How do I clear all the EditText fields in a layout with a Clear Button. I have a registration Activity that has about 10 different EditTexts. I know I could go and grab a reference to each specifically and then set.Text(""); But I am looking for a more dynamic elegant way. Possibly grab the Layout and loop through all the items in there looking for EditText types and then setting those to "". Not sure how to do that though and tried searching on the web for it but no luck. Any sample code?
The answer by #Pixie is great but I would like to make it much better.
This method works fine only if all the EditText are in a single(one) layout but when there are bunch of nested layouts this code doesn't deal with them.
After scratching my head a while I've made following solution:
private void clearForm(ViewGroup group) {
for (int i = 0, count = group.getChildCount(); i < count; ++i) {
View view = group.getChildAt(i);
if (view instanceof EditText) {
((EditText)view).setText("");
}
if(view instanceof ViewGroup && (((ViewGroup)view).getChildCount() > 0))
clearForm((ViewGroup)view);
}
}
To use this method just call this in following fashion:
clearForm((ViewGroup) findViewById(R.id.sign_up));
Where you can replace your R.id.sign_up with the id of root layout of your XML file.
I hope this would help many people as like me.
:)
You can iterate through all children in a view group and clear all the EditText fields:
ViewGroup group = (ViewGroup)findViewById(R.id.your_group);
for (int i = 0, count = group.getChildCount(); i < count; ++i) {
View view = group.getChildAt(i);
if (view instanceof EditText) {
((EditText)view).setText("");
}
}
Use editText.getText().clear();
after onclick of any action do below step
((EditText) findViewById(R.id.yoursXmlId)).setText("");
or Clear all EditText fields by iterating all childrens:
ViewGroup group = (ViewGroup)findViewById(R.id.your_group);
for (int i = 0, count = group.getChildCount(); i < count; ++i) {
View view = group.getChildAt(i);
if (view instanceof EditText) {
((EditText)view).setText("");
}
}
or use simple below step :
editText.getText().clear();
Might be helpful.
It's very simple.Type this in your function of button-
finish();
startActivity(this,YourCurrentActivity.class);
As Simple as that.
Welcome.
In my case I've done this.
public static void resetForm(ViewGroup group) {
for (int i = 0, count = group.getChildCount(); i < count; ++i) {
View view = group.getChildAt(i);
if (view instanceof EditText) {
((EditText) view).getText().clear();
}
if (view instanceof RadioGroup) {
((RadioButton)((RadioGroup) view).getChildAt(0)).setChecked(true);
}
if (view instanceof Spinner) {
((Spinner) view).setSelection(0);
}
if (view instanceof ViewGroup && (((ViewGroup) view).getChildCount() > 0))
resetForm((ViewGroup) view);
}
}
I used this for nested LinearLayout to clear EditTexts and RadioButtons
//method clear
private void clear(ViewGroup group)
{
for(int i=0,count=group.getChildCount();i
if(view instanceof LinearLayout)
{
clear((ViewGroup) view);
}
else if(view instanceof EditText)
{
((EditText) view).getText().clear();
}
if (view instanceof RadioButton)
{
((RadioButton) view).setChecked(false);
}
}//end for
}//end method clear
You can always do this...it works for me:
mClearButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
mEditName.getText().clear();
mEditSummary.getText().clear();
mEditPrice.getText().clear();
mEditQuantitiy.getText().clear();
}
});
this way you have one fat button that clears all the fields for you once
I created a reset button and write a reset onclick method as follow:
public void reset(View View){
Intent intent = new Intent(MainActivity.this, MainActivity.class);
intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
startActivity(intent);
}
It works for me and also it works without addflags part. But I would like to know whether it is a good approach or not.
// Update answer
private void clearEditTextGroup(ViewGroup group){
for(int i=0 ; i< group.getChildCount(); i++){
View view = group.getChildAt(i);
if(view instanceof EditText){
// use one of clear code
}
if(view instanceof ViewGroup && (((ViewGroup)view).getChildCount() > 0))
clearEditTextGroup((ViewGroup)view);
}
}
use one of this code to clear your edittext
edittext.getText().clear();
or
edittext.setText(null);
or
edittext.setText("");
use
editText.getText().clear();
or setText as Empty using this below code
editText.setText(");
Related
I have a fragment with about 30 EditText inside it. I want to know is there any way to grab all EditTexts and clear the text inside it without doing it one by one.
thanks.
