I have a simple CountDownTimer that displays its content in a textView. I am trying to accomplish the following:
during count down, the view is not clickable: textview.setClickable(false);
after count down finish, if the user clicks the textview, the count down should restart.
So I try a combination of
#Override
public void onFinish() {//inside CountDownTimer
view.setClickable(true);
}
and
textview.setOnClickListener(countAgain);
OnClickListener countAgain = new OnClickListener() {//inside activity
#Override
public void onClick(View v) {
// counter.cancel();
counter.start();
}
};
But this is not doing it. Any ideas?
Set onclick listener for that text view, make it clickable .
In onclicklistner, make textview as non-clickable( yourTextView.setclickable(false) ).
change the text view values as you want and every time check the value against 0. When it becomes zero, make the text view clickable( yourTextView.setclickable(true) ).
Related
I have a Recyclerview where there is a button onclicklistener in the viewholder constructor:
public ViewHolder(View itemView)
{
super(itemView);
...
button.setOnClickListener(new View.OnClickListener()
{
#Override
public void onClick(View v)
{
...
}
}
}
Each item also has a countdown, every second the countdown is decremented and a progressbar of the item is updated to display the time left.
The timer is done with a runnable:
countdownHandler.postDelayed(countdownRunnable, 1000);
which then iterates through all the items, decrements the countdown and notifies the adapter:
countdownRunnable = new Runnable()
{
#Override
public void run()
{
Iterator<Item> iterator = countdownTasks.iterator();
while (iterator.hasNext())
{
item.decrementCountdown();
adapter.notifyItemChanged(items.indexOf(item));
}
if (countdownTasks.size() > 0)
countdownHandler.postDelayed(countdownRunnable, 1000);
}
}
Here is my problem, it also occurs if there is only one item in the list.
I press the button and is in the pressed state, but when the countdown update triggers, the button is no longer pressed. Releasing the button doesn't activate the button as it should. If I remove the countdown, it works properly.
I don't change the button in onBindViewHolder and I am not scrolling since there is only one item. Is this expected bahavior, that all button presses get canceled as soon as notifyItemChanged is called or am I doing something wrong? Does this even work with the onClickListener or do I need an onTouchListener and save the touchdown state in the item and reset it every update?
Thank you!
Edit:
I found out, that if I set
recyclerView.setItemAnimator(null);
it works without problems. Does anyone know why that is the case and how I can still get animation without the hassle of remembering all the states?
When you call adapter.notifyItemChanged(items.indexOf(item)); it rebind view for that position, which is fresh view stored in ViewHolder & don't have a pressed state & that's why it loses button state.
You can do it by using OnTouchListener and storing states as you mentioned in question.
I am writing as anshwer since i don't have reputation for comment.
How can I make a TextView selectable? By this I do not mean that I want to make the text within the TextView to be selected. What I want is that when the user taps on the TextView, it enters the selected state, and when the user taps another TextView in the layout, it exits the selected state and enters the default state.
You can assign an onClickListener to any view, and do whatever you want when it is clicked.
So bottom line:
findViewById(R.id.yourViewName).setOnClickListener( new View.OnClickListener() {
#Override
public void onClick(View v) {
//Do whatever you need to do here
}
});
You can create an instance of TextView which will be used to know the last clicked TextView:
private TextView lastClicked;
Then in the onClickListener method of your TextViews, you have to change your lastClicked TextView to the current one.
myTextView.setOnClickListener(new Button.OnClickListener() {
public void onClick(View v) {
lastClicked = (TextView) v;
}
});
This way, you can retrieve the selected TextView from the lastClicked variable.
That already exists, it's not called selected, it's called focused. You can check if a TextView is focused by doing:
myTextView.isFocused()
And in an activity you can get the current focused view by doing
getCurrentFocus()
Currently i am having some problem with implementing onclicklistener to a dynamically creating textview. I will explain the problem more detailed. What i need to do is, i need to create textviews when i click a button in an activity and when i click on that textview it should get removed. but i am not able to set onclicklistener to each textview. Since, set onclicklistener of textviews are written inside the onclick function of the above said button(button used for creating the textview), its scope get over when it exits from onclick function of the button(i think this is the problem). So i tried using visible and invisible feature, which will create the textviews before hand and make them invisible and they are made visible only when the button(button used for creating the textview)is clicked. But here even though it is invisible the space will be allocated(ie, blank space will be availabe).
Here is my code
This button addphone will dynamically create textview by inserting the value present in the edittext phoneno
addphone.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
if(phoneno.getText().toString().length() > 0 && counter < MAX)
{
addphoneno[counter] = phoneno.getText().toString();
phoneno.setText("");
final TextView mybox = new TextView(getApplicationContext());
mybox.setText(addphoneno[counter]);
mybox.setPadding(5, 5, 5, 5);
mybox.setBackgroundColor(Color.rgb(99, 99, 99));
contactbox[counter] = mybox;
contactbox[counter].setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
contactbox[counter].setId(100+counter);
contactbox[counter].setText(addphoneno[counter]+" "+"X");
contactbox[counter].setClickable(true);
contactbox[counter].setOnClickListener(this); //This doesn't work!!!!!
counter = counter+1;
}
}
});
But the setOnClickListener in the above line is not working
So can anyone pls help me with this problem. I hope you are clear with my question.
