Develop Reference

Common Header with click events of Header from all Activities in Xamarin android

I am developing a xamarin android application, where I used to call a Header activity in all Activities. My code is as Fallows
My Main.axml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/container"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<!-- Header aligned to top -->
<include layout="#layout/Header"
android:id="#+id/includeheader"
android:layout_alignParentTop="true" />
<!-- Content below header and above footer -->
<include layout="#layout/Content"
android:id="#+id/includecontent" />
<!-- Footer aligned to bottom -->
<include layout="#layout/Footer"
android:id="#+id/includefooter"
android:layout_alignParentBottom="true"/>
</RelativeLayout>
My Header.axml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TableLayout
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:minHeight="50dip">
<TableRow
android:background="#2c2c2c"
android:padding="10dip">
<TextView
android:id="#+id/scanHome"
android:layout_width="0dip"
android:layout_weight="2.5"
android:textSize="22sp"
android:textStyle="bold"
android:gravity="center"
android:text="" />
<Button
android:id="#+id/Settings"
android:layout_width="0dip"
android:layout_height="30dip"
android:layout_marginLeft="10dip"
android:layout_weight="0.17"
android:gravity="center"
android:width="35dip"
android:clickable="true"
android:onClick="SettingsClick"/>
<Button
android:id="#+id/logout"
android:layout_width="0dip"
android:layout_height="40dip"
android:layout_weight="0.27"
android:gravity="center"
android:width="40dip" />
</TableRow>
</TableLayout>
</LinearLayout>
MainActivity.class
namespace LayoutApp
{
[Activity(Label = "LayoutApp", MainLauncher = true, Icon = "#drawable/icon")]
public class MainActivity : Header
{
protected override void OnCreate(Bundle bundle)
{
base.OnCreate(bundle);
// Set our view from the "main" layout resource
SetContentView(Resource.Layout.Main);
setHeading("Scan Home");
}
}
}
Header.class
[Activity(Label = "LayoutApp", MainLauncher = false)]
public abstract class Header : Activity , View.IOnClickListener
{
private TextView HeaderText;
private Button Settings;
protected override void OnCreate(Bundle savedInstanceState)
{
base.OnCreate(savedInstanceState);
SetContentView(Resource.Layout.Header);
Settings = FindViewById<Button>(Resource.Id.Settings);
Settings.Click += delegate
{
};
}
protected void setHeading(string text)
{
if (HeaderText == null)
HeaderText = FindViewById<TextView>(Resource.Id.scanHome);
if (HeaderText != null)
HeaderText.Text = text;
}
public void SettingsClick()
{
}
}
Hence I am using Header Activity in MainActivity like in native android using include Property. When I load Main Launcher, Header is also displaying but click events are not working from the MainActivity where as text is applying from setHeading method.
When debugging , error is populating as 'java.lang.illegalistateexception: could not find a method SettingsClick(View) in the activityclass for onclick handler on view class'.
So, my issue here is I would like to get click events of Header.

The layout files (AXML) are not linked to Activities with the same names as theirs.
In your Main.axml code, you are including (adding) the layout code from Header.axml; however, your MainActivity.cs code has no relations with the Main.axml, just like the HeaderActivity.cs code has no relations with the Header.axml code.
In the MainActivity.cs code, the SetContentView(Resource.Layout.Main) applies the Main.axml layout (which contains the Header.axml code) to your MainActivity, but does not apply the methods from HeaderActivity.cs.
If you want an app with Toolbar and Bottom Bar in your app, there is a good tutorial here: http://mateoj.com/2015/06/21/adding-toolbar-and-navigation-drawer-all-activities-android/
You should also take a look on Android Fragments.

#kumar Sudheer, I don't know the xamarin development, but I can understand what you want to do by looking at the code and exception you get.
Just pass the View object as parameter in the SettingClick method of your header activity
public void SettingsClick(View v)
{
}
In android when you define the click handler in layout file then the signature of that method would be public void <clickHandler>(View v) {}.
You've not passed the View parameter in the method that's why system is unable to find your method in Activity and that's why you are getting the java.lang.IllegaliStateException