This should work if all your edittexts are within the same layout, for example a relativelayout
ViewGroup group = (ViewGroup)findViewById(R.id.your_group);
for (int i = 0, count = group.getChildCount(); i < count; ++i) {
View view = group.getChildAt(i);
if (view instanceof EditText) {
((EditText)view).setText("");
}
}
Try something like this :
ArrayList<EditText> editTextsList = new ArrayList<EditText>();
for( int i = 0; i < myLayout.getChildCount(); i++ )
if( myLayout.getChildAt( i ) instanceof EditText )
editTextsList.add( (EditText) myLayout.getChildAt( i ) );
The iterate on editTextsList and do your actions on each of EditText on the list
I hope this helps
Yes, you can do with the following method.
public void clearStudentInfo(ViewGroup textViewsGroup) {
for (int i = 0, count = textViewsGroup.getChildCount(); i < count; ++i) {
View view = textViewsGroup.getChildAt(i);
// Check and confirm, is it is the TextView or not?
if (textViewsGroup instanceof EditText) {
((EditText)textViewsGroup).setText("");
}
}
}
You can call the method when you click on clear button as given below.
...
Button btnClear = findViewById(R.id.btnClr);
...
btnClear.setOnClickListener(new View.OnClickListener) {
#Override
void onClick(...) {
clearStudentInfo((ViewGroup) findViewById(R.id.student_info));
}
Thanks 😎😎
Can someone please explain why the first piece of code here works but not the last piece? The only difference is the index of which i insert my view, i-1 and i+1. Is i+1 just not possible with index? I can write any other number in there and it works.
upButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
for (int i = 0; i < drawerViewGroup3.getChildCount(); i++) {
View view = drawerViewGroup3.getChildAt(i);
TextView tv = (TextView) view.findViewById(R.id.drawer_name);
if (tv.getText().toString().equals(drawerName.getText().toString()) && i != 0) {
drawerViewGroup3.removeView(view);
drawerViewGroup3.addView(view, i - 1);
}
}
}
});
downButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
for (int i = 0; i < drawerViewGroup3.getChildCount(); i++) {
View view = drawerViewGroup3.getChildAt(i);
TextView tv = (TextView) view.findViewById(R.id.drawer_name);
if (tv.getText().toString().equals(drawerName.getText().toString())) {
drawerViewGroup3.removeView(view);
drawerViewGroup3.addView(view, i + 1);
}
}
}
});
Some context on the app. I have a vertical oriented LinearLayout with multiple LinearLayouts inside. When clicking the two Buttons in the code, one of the children is to move up or down, switching their positions.
EDIT: Ok so I figured it out.
downButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
View viewToMove = null;
int viewToMovePos = drawerViewGroup3.getChildCount();
for (int i = 0; i < drawerViewGroup3.getChildCount(); i++) {
View view = drawerViewGroup3.getChildAt(i);
TextView tv = (TextView) view.findViewById(R.id.drawer_name);
if (tv.getText().toString().equals(drawerName.getText().toString()) && i != drawerViewGroup3.getChildCount() - 1) {
viewToMovePos = i;
viewToMove = view;
}
}
alert.dismiss();
if (viewToMovePos != drawerViewGroup3.getChildCount()) {
drawerViewGroup3.removeView(viewToMove);
drawerViewGroup3.addView(viewToMove, viewToMovePos + 1);
}
}
});
Not the prettiest code and probably not gonna help others as it's very specific, but that was the answer.
When you remove a view from your LinearLayout, the view at index i is now the view which was after the one which you removed. Then you add a view at i - 1 which is before this view (the one which was previously after the removed view). The final result is that you remove a view and insert back where it used to be.
Instead, you need to add the view at i - 2.
I suggest that you look at RecyclerView. It is specifically designed to efficiently create a dynamic list of views for given data. You only have to manipulate the data and RecyclerView does all the hard work for you.
i want to set lots of Edit Texts id's and i don't know how to get those id's.
