We Keep Coding

Pass data from an Activity to a fragment [duplicate]

This question already has answers here:
Send data from activity to fragment in Android
(22 answers)
Closed 1 year ago.
I am a little bit lost in this, so I already passed data from my LoginActivity to my DashboardActivity. And it works now (thank god). But now, I would love to pass that data to a fragment.
I have this on my DashboardActivity:
Intent get = getIntent();
String userId = get.getStringExtra(LoginActivity.EXTRA_ID);
Bundle bundle = new Bundle();
bundle.putString("userId", userId);
Fragment fragment = new Fragment();
fragment.setArguments(bundle);
I have this on my Fragment:
Bundle bundle = getArguments();
String userId = bundle.getString("userId");
int uid = Integer.parseInt(userId);
Is it like this?

Getting data in Fragment and Activity are not done in the same way.
To send extra to a fragment, You can do it this way.
In your Activity Class
Bundle bundle = new Bundle();
bundle.putString("userId", "value you want to send");
FragmentClass frag = new FragmentClass();
frag.setArguments(bundle);
Then in Fragement onCreateView
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
String strtext = getArguments().getString("userId");
return inflater.inflate(R.layout.fragment, container, false);
}
The issue with your code is you're getting the argument with a wrong id.
Right way
String userId = getArguments().getString("userId");

From activity to fragment you should use bundle as below
Bundle bundle = new Bundle();
bundle.putString(LoginActivity.EXTRA_ID, "Extra value");
Fragment fragment = new Fragment();
fragment.setArguments(bundle);
Then in your Fragment, get the data for example in onCreate() method
Bundle bundle = this.getArguments();
if (bundle != null) {
String extraId = bundle.getString(key, defaultValue);
}

how to pass a value using intents and bundle

I am trying to pass a value from my Activity to my Fragment but the Bundle is always null.
Activity
CallLogsFragment callLogfrag = new CallLogsFragment();
Intent intent = new Intent(this, DeviceUsageActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("key", callgroup);
callLogfrag.setArguments(bundle);
this.startActivity(intent);
Fragment which is meant to retrieve value from Activity
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
bundle = this.getArguments();
if (bundle != null) {
int myInt = bundle.getInt("key", 0);
}
View view = inflater.inflate(R.layout.fragment_call_logs, container, false);
load(view);
setupList(view);
return view;
}

try this one
// send value from activity to fragment
CallLogsFragment callLogfrag = new CallLogsFragment();
Bundle bundle = new Bundle();
bundle.putInt("key", "4");
callLogfrag.setArguments(bundle);
// call fragment from activity
getSupportFragmentManager().beginTransaction().replace(R.id.containar, callLogfrag).commit();
// get value in fragment
if (getArguments() != null) {
int status = getArguments().getInt("key");

If I am clear with your question!! You are trying to send data from one activity to the fragment in Another activity.
Then you need to first send data in Intent that starts second activity. Then get the data from intent and set your data to fragment as argument and add the fragment to the parent activity.
//here you go, from first activity
Intent intent = new Intent(this, DeviceUsageActivity.class);
Bundle bundle = new Bundle();
bundle.putInt("key", callgroup);
intent.putExtra("yourdata",bundle);
//start your activity - parent activity of your fragment
this.startActivity(intent);
//then get your data in DeviceUsageActivity in onCreate()
Bundle yourdata = null;
if(getIntent().getExtras() != null) {
yourdata = getIntent().getBundleExtra("yourdata");
}
//Then sent data to fragment
CallLogsFragment callLogfrag = new CallLogsFragment();
callLogfrag.setArguments(yourdata);
// add fragment to parent activity
getSupportFragmentManager().beginTransaction().replace(R.id.containar, callLogfrag).commit();
//rest you know - get bundle argument in fragmet

From Activity to store data
Intent i = new Intent(getApplicationContext(), NewActivity.class);
i.putExtra("key","value");
startActivity(i);
To retrieve data back to fragment,use Context as getActivity if needed only in fragments
Bundle extras = getIntent().getExtras();
if (extras != null) {
String value = extras.getString("key");
//The key argument here must match that used in the other activity
}

Android Parcel how to write Bundle

I want to write a Bundle into a Parcel, I use the Parcel.writeBundle Method.
I can write it without any Problem but if I want to read it with Parcel.readBundle it returns an empty bundle. What am i doing wrong?
Here is my Code:
Parcel p = Parcel.obtain();
p.writeParcelable(device, 0);
Bundle b = new Bundle();
b.putString("serial_number",MainActivity.this.T_Serialnbr);
b.putString("model_number", null);
b.putString("mac_address", device.getAddress());
p.writeBundle(b);
Bundle b1 = p.readBundle(); // empty Bundle

Passing data through bundle

I want to send data which i do this way :
public static final String Itemmm = "tryIT";
String item3 = (String)arrayAdapter.getItem(position).toString();
ClassicsA class = new Classics();
Bundle bundle2 = new Bundle();
bundle2.putString(ClassicsB.Itemmm, item3);
class.setArguments(bundle2);
And to receive data I do this:
Bundle bundle2 = this.getArguments();
if(bundle2!=null){
String i = bundle2.getString(ClassicsB.Itemmm, "");
testButton.setText(i);
}
However the data is never being sent, when I check the value of testButton it's empty. Can you see what i am doing wrong? When I add item3 between the brackets it just takes the item3 as a string.
BTW this is communication between 2 fragments.

To Send the data, use the following lines of code:
Bundle bundle = new Bundle();
bundle.putString("KEY", "VALUE");
// set Fragmentclass Arguments
Fragmentclass fragobj = new Fragmentclass();
fragobj.setArguments(bundle);
And in order to recieve a data use this:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
String strtext = getArguments().getString("KEY");
return inflater.inflate(R.layout.fragment, container, false);
}
Hope this helps.

Bundle getInt only return default value

I have a problem that is this code only return default value is -1. I tried to debug, it has value so i don't know why it alway return -1.
private static final String KEY_CATEGORY_ID = "category";
Bundle bundle = getArguments();
mCategoryId = bundle.getInt(KEY_CATEGORY_ID, -1);
This is my debug value:
bundle Bundle (id=830037735464)
Bundle[{category=2}]

In your activity setArguments in this way
mFragment = new MyFragment();
Bundle extras = this.getIntent().getExtras();
extras.putInt("category", 10);
mFragment.setArguments(extras);
mFragmentTransaction = getSupportFragmentManager().beginTransaction();
mFragmentTransaction.add(R.id.profile_fragment, mFragment);
mFragmentTransaction.commit();
In fragment get it in this way
Bundle bundle = getArguments();
catgory = bundle.getInt("category");