Develop Reference

Edit Custom Views programmatically

I created a layout like this:
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:id="#+id/rlMenu"
android:layout_centerHorizontal="true"
android:gravity="center"
android:layout_centerVertical="true">
<RelativeLayout
android:background="#drawable/dark_rectangle_bord"
android:id="#+id/rl1dia"
android:elevation="10dp"
android:layout_alignParentLeft="true"
android:layout_alignParentStart="true"
android:layout_width="#dimen/sizeCard"
android:layout_height="#dimen/sizeCard"
android:layout_marginBottom="#dimen/padding_bottom_cards"
android:layout_marginEnd="#dimen/padding_end_cards"
android:layout_marginRight="#dimen/padding_end_cards"
android:layout_marginLeft="#dimen/padding_start_cards"
android:layout_marginStart="#dimen/padding_start_cards"
android:layout_marginTop="#dimen/padding_top_cards">
<TextView
android:text="1º Dia"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="#+id/tv1dia"
android:textStyle="normal|bold"
android:textColor="#color/Branco"
android:layout_alignParentBottom="true"
android:padding="10dp"
android:textSize="#dimen/texto_pequeno"
android:gravity="center"
android:fontFamily="sans-serif"
android:layout_centerHorizontal="true"/>
<ImageView
app:srcCompat="#drawable/ic_calendario_1"
android:id="#+id/iv1dia"
android:layout_width="#dimen/sizeImage"
android:layout_height="#dimen/sizeImage"
android:layout_centerHorizontal="true"
android:layout_alignParentTop="true"
/>
After that, I had included it on my MainActivity.
<include
android:id="#+id/my_custom_view"
layout="#layout/custom_view></include>
But in this Custom View there are a RelativeLayout, a ImageView and a TextView. I need to create some Custom Views dynamically, sample as below.
How can i create this Custom View Programatically?
Ex.:
Button bt = new Button(MainActivity.this);
And how can I change the TextView, RelativeLayout, background and the ImageView programatically? Like:
CustomView cv = new CustomView(MainActivity.this);
cv.setImage(R.drawable.chips);
cv.setRlBackground(Color.WHITE);
cv.setText("Hello, World!");

You can use LayoutInflater for that
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View mView = (View) inflater.inflate(R.layout.custom_view, null);
View email = (View) mView.findViewById(R.id.email);
yourParentView.addView(mView);
But make sure when you add view to its parent call removeAllview() method of yourParentView

Maybe you want to create an actual custom View, using include will not create a custom View but will only inject in your layout that particular xml. So, create a class (in this case extends RelativeLayout but you can use whatever suits you here)
public class CustomView extends RelativeLayout {
private TextView textView;
private ImageView imageView;
public CustomView(Context context, AttributeSet attrs) {
super(context, attrs);
inflate(context, R.layout.custom_view, this);
imageView = (ImageView) findViewById(R.id.image_view);
textView = (TextView) findViewById(R.id.text_view);
}
public void setImage(int resId){
imageView.setImageResource(resId);
}
public void setText(String text){
textView.setText(text);
}
}
an xml of the layout of your custom View (custom_view.xml), you might want to use merge instead of include since you already have a parent layout (RelativeLayout in this case)
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android">
<TextView
android:id="#+id/text_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
/>
<ImageView
android:id="#+id/image_view"
android:layout_width="48dp"
android:layout_height="48dp"
/>
</merge>
add your custom view to the Activity layout like this, please note that you need to use the full name of the custom View class you're using, in this case com.example.lelloman.dummy.CustomView
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:id="#+id/activity_main"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="#dimen/activity_vertical_margin"
android:paddingLeft="#dimen/activity_horizontal_margin"
android:paddingRight="#dimen/activity_horizontal_margin"
android:paddingTop="#dimen/activity_vertical_margin">
<com.example.lelloman.dummy.CustomView
android:id="#+id/custom_view"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
</RelativeLayout>
and in your Activity
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.my_activity);
CustomView customView = (CustomView) findViewById(R.id.custom_view);
customView.setImage(R.drawable.some_icon);
customView.setText("Hello world");
}

Issue with ListView content (viewHolder is not altering views inside)