custom title android onClick , wrong id called

I have implemented a custom title to my activity :
<?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="fill_parent"
android:background="#3a5894" >
<LinearLayout
android:layout_width="50dp"
android:layout_height="100dp"
android:layout_alignParentLeft="true"
android:layout_alignParentTop="true"
android:orientation="vertical"
android:id="#+id/left_button_title_bar_main_content_fragment"
android:background="#90C3D4"
android:onClick="onClickTitleBar">
<ImageView android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#90C3D4"/>
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:orientation="vertical"
android:id="#+id/center_textview_title_bar"
android:onClick="onClickTitleBar">
<TextView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:paddingTop="15dp"
android:text="Quick Notes"
android:textColor="#ffffff"/>
</LinearLayout>
</RelativeLayout>
My activity implementation :
public class MainActivity extends Activity implements OnClickListener {
private LinearLayout leftButtonInTitle;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
// custom title
requestWindowFeature(Window.FEATURE_CUSTOM_TITLE);
// full screen activity
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.activity_main);
// custom title bar
getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title_bar);
leftButtonInTitle = (LinearLayout) findViewById(R.id.left_button_title_bar_main_content_fragment);
and the method where I would like to handle click
public void onClickTitleBar(View v) {
int id = v.getId();
Log.e("","id : "+id);
Log.e("","button id: " + R.id.left_button_title_bar_main_content_fragment);
}
and I have logged out the v.getId and the linearlayout actual id.
And I have realized the ids are not the same.
here is the log :
E/﹕ id 2131493001
E/﹕ button id: 2131493000
As you can see the numbers are not the same.
Any idea why this is happening ?
Any help is appreciated.

You have set the onClick on the LinearLayout with the ID R.id.center_textview_title_bar as well. Because it is in a RelativeLayout, and no constraints are set, and it is "higher up" in the order of the children, it will be displayed on top of the LinearLayout with the ID R.id.left_button_title_bar_main_content_fragment and it will pick up all clicks in place of the title bar.
To fix this, remove the line
android:onClick="onClickTitleBar"
From the LinearLayout with the ID R.id.center_textview_title_bar

In your xml file, value of onClick attribute of both LinearLayout is same.
May be you are getting different IDs because of that.
Try giving different values of onClick for both LinearLayouts.

How to attach OnClickListener to a button in a custom preference layout?

I have a preference screen that is populated with items from a database. I have this working by creating my own PreferenceActivity. In the activity I create DialogPreference items and add them to my PreferenceCategory To style to preference item on the screen I use a custom layout and apply it using setLayoutResource(R.layout.custom_pref_row)
This basically adds an ImageButton to the view aligned to the right of the layout. This all works fine and my preference screen shows the custom view with the button. My question is how do I attach a click listener to the button in the custom view? I was not able to find a way to get at View for the row from the PreferenceActivity. If my items were not created dynamically I might be able to do this all from XML and then reference the id or the button, but I can do that because I am creating the list dynamically.
Any suggestions on how to get a handle on the ImageButton for each item? In the end I want to configure the button to launch a delete confirmation dialog.
R.layout.custom_pref_row:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_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="wrap_content"
android:layout_height="wrap_content"
android:singleLine="true"
android:textAppearance="?android:attr/textAppearanceLarge"
android:ellipsize="marquee"
android:fadingEdge="horizontal" />
<TextView android:id="#+android:id/summary"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="#android:id/title"
android:layout_alignLeft="#android:id/title"
android:textAppearance="?android:attr/textAppearanceSmall"
android:maxLines="2" />
<ImageButton android:id="#+id/pref_delete_station" android:layout_width="wrap_content" android:layout_height="wrap_content" android:src="#drawable/ic_trash_can" android:layout_alignParentRight="true" android:background="#null"></ImageButton>
</RelativeLayout>
<!-- Preference should place its actual preference widget here. -->
<LinearLayout android:id="#+android:id/widget_frame"
android:layout_width="wrap_content"
android:layout_height="fill_parent"
android:gravity="center_vertical"
android:orientation="vertical" />
</LinearLayout>
Related part of my PreferenceActivity:
DialogPreference diaPref;
for (Station mStation : sList) {
diaPref = new StationEditor(this.getPreferenceScreen().getContext(), null, this, mStation);
diaPref.setLayoutResource(R.layout.custom_pref_row);
diaPref.setTitle(mStation.getName());
diaPref.setKey(STATION_PREFIX + mStation.getId());
// add new preference
stationTypesCategory.addPreference(diaPref);
}

You can extend DialogPreference and override the onBindDialogView(View view). Inside this method you can do:
#Override
protected void onBindDialogView(View view) {
((ImageButton) view.findViewById(R.id.pref_delete_station)).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
}
});
super.onBindDialogView(view);
}
Your sublcass of DialogPreference can hold any state/value related to the item it represents.
Take a look at this question about general guidelines to extend DialogPreference.
Hope this helps!