EditText[] texts;
for(int i=0;i++;i<15){
tests[i]=(EditText)findViewById(R.id. )
}
my Edit Text id's:
et1,et2,et3,...
first create a empty list of EditTexts
then use this code and send them rootView of Your Layout to find all EditTexts :
private List<EditText> editTexts; //global Scop
private void findAllEditTexts(ViewGroup group) {
for (int i = 0, count = group.getChildCount(); i < count; ++i) {
View view = group.getChildAt(i);
if (view instanceof EditText) {
if (editTexts == null)
editTexts = new ArrayList<EditText>();
editTexts.add((EditText) view);
} else if (view instanceof ViewGroup && (((ViewGroup) view).getChildCount() > 0)) {
findAllEditTexts((ViewGroup) view);
}
}
}
now in editTexts List you have all EditTexts :)
my Problem is that i want to create a Checklist with multiple Checkboxes. The biggest Problem is i have more than 100 Checkboxes. I would like an CLEAR Button that clears all Checkboxes by clicking.
How can I do that? And have you an example how to solve it?
The only way i know is that:
Button clear = (Button) findViewById(R.id.clearbtn);
clear.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
CheckBox cb1 = (CheckBox) findViewById(R.id.checkBox2);
cb1.setChecked(false);
}
});
But that way isnt really effective with over 100 checkboxes ...
If you are keeping all the checkboxes on single ViewGroup then it can be done by getting all the childs of that ViewGroup and unchecking. For example 'parent' is the layout that contains all the checkboxes. You can uncheck all by:
for (int i = 0; i < parent.getChildCount(); i++) {
View view = parent.getChildAt(i);
if (view instanceof CheckBox) {
((CheckBox) view).setChecked(false);
}
}
I have solve it. Thanks to #Tuby and #android_hub for the idea with getChildCount().
And special thanks to #Hammad Akram. Now it works :D. My code now:
final LinearLayout ll = (LinearLayout)findViewById(R.id.ll_a320_main);
final int ccount = ll.getChildCount();
Button clear = (Button)findViewById(R.id.btn_a320_clear);
clear.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
//Toast.makeText(ACT_A320.this, "Child: "+ccount,Toast.LENGTH_LONG).show(); -- Test for checking count of Child
for(int i=1; i<ccount;i++){
v = ll.getChildAt(i);
if(v instanceof CheckBox ){
((CheckBox) v).setChecked(false);
}
}
}
});
Now all Checkboxes would detected and set to false.
Is it possible to get all the TextView in an activity and change their values without knowing any ID? May be something like UI automtor tool that return UI hierarchy but at Java programming level. I tried to Google this but couldn't find any solution.
Edit
What I am trying to achieve here is, I have an external library/SDK which modifies all textView values. So I am planning to initialise it on top of each activity and let the SDK do the work of modifying all the TextViews value.
You can use this code to find all TextViews in your layout, just pass the parent view and it will do the rest:
public static void findViews(View v) {
try {
if (v instanceof ViewGroup) {
ViewGroup vg = (ViewGroup) v;
for (int i = 0; i < vg.getChildCount(); i++) {
View child = vg.getChildAt(i);
// recursively call this method
findViews(child);
}
} else if (v instanceof TextView) {
//do whatever you want ...
}
} catch (Exception e) {
e.printStackTrace();
}
}
try this
First initialize the parent control and use this
ArrayList<TextView> list = new ArrayList<TextView>();
for( int i = 0; i < layout.getChildCount(); i++ ){
if( layout.getChildAt( i ) instanceof TextView )
{
// change the values of text view here
((TextView)layout.getChildAt( i )).setText("your text here");
}
}
If you have activity layout then try as follows
ArrayList<EditText> myEditTextList = new ArrayList<EditText>();
for( int i = 0; i < activityLayout.getChildCount(); i++ ){
if( activityLayout.getChildAt( i ) instanceof EditText )
myEditTextList.add( (EditText) activityLayout.getChildAt( i ) );
}
and getting their values
for(int i=0;i < myEditTextList.size();i++){
System.out.println(myEditTextList.get(i).getText().toString());
}
Hope this will helps you.