I've been looking for the answer to my problem, and I've found similar entries and have fixed some things but not the main problem.
When I run my code all thumbnails' images are the same and there is no text displaying in the TextViews, even though the Log.D is showing I'm changing the textViews to the correct texts and images.
My activity code:
ListView lvMaterias;
String[] materiasNombre;
int[] thumbnails={R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui,
R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui,
R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui,
R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui,
R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui,
R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui,
R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui,
R.drawable.thumbnailanato,
R.drawable.thumbnailbioqui};
List<materiaRow> materiasObjetos= new ArrayList<materiaRow>();
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_select);
//inicializar los arrays y todo
lvMaterias = (ListView)findViewById(R.id.lvMaterias);
materiasNombre=this.getResources().getStringArray(R.array.nombreMateria);
int i=0;
for (String nombre : materiasNombre){
Log.d("loop", nombre);
materiasObjetos.add(new materiaRow(thumbnails[i],nombre, "0%"));
}
lvMaterias.setAdapter(new materiasAdapter(getApplicationContext(), R.layout.rowmateria, materiasObjetos));
}
}
My Adapter Class, the log.d at the getView method show I have the correct text and images, but textViews are not getting changes:
public class materiasAdapter extends ArrayAdapter implements View.OnClickListener{
private int layout;
public materiasAdapter(Context context, int resource, List objects) {
super(context, resource, objects);
layout=resource;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
materiaHolder mH;
if (convertView==null){
mH= new materiaHolder();
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
convertView= inflater.inflate(layout, parent, false);
mH.thumbnail= (ImageView) convertView.findViewById(R.id.ivthumbnail);
mH.materia= (TextView) convertView.findViewById(R.id.tvmateria);
mH.porcentaje= (TextView) convertView.findViewById(R.id.tvporcentaje);
mH.favorito = (Button) convertView.findViewById(R.id.bfavoritos);
mH.favorito.setOnClickListener(this);
convertView.setTag(mH);
}
else {
mH= (materiaHolder) convertView.getTag();
}
materiaRow mR= (materiaRow) getItem(position);
mH.thumbnail.setImageResource(mR.getThumbnail());
mH.porcentaje.setText(mR.getPorcentaje());
Log.d("thumbnail", Integer.toString(mR.getThumbnail()));
mH.materia.setText(mR.getMateria());
Log.d("texto", mR.getMateria());
return convertView;
}
#Override
public void onClick(View v) {
}
class materiaHolder {
ImageView thumbnail;
TextView materia;
TextView porcentaje;
Button favorito;
}
}
XML as requested (Select Activity):
<?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:orientation="vertical"
tools:context="com.example.quetzal.elite.Select">
<LinearLayout
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="wrap_content"></LinearLayout>
<ListView
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:id="#+id/lvMaterias" />
And rowMateria (resource of the adapter class):
<?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="horizontal">
<ImageView
android:layout_width="50dp"
android:layout_height="50dp"
android:id="#+id/ivthumbnail" />
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp" >
<TextView
android:layout_width="wrap_content"
android:layout_height="50dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/tvmateria" />
</LinearLayout>
<LinearLayout
android:orientation="vertical"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingLeft="20dp">
<TextView
android:layout_width="wrap_content"
android:layout_height="50dp"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="Large Text"
android:id="#+id/tvporcentaje" />
</LinearLayout>
<Button
android:layout_width="wrap_content"
android:layout_height="50dp"
android:text="fav"
android:id="#+id/bfavoritos" />
</LinearLayout>
Thanks in advance for the help.

As far as the issue with the thumgnail goes... In your main onCreate(), it doesn't look like you aren't adding the rows correctly.
int i=0;
for (String nombre : materiasNombre){
Log.d("loop", nombre);
materiasObjetos.add(new materiaRow(thumbnails[i],nombre, "0%"));
}
You need to increment i, or you will always get thumbnails[0].

When I ran your code, for whatever reason on my emulator, the text color and background color were the same - So the text was being set, but you could not see it.
You can set up your background on the activity as something specific like
android:background="#android:drawable/screen_background_dark"
and the text with something like
android:textColor="#android:color/primary_text_light"
I'm not very well versed on the preferred methods of setting the background and text colors - longer term you should be looking at the themes I believe.

Try making the ViewHolder class static like here:
https://github.com/isaacurbina/ViewHolderListView/blob/master/app/src/main/java/com/mac/isaac/viewholderlistview/MyArrayAdapter.java
Hope it helps!

How do I add a colour to the top of my android cardviews, like in image?

