
android:layout_width="match_parent"
android:layout_height="1dp"
android:background="#color/colorAccent"/>
</LinearLayout>
The view above is inside another view called bill_view:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<br.com.leonardo2204.nubanktest.ui.custom.HeaderView
android:id="#+id/header_view"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingTop="#dimen/list_header_padding">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:paddingLeft="#dimen/list_header_padding"
android:paddingStart="#dimen/list_header_padding"
android:text="De 5 Mar até 5 abr"
android:textAllCaps="true" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentEnd="true"
android:layout_alignParentRight="true"
android:paddingEnd="#dimen/list_header_padding"
android:paddingRight="#dimen/list_header_padding"
android:text="Valores em R$"
android:textAllCaps="true" />
</RelativeLayout>
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="match_parent" />
</LinearLayout>
The view above is inflated inside a PagerAdapter, as this:
#Override
public Object instantiateItem(ViewGroup container, int position) {
View v = LayoutInflater.from(container.getContext()).inflate(R.layout.bill_view, container, false);
HeaderView header = (HeaderView) v.findViewById(R.id.header_view);
header.setBill(billList.get(position));
container.addView(v);
return v;
}
The problem is, I'm getting the stack trace below :
Process: br.com.leonardo2204.nubanktest, PID: 10815
java.lang.IllegalArgumentException: ViewStub must have a valid layoutResource
at android.view.ViewStub.inflate(ViewStub.java:289)
at br.com.leonardo2204.nubanktest.ui.custom.HeaderView.setClosedState(HeaderView.java:112)
at br.com.leonardo2204.nubanktest.ui.custom.HeaderView.setupUI(HeaderView.java:91)
at br.com.leonardo2204.nubanktest.ui.custom.HeaderView.notifyMustRebind(HeaderView.java:76)
at br.com.leonardo2204.nubanktest.ui.custom.HeaderView.setBill(HeaderView.java:72)
at br.com.leonardo2204.nubanktest.ui.adapter.ViewPagerAdapter.instantiateItem(ViewPagerAdapter.java:30)
at android.support.v4.view.ViewPager.addNewItem(ViewPager.java:870)
at android.support.v4.view.ViewPager.populate(ViewPager.java:1086)
at android.support.v4.view.ViewPager.populate(ViewPager.java:952)
at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1474)
at android.view.View.measure(View.java:17547)
What I am doing wrong ? Is there a better approach to inflate the header view other than inside instantiateView ?
Thanks !

USE
android:layout="#layout/xyz"
instead of
layout="#layout/xyz"

Android - How to layout and use a custom View?

I am writing an app on Android Studio and I am trying to create a custom view with a specific form I need, something like:
Custom View Example
(I used different colors to show how the layout is supposed to go)
Here's the xml:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal" android:layout_width="match_parent"
android:layout_height="150dp"
android:weightSum="2"
android:background="#android:color/holo_red_dark">
<LinearLayout
android:layout_width="0dp"
android:layout_height="match_parent"
android:orientation="vertical"
android:layout_weight="1"
android:paddingLeft="15dp"
android:paddingRight="15dp">
<TextView
android:layout_width="match_parent"
android:layout_height="75dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/hourLbl"
android:layout_gravity="center"
android:background="#android:color/holo_blue_bright"/>
<TextView
android:layout_width="match_parent"
android:layout_height="75dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/minuteLbl"
android:layout_gravity="center"
android:background="#android:color/holo_orange_dark"/>
</LinearLayout>
<TextView
android:layout_width="0dp"
android:layout_height="match_parent"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/actionName"
android:layout_weight="1"
android:gravity="center"
android:background="#android:color/darker_gray"/>
</LinearLayout>
The problem comes when I try to add this view to another layout in the app.. It comes as a blank square. I have been trying to look for an answer on how to properly do this, but nothing helps.
This is what I have in the xml of the activity where I want the view (ActionView):
<RelativeLayout 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" tools:context=".HomeActivity">
<...ActionView
android:layout_width="match_parent"
android:layout_height="150dp"
android:id="#+id/firstAction" />
</RelativeLayout>
Here's the ActionView's constructors I have (not sure what to do with them to be honest, just copied them from a tutorial):
public ActionView(Context context) {
super(context);
}
public ActionView(Context context, AttributeSet attrs) {
super(context, attrs);
TypedArray a = context.getTheme().obtainStyledAttributes(
attrs,
R.styleable.ActionView,
0, 0);
try {
mHourLbl = a.getString(R.styleable.ActionView_hourLbl);
mMinuteLbl = a.getString(R.styleable.ActionView_minuteLbl);
mActionName = a.getString(R.styleable.ActionView_actionName);
} finally {
a.recycle();
}
}
public ActionView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}

I think you're missing the most important part. You're not tying your layout to your ActionView object...
Add:
LayoutInflater.from(context).inflate(R.layout.<xml_of_action_view>, this, true);
inside your ActionView constructor.

