I have 3 buttons in a fragment and I want to disable them from the main activity. I have tried to use the bundle option before replace() newfragment but it created other issues. Can a button in a fragment be casted to a main activity ? Something like this. I get the error cannot cast but my entries are incorrect.
RedUp = (ButtonControls) getFragmentManager().findFragmentById(R.id.btnRedUP);
Here is my main.xml this holds the fragment called rgb_controls
<FrameLayout
android:id="#+id/rgb_controls"
android:layout_width="390dp"
android:layout_height="match_parent"
android:layout_marginLeft="550dp"
android:layout_marginTop="10dp" >
</FrameLayout>
Here is the button in the fragment xml called button_controls.xml
<Button
android:id="#+id/btnRedUP"
android:layout_width="80dp"
android:layout_height="80dp"
android:layout_marginLeft="10dp"
android:layout_marginTop="80dp"
android:text="UP"
android:textSize="30dp" />
Here is the fragment actiivty
public class ButtonControls extends Fragment {
public Button RedUp, RedDn, GreenUp, GreenDn, BlueUp, BlueDn;
View view;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
view = inflater.inflate(R.layout.button_controls, container, false);
RedUp = (Button) view.findViewById(R.id.btnRedUP);
return view;
}
}
Fragment is added using the replace()
Fragment ButtonFragment = new ButtonControls();
ButtonFragment.setArguments(bundle);
FragmentManager fm = getSupportFragmentManager();
FragmentTransaction ft = fm.beginTransaction();
ft.replace(R.id.rgb_controls, ButtonFragment).addToBackStack(null).commit();
Something like this should do the thing:
ButtonControls fragment = (ButtonControls)
getFragmentManager().findFragmentById(R.id.rgb_controls);
fragment.setButtonsGone();
You have to actually implement this setButtonsGone method in ButtonControls. Something as:
public void setButtonsGone() {
RedUp.setVisibility(View.GONE);
RedDn.setVisibility(View.GONE);
GreenUp.setVisibility(View.GONE);
GreenDn.setVisibility(View.GONE);
BlueUp.setVisibility(View.GONE);
BlueDn.setVisibility(View.GONE);
}
Related
I'm trying to show an image below a button only after the button has been pressed. My problem is that the fragment is shown immediately when the app is started and not only after the button has been pressed.
public class MainActivity extends AppCompatActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
public void say_hello(View view){
Fragment fragment = new ExampleFragment();
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
transaction.replace(R.id.fragment2, fragment).commit();
}
}
public class ExampleFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
return inflater.inflate(R.layout.news_articles, container, false);
}
}
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:tools="http://schemas.android.com/tools"
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:orientation="vertical"
android:layout_height="fill_parent"
tools:context=".MainActivity">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center_horizontal|center_vertical"
android:text="PRESS THIS"
android:id = "#+id/test_button"
android:background="#drawable/test_button"
android:onClick="say_hello"
/>
<fragment
android:id="#+id/fragment2"
android:name="com.example.tic_tac_toe.ExampleFragment"
android:layout_width="match_parent"
android:layout_height="643dp" />
</LinearLayout>
<ImageView
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="#drawable/cool_dog">
</ImageView>
I'm guessing the fragment shows up when the app is started because of the name I give to the fragment in the XML, but the fragment needs a name otherwise I only get error. How do I get the fragment to display nothing before I have clicked the button?
Instead of using <fragment /> view in your xml, you can use Framelayout and add your fragment to this Framelayout on button click using the following code -
FragmentTransaction transaction = getFragmentManager().beginTransaction();
transaction.add(R.id.mainframe, fragment);
transaction.commit();
Where mainframe is the id of Framelayout.
You can try doing this
android.app.Fragment fragment = getActivity().getFragmentManager().findFragmentByTag("YOUR_FRAGMENT_TAG");
getActivity().getFragmentManager().beginTransaction().hide(fragment);
inside your click event.
I am now practicing on ViewPager and Fragments but I am facing an issue with replacing fragment to one another.
It is working well with swiping screen to move to another fragment, but I also wanted to try out if I can do this with a button too.
So I added a button, and tried to use FragmentManager's replace() method.
But what it actually does is not replacing the fragment but adding the fragment on the current fragment.
In a simple word, it overlaps.
Could not really find anything helpful for hours now, can anyone please help me with it?
