Develop Reference

Long-press on item message to change layout

Long press
When I long-click on an item of the message, the item will display and the layout changes like the picture. I want to make this , but i don't have a keyword to find this solution. I need a keyword or some example to make it.

Many ways you can do. I am going to share one example.
Implement View.OnLongClickListener as follows
private void setupLongPress() {
imageButton.setOnLongClickListener(new View.OnLongClickListener(){
#Override
public boolean onLongClick(View v){
// here your staff
// we added dialog method here as follows
createPreviewDialog();
return false;
}
});
}
Now use LayoutInflater to inflate new layout as a popup windows
private Dialog createPreviewDialog() {
View view = LayoutInflater.from(getContext()).inflate(R.layout.dialog_preview, null);
LinearLayout closeButton = view.findViewById(R.id.close);
closeButton.setOnClickListener (new View.OnClickListener (){
#Override
public void onClick ( View view ) {
dismiss();
}
});
View okButton = view.findViewById(R.id.ok);
loginButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
dismiss();
// here your staff
}
});
builder.setView(view);
return builder.create();
}

How to get Click Event of futuresimple library's FloatActionButton?

I am using this library this library.I used the code described in its description on github. looks like this I have event for the menu buttons, not its main Button. i want to get its main button's click event for make rest layout blur when its clicked/expended. even want to hide or set its default state when user click or touch somewhere else on screen.
FloatingActionButton actionC = new FloatingActionButton(getBaseContext());
actionC.setIcon(R.drawable.notes);
actionC.setTitle("Add note");
actionC.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//
}
});
FloatingActionsMenu floatingActionsMenu = (FloatingActionsMenu)findViewById(R.id.multiple_actions);
floatingActionsMenu.addButton(actionC);
// ((FloatingActionsMenu) findViewById(R.id.multiple_actions)).addButton(actionC);
final FloatingActionButton actionA = (FloatingActionButton) findViewById(R.id.action_a);
actionA.setIcon(R.drawable.event);
actionA.setTitle("Make life Event");
actionA.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//
}
});

and the answer is .
floatingActionsMenu.setOnFloatingActionsMenuUpdateListener(new FloatingActionsMenu.OnFloatingActionsMenuUpdateListener() {
#Override
public void onMenuExpanded() {
Toast.makeText(Launcher.this, "Fdf", Toast.LENGTH_LONG).show();
}
#Override
public void onMenuCollapsed() {
}
});

OnClickListener of ImageView is not Working

image123(ImageView) works normal but when it comes to ONclickListener it does not work even after using different methods of Calling the listener.
I put func(),which contain findviewbyid of image123 (ImageView) just after SetContentView() and it works fine .OnclickListener of image123 does not works when func() is in OnClicklistener of Reset Button as Shown in the Code.
Problem:
How can i call the func() in reset button onclicklistener as well as in start at Oncreate() Activity?
It catch an exception shown in Log cat
- Exception at Onclick Listener" ,"java.lang.NullPointerException
public class MainActivity extends Activity {
ImageView image123;
int[] resultid=new int[25];
Button buttonExit;
Button buttonreset;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
buttonreset=(Button) findViewById(R.id.button_reset);
buttonExit=(Button) findViewById(R.id.button_exit);
v1=(TextView)findViewById(R.id.name);
v2=(TextView)findViewById(R.id.fruit_count);
//--------------------------Exit Button---------------------------
buttonExit.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
finish();
}
});
//*******************Exception comes here*********************
try{
image123.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Log.d("Listner Called", "Listner Called");
}
});
}
catch(Exception e)
{
Log.d("Exception at onclickListener", e.toString());
}
buttonreset.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
func();
}});
}
void func()
{
String as=null;
int resultid;
SecureRandom random=new SecureRandom();
image123=new ImageView(this);
as=("img"+1).toString();
resultid=getResources().getIdentifier(as, "id","com.example.selectiongame" );
Log.d(as, ""+resultid);
image123=(ImageView) findViewById(resultid);
as="drawable"+(random.nextInt(3)+1);
resultid = getResources().getIdentifier(as, "drawable", "com.example.selectiongame");
Log.d(as, ""+resultid);
image123.setImageResource(resultid);
}

