Develop Reference

Android change TextView color of Spinner

I've been trying to change the Spinner TextView color. I need to do it programmatically. I have my personal Adapter and resource view. (I don't want to change the pop up sipnner text color, only the text that is shown on the users layout when somenthig is selected)
This is my code:
PersonalArrayAdapter spAdapterInfraccion = new PersonalArrayAdapter(getContext(),
R.layout.item_spinner,
infraccionList);
spinner.setAdapter(spAdapter);
item_spinner.xml:
<?xml version="1.0" encoding="utf-8"?>
<co.my.app.utils.CustomTextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/text1"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceListItemSmall"
android:gravity="center_vertical"
android:paddingStart="?android:attr/listPreferredItemPaddingStart"
android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
android:minHeight="?android:attr/listPreferredItemHeightSmall" />
This is how I've try it, but returns null.
CustomTextView text = (CustomTextView)view.findViewById(R.id.text1);
text.setTextColor(getContext().getColor( R.color.black ));

You may try this :-
public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
int index = adapterView.getSelectedItemPosition();
((TextView) spinner.getSelectedView()).setTextColor(getResources().getColor(R.color.Blue));
Hope it may help you. :)

check multiple items in list view

I use an adapter to load a list view from a content provider. Each item in the list uses the below 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="wrap_content">
<LinearLayout
android:id ="#+id/wrapper"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<CheckedTextView
android:id="#+id/txt_chat"
android:layout_height="wrap_content"
android:layout_width="wrap_content"
android:layout_gravity="center"
android:checkMark="?android:attr/listChoiceIndicatorMultiple"
/>
</LinearLayout>
</LinearLayout>
I have set the list item to allow multiple choice mode :
onCreate(){
...
lv_chatMessages = (ListView) findViewById(R.id.listview_chat);
lv_chatMessages.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
lv_chatMessages.setItemsCanFocus(false);
...
}
But at run time, i am not able to check any of the items in the list view. If i touch the box, the item just gets highlighted momentarily, but no check mark appears.
I can set a default for all the items if i add an attribute to the CheckedTextView :
android:checked="true"
How do i let the user change the check status of each item at runtime?

refer this link...
CheckedTextView
this may help you..
[Edit by Faizal] :
Using the toggle() inside the onItemClickListener did the trick :
lv_chatMessages.setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3){
CheckedTextView ctv = (CheckedTextView) (((ViewGroup) arg1).findViewById(R.id.txt_chat));
ctv.toggle();
}
});

can you add this into list items
android:descendantFocusability="blocksDescendants"
android:focusableInTouchMode="false"

Since, you are using a custom adapter, you'll have to maintain the status of the checkbox in the getView() method of the custom adapter.
What you could probably do is to add another Boolean field to your ArrayList of Objects which you use to populate the adapter and check that value in the getView() method. to Something like :
if(status) {
checkBox.setChecked(true);
}
Also, update the status variable using OnCheckedChangeListener().
This method will let you toggle status and also ensure that the checkbox status is maintained even when a list item goes out of the view.
Edit 1 : When not using a custom adapter. This is how I did it.
ListView rendererList;
ArrayList<String> friendlyNames;
friendlyNames = new ArrayList<String>();
rendererList = (ListView) dialog.findViewById(R.id.rendererList);
ArrayAdapter rendererSelectionAdapter = new ArrayAdapter<String>(activity,R.layout.custom_list_layout, friendlyNames);
rendererList.setAdapter(rendererSelectionAdapter);
rendererList.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE);
custom_list_layout was the same layout which android provides, however, I had to make slight modifications so I copied the default file and edited.
here is the custom_list_layout :
<CheckedTextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#android:id/text1"
android:layout_width="match_parent"
android:layout_height="?android:attr/listPreferredItemHeightSmall"
android:background="#color/white"
android:checkMark="?android:attr/listChoiceIndicatorSingle"
android:gravity="center_vertical"
android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"
android:paddingStart="?android:attr/listPreferredItemPaddingStart"
android:textSize="#dimen/dialog_box_button_textsize" />

Problems with click listener for header in a ListView

So, I have a header view defined as follows:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="10dp"
android:paddingTop="5dp"
android:paddingBottom="5dp">
<TextView android:id="#+id/purchase_menu_header_text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textColor="#000000"
android:textSize="20sp"
android:text="#string/purchase_options_label"/>
</LinearLayout>
Inflated as follows:
View header = ((Activity) context).getLayoutInflater().inflate(R.layout.purchase_menu_header, options, false);
options.addHeaderView(header);
I have an click listener for items in the options ListView:
options.setOnItemClickListener(new AdapterView.OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
Offer offer = (Offer) options.getItemAtPosition(position);
initiatePurchase(offer.getStoreProduct());
}
});
And a click listener for the header view itself:
header.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View view)
{
baseLayout.removeView(background);
baseLayout.removeView(overlay);
}
});
My problem is that the header only registers clicks on the text portion of the header. The desired behaviour is to have the entire header clickable. I have tried solutions such as using setOnItemClickListener with a getItemAtPosition(0), but this returns null. Have also tried to expand the text view in the header with MATCH_PARENT, but no luck there.