Here is my code of the fragment that has the button:
public class MainActivity extends Fragment {
Fragment fragment;
FragmentManager fragmentManager;
FragmentTransaction fragmentTransaction;
Button buildButton;
private ViewPager viewPager;
public static Fragment newInstance(Context context) {
MainActivity mainActivity = new MainActivity();
return mainActivity;
}
#Nullable
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.main, null);
return root;
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
buildButton = (Button) getView().findViewById(R.id.buildButton);
buildButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
fragment = new SecondActivity();
fragmentManager = getActivity().getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.calendarActivity, fragment);
fragmentTransaction.addToBackStack(null);
fragmentTransaction.commit();
}
});
}
}
And this is the xml file of the fragment:
<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".MainActivity">
<fragment class="com.example.auclo.calendarpractice5.MainActivity"
android:id="#+id/calendarActivity"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<Button
android:id="#+id/buildButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="100dp"
android:layout_marginEnd="148dp"
android:layout_marginStart="148dp"
android:layout_marginTop="16dp"
android:text="Track"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toBottomOf="#+id/calendarView" />
</android.support.constraint.ConstraintLayout>
And this is the fragment that I want to replace to:
public class SecondActivity extends Fragment {
TextView textView;
public static Fragment newInstance(Context context) {
SecondActivity secondActivity = new SecondActivity();
return secondActivity;
}
#Nullable
#Override
public View onCreateView(#NonNull LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
ViewGroup root = (ViewGroup) inflater.inflate(R.layout.activity_second, null);
return root;
}
#Override
public void onActivityCreated(#Nullable Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
textView = getView().findViewById(R.id.textView);
}
}
And xml of the second fragment:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context=".SecondActivity">
<fragment class="com.example.auclo.calendarpractice5.SecondActivity"
android:id="#+id/secondActivity"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Pikachu"
android:textSize="18sp" />
</RelativeLayout>
I will really appreciate to any kind of help.
Thank you!
The issue is that you're replacing the element with ID calendarActivity with your new fragment. This element is inside the XML for your first fragment (I think, based on your post). So it's putting this fragment in your old fragment.
You'll need to instead use the id in R.layout.main that represents your first fragment. I usually use a framelayout for this. Then I have the activity replace that framelayout with a fragment in its onCreate().
To add the same visual effects, you have to add a animation to your fragmentTransaction
Exemple:
fragmentTransaction.setCuston(
R.anim.enter_from_right,
R.anim.exit_to_left);
See this answer for explanation on fragments animations
I have developed an app, in that I have a fragment transaction,
MainActivity contains Fragment View.
MainActivity have three Button on top of the screen, that remain same when we go this Activity to another Fragment, only MainActivity Fragment part change when we click out of three.
But, my problem is that when I move from the this MainActivity to Fragment when click on First-Button that is OK, but when I click on Second-Button, result is overwrite the screen with first Fragment to another Fragment.
it is in same Activity so , I can not remove Fragment through remove(fr).commit();
Because if I do that then it become non-clickable may be fragment remove so not response on click of next button.
overall result, It display both FirstFragment and NewFragment Screen , when i move to NewFragment how i remove the FirstFragment screen ?
In MainActivity three button have following code to change fragment :
Main Activity :
public class MasterActivity extends Activity {
ImageView imgOne, imgTwo, imgThree;
Fragment fr;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_master);
imgOne = (ImageView) findViewById(R.id.imgOne);
imgTwo = (ImageView) findViewById(R.id.imgTwo);
imgThree = (ImageView) findViewById(R.id.imgThree);
imgOne.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
fr = new FirstFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.addToBackStack(null);
//fragmentTransaction.remove(fr).commit();
//getFragmentManager().beginTransaction().remove(fr).commit();
fragmentTransaction.commit();
}
});
imgTwo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
// TODO Auto-generated method stub
fr = new SecondFragment();
FragmentManager fm = getFragmentManager();
FragmentTransaction fragmentTransaction = fm.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.addToBackStack(null);
//fragmentTransaction.remove(fr).commit();
// getFragmentManager().beginTransaction().remove(fr).commit();
fragmentTransaction.commit();
}
});
its xml file like following :
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#000000"
android:gravity="bottom"
android:weightSum="3" >
<ImageView
android:id="#+id/imgOne"
android:layout_width="0dp"
android:layout_height="27dp"
android:layout_gravity="center"
android:layout_weight="1"
android:src="#drawable/img1" />
<ImageView
android:id="#+id/imgTwo"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="#drawable/img2"/>
<ImageView
android:id="#+id/imgThree"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="#drawable/img3" />
</LinearLayout>
<fragment
android:id="#+id/fragment_place"
android:name="packagename.FirstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
<LinearLayout/>
<LinearLayout/>
First Fragment :
public class FirstFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View r = inflater.inflate(R.layout.first_fratgment, container, false);
return r;
}
}
Second Fragment :
public class SecondFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container, #Nullable Bundle savedInstanceState) {
View r = inflater.inflate(R.layout.second_fratgment, container, false);
return r;
}
}
But when click on one button Fragment button to another it display both first and second Fragment screens.