I've wrote a small application, which shows several android cards. But I'd like to be able to set a colour and title to the top of the card like in the image below, so far I haven't found any information online how to do this. So some help would be fantastic :-)
(My code so far does not accomplish the above, so far my code just produces regular all white cardviews)
My code so far is below:
CardAdapter.java
public class CardAdapter extends RecyclerView.Adapter<CardAdapter.ViewHolder> {
public List<TTItem> posts = new ArrayList<>();
public void addItems(List<TTItem> items) {
posts.addAll(items);
notifyDataSetChanged();
}
public void clear() {
posts.clear();
notifyDataSetChanged();
}
#Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
Context context = parent.getContext();
View view = View.inflate(context, R.layout.item_cardview, null);
return new ViewHolder(view);
}
#Override
public void onBindViewHolder(ViewHolder holder, int position) {
holder.mTextView.setText(posts.get(position).title);
Picasso.with(holder.mImageView.getContext()).load(posts.get(position).images[0]).into(holder.mImageView);
}
#Override
public int getItemCount() {
return posts.size();
}
static class ViewHolder extends RecyclerView.ViewHolder {
public TextView mTextView;
public ImageView mImageView;
public ViewHolder(View view) {
super(view);
mTextView = (TextView) view.findViewById(R.id.textview);
mImageView = (ImageView) view.findViewById(R.id.imageView);
}
}
}
MainActivity.java
public class MainActivity extends ActionBarActivity implements SwipeRefreshLayout.OnRefreshListener {
#InjectView(R.id.mainView)
RecyclerView mRecyclerView;
#InjectView(R.id.refreshContainer)
SwipeRefreshLayout refreshLayout;
private LinearLayoutManager mLayoutManager;
private CardAdapter mAdapter;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ButterKnife.inject(this);
mRecyclerView.setHasFixedSize(true);
refreshLayout.setOnRefreshListener(this);
TypedValue tv = new TypedValue();
int actionBarHeight = 0;
if (getTheme().resolveAttribute(R.attr.actionBarSize, tv, true)) {
actionBarHeight = TypedValue.complexToDimensionPixelSize(tv.data, getResources().getDisplayMetrics());
}
refreshLayout.setProgressViewEndTarget(true, actionBarHeight);
mAdapter = new CardAdapter();
mRecyclerView.setAdapter(mAdapter);
// use a linear layout manager
mLayoutManager = new GridLayoutManager(this, 1);
mRecyclerView.setLayoutManager(mLayoutManager);
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
return true;
}
#Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
return super.onOptionsItemSelected(item);
}
#Override
public void onRefresh() {
mAdapter.clear();
Handler handler = new Handler();
handler.postDelayed(new Runnable() {
public void run() {
refreshLayout.setRefreshing(false);
}
}, 2500);
}
}
Activity_main.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<android.support.v4.widget.SwipeRefreshLayout
android:id="#+id/refreshContainer"
android:layout_width="match_parent"
android:layout_height="match_parent">
<android.support.v7.widget.RecyclerView
android:id="#+id/mainView"
android:scrollbars="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent" />
</android.support.v4.widget.SwipeRefreshLayout>
</LinearLayout>
item_cardview.xml:
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:layout_width="200dp"
android:layout_height="200dp"
android:padding="10dp"
card_view:cardCornerRadius="2dp"
card_view:contentPadding= "5dp"
card_view:cardUseCompatPadding="true"
>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<ImageView
android:id="#+id/imageView"
android:layout_width="match_parent"
android:layout_height="150dp"
android:scaleType="centerCrop"/>
<TextView
android:id="#+id/textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textStyle="bold"
android:layout_gravity="center"/>
</LinearLayout>
</android.support.v7.widget.CardView>
The only change I've made from yours is, card_view:cardCornerRadius="8dp"> and removed the imageview(as no longer needed)
Screenshot of flashcard not filling to half of card:

