I have a checkbox. It is set to true or false depending on if a task is done or not (its a manual change). When the task is done I want the textview label to change frmo not done to done and vice versa. So I have the following code. When they click the checkbox the onCheckedChanged method does get fired off. It chooses sets the string depending on if it is true or false correctly. But then it just exits. I get no error in the logs or on the screen but when I step through the program after it sets the string in the onCheckedChanged method it just exits the getView method completely. I cant understand what is going wrong. Theres a small problem in the first couple lines that the logic for setting if the box is true or false is not entirely correct but thats fine I can fix that no problem. I just cant understand why I cant update the label after clickign the checkbox. Any help would be great.
final CheckBox statusView = (CheckBox)convertView.findViewById(R.id.statusCheckBox);
//statusView.setChecked(true);
if(toDoItem.getStatus().toString().compareTo(ToDoItem.Status.DONE.toString()) == 0)
statusView.setChecked(true);
else
statusView.setChecked(false);
// TODO - Must also set up an OnCheckedChangeListener,
// which is called when the user toggles the status checkbox
statusView
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
Log.i(TAG,"Entered onCheckedChanged()");
if(isChecked)
statusLabelValue = "Done";
else
statusLabelValue = "Not Done";
}
});
TextView statusLabel = (TextView)convertView.findViewById(R.id.StatusLabel);
statusLabel.setText(statusLabelValue);
You will have to change the textview's text in the listener:
statusView
.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView,
boolean isChecked) {
Log.i(TAG,"Entered onCheckedChanged()");
if(isChecked)
statusLabelValue = "Done";
else
statusLabelValue = "Not Done";
((TextView)(convertView.findViewById(R.id.StatusLabel))).setText(statusLabelValue);
}
});
Related
Can I programmatically check a checkbox and make it call whatever it is coded to do once checked or unchecked?
For example, if I have a checkbox like this
checkBox.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if(isChecked) {
Toast.makeText(getContext(), "You checked the checkbox!", Toast.LENGTH_SHORT).show();
}
else {
Toast.makeText(getContext(), "You unchecked the checkbox!", Toast.LENGTH_SHORT).show();
}
}
});
And then would've called
checkBox.setChecked(true);
my checkbox would appear checked but it wouldnt make the toast.
You can do any of the following
1. Create the listener object separate and call it manually when you call setChecked
2. Extract the method for implementation of onCheckedChanged and call it manually on your change.
As the name suggest setOnCheckedChangeListener, it only calls your callback if the checkbox value actually changes.
So if it's already checked (true), and then you call checkbox.setChecked(true), the value hasn't changed, so your callback won't be called.
Try to do checkbox.setChecked(false), and it should be working correctly.
That's my best guess, without seeing the rest of your code / xml.
Android widgets' click or touch events are not simulated. you can change states of of widgets like disabling ,enabling ,checked or unchecked programmatically but todo any task when state changes , you have to change their states manually by touching on that widget.
checkBox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
if (isChecked) {
Toast.makeText(getContext(), "You checked the checkbox!", Toast.LENGTH_SHORT).show();
}
} else {
Toast.makeText(getContext(), "You unchecked the checkbox!", Toast.LENGTH_SHORT).show();
}
}
});
Just Cheked it. it will work for me.
if you add checkboxes in LinearLayout (let's call it checkLayout) like this :
val widget = AppCompatCheckBox(checkLayout.context)
val params = LinearLayout.LayoutParams(
LinearLayout.LayoutParams.MATCH_PARENT,
LinearLayout.LayoutParams.WRAP_CONTENT
)
widget.tag = "something you can specify later"
checkLayout.addView(widget)
the code for get the selected checkbox is like this:
checkLayout.children.forEach { cb ->
if(cb is AppCompatCheckBox && cb.isChecked){
// here you have your checkbox and by tag maybe you can do whatever you want
}
}
and for dynamic added RadioButton you can add them in RadioGroup (let's call it radioLayout) and get the selected like :
val rb: AppCompatRadioButton? = radioLayout.findViewById(radioLayout.checkedRadioButtonId)
if(rb.tag == "something"){
//your code here
}
Can an editText field be enabled instantly when I call editText.setEnabled(true); ?
Currently I have a code which says:
toggleButton = (ToggleButton) findViewById(R.id.toggleButton);
row1TextField = (EditText) findViewById(R.id.row1EditText);
row2TextField = (EditText) findViewById(R.id.row2EditText);
if(toggleButton.isChecked())
{
if(row1TextField.isFocused()){
row2TextField.setEnabled(false);
}
}
if(!toggleButton.isChecked())
{
if(row1TextField.isFocused()){
row2TextField.setEnabled(true);
}
}
With this code, the setEnabled on EditText doesn't reflect instantly though. For example is, when I switch between the states ON and OFF of my toggleButton, the Row2TextField isn't enabled/disabled automatically eventhough I'm on row1TextField on. I have to click the other EditText and go back to row1TextField in order to disable/enable it.
Is there a way I can let it reflect its state instantly instead of changing to different Focus in order to enable it?
you should use onCheckedChangedListender for ToggleButton
and should like this
toggle.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
// TODO Auto-generated method stub
if(isChecked){
row1TextField.setEnabled(true);
row2TextField.setEnabled(false);
}
else
{
row1TextField.setEnabled(false);
row2TextField.setEnabled(true);
}
}
});
In this way, you can be enable/disable instantly.