So how to resolve it and how to remove first view when second click?
I used this
fragmentTransaction.remove(fr).commit();
and this
getFragmentManager().beginTransaction().remove(fr).commit();
but it's not working.
Fragment declared in the layout are treated differently by Android. Replace
<fragment
android:id="#+id/fragment_place"
android:name="packagename.FirstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
with a FrameLayout, or a subclass of ViewGroup of your choice, and handle all the transactions programmatically. The rest looks good to me
Its better to use a viewGroup or a layout/FrameLayout instead of fragments (fragment navigations on button clicks in an Activity). Because fragments have their own lifecycle and fragment hold thier views or are not killed when you do fragment transition within an activity.
Although if you still want to go with fragment, first load a fragment of first button click and handle the click events of other two buttons by removing the fragment previously attached (Fragment attached to first button click).
This can be done by:
getSupportFragmentManager().beginTransaction().remove(YOUR_FIRST_FRAGMENT).commit();
and after this you can write a code to add fragment in this place,
getFragmentManager().beginTransaction().replace(YOUR_FIRST_FRAGMENT, new YourSecondButtonFragment()).commit(); and hence this can be done for your third button click too, just need to change the fragment attached to second button.
I hope this will help you.
Fragments that are hard coded in XML, cannot be replaced. Use the FramLayout as a fragment container instead.
in your XML replace
<fragment
android:id="#+id/fragment_place"
android:name="packagename.FirstFragment"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
<LinearLayout/>
with
<FrameLayout
android:id="#+id/contentFragment"
android:layout_width="match_parent"
android:layout_height="0px"
android:layout_weight="2" />
Now, Do follow the following code style to achieve your goal:
First set the onClickListeners to all the imageviews:
like: imgOne.setOnClickListener(this);
#Override
public void onClick(View v) {
Fragment fragment = null;
switch (v.getId()) {
case R.id.imgOne:
fragment = new Fragment1();
break;
case R.id.imgTwo:
fragment = new Fragment2();
break;
}
if (fragment != null) {
FragmentManager fm = getSupportFragmentManager();
fm.beginTransaction().replace(R.id.contentFragment, fragment).commit();
} else {
Log.e(LOG_TAG, "Error in fragment transaction.");
}
}
Hope this helps.
you can use: getSupportFragmentManager().beginTransaction().remove(fragment).commit();
Hope this will help.
Make necessary changes. Replace your activity and xml with this.
It should run solid if you do.
public class MasterActivity extends Activity {
ImageView imgOne, imgTwo, imgThree;
Fragment fr;
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_master);
imgOne = (ImageView) findViewById(R.id.imgOne);
imgTwo = (ImageView) findViewById(R.id.imgTwo);
imgThree = (ImageView) findViewById(R.id.imgThree);
getFragmentManager().beginTransaction().add(R.id.fragment_place, new FirstFragment()).commit();
imgOne.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
getFragmentManager().beginTransaction().replace(R.id.fragment_place, new FirstFragment()).commit();
}
});
imgTwo.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
getFragmentManager().beginTransaction().replace(R.id.fragment_place, new SecondFragment()).commit();
}
});
xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<LinearLayout
android:layout_width="match_parent"
android:layout_height="50dp"
android:background="#000000"
android:gravity="bottom"
android:weightSum="3" >
<ImageView
android:id="#+id/imgOne"
android:layout_width="0dp"
android:layout_height="27dp"
android:layout_gravity="center"
android:layout_weight="1"
android:src="#drawable/img1" />
<ImageView
android:id="#+id/imgTwo"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="#drawable/img2"/>
<ImageView
android:id="#+id/imgThree"
android:layout_width="0dp"
android:layout_gravity="center"
android:layout_height="27dp"
android:layout_weight="1"
android:src="#drawable/img3" />
</LinearLayout>
<FrameLayout
android:id="#+id/fragment_place"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="0.87"/>
<LinearLayout/>
<LinearLayout/>
when i move to NewFragment how i remove the first frament screen ?