I believe this is (almost) exact layout of what you want. It is pretty self-explanatory but feel free to ask if something's not clear.
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:card_view="http://schemas.android.com/apk/res-auto"
android:id="#+id/card_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
app:cardElevation="8dp"
card_view:cardCornerRadius="2dp">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical">
<LinearLayout <!-- This is the specific part you asked to color -->
android:id="#+id/heading_layout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#color/teal_500"
android:padding="36dp"
android:orientation="vertical">
<TextView
android:id="#+id/tv_heading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="22 mins to Ancona"
android:textColor="#color/white"
android:textStyle="bold"
android:textSize="36sp" />
<TextView
android:id="#+id/tv_subheading"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginTop="24dp"
android:layout_below="#+id/tv_heading"
android:text="Light traffic on ss16"
android:textColor="#color/teal_200"
android:textSize="24sp" />
</LinearLayout>
<ImageView
android:id="#+id/iv_map"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:contentDescription="Assigned delivery boy"
android:scaleType="fitXY"
android:src="#drawable/bg_map" />
<TextView
android:id="#+id/tv_footer"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:layout_below="#+id/tv_heading"
android:text="It is just an example!"
android:textColor="#color/grey_500"
android:textStyle="bold"
android:textSize="24sp" />
</LinearLayout>
</android.support.v7.widget.CardView>
I have replaced your mapFragment (presumably) with imageView to reduce complications.
Update: As the question now addresses the infamous "round corner" problem, this is actually by design. Yes, it is a big flaw. But the solution (as given in docs Here) would be to use card_view:cardPreventCornerOverlap="false" attribute (which I don't think does anything good because it just makes card square again).
See these questions for a good reference to this problem:
Appcompat CardView and Picasso no rounded Corners
Make ImageView fit width of CardView

From my understanding, you can change the colour of a CardView in it's entirety but not parts of it. I'm not sure how that would even work.
What you can do, is nest a TextView with the title within the CardView, then colour the background of the TextView to the colour you would like. Use appropriate margins/padding for a uniform look. Add a background to your TextView and see what you get.
Your TextView is already using the match_parent parameter on your android:layout_width="" so you would only need to add the background like so:
<TextView
android:id="#+id/textview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="20sp"
android:textStyle="bold"
android:layout_gravity="center"
android:background="#FF4444"/>
To change the entire CardView colour like I mentioned at the beginning you can do it the same way or programmatically like so:
cardView.setCardBackgroundColor(COLOURHERE);

How to right align PreferencesActivity in android?

I have PreferencesActivity which I need it to be right aligned because I want to use Arabic language, I tried to use android:layout_gravity="right" for PreferenceScreen but it didn't work.
This is my XML:
<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" android:layout_gravity="right">
<PreferenceCategory android:title="General Settings">
<CheckBoxPreference
android:title="Full Screen"
android:defaultValue="false"
android:summary="Always view as Full Screen"
android:key="fullScreenPref" />
<Preference
android:title="Report Bugs"
android:summary="Notify us for any Bugs or Errors"
android:key="bugs"/>
<Preference
android:title="About"
android:summary="Version 1.0.0"
android:key="about"/>
</PreferenceCategory>
</PreferenceScreen>
This is how I use the XML inside PreferencesActivity:
addPreferencesFromResource(R.layout.preferences);

After spending some time searching about our shared question, I found nothing useful. obviosly android api doesn't support RTL prefefrences. it means no support for persian/hebrew/arabic languages. But afterall I tried to find some way to right align an editText. I drived EditTextPreference class and implemented onCreateView method again.
here is my code:
/**
* Created by omid on 1/12/14.
*/
public class RtlTextPreference extends EditTextPreference {
public RtlTextPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
#Override
protected View onCreateView(ViewGroup parent) {
View view = super.onCreateView(parent);
RelativeLayout layout = (RelativeLayout) ((LinearLayout) view).getChildAt(1);
layout.setGravity(Gravity.RIGHT);
return view;
}
}
the rest of the preferences in the standard android api should be the same(btw I haven't tried yet).
maybe someday we should fully implement rtl support in android preferences and host it on github.
Hope this code snippet helps you.

Unfortunately the base Preference components (PreferenceScreen, Preference, etc.) are implemented in a fairly non-configurable way. They are designed to work in a specific way and are not terribly customizable.
In order to do what you want, you will probably have to implement your own version of PreferenceScreen (or possible just the Preference types you are using such as CheckBoxPreference). The way it is designed, when it inflates XML layouts it assumes a lot of things about them and handles it for you (text size, padding, layout, wrapping, etc). This is great if you want it to look like the default, but not so great if you need to tweak these configurations.
(note: if you don't want to implement preferencescreen you could just use a listview and treat it as a preference page. However, either way you basically have to implement your own version of preferences.)
(note2: based on other questions I've seen about arabic text, it's POSSIBLE android is smart enough to try to right align it by default. However, I would be surprised if this was the case. Still, it's worth a try.)
Sorry I don't have a better answer for you.