How to enable all the items in listview when check box is selected and disabled when check box is unchecked.I have used
if(checkbox.isChecked)
{
listview.setEnabled(false)
listview.setClickable(false)
}
else
{
listview.setEnabled(true)
listview.setClickable(true)
}
But it is not working.Any help would be greatly appreciated.
Thanks in Advance:)
if(yourcheckbox.isChecked()){
yourlistview.setClickable(true);}
else{
yourlistview.setClickable(false);}
You can run this as a background process, in a separate thread so it keeps getting checked, whether the checkbox is checked or not.
you can use OncheckedChangeListener method of Checkbox class
checkbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton arg0, boolean isChecked) {
if(isChecked)
{
listview.setEnabled(false)
listview.setClickable(false)
}
else
{
listview.setEnabled(true)
listview.setClickable(true)
}
}
});
I have a multiple checkbox and a button. What should I do to disable the button if none of the checkbox is check and enable the button if it's checked?
Try with this,
Button mButton=(Button)findViewById( R.id.button01);
CheckBox mCheckBox= ( CheckBox ) findViewById( R.id.checkbox01);
mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if ( isChecked )
{
mButton.setEnabled(true);
}else{
mButton.setEnabled(false);
}
}
});
When you enter in that view make the button disabled (in your XML), and whenever user hit any of the check-boxes manage one global variable e.g if the global count is > 1 then make the button enable in that activity.
Manage the global variable in a way that if user is turning on the check box then increment it and if he is turning off the checkbox decrease the counter.
I hope you got the concept.
Basically it is all about managing the count how many checkboxes are turned on; if more then one is turned on make the button enabled else make it disabled.
Instead of enabling and disabling the button you can use setVisibility() method for button.
In the following manner.
Button btn =(Button)findViewById( R.id.mybutton);
CheckBox checkBox= ( CheckBox ) findViewById( R.id.checkbox01);
mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
if ( isChecked )
{
btn.setVisibility(VISIBLE);
}
else{
btn.setVisibility(GONE);
}
}
});
By using this method you can set the visibility of your view.Your button will be visible only if checkBox is cheaked otherwise your button will not be visible.Let me know it works or not for you.
Use this:
myButton.setEnabled(false);
See this question for more details.
you can disable button by using below code.
mBtn.setEnabled(false);
and can enable it later by using below code
mBtn.setEnabled(true);
mCheckbox.setOnCheckedChangeListener(new OnCheckedChangeListener() {
#Override
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
mButton.setEnabled(isChecked);
}
});
as simple as that :)
try this
termsAndConditionsCheckBox.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (termsAndConditionsCheckBox.isChecked() && privacyPolicyCheckBox.isChecked()){
agreebutton.setEnabled(true);
agreebutton.setTextColor(getResources().getColor(android.R.color.white));
agreebutton.setBackgroundColor(getResources().getColor(android.R.color.holo_blue_light));
}
else {
agreebutton.setEnabled(false);
agreebutton.setTextColor(getResources().getColor(android.R.color.white));
agreebutton.setBackgroundColor(getResources().getColor(android.R.color.darker_gray));
}
}
});
privacyPolicyCheckBox.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
if (termsAndConditionsCheckBox.isChecked() && privacyPolicyCheckBox.isChecked()){
agreebutton.setEnabled(true);
agreebutton.setTextColor(getResources().getColor(android.R.color.white));
agreebutton.setBackgroundColor(getResources().getColor(android.R.color.holo_blue_light));
}
else {
agreebutton.setEnabled(false);
agreebutton.setTextColor(getResources().getColor(android.R.color.white));
agreebutton.setBackgroundColor(getResources().getColor(android.R.color.darker_gray));
}
}
});
I have an application that displays a ListView using a CursorAdapter that I have customized. Within my custom CursorAdapter.bindView, I have a CheckBox object that I set the checked value (based on a column on the cursor) and set a clickListener. Here is my code:
CheckBox mCheckBox = (CheckBox) view.findViewById(R.id.list_done);
mCheckBox.setChecked(isDone);
mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
AW.getDB().updateTask(c.getInt(c.getColumnIndex(ToDoDBAdapter.KEY_ID)), isChecked);
TD.displayTasks();
}
});
The only problem is that when Android recycles my views, the onCheckedChangeListener is still active, and thus the call to setChecked() causes that code within the listener to run. I would like to know how to invalidata the onCheckedChangedListener right before the code I have included runs.
You can call mcheckBox.setOnCheckedChangeListener(null); if it is done inside the onCheckedChangeListener, you need to declare mCheckBox final.
You can do something like:
// c is the Cursor you are getting
CheckBox mCheckBox = (CheckBox) view.findViewById(R.id.list_done);
mCheckBox.setTag(new Integer(c.getPosition());
mCheckBox.setChecked(isDone);
mCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener()
{
public void onCheckedChanged(CompoundButton buttonView, boolean isChecked)
{
Integer posInt = (Integer)buttonView.getTag();
int pos = posInt.intValue();
c.moveToPosition(pos);
AW.getDB().updateTask(c.getInt(c.getColumnIndex(ToDoDBAdapter.KEY_ID)), isChecked);
TD.displayTasks();
}
});
There are lots of optimizations you can do to above code. I just illustrated the basic logic.