I want to know how to get data from 2 different fragments inside tab layout.
For example: In this image there two tabs tab1 and tab2 both have different values stored in edit text .
tab1 helloooooo, tab2 hiiiiiii
and i have a button available in main activity which is used for getting the data from both tabs in same time.
Now my Problem is How i can get the data from both tabs at same time when user click on the
get data button
1.) Keep a reference of your fragment in your activity.
public class Activity extends AppCompatActivity {
private yourFargment frag1,frag2;
}
2.) Get the object reference into your reference variables in Adapter's getItem().
@Override
public Fragment getItem(int index) {
switch (index) {
case 0:
frag1 = yourFargment.newInstance(index);
//frag1 =new yourFargment (); can also be used
return frag1;
case 1:
frag2 = yourFargment.newInstance(index);
return frag2;
}
return null;
}
3.) Inside your onClick you can simply get those values from edittext.
onClick(View..){
String val1 = frag1.edittext1.getText().toString(); // Note: make your `edittext` public
String val2 = frag2.edittext2.getText().toString();
or
String val1 = frag1.getData();
String val2 = frag2.getData();
}
where getData is a public method inside your fragment
public class yourFragment..{
public String getData(){
return edittext.getText().toString();
// Note: with this no need to make your `edittext` public
}
}
Take member object of both Fragment in your activity..
FirstFragment mFirstFragment;
SecondFragment mSecondFragment;
Create instance of both in getItem(int position) method of ViewPagerAdapter.
@Override
public Fragment getItem(int position) {
// instantiate the fragment for the given page.
switch (position) {
case 0:
if (null == mFirstFragment) {
mFirstFragment = FirstFragment.newInstance();
}
return mFirstFragment;
case 1:
if( null == mSecondFragment ) {
mSecondFragment = SecondFragment.newInstance();
}
return mSecondFragment;
}
return null;
}
Call getData method of both Fragment when button clicked from activity.
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.button1:
// Get data and use it as you want.
mFirstFragment.getData();
mSecondFragment.getData();
break;
}
}
You can use like this way:
Bundle bundle = new Bundle();
bundle = getActivity().getIntent().getExtras();
YourFragment fragment = new YourFragment();
bundle.putString("yourKey", yourValue);
fragment.setArguments(bundle);
Then you can get them in your second fragment
in onCreateView
if (getArguments() != null)
{
mParam1 = getArguments().getString("yourKey");
}
At the time when you are settings fragment in tabs you have 2 objects of those fragments. By using those objects, you can retrieve the value from your fragments. Write following code into your MainActivity e.g.
if(tab1fragment != null) {
String text = tab1fragment.getData();
}
and in Fragment, create a method like
public String getData(){
return edittext.getString().toString();
}
This way you can retrieve the data from fragments.
Tablayout only contains TabItems not Fragment. So, I believe that you use TabLayout combines with ViewPager, which actually contains 2 different Fragments. I suppose maybe you want to getData() at the Activity from 2 Fragments. At this point, you can easily Fragment callback the Activity and provide data just like getData(). The code will look like
In Fragment
public class BaseFragment extends Fragment {
protected DataCallback mCallback;
@Override public void onAttach(Context context) {
super.onAttach(context);
if (context instanceof DataCallback) {
mCallback = (DataCallback) context;
}
}
//some place fragment affect to data
private void someFunction() {
mCallback.updateDataToActivity(data);
}
}
In Activity
public class MyActivity extends BaseActivity implements DataCallback {
T data;
public void updateDataToActivity(T data) {
this.data = data
}
// This is your getData function
private T getData() {
return data;
}
}
And DataCallback
public interface DataCallback {
void updateDataToActivity(T data);
}
You can use data bus library like Otto : http://square.github.io/otto/
Or Rxjava : https://github.com/ReactiveX/RxJava
Both of these libraries are made for propagate data between classes.
Each tab has an EditText with an id
in tab1.xml it's edit1
<EditText
android:id="@+id/edit1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
and it's edit2 in tab2.xml
<EditText
android:id="@+id/edit2"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
tab1.xml and tab2.xml also has a button which can be clicked. It has the same id if you want on tab1 and tab2.
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/knop"
android:onClick="klik"/>
The item that matters is the OnClick. It point to a piece of code which must be implemented in the MainActivity.java code
public void klik(View v){
alert("Just an alert.");
String val1 = ((EditText) findViewById(R.id.edit1)).getText().toString();
String val2 = ((EditText) findViewById(R.id.edit2)).getText().toString();
alert(val1);
alert(val2);
alert(val1 + val2);
}
At last the alert routine
private void alert(String message){ //mies
AlertDialog alertDialog = new AlertDialog.Builder(this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage(message);
alertDialog.setButton(AlertDialog.BUTTON_NEUTRAL, "OK",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
}
});
alertDialog.show();
}
In fact the fragments can be treated as one page. You can retrieve the information from each field by id from the calling main page, in this case MainActivity.java.