Try creating an array of ResIDs and an array of ImageViews. Then do something like this instead of initializing them with findViewById()...
for(int i = 0; i < res_arr.length; i++)
{
images[i] = new ImageView(this);
images[i].setImageResource(res_arr[i]);
images[i].setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
Log.d("Button_Clicked", "Button Clicked");
}
});
}

You must not findviewbyid() of an ImageView in some other function other than Oncreate(Bundle b) or Some Listener(e.g OnclickListener ,onselectionchange etc) . if you want to findviewbyid(...) of a view in a function other than Oncreate ,Atleast Call that function once after SetContentView() and other prerequisite Findviewbyid(...).
2.
In order to Refresh your Activity ,when you can not use function containing findviewbyid(...) of ImageView,like in my case, in body some button(e.g Refresh ,Reset) OnclickListner .You must write the following code
buttonreset.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
Bundle newBundle=new Bundle();
onCreate(newBundle);
//func(); >>We can not use this func() here if we are using it in Oncreate(...) in case of Array of ImageView
}});
}
For views other than Imageview ,Maybe Regular Line of Code work ...But in case of ImageView or Array of ImageView ....These things must be kept in mind and Simply Oncreate() must be used to Refresh.

how to make a click event on a textview of child of a custom listview in android

Basically I'm new to Android and don't know much about it. I'm making a quiz program in which I'm using custom ListView with 5 custom TextViews, one for question and other 4 for options. My problem is that I want the TextView as clickable as well as the LisView as choice mode as single. That is if I click one text all other TextViews should become unclickable. My problem is whenever I click on a TextView in the child layout, only the outer layout, that is the item of the ListView get selected.
here is the screenshot of the my listview
https://picasaweb.google.com/108429569548433380582/Android?authkey=Gv1sRgCJ3kxJz7tLvaTg#5783846428648608706

You can do it in two ways:
1. Either by directly using onClickListener like this:
textView.setOnClickListener(new View.OnClickListener(
public void onClick(View arg0) {
// Do anything here.
}
});
OR
2. In XML file, in declaration of <TextView /> add one more attribute as:
android:onClick="onClickTextView"
and in yout activity, add this function:
public void onClickTextView(View view) {
// Do anything here.
}
UPDATE:
Use following code to get click event on TextView:
// Click event for single list row
getListView().setOnItemClickListener(new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,
long arg3) {
TextView tv = (TextView) (findViewById(R.id.title));
if (tv != null) {
tv.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "CLICKED",
Toast.LENGTH_LONG).show();
}
});
} else {
Toast.makeText(MainActivity.this, "TV not found",
Toast.LENGTH_LONG).show();
}
}
});

Try this :
When you select one textview the other three will be unclickable
final TextView texta = (TextView) findViewById(R.id.text_a);
final TextView textb = (TextView) findViewById(R.id.text_b);
final TextView textc = (TextView) findViewById(R.id.text_c);
final TextView textd = (TextView) findViewById(R.id.text_d);
texta.setOnClickListener(new OnClickListener()
{
public void onClick(View v) {
textb.setClickable(false);
textc.setClickable(false);
textd.setClickable(false);
}
});
textb.setOnClickListener(new OnClickListener()
{
public void onClick(View v) {
texta.setClickable(false);
textc.setClickable(false);
textd.setClickable(false);
}
});
textc.setOnClickListener(new OnClickListener()
{
public void onClick(View v) {
texta.setClickable(false);
textb.setClickable(false);
textd.setClickable(false);
}
});
textd.setOnClickListener(new OnClickListener()
{
public void onClick(View v) {
texta.setClickable(false);
textb.setClickable(false);
textc.setClickable(false);
}
});

Assume you extend BaseAdapter to set the listview content ->
Open a TextView listener and settag of the current holder position , and perform your operation in the onclick method.