Thank You!
You can try this:
private OnClickListener phoneViewClickListener = new OnClickListener() {
#Override
public void onClick(View v) {
// your code
}
};
and use that listener in your TextViews:
contactbox[counter].setOnClickListener(phoneViewClickListener);
You will have to actually define a onClickListener instead of simply setting it as a boolean value.
contactbox[counter].setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
//this is where you would handle your click event
}
});
Good luck!
If your button was defined on the xml layout you can do that.
In your xml layout you can define which method will be called when a user click on your button:
<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/add_phone"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="#string/button_send"
android:onClick="addTextView" /> // This is most imporant line
Your activity must have a method with the same name with a View parameter, like that:
/** Called when the user touches the button */
public void addTextView(View view) {
// Do something in response to button click
if(phoneno.getText().toString().length() > 0 && counter < MAX)
{
addphoneno[counter] = phoneno.getText().toString();
phoneno.setText("");
final TextView mybox = new TextView(getApplicationContext());
mybox.setText(addphoneno[counter]);
mybox.setPadding(5, 5, 5, 5);
mybox.setBackgroundColor(Color.rgb(99, 99, 99));
contactbox[counter] = mybox;
contactbox[counter].setLayoutParams(new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
contactbox[counter].setId(100+counter);
contactbox[counter].setText(addphoneno[counter]+" "+"X");
contactbox[counter].setClickable(true);
contactbox[counter].setOnClickListener(this); //This will work \o/
counter = counter+1;
}
}
}
On this method you should put your code to addViews.
As the behavior of all added textview must to be the same( i understood in that way), be removed when a user clicked on it, you can make your activity implements onClickListener and with that you just need to implement correctly the onClick method of your activity.
I have a TextView with the android:onClick attribute. When clicked, the TextView disappears. I don't want the TextView to disappear when clicked. Any ideas?
Edit:
<TextView android:id="#+id/textView1"android:text="Click Me!"
android:layout_width="wrap_content"
android:layout_height="wrap_content" android:onClick="processClick"
android:clickable="true"/>
http://i1179.photobucket.com/albums/x386/jenningsr2006/unclicked.png
http://i1179.photobucket.com/albums/x386/jenningsr2006/clicked.png
Edit
/** Called when the activity is first created. */
#Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.example);
TextView t = (TextView)findViewById(R.id.textView1111);
t.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// Do some job here
Toast.makeText(getApplicationContext(), "Clicked", Toast.LENGTH_SHORT).show();
}
});
Clicking it does the operation correctly, that's not the problem. When I "mousedown" on the TextView, it disappears, then reappears on "mouseup".
I thought I had the same problem but it turned out the textview was not dissapearing, rather the color was changing so that it was the same as the background color. Thus it appeared hidden but it really was there. You can set the clicked color of the text view by setting it's color state list resource
http://developer.android.com/guide/topics/resources/color-list-resource.html
Have you registered a method processClick? There is no need to do it this way. Remove the clickable property and also onClick property. More simple approach is to set onClick listener from the code, for example in onCreate method:
TextView text = (TextView) findViewById(textView1);
text.setOnClickListener(new OnClickListener()
{
#Override
public void onClick(View v)
{
// Do some job here
}
});
The view becomes clickable automatically when you set an on click listener. Good luck
I'm creating buttons dynamically ...
for(int i=0; i<colSize;i++){
final Button btn = new Button(this);
btn.setText(SectionName[i]);
btn.setTextSize(10);
btn.setPadding(8, 3,8, 3);
btn.setTextColor(Color.WHITE);
btn.setTypeface(Typeface.SERIF, Typeface.BOLD);
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
//***Every time that I click my button is selected !:)
btn.setSelected(true);
}
});
}
But how could I deselect the other buttons that were selected, I just want one Button selected! :)
The brutal way (works if you have few buttons) - save your button references and create private method which loops through your buttons and deselects once you don't need
Extend your button class and make it listen for custom event which is generated when one of the buttons is clicked
Look at the RadioGroup implementation
Variation of #1. Instead of creating separate listeners for your buttons create just one and reuse it for all buttons. Extend that listener from OnClickListener and add List field. Each time you assign listener to the button add button reference to that list. Now, when onClick is triggered simply loop through the list and disable "other" buttons
Declare a variable to store the Id of the Clicked Button ::
private int EnabledButton;
set an ID on every button when are created ::
btn.setId(i);
or a tag ::
btn.setTag(i);
then in that Listener get the "EnabledButton", and call a function to deselect the other buttons::
btn.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
EnabledButton=btn.getId();
DeselectButtons();
btn.setSelected(true);
}
});
The Function to deselect the other Buttons ::
public void DeselectButtons() {
for(int i=0; i<NumberofButtons;i++){
if (EnabledButton!= i)
this.findViewById(i).setSelected(false);
}
}