Calculate margins from coordinates in android screen

i have a library to insert floating buttons in a layout (http://prolificinteractive.com/blog/2014/07/24/android-floating-action-button-aka-fab/)
Then, i have this layout:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:fontawesometext="http://schemas.android.com/apk/res-auto"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="16dp"
android:layout_marginTop="32dp"
android:layout_marginBottom="16dp"
android:layout_marginRight="16dp">
<com.beardedhen.androidbootstrap.FontAwesomeText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="16dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="4dp"
android:textSize="45sp"
android:textColor="#737373"
android:id="#+id/faIcon"
fontawesometext:fa_icon="fa-question" />
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text='"texto de ejemplo de pregunta"'
android:id="#+id/tvQuestion"
android:textColor="#color/primary"
android:textStyle="bold"
android:textSize="28sp"
android:typeface="monospace"
android:layout_marginLeft="16dp"
android:layout_marginTop="32dp"
android:layout_marginBottom="16sp" />
</LinearLayout>
<FrameLayout
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/frameConainter"
android:background="#color/dark_grey" />
</LinearLayout>
And i need to set the center of the button in the middle of framelayout top, like as the left image:
I have this in a custom view:
public class YesNoReplyView extends ReplyParentView {
private FloatingActionButton buttonYes;
private FloatingActionButton buttonNo;
public YesNoReplyView(Context context) {
super(context);
}
public YesNoReplyView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
#TargetApi(Build.VERSION_CODES.HONEYCOMB)
public YesNoReplyView(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
public void initializeComponents() {
int[] position = new int[2];
getLocationOnScreen(position);
buttonYes = new FloatingActionButton.Builder((Activity)getContext())
.withDrawable(getResources().getDrawable(R.drawable.ic_plus))
.withButtonColor(getResources().getColor(R.color.green_success))
.withGravity(Gravity.BOTTOM | Gravity.RIGHT)
.withMargins(0, 0, 16, 16)
.create();
buttonNo = new FloatingActionButton.Builder((Activity)getContext())
.withDrawable(getResources().getDrawable(R.drawable.ic_plus))
.withButtonColor(getResources().getColor(R.color.primary))
.withGravity(Gravity.BOTTOM | Gravity.RIGHT)
.withMargins(0, 0, 26, 26)
.create();
}
#Override
public String getResult() {
String result = "";
return result;
}
}
But i dont know how can i calculate the margins from the coordinates to set the view in the position i want..
Anyone knows any way better to do it this?(I cant use a XML layout..)

xml LinearLayout different behaviours

I am trying to create a custom button layout. I created an xml file "custom_button.xml" which I then inflate in the "ButtonLanguageSelection" class. In this class I added the onClickListener. I added this class to the "main_activity.xml". It behaves like it should except it won't receive any touch events. Then I copied the code from "custom_button.xml" and added it directly without inflating it, I just added the android:onClick parameter and in this way it worked. I can't find out what would be the problem, the layouts are the same.
Has some of you have similar problems? What could be the problem? I attached the code if it helps someone to find the problem.
Thank you for any help!
custom_button.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/button_language_selection_states"
android:weightSum="1"
android:clickable="true"
>
<TextView
android:id="#+id/textview_select_language"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:paddingTop="30px"
android:layout_weight="0.4"
android:textSize="21sp"
android:textColor="#333333"
/>
<View
android:layout_width="match_parent"
android:background="#drawable/gradient"
android:layout_height="1dp"
android:layout_margin="10px">
</View>
<TextView
android:id="#+id/textview_language"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="center"
android:paddingTop="40px"
android:layout_weight="0.6"
android:textSize="28sp"
android:textColor="#ffffff"
/>
</LinearLayout>
ButtonLanguageSelection
public class ButtonLanguageSelection extends LinearLayout
{
private TextView introductoryTextView;
private TextView language;
private final String TAG = "ButtonLanguageSelection";
public ButtonLanguageSelection(Context context) {
super(context);
}
public ButtonLanguageSelection(Context context, AttributeSet attrs)
{
super(context, attrs);
LayoutInflater layoutInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
layoutInflater.inflate(R.layout.button_language_selection, this);
introductoryTextView = (TextView)findViewById(R.id.textview_select_language);
language = (TextView)findViewById(R.id.textview_language);
this.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG, "onclick");
}
});
}
public ButtonLanguageSelection(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public void setIntroductoryTextView(String s)
{
introductoryTextView.setText(s);
}
public void setLanguage(String s)
{
language.setText(s);
}
}
main_activity.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:background="#drawable/screen_welcome_bg">
<defaultpackage.ButtonLanguageSelection
android:id="#+id/ButtonLanguageSelection_Slovene"
android:layout_width="341px"
android:layout_height="260px"
android:layout_marginRight="2px"/>
<defaultpackage.ButtonLanguageSelection
android:id="#+id/ButtonLanguageSelection_Italian"
android:layout_width="341px"
android:layout_height="260px"
android:layout_marginRight="2px"/>
<!--<defaultpackage.ButtonLanguageSelection-->
<!--android:id="#+id/ButtonLanguageSelection_English"-->
<!--android:layout_width="341px"-->
<!--android:layout_height="260px" />-->
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="341px"
android:layout_height="260px"
android:background="#drawable/button_language_selection_states"
android:weightSum="1"
android:clickable="true"
android:onClick="sendMessage"
>
<TextView
android:id="#+id/textview_select_language"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="center"
android:gravity="center_horizontal"
android:paddingTop="30px"
android:layout_weight="0.4"
android:textSize="21sp"
android:textColor="#333333"
/>
<View
android:layout_width="match_parent"
android:background="#drawable/gradient"
android:layout_height="1dp"
android:layout_margin="10px">
</View>
<TextView
android:id="#+id/textview_language"
android:layout_width="wrap_content"
android:layout_height="0dp"
android:layout_gravity="center"
android:paddingTop="40px"
android:layout_weight="0.6"
android:textSize="28sp"
android:textColor="#ffffff"
/>
</LinearLayout>

I think the problem is writing all the init code in only one constructor. Consider making an init function and call it from all the constructors. Also consider setting the onClick events listeners in your activity rather than than the layout constructor itself.