It's the default behavior of a ListView. Only one could be clickable: either the list row or the items inside the row.
Eg: if the row item is a textView(as in your case) the list row will be clickable but if the row item is a button then the the list row will not be clickable. Same is the case if you make TextView as clickable.
For your requirement the better approach would be to use RadioGroup (instead of multiple text view and disabling and enabling them).
You should use a custom layout for you list item with a TextView for question and a RadioGroup for options.
Layout could be something like this :
Follow these links for reference:
for listView
for RadioGroup
I hope this will help

Thanks for Shrikant and adam for there help Sorry and i appologize for a very late response.
either use this in adapter class as by Shrikant:
textViewa.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Do anything here.
}
});
textViewb.setOnClickListener(new View.OnClickListener() {
public void onClick(View arg0) {
// Do anything here.
}
});
//and so on...
// or better to use ViewHolder holder; for these type of listviews;
View.OnClickListener clickListener = new View.OnClickListener() {
#Override
public void onClick(View view) {
// Do what you want to do.
// for my i have to call a method in my parent activity. so in constructor of adapter, I passed the activity and then typecasted it like
ParentActivity parent = (ParentActivity) activity;
parent.chosenAnswer(view.getId());
// then in chosenAnswer(int id) in parentActivity use a switch case for the same logic as in Adam's answer.
// OR
//you can write like this too..
switch (view.getId()) {
case R.id.textViewa:
break;
case R.id.textViewb:
break;
case R.id.textViewc:
break;
case R.id.textViewd:
break;
}
}
};

How can I fire Onclick event programmatically?

I have a custom view with 2 linear layouts: the first is the view's header and the second is the the details view.
In the custom view, the OnClickListener of the header Linearlayout is already defined: when it fires, it collapses/expandes the second linearlayout.
What I want to do is to add more functionalities to my header's OnClickListener event (i.e.: collapse/expand the second layout and show a Toast).
I can't modify the source code of the custom view. I tried to set a new OnClickListener but it hides the initial event (collapse/expand).
How should I implement this?
The source code of My Custom View:
public class ExpandoLayout extends ViewGroup
{
/* some declarations */
private Linearlayout header;
private linearlayout footer;
/* some code */
#override
protected void onFinishInflate() {
header= new LinearLayout(context);
header.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
toggleExpand();
}
});
}
}
What I want to do is to add some code to the already defined OnClickListener event in my activity.
Something like that:
public class myActivity extends Activity {
private Linearlayout myCustomView;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.rsdetail);
myCustomView= (MyCustomView) findViewById(R.id.expanded);
myCustomView.getChildAt(0).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(v instanceof LinearLayout)
{
v.performClick();
Toast.makeText(getActivity(), "ExpandoOnClickListener", 2000).show();
}
}
});
}

You can programmatically raise click event on a View to call it's OnClickListener as below:
view.performClick();
Now if you call this on your second layout under first layout's OnClickListener then i hope it should do the magic

Simple solution would be to get original OnClickListener and then fire it in new one:
final OnClickListener preDefinedListener = myCustomView.getChildAt(0).getOnClickListner();
myCustomView.getChildAt(0).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(v instanceof LinearLayout)
{
preDefinedListener.onClick(v); // calls default (defined by MyCustomView)
Toast.makeText(getActivity(), "ExpandoOnClickListener", 2000).show();
}
}
});
Sadly, View does not have getOnClickListner(), but I guess you can use reflection to get it. It is stored in the field mOnClickListener (source).
This is how you can get OnClickListener defined for your layout:
OnClickListener tmpOnClickListener = null;
try {
Class<View> cls = (Class<View>) Class.forName("android.view.View");
Field fld = cls.getDeclaredField("mOnClickListener");
fld.setAccessible(true); // because it is protected
tmpOnClickListener = (OnClickListener) fld.get(myCustomView.getChildAt(0));
fld.setAccessible(false); // restore it's original property
} catch (SecurityException e) {
e.printStackTrace();
} catch (NoSuchFieldException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (ClassNotFoundException e) {
e.printStackTrace();
}
final OnClickListener preDefinedListener = tmpOnClickListener;
if (preDefinedListener != null) {
myCustomView.getChildAt(0).setOnClickListener(new OnClickListener() {
#Override
public void onClick(View paramView) {
preDefinedListener.onClick(paramView);
Toast.makeText(getActivity(), "ExpandoOnClickListener", Toast.LENGTH_LONG).show();
}
});
I didn't really bother to handle all exception correctly, but it's enough to get the idea.
It might look messy, but it's actually just 5 lines of new code to solve your problem.

Since SDK 15 you can just call method:
view.callOnClick()

If you cannot modify the code of CustomView then you have the below option.
Extend the CustomView.
Override the onClick() method and bind this as a Listener to the first layout.
Inside onClick() first call super.onClick() then add your additional functionality below.
This way you are keeping the existing code and adding additional functionality as well.