Try making your LinearLayout clickable using the android:clickable attribute.

My problem is that the header only registers clicks on the text
portion of the header.
Cause your header is just the TextView with wrap_content as width and height. Hence you are applying clicklistener to TextView with restricted clickable area.
Solution:
use match_parent as width for TextView. Or
use the LinearLayout that contains the TextView in it, as the header and make that clikable.
Hope it helps you.

How to remove the separator line in the spinner?

How to remove the separator line in the spinner?
For example, how can I remove/control these white separator lines?
P.S. This is the row layout:
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/black">
<TextView
android:id="#+id/catalog_spinner_item_textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:padding="11dp"
android:text="#string/CatalogSpinnerItemRowDefaultText"
android:textSize="18sp"
android:gravity="center_vertical"/>
</LinearLayout>

public View getView(int position, View row, ViewGroup container) {
row=(View) inflater.inflate(R.layout.row_layout_spinner_filter, null);
TextView tv=(TextView) row.findViewById(R.id.textview_spinner_filter_item_name);
if(container!=null&&(container instanceof ListView)){
ListView lv=null;
try{
lv=(ListView)container;
}catch(Exception e){}
if(lv!=null){
lv.setDivider(drawable);
lv.setDividerHeight(height);
}
}
tv.setText(getItem(position));
return row;
}
ViewGroup container comes as ListView or Spinner, so you can catch listview and edit divider.

use in Spinner's xml
android:backgorund="#null"

Define a style as mentioned by Kunal, then refer to that style in your spinner as android:style = " "
or you can use android:divider and android:dividerHeight in your spinner to control its attributes/ remove them.
Or you can set the divider to android:color/transparent as well.

Android ListView select items to delete with 3 column layout

I'd like to implement a Listview in android in which I have the possibility to enable a delete mode, in which the user can select the entries to delete. It should be similar to the message application in android.
I already have a ListActivity which has an icon on the left and text on the right side. I now like to add a CheckBox floating on the right side of the list entry. The ListActivity is listed in another question by a friend of mine: android listactivity background color .
The layout should be:
Left Picture
Center List item
Right Checkbox for delete selection
How can I achieve this? Is there a standard ListView item in the framework I could use?

I guess you want a CheckBox to appear(only) when is time to delete items from the ListView. Assuming you use the layout from the other question:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="horizontal"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:padding="5dp"
android:background="#color/darkbluelogo" >
<ImageView android:id="#+id/list_image"
android:layout_width="48dip"
android:layout_height="48dip"
android:contentDescription="#id/list_image"
/>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="0dp"
android:layout_weight="1"
android:layout_height="fill_parent"
android:padding="5dp"
android:background="#color/darkbluelogo"
android:scrollingCache="false"
android:cacheColorHint="#00000000" >
<TextView
android:id="#+id/title"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#+id/title" >
</TextView>
<TextView
android:id="#+id/datetime"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="#+id/datetime" >
</TextView>
</LinearLayout>
<CheckBox
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:visibility="gone" />
</LinearLayout>
When the ListView starts the CheckBox will not be present and the content TextViews will occupy all the space. Add a flag in the getView method of your adapter that will signal that the CheckBox must be shown(here you will set the CheckBox's visibility from the layout to visible). When its time to delete items modify the flag and then call notifyDataSetChanged() so the ListView redraws its children, this time with the CheckBox present.
Note:
You'll have to store the status of the CheckBoxes yourself.

First of all you need a custom layout for your list entries. A simple RelativeLayout including an ImageView , a TextView and a CheckBox should be enough.
Then you might want to build your own custom adapter which can extend BaseAdapter (or SimpleAdapter or CursorAdapter or ArrayAdapter or...). The adapter will bind the list's data to your custom layout. If for example your data is contained in a Cursor it will look like:
private class MyCustomAdapter extends CursorAdapter {
public MyCustomAdapter(Context context) {
super(context, null);
}
#Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
//Return a list item view
return getLayoutInflater().inflate(R.layout.my_custom_list_item_layout, parent, false);
}
#Override
public void bindView(View view, Context context, Cursor cursor) {
//Get views from layout
final ImageView imageView = (ImageView) view.findViewById(R.id.list_item_image);
final TextView textView = (TextView) view.findViewById(R.id.list_item_text);
final CheckBox checkBox = (CheckBox) view.findViewById(R.id.list_item_checkbox);
//Get data from cursor
final String text = cursor.getString(...);
//Add listener to the checkbox
checkBox.setOnClickListener(new OnClickListener() {...});
//Bind data
textView.setText(text);
}
}