In your manifest file under application tag add this line,
android:supportsRtl="true"

After checking for a few solutions i came upon something that might help.
It's not elegant and works only on 4 and up but it's better than nothing...
add this code to onResume()
Locale locale = new Locale("iw");// Hebrew in this case
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
getBaseContext().getResources().updateConfiguration(config,
getBaseContext().getResources().getDisplayMetrics());
Of course you can choose to change the locale in your preference activities onResume() method only in your MainActivity's onResume() change locale back to your preferred (or user defined) locale.
Hope this helps!

Alright, this might be quite late, but anyways if you are targeting Android 3.0 or higher, you should use PreferenceFragment with can be somehow made RTL.
So you should create a fragment in your code like this:
import android.os.Bundle;
import android.preference.PreferenceFragment;
public class SettingsFragment extends PreferenceFragment {
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.preferences);
}
}
now you should create an Activity that adds this fragment to its layout.
You can create a layout for your activity and put the fragment in it via xml element or using the FragmentManager class. But the key to make the preferences Right-To-Left is to put a layout_direction="rtl" attribute in the layout file for a parent element of the fragment. i.e.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
android:id="#+id/rootView"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layoutDirection="rtl"
android:orientation="vertical">
<fragment
class="blah.blah.SettingsFragment"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</RelativeLayout>
Notice the android:layoutDirection="rtl" on the RelativeLayout element that fixes the problem.
Now add the Activity Java code like any other activity and add to your manifest file.
Hope it's not too late :)

same as my problem and this is the solution:
inside your PreferenceFragment:
#Override
public View onCreateView(LayoutInflater paramLayoutInflater,
ViewGroup paramViewGroup, Bundle paramBundle) {
getActivity().setTitle(R.string.fragment_title_settings);
View v = super.onCreateView(paramLayoutInflater, paramViewGroup,
paramBundle);
rtlView(v);
return v;
}
public void rtlView(View v){
if(v instanceof ListView){
rtllater((ListView) v);
}
else
if(v instanceof ViewGroup){
if(v instanceof RelativeLayout){
((RelativeLayout)v).setGravity(Gravity.RIGHT);
}
else
if(v instanceof LinearLayout){
((LinearLayout)v).setGravity(Gravity.RIGHT);
}
for (int i=0;i<((ViewGroup)v).getChildCount();i++){
rtlView(((ViewGroup)v).getChildAt(i));
}
}
else
if(v instanceof TextView){
v.getLayoutParams().width=v.getLayoutParams().MATCH_PARENT;
((TextView)v).setGravity(Gravity.RIGHT);
}
}
public void rtllater(ListView v){
v.setOnHierarchyChangeListener(new ViewGroup.OnHierarchyChangeListener() {
#Override
public void onChildViewAdded(View view, View view1) {
rtlView(view1);
}
#Override
public void onChildViewRemoved(View view, View view1) {
}
});
}
the result is like this image:right to left Preference

In my point of view this can be the solution:
Set each view's LayoutDirection to rtl;
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = super.onCreateView(inflater, container, savedInstanceState);
view.setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
return view;}

for preferences fragment you can make its container to have this attribute
android:layoutDirection="rtl"

public class RtlEditTextPreference extends EditTextPreference {
#Override
protected View onCreateView(ViewGroup parent) {
View view = super.onCreateView(parent);
RelativeLayout relativeLayout = (RelativeLayout)(((LinearLayout)view).getChildAt(1));
relativeLayout.setGravity(Gravity.RIGHT);
TextView title = (TextView) relativeLayout.getChildAt(0);
TextView summary = (TextView) relativeLayout.getChildAt(1);
RelativeLayout.LayoutParams titleLayoutParams = (RelativeLayout.LayoutParams)title.getLayoutParams();
titleLayoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
title.setLayoutParams(titleLayoutParams);
RelativeLayout.LayoutParams summaryLayoutParams = (RelativeLayout.LayoutParams)summary.getLayoutParams();
summaryLayoutParams.addRule(RelativeLayout.ALIGN_RIGHT, title.getId());
summaryLayoutParams.addRule(RelativeLayout.ALIGN_LEFT, -1); // Override default left alignment to the title
summary.setLayoutParams(summaryLayoutParams);
return view;
}
}