OK, Chopin got me thinking in a different direction. I did not realize that the Preference object is also responsible for how its selector appears in a Preference screen.
The setLayoutResouce() function sets the resource for the Dialog itself not the row seen in a Preference screen. This was confusing and I was incorrectly trying to use this in the preference screen to adjust the selector layout there.
The solution is to override onCreateView and return a custom layout there. To me this is counterintuitive because that method usually controls the final view in most other situations.
I alraedy subclassed my Preference (DialogPreference) so all I had to do was add the following...
#Override
protected View onCreateView (ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) getContext().getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View customRow = inflater.inflate(R.layout.preferences_station_list_row, null);
((ImageButton) customRow.findViewById(R.id.pref_delete_station)).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Log.i("c","clicked");
}
});
customRow.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
showDialog(null);
}
});
customRow.setClickable(true);
return customRow;
}
One problem I ran into was that at first the row itself was no longer clickable but the button was. I had to add a listener on the whole view and manually call ShowDialog(). The only thing missing now is that when clicked from the Preference screen the item no longer shows a highlight. Any idea what styles I should apply so the list shows the highlight like it normally does?

Communication between custom SurfaceView and default android's views

My problem is communication between custom GameView (extends SurfaceView) and TextView: I want to set TextView's text from inside of the GameView.
In main activity i'm using this layout file, it should explain structure of my app:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<RelativeLayout
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:background="#00ff00"
>
<TextView
android:id="#+id/scoreTV"
android:layout_alignParentLeft="true"
android:layout_centerVertical="true"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="score: 0"
/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="back"
android:layout_alignParentRight="true" />
</RelativeLayout>
<org.gk.grApp.GameView
android:id="#+id/gameplayScreen"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
/>
</LinearLayout>
I can't change TextView's text in my GameView object, because it's impossible to touch UI thread from another.
Handler doesn't work too, because i can't give a handler's reference to GameView's constructor, that is performed after loading this xml file (a read about default constructor for xml files eg here How can I use GLSurfaceView in a LinearLayout together with other Views, such as TextView or Button?).
Do you have any idea what I should do now? Maybe my deduction is wrong, so please, tell me about this.
EDIT: I changed my xml file, instead of GameView I have now:
<LinearLayout
android:id="#+id/gameplayScreen"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
</LinearLayout>
Also I added an argument (third) into constructor's signature:
public GameView(Context context, AttributeSet as, Handler h) { ... }
and changed my onCreate in GameplayActivity:
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.gameplay);
LinearLayout ll = (LinearLayout)findViewById(R.id.gameplayScreen);
GV = new GameView(this, null, scoreHandler);
ll.addView(GV);
}
It works, now I can set TextView's text but after clicking on the back button another exception is thrown:
"Performing pause of activity that is not resumed: {org.gk.grApp/org.gk.grApp.MainMenuActivity}". I just started searching information about this.

First make a reference to the TextView on the activity level:
TextView txv;
In onCreate assign this reference:
txv = (TextView) findViewById(R.id.MyTextView);
Then make a method in your Activity after onCreate like this:
public void setTextView(final String txt){
MyActivity.this.runOnUiThread(new Runnable() {
public void run() {
txv.setText(txt);
}
});
}
Then you make a call from your custom view:
((MyActivity) getContext()).setTextView(str);

How to add a footer in ListView?

I am developing an application,In my application,I am using Listview for displaying data using dom parsing,I want to footer in listview,when i click footer additional more data add to list view,I attached image,i would like that design and process,please refer image1 and imgae2.I mention footer in red rectangle
Fig1-Footer like "More News"
Fig2-Add additional 10 record added in listview

Create a footer view layout consisting of text that you want to set as footer and then try
View footerView = ((LayoutInflater) ActivityContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.footer_layout, null, false);
ListView.addFooterView(footerView);
Layout for footer could be something like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:paddingTop="7dip"
android:paddingBottom="7dip"
android:orientation="horizontal"
android:gravity="center">
<LinearLayout
android:id="#+id/footer_layout"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:gravity="center"
android:layout_gravity="center">
<TextView
android:text="#string/footer_text_1"
android:id="#+id/footer_1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="14dip"
android:textStyle="bold"
android:layout_marginRight="5dip" />
</LinearLayout>
</LinearLayout>
The activity class could be:
public class MyListActivty extends ListActivity {
private Context context = null;
private ListView list = null;
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
list = (ListView)findViewById(android.R.id.list);
//code to set adapter to populate list
View footerView = ((LayoutInflater)context.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.footer_layout, null, false);
list.addFooterView(footerView);
}
}

