I want to use the same button to perform 2 different methods.
One method when user single clicks it and a second method (different) when the user LONG clicks it.
I use this for the single short click (which works great):
Button downSelected = (Button) findViewById(R.id.downSelected);
downSelected.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
method();
}
}
});
I've tried to add a longClickListener but it didn't work.
Appreciate any ideas on how to solve this.
Thanks!
I've done it before, I just used:
down.setOnLongClickListener(new OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
return true;
}
});
Per documentation:
public void setOnLongClickListener
(View.OnLongClickListener l)
Since: API Level 1 Register a callback
to be invoked when this view is
clicked and held. If this view is not
long clickable, it becomes long
clickable.
Notice that it requires to return a boolean, this should work.
To get both functions working for a clickable image that will respond to both short and long clicks, I tried the following that seems to work perfectly:
image = (ImageView) findViewById(R.id.imageViewCompass);
image.setOnClickListener(new OnClickListener() {
public void onClick(View v) {
shortclick();
}
});
image.setOnLongClickListener(new View.OnLongClickListener() {
public boolean onLongClick(View v) {
longclick();
return true;
}
});
//Then the functions that are called:
public void shortclick()
{
Toast.makeText(this, "Why did you do that? That hurts!!!", Toast.LENGTH_LONG).show();
}
public void longclick()
{
Toast.makeText(this, "Why did you do that? That REALLY hurts!!!", Toast.LENGTH_LONG).show();
}
It seems that the easy way of declaring the item in XML as clickable and then defining a function to call on the click only applies to short clicks - you must have a listener to differentiate between short and long clicks.
Initially when i implemented a longClick and a click to perform two separate events the problem i face was that when i had a longclick , the application also performed the action to be performed for a simple click . The solution i realized was to change the return type of the longClick to true which is normally false by default . Change it and it works perfectly .
Change return false; to return true; in longClickListener
You long click the button, if it returns true then it does the work. If it returns false then it does it's work and also calls the short click and then the onClick also works.
Try using an ontouch listener instead of a clicklistener.
http://developer.android.com/reference/android/view/View.OnTouchListener.html
The simplest and updated method is using a long click listener like
someView.setOnLongClickListener {
//do your work
true
}
Related
My Android app shows a floorplan, on which transparent Buttons are set on specific areas. I also implemented a Voice Recognition, that returns a Listview. When the user chooses one item the performClick() Method is performed, which calls the OnClick method. The OnClick method is also called, when the user clicks on the specific area on the display (transparent button)
My question is, how can I see, if the Button is clicked by performClick() or by click on the display?
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
button.setBackgroundColor(Color.GREEN);
}
});
wordsList.setOnItemClickListener(
new OnItemClickListener() {
#Override
public void onItemClick(AdapterView<?> arg0, View view,
int position, long id) {
// TODO Auto-generated method stub
Object o = wordsList.getItemAtPosition(position);
String pen = o.toString();
if (pen.equals("String")) {
button.performClick();
Toast.makeText(getApplicationContext(), "You have chosen: " + " " + pen, Toast.LENGTH_LONG).show();
}
}
}
);
I already found that post, but I don't know how to implement this in Java.
how to check if the click is Performclick or not
I had the exact same question. Surely I thought there must be a built-in return method of some sort that could tell us whether or not a click was performed by the actual onClick() method or by performClick() but after a while of searching I instead decided to make my own solution...
In the class that perform clicked is called create:
public static boolean performClicked;
In your method that calls "performClick()" simply change
performClicked = true;
right before the call to perform click.
in your onClick use a similar if statement:
if (performClicked){
performClicked = false;
//DO WHAT YOU NEED TO DO WITH THIS INFO
}
I know this is kind of an obvious answer, but maybe not.
I am beginner to Android development. I have 3 edit boxes and one "Edit" button. When I launch the activity all the edit boxes should be disabled. When I click on the Edit button all the 3 edit boxes should get enabled and button text should change to "Save". After updating the data in the edit boxes, when I click on the "Save" button, I should be able to send the updated data to the backend.
My problem is how can I make use of a single button for two function "Edit" and "Save".
Please help me.
You can do it this way:
button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View arg0) {
String ButtonText = button.getText().toString();
if(ButtonText.equals("Save"){
//code for save
button.setText("Edit");
}
else{
//code for edit
button.setText("Save");
}
}
});
If I were you I would actually use two buttons one for edit, and one for save. Make them the same size and in the same position, when you want to switch between them make one invisible, and the other visible. Doing it that way would let you keep your onClickListeners separate which would make your code more understandable in my mind.
That being said you could technically achieve it with a single button as well. Just change the text on the button when you want to switch between them, and add an if statement into your click listener to check which "mode" your button is currently in to determine which action it should take.