create a layout xml file called preference_checkbox.xml paste this (change the color to what you want, only the gravity and the width set to fill parent are important):
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent" android:layout_height="wrap_content"
android:minHeight="?android:attr/listPreferredItemHeight"
android:gravity="center_vertical" android:paddingRight="?android:attr/scrollbarSize">
<RelativeLayout android:layout_width="wrap_content"
android:layout_height="wrap_content" android:layout_marginLeft="15dip"
android:layout_marginRight="6dip" android:layout_marginTop="6dip"
android:layout_marginBottom="6dip" android:layout_weight="1">
<TextView android:id="#+android:id/title"
android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="right"
android:singleLine="true" android:textAppearance="?android:attr/textAppearanceMedium"
android:ellipsize="marquee" android:fadingEdge="horizontal"
android:textColor=#000000 />
<TextView android:id="#+android:id/summary"
android:layout_width="fill_parent" android:layout_height="wrap_content" android:gravity="right"
android:layout_below="#android:id/title" android:layout_alignLeft="#android:id/title"
android:textAppearance="?android:attr/textAppearanceSmall" android:textColor=#000000
android:maxLines="4" />
</RelativeLayout>
<!-- Preference should place its actual preference widget here. -->
<LinearLayout android:id="#+android:id/widget_frame"
android:layout_width="wrap_content" android:layout_height="match_parent"
android:gravity="center_vertical" android:orientation="vertical" />
</LinearLayout>
and then in the preferences xml file for each row in the settings list that you want to right align add this: android:layout="#layout/preference_checkbox"
thats it!
got the solution from : http://stackoverflow.com/questions/7094584/checkboxpreference-with-own-layout
the question there was about check box with image but it's the same technique.

You could do that by using a custom layout with calling setLayoutResource(int layoutResId).
res/layout/preference_layout.xml: (Note that this is based on HoloEverywhere library org.holoeverywhere.preference.Preference)
<?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:baselineAligned="false"
android:gravity="center_vertical"
android:minHeight="?attr/listPreferredItemHeight"
android:paddingRight="#dimen/preference_item_padding_side"
android:paddingLeft="?android:attr/scrollbarSize" >
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center"
android:minWidth="#dimen/preference_icon_minWidth"
android:orientation="horizontal" >
<ImageView
android:id="#+id/icon"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:minWidth="48dp"
android:contentDescription="#string/emptyString"
android:paddingRight="#dimen/preference_item_padding_inner" >
</ImageView>
</LinearLayout>
<RelativeLayout
android:layout_width="0dp"
android:layout_height="wrap_content"
android:layout_weight="1"
android:paddingBottom="6dip"
android:gravity="right"
android:layout_gravity="right"
android:paddingLeft="#dimen/preference_item_padding_inner"
android:paddingTop="6dip" >
<TextView
android:id="#+id/title"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:ellipsize="marquee"
android:fadingEdge="horizontal"
android:gravity="right"
android:singleLine="true"
android:textAppearance="?android:attr/textAppearanceMedium" >
</TextView>
<TextView
android:id="#+id/summary"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignRight="#id/title"
android:gravity="right"
android:layout_below="#id/title"
android:maxLines="10"
android:textAppearance="?android:attr/textAppearanceSmall"
android:textColor="?android:attr/textColorSecondary" >
</TextView>
</RelativeLayout>
<LinearLayout
android:id="#+id/widget_frame"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:gravity="center"
android:minWidth="#dimen/preference_widget_width"
android:orientation="vertical" >
</LinearLayout>
</LinearLayout>
In your custom Preference:
#Override
protected View onCreateView(ViewGroup parent)
{
setLayoutResource(R.layout.preference_layout);
return super.onCreateView(parent);
}

