Develop Reference

Android - how to trigger setOnCheckedChangeListener with linear layout?

In my recyclerview onBindView method, I have this piece of code:
holder.linearLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// execute the code inside the onCheckedChanged method
}
});
And then I also have this:
holder.checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// do something
}
});
I'm doing this because I need padding around the checkbox (linear layout), but I need the checkbox to stay the same during scrolling by using OnCheckedChangedListener. I need to use the boolean isChecked parameter to execute my further code.
How can I execute the code inside the onCheckedChanged by clicking on the linear layout and not on the checkbox?

If you need to change the checkbox field on clicking linear layout add this code
holder.checkBox.setChecked(!holder.checkBox.isChecked());
else add this
holder.checkBox.setChecked(holder.checkBox.isChecked());
This will call the onCheckedChanged method.

try this :
holder.linearLayout.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
if(holder.checkBox.isChecked()){
holder.checkBox.setChecked(false);
//do your code for check status false
}
else{
holder.checkBox.setChecked(true);
//do your code for check status true
}
}
});

How to achieve on first click listener in android?

I have a customView , i want to set onClick which will only be called on the very first click. In which i want to start a thread which will start a counter on other TextView , with simple onClickListener with each click a new threads starts which is a problem . How can i achieve such task ?

Another option is in your onClick() method do set a null listener, i.e.
#Override
public void onClick(View view) {
// disable any other clicks from now on
customView.setOnClickListener(null);
...
}

I think this is only logic problem, So I solve this problem by using a boolean variable for the first click:
boolean isFristClick = true;
#Override
public void onClick(View v) {
if (isFristClick) {
// Start your counter Thread here
isFristClick = false;
} else {
// Do nothing
}
}

What about making a workaround for that?!! like assigning a boolean value to tell if it's the first click:
private boolean first_click = true;
your_view.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if(first_click){
first_click = false;
// Do something on first click
}else{
// Do another thing on later clicks
}
}
});

Android - How to increase EditText value?

I'm new to android development..
I have this code in my main class:
Button prevBtn, pauseBtn, nextBtn;
EditText counterTxt;
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_affirmations);
SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
prevBtn = (Button)findViewById(R.id.prevBtn);
pauseBtn = (Button)findViewById(R.id.pauseBtn);
nextBtn = (Button)findViewById(R.id.nextBtn);
counterTxt = (EditText)findViewById(R.id.counterTxt);
prevBtn.setOnClickListener(new View.OnClickListener() {
int t = Integer.parseInt(counterTxt.getText().toString());
public void onClick(View v) {
counterTxt.setText(String.valueOf(t-1));
}
});
nextBtn.setOnClickListener(new View.OnClickListener() {
int t = Integer.parseInt(counterTxt.getText().toString());
public void onClick(View v) {
counterTxt.setText(String.valueOf(t+1));
}
});
}
#Override
public boolean onCreateOptionsMenu(Menu menu) {
getMenuInflater().inflate(R.menu.activity_affirmations, menu);
return true;
}
When I click "Previous", the text field value becomes 19.
When I click "Next", the text field value becomes 21.
But it only displays these two values, nothing else, no matter if i click again. I want to subtract or add 1 whenever i click the appropriate buttons.
I think this happens because the event Listeners are inside onCreate() method? Any idea on how to make it update each time I click?

You need to move your parseInt inside your onClick:
nextBtn.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
int t = Integer.parseInt(counterTxt.getText().toString());
counterTxt.setText(String.valueOf(t+1));
}
});

In both cases, t is defined as a member variable of the listener, and never changed. move it inside the onClick method instead, like this (in both cases):
public void onClick(View v) {
int t = Integer.parseInt(counterTxt.getText().toString());
counterTxt.setText(String.valueOf(t-1));
}

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 to set onclicklistener to items in current page?

I have an application where i want to add onclicklistener to my individual items in pager.
Below is my screen shot . please some one tell me how to add onclicklistener to individual image in this current page .
Thanks
below is my code for pager view.
here when 1st time run the app initialize the every view page, when i try to click on image it return only last image info. But i want the current image info.
scroller = ((Pager)findViewById(R.id.scrollView));
indicator = ((PageIndicator)findViewById(R.id.indicator));
indicator.setPager(scroller);
// Pager pager = new Pager(this, attrs)
//indicator.getActivePage();
LayoutInflater layoutInflater = (LayoutInflater) this.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View pageView = null;
for (int i = 0; i < NUM_PAGES; i++) {
pageView = layoutInflater.inflate(R.layout.page, null);
// ((TextView) pageView.findViewById(R.id.pageText)).setText("Page " + (i+1));
c=4*i;
imageView1 = (ImageView) pageView.findViewById(R.id.imageView1);
imageView1.setImageResource(icons[c]);
imageView2 = (ImageView) pageView.findViewById(R.id.imageView2);
imageView2.setImageResource(icons[c+1]);
imageView3 = (ImageView) pageView.findViewById(R.id.imageView3);
imageView3.setImageResource(icons[c+2]);
imageView4 = (ImageView) pageView.findViewById(R.id.imageView4);
imageView4.setImageResource(icons[c+3]);
// pageView.setBackgroundColor(COLORS[i % COLORS.length]);
imageView1.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("helo i clicked==>"+c);
}
});
imageView2.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("helo i clicked==>"+c);
}
});
imageView3.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("helo i clicked==>"+c);
}
});
imageView4.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
System.out.println("helo i clicked==>"+c);
}
});
scroller.addPage(pageView);
}

It seem to be you didn't read information available at android developers.
Use below code to add onClickListener for images. I don't know whether you are using ImageView or ImageButton. I took ImageView.
ImageView iv = new ImageView(/**Context you have to pass**/);
iv.setOnClickListener(new View.OnClickListener) {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
// do whatever you want
}
});
I hope it may help you.

set this on your images..or button
in the xml such that
<Button [...]
android:onClick: "onClick" [...]
/>
"onClick": name this whatever you want your method name that handles clicks to be

This can be done by assigning onClickListeners to Image Buttons. You can use Image buttons to display these images and set onClickListeners on them. Perhaps something like this can help?
ImageButton button = (ImageButton) findViewById(R.id.imageButton1);
button.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
// Do your stuff here
}
});

If you use ImageView then set the property OnClick to true.