I am not sure there is an easy way to do this or not. but you can sure use different behaviors of button clicks like
// When you press it for long time.
dummyButton.setOnLongClickListener(new OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
return true; // Can do lot more stuff here I am just returning boolean
}
});
// Normal click of button
dummyButton.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
//do lot more stuff here.
}
});
Do it this way :
Make a public boolean variable
public boolean isClickedFirstTime = true;
make your 3 editTexts enabled false in xml and
onClick of your button
#Override
public void onClick(View v) {
if (v.getId() == R.id.edit_button_id) { //whatever your id of button
Button button = (Button) findViewById(R.id.edit_button_id);
if(isClickedFirstTime)
{
edit1.setEnabled(true);
edit2.setEnabled(true);
edit3.setEnabled(true);
butt.setText("Save");
isClickedFirstTime = false;
}
else
{
....//Get your values from editText and update your database
isClickedFirstTime = true;
}
}
I need your help if any one can be, it will be great thing for my solution.
I don't know is it possible or not, but I want to try to fix this out any how..
Actually I want to implement two method on single button click event, its simple click and long click, here my code ::
homebutton = (ImageButton) findViewById(R.id.home_icon);
homebutton.setOnClickListener(new OnClickListener() {
public void onClick(View arg0) {
Intent intent = new Intent(context, MainActivity.class);
startActivity(intent);
}
});
homebutton.setOnLongClickListener(new OnLongClickListener() {
public boolean onLongClick(View arg0) {
Toast.makeText(getApplicationContext(), "Long Clicked " , Toast.LENGTH_SHORT).show();
return false;
}
});
So, here i am getting something wrong, even single click is working perfectly, and long click is also working, but problem is that after long click event its also start MainActivity as defined in above code of onClick method..
That should not be done, return false is also there, still not working as i want..
So, anybody please help me to get it resolve..
Thanks in Advance..
I believe you need to return TRUE in your onLongClick method - telling the framework that the touch event is consumed and no further event handling is required.
homebutton.setOnLongClickListener(new OnLongClickListener() {
public boolean onLongClick(View arg0) {
Toast.makeText(getApplicationContext(), "Long Clicked " ,
Toast.LENGTH_SHORT).show();
return true; // <- set to true
}
});
I have seen several articles such as this one describing how to handle a long press event with a button. I can follow these directions but I am wondering if it is possible to do it the same way I handled a click. The way I handled a click was to define the handler in XML as such:
<Button
android:id="#+id/btn_NextLift"
...
android:onClick="btn_NextLiftClick" />
then in code as such:
public void btn_NextLiftClick(View vw_Current)
{...}
I do see the boolean property longClickable in the xml but I don't see where to define an event handler so...???
TIA
JB
You can't do this via XML. Instead, use:
Button button = (Button) findViewById(R.id.btn_NextLift);
button.setOnLongClickListener(new OnLongClickListener() {
#Override
public boolean onLongClick(View v) {
// TODO Auto-generated method stub
return true;
}
});
Make sure this code comes after setContentView() has been called.
Also, make sure that the longClickable property is set to true.
There are a lot of options on how to define a click/tap on the touchscreen. One of them for example is setting a boolean.
Example for boolean:
boolean buttonClicked = true;
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (buttonClicked) {
//do that and this
}
}
});
And there's a isPressed() method:
button.setOnClickListener(new View.OnClickListener() {
public void onClick(View v) {
if (button.isPressed()) {
//do that and this
}
}
});
What exactly is the difference between them? And when and why do I use boolean and the method isPressed()?
Because you are referring to a button in both of your examples, I assume that you are referring to the user tapping on a button, not just a random touch on the screen.
That being said, both of the examples you provided are not good.
In your first example, the boolean is useless because it is always true, so //do that and this will always be reached.
In your second example, your if statement is useless, because the onClick method by its nature is only reached when the button is tapped.
A good way to listen for a button press is using a click listener like this:
Button button = (Button) findViewById(R.id.buttonId);
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// Code placed here will run every time the button is tapped
}
});
...where R.id.buttonId is the ID of your button in the layout.
If you need to define click event for a View you can use onClickListener, onTouchListener.
For more information check for Android official Documentation.
onTouchListener
onTouchListener
When considering your first code snippet, You can use boolean to perform another operation on button click event. as example something like this ,
boolean buttonClicked = false;
button.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
//true after button clicked
buttonClicked = true;
}
});
//if buttonClicked equals true
if (buttonClicked){
//perform operation only after button clicked
}
when considering your second code snippet, no need of button.isPressed() inside
button's onClick() callback. Because what you want to do by checking button.isPressed() is done without it inside button's onClick() callback.
Keep in mind these things.
isPressed() is a public method of View Class
Button is a subclass of View Class
isPressed() is a public method of Button Class as well.
About isPressed() from Android official documentation.
Indicates whether the view is currently in pressed state. Unless
setPressed(boolean) is explicitly called, only clickable views can
enter the pressed state.
Returns true if the view is currently pressed, false otherwise.