Answers here are a bit outdated. Though the code remains the same there are some changes in the behavior.
public class MyListActivity extends ListActivity {
#Override
public void onCreate(Bundle savedInstanceState) {
TextView footerView = (TextView) ((LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE)).inflate(R.layout.footer_view, null, false);
getListView().addFooterView(footerView);
setListAdapter(new ArrayAdapter<String>(this, getResources().getStringArray(R.array.news)));
}
}
Info about addFooterView() method
Add a fixed view to appear at the bottom of the list. If addFooterView() is called more than once, the views will appear in the order they were added. Views added using this call can take focus if they want.
Most of the answers above stress very important point -
addFooterView() must be called before calling setAdapter().This is so ListView can wrap the supplied cursor with one that will also account for header and footer views.
From Kitkat this has changed.
Note: When first introduced, this method could only be called before setting the adapter with setAdapter(ListAdapter). Starting with KITKAT, this method may be called at any time. If the ListView's adapter does not extend HeaderViewListAdapter, it will be wrapped with a supporting instance of WrapperListAdapter.
Documentation

I know this is a very old question, but I googled my way here and found the answer provided not 100% satisfying, because as gcl1 mentioned - this way the footer is not really a footer to the screen - it's just an "add-on" to the list.
Bottom line - for others who may google their way here - I found the following suggestion here: Fixed and always visible footer below ListFragment
Try doing as follows, where the emphasis is on the button (or any footer element) listed first in the XML - and then the list is added as "layout_above":
<RelativeLayout>
<Button android:id="#+id/footer" android:layout_alignParentBottom="true"/>
<ListView android:id="#android:id/list" **android:layout_above**="#id/footer"> <!-- the list -->
</RelativeLayout>

If the ListView is a child of the ListActivity:
getListView().addFooterView(
getLayoutInflater().inflate(R.layout.footer_view, null)
);
(inside onCreate())

The activity in which you want to add listview footer and i have also generate an event on listview footer click.
public class MainActivity extends Activity
{
#Override
protected void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
ListView list_of_f = (ListView) findViewById(R.id.list_of_f);
LayoutInflater inflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View view = inflater.inflate(R.layout.web_view, null); // i have open a webview on the listview footer
RelativeLayout layoutFooter = (RelativeLayout) view.findViewById(R.id.layoutFooter);
list_of_f.addFooterView(view);
}
}
activity_main.xml
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#drawable/bg" >
<ImageView
android:id="#+id/dept_nav"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#drawable/dept_nav" />
<ListView
android:id="#+id/list_of_f"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/dept_nav"
android:layout_margin="5dp"
android:layout_marginTop="10dp"
android:divider="#null"
android:dividerHeight="0dp"
android:listSelector="#android:color/transparent" >
</ListView>
</RelativeLayout>

In this Question, best answer not work for me. After that i found this method to show listview footer,
LayoutInflater inflater = getLayoutInflater();
ViewGroup footerView = (ViewGroup)inflater.inflate(R.layout.footer_layout,listView,false);
listView.addFooterView(footerView, null, false);
And create new layout call footer_layout
<?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="match_parent">
<TextView
android:id="#+id/tv"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Done"
android:textStyle="italic"
android:background="#d6cf55"
android:padding="10dp"/>
</LinearLayout>
If not work refer this article hear

you can use a stackLayout, inside of this layout you can put a list a frame, for example:
<StackLayout VerticalOptions="FillAndExpand">
<ListView ItemsSource="{Binding YourList}"
CachingStrategy="RecycleElement"
HasUnevenRows="True">
<ListView.ItemTemplate>
<DataTemplate>
<ViewCell >
<StackLayout Orientation="Horizontal">
<Label Text="{Binding Image, Mode=TwoWay}" />
</StackLayout>
</ViewCell>
</DataTemplate>
</ListView.ItemTemplate>
</ListView>
<Frame BackgroundColor="AliceBlue" HorizontalOptions="FillAndExpand">
<Button Text="More"></Button>
</Frame>
</StackLayout>
this is the result:

// adding a footer to list as Log Out
val view: View =
(getSystemService(Context.LAYOUT_INFLATER_SERVICE) as LayoutInflater).inflate(
R.layout.logout_menu, null, false
)
// footer onClick
view.setOnClickListener {
doLogout()
binding.drawerLayout.close()
}
expandableListView.addFooterView(view)