well you can do that by hiding the old(first) Fragment source
getSupportFragmentManager().beginTransaction().hide(getSupportFragmentManager()
.findFragmentById(R.id.the_id_of_my_first_fragment));
you can also get him(the first fragment) back by the same approach source
getSupportFragmentManager().beginTransaction().show(getSupportFragmentManager()
.findFragmentById(R.id.the_id_of_my_first_fragment));
This approach buys flexibility and not re-changing your app's architecture, and logic, and also one line of work
im always late to a party (:
copy and pest code in your button click event.
fr = new FirstFragment();
fragmentManager = getSupportFragmentManager();
fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.replace(R.id.fragment_place, fr);
fragmentTransaction.commit();
this is completed work.
I wanna open fragment from my activity. The problem is that the fragment never appears.
This is the part of my activity:
btn_opciones.setOnValueChangedListener(new ToggleButton.OnValueChangedListener() {
#Override
public void onValueChanged(int position) {
if(position == 1){
OrdenarComplejosFragment ordenarComplejosFragment = new OrdenarComplejosFragment();
FragmentManager manager = getSupportFragmentManager();
FragmentTransaction ft = manager.beginTransaction();
ft.setCustomAnimations(R.anim.fade_in, R.anim.fade_out);
ft.add(ordenarComplejosFragment, null);
ft.commit();
}
}
});
And this is my fragment that I wanna open and show:
public class OrdenarComplejosFragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_ordenar_complejos, container, false);
}
#Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);
//do your stuff for your fragment here
}
}
The xml of the fragment above:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textAppearance="?android:attr/textAppearanceLarge"
android:text="HOLAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA"
android:id="#+id/textView35"
android:layout_gravity="center_horizontal" />
</LinearLayout>
I don't know why the fragment never show. The button works fine.
Try using a different "add" method. Using the one which takes in a view id indicates where the fragment should show up within the existing Activity's layout.
ft.add(R.id.fragment_frame, ordenarComplejosFragment);
Fragments are always housed within an Activity. If your activity doesn't provide a container/location for the fragment to show up, you'll need to re-think the layout or consider opening this new view with a separate Activity.
I want to change fragments textview from activity(not fragment class).How can I do it ? I am using this code:
public void startChat() {
FrameLayout layout = (FrameLayout)findViewById(R.id.container);
layout.setVisibility(View.VISIBLE);
FragmentManager fragmentManager = getSupportFragmentManager();
FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();
fragmentTransaction.add(R.id.container, new ConversationFragment());
fragmentTransaction.commit();
viewPager.setVisibility(View.GONE);
actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_STANDARD);
actionBar.setDisplayHomeAsUpEnabled(true);
TextView nameView=(TextView)findViewById(R.id.user_name);
nameView.setText("asd");
}
This code loads conversation_fragment.xml and wants change textview,but my app is crashing.
Here conversation_fragment.xml :
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
android:background="#878787" >
<TextView android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:text="dfgdfgdf"
android:textSize="20dp"
android:layout_centerInParent="true"
android:id="#+id/user_name"/>
<EditText
android:id="#+id/message"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
/>
<Button
android:text="Gönder"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:onClick="getFromUser"
android:layout_marginTop="40dp"
/>
</RelativeLayout>
You can either use findFragmentById to find your fragment and call a public method that changes the text
(ConversationFragment) getFragmentManager().findFragmentById(R.id.yourid);
or keep an instance of the class when you create it before you add it to the fragment manager
conv = new ConversationFragment()
fragmentTransaction.add(R.id.container, conv);
then just call the public method using conv or whatever you call it
EDIT:
you use a bundle to send in data to the fragment
Bundle b = new Bundle()
b.putString("text",data)
conv.setArguments(b);
then in your fragment get the arguments with getArguments() and pull the data from the bundle and use it however you need
You can make like this
public class ConversationFragment extends Fragment {
private TextView nameView;
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.conversation_fragment, null);
nameView = (TextView) view.findViewById(R.id.user_name);
}
public void setText(String yourText){
nameView.setText(yourText);
}
}
and in your activity call method setText()
ConversationFragment conv = new ConversationFragment();
conv.setText("asd");
With best regards.