public class RtlEditTextPreference extends EditTextPreference {
public RtlEditTextPreference(Context context, AttributeSet attrs) {
super(context, attrs);
}
public RtlEditTextPreference(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
}
public RtlEditTextPreference(Context context) {
super(context);
}
#Override
protected View onCreateView(ViewGroup parent) {
View view = super.onCreateView(parent);
RelativeLayout relativeLayout = (RelativeLayout)(((LinearLayout)view).getChildAt(1));
relativeLayout.setGravity(Gravity.RIGHT);
TextView title = (TextView) relativeLayout.getChildAt(0);
TextView summary = (TextView) relativeLayout.getChildAt(1);
RelativeLayout.LayoutParams titleLayoutParams = (RelativeLayout.LayoutParams)title.getLayoutParams();
titleLayoutParams.addRule(RelativeLayout.ALIGN_PARENT_RIGHT);
title.setLayoutParams(titleLayoutParams);
RelativeLayout.LayoutParams summaryLayoutParams = (RelativeLayout.LayoutParams)summary.getLayoutParams();
summaryLayoutParams.addRule(RelativeLayout.ALIGN_RIGHT, title.getId());
summaryLayoutParams.addRule(RelativeLayout.ALIGN_LEFT, -1); // Override default left alignment to the title
summary.setLayoutParams(summaryLayoutParams);
return view;
}
}

This method worked for me:
#Override
public View onCreateView(View parent, String name, Context context, AttributeSet attrs)
{
View v = super.onCreateView(parent, name, context, attrs);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1)
{
if(parent != null)
parent.setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
if(v != null)
v.setLayoutDirection(View.LAYOUT_DIRECTION_RTL);
}
return v;
}

Arabic text has posed a problem for many a user which means that similar, if not the same, questions have been answered several times.
I'll just leave these here
Android Arabic text aligment and
How to support Arabic text in Android?

Android listview array adapter selected

i'm trying to add a contextual action mode to a listview, but i'm having some problems with the selection, if i make aList1.setSelection(position) it doesn't select anything, and if i make List1.setItemChecked(position, true) it works but it only changes the font color a little and i want it to change the background or something more notable, is there any way to detect the selection and manually and change the background, or i'm missing something?
the list:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<ListView
android:id="#+id/list1"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:choiceMode="singleChoice"
android:drawSelectorOnTop="false">
</ListView>
</RelativeLayout>
the adapter:
public class ServicesRowAdapter extends ArrayAdapter<String[]> {
private final Activity context;
private final ArrayList<String[]> names;
static class ViewHolder {
public TextView Id;
public TextView Date;
public RelativeLayout statusbar,bglayout;
}
public ServicesRowAdapter(Activity context, ArrayList<String[]> names) {
super(context, R.layout.servicesrowlayout, names);
this.context = context;
this.names = names;
}
#Override
public View getView(int position, View convertView, ViewGroup parent) {
View rowView = convertView;
if (rowView == null) {
LayoutInflater inflater = context.getLayoutInflater();
rowView = inflater.inflate(R.layout.servicesrowlayout, null);
ViewHolder viewHolder = new ViewHolder();
viewHolder.Id = (TextView) rowView.findViewById(R.id.idlabel);
viewHolder.Date = (TextView) rowView.findViewById(R.id.datelabel);
rowView.setTag(viewHolder);
}
ViewHolder holder = (ViewHolder) rowView.getTag();
holder.Date.setText(names.get(position)[2]);
holder.Id.setText(names.get(position)[1]);
return rowView;
}
}
with the use of a layout:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content" >
<TextView
android:id="#+id/idlabel"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerVertical="true"
android:gravity="right"
android:text="#+id/idlabel"
android:textSize="20dp"
android:width="70dp" >
</TextView>
<TextView
android:id="#+id/datelabel"
android:layout_centerVertical="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#+id/datelabel"
android:textSize="20dp"
android:layout_marginLeft="90dp" >
</TextView>
</RelativeLayout

This is becasue in touch mode there is no focused or selection. You're on the right track using the checked state. You just need to use a state drawable with different states.
Steps:
1) In your row_layout.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/item_selector"
>
2) Create a new xml file (match the name to the one you used in your row layout) in your drawable folder like so (note that I have a color.xml file set up so I can use #color/color, if you don't you can simply put a hex color code in there):
<?xml version="1.0" encoding="utf-8"?>
<selector xmlns:android="http://schemas.android.com/apk/res/android">
<item
android:state_activated="true"
android:drawable="#color/blue" />
</selector>
That's it. It's not reaql intuitive, but "activated" basically means "checked" when you have enabled the checked state.
With that setup (and enabling the list rows to be checkable) you will now have the background changed from whatever it is normally to blue when in the checked state. Add code to set that state in onTouch or onClick and you'll be all set. The background will stay that way until you touch another item.