I've been developing an app on Android 5.1.1, and everything works fine. But when I test it on a 4.0.4 device, none of the buttons display any text. Any idea why this would be?
Each button is the UI of a fragment. This is the layout, named just_a_button.xml:
<?xml version="1.0" encoding="utf-8"?>
<Button xmlns:android="http://schemas.android.com/apk/res/android"
style="#style/button_copper"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#fff"
android:visibility="gone"/>
This is an example of how the fragments set up their views:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final Button button = (Button) inflater.inflate(R.layout.just_a_button, container, false);
button.setText(R.string.member_info);
// set click listener omitted
return button;
}
The button's visibility is controlled by an event receiver. The button is shown as expected, and its click listener works. There's just no text on it.
Edit: The solution was to put the button inside a layout. I'm still curious if this requirement was ever documented, and why only the text seems to be affected when the button is the root view.
Instead of this
button.setText(R.string.member_info);
use
button.setText(getActivity().getResources().getString(R.string.member_info));
You are directly defining string resource, but setText() takes string as parameter.
Edit:
change you xml like below and then findviewbyid for your button
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<Button
android:id="#+id/Mybutton"
style="#style/button_copper"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#fff"
android:visibility="gone"/>
</LinearLayout>
In your fragment onCreateView() do as below :
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.just_a_button, container, false);
Button button = (Button) view.findViewById(R.id.Mybutton);
button.setText(getActivity().getResources().getString(R.string.member_info));
// set click listener omitted
return view;
}
Related
I'd like to be able to set a View.OnclickListener to an ImageView inside a page (fragment) of my ViewPager, I don't want to click on the whole page of my ViewPager, I just want to be able to click on a specifig ImageView. I followed these questions (onClick not triggered on LinearLayout with child, How to set OnClickListener in ViewPager
) but they did not help me. This is my actual code:
MyPageFragment.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="240dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:focusableInTouchMode="true"
android:id="#+id/container_linear"
android:gravity="center"
android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop" />
</LinearLayout>
</LinearLayout>
MyActivity.xml
<android.support.v4.view.ViewPager
android:id="#+id/product_view_pager"
android:layout_width="match_parent"
android:layout_height="240dp"
android:layout_marginLeft="4dp"
android:layout_marginRight="4dp"
android:gravity="center"
android:overScrollMode="never" />
MyFragment.class (where I'm binding the views using Butterknife)
#BindView(R.id.container_linear)
LinearLayout mContainer;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container,
#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View mRootView = inflater.inflate(R.layout.my_layout, container, false);
ButterKnife.bind(this, mRootView);
mContainer.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d("Test", "Clicked!");
}
});
}
Thanks for your support.
One thing to consider would be moving your OnClickListener to the parent LinearLayout you're setting as clickable and seeing if that helps.
Another thing is adding android:focusableInTouchMode="true" to the view you're attaching your OnClickListener to.
Other than that, you might want to share the code for registering the OnClickListener so we can investigate other possible errors.
If I understand correctly you want to click on the image view insideMyPageFragment.xml. This is simple but you need to give ID to the ImageView and refer it in your onCreateView method like you do for LinearLayout and then use onClickListener on that image.
So with recent conversation it seems that in linear layout you need to remove line clickable="false"
Basically that has blocked all the clicks on its children, thus that linear layout as well as the imageview clicks are not working for you. See this code I removed that line. Hope this works
Follow this code.
MyPageFragment.xml
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:duplicateParentState="true"
android:orientation="vertical">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="240dp"
android:layout_marginLeft="16dp"
android:layout_marginRight="16dp"
android:focusableInTouchMode="true"
android:id="#+id/container_linear"
android:gravity="center"
android:orientation="vertical">
<--you need to give ID to the view to be able to
perform events on them specifically.-->
<ImageView
android:id="#+id/my_awesome_image"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:scaleType="centerCrop" />
</LinearLayout>
Now in your MyFragment.class
#BindView(R.id.container_linear)
LinearLayout mContainer;
//declare with butterknife
#BindView(R.id.my_awesome_image)
ImageView myAwesomeImage;
#Override
public View onCreateView(LayoutInflater inflater, #Nullable ViewGroup container,
#Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
View mRootView = inflater.inflate(R.layout.my_layout, container, false);
ButterKnife.bind(this, mRootView);
//you set click listener previously on entire linear layout instead of imageview
//that's why it was not reflecting on imageview click.
myAwesomeImage.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View v) {
Log.d(TAG , "Awesome Imageview clicked!");
}
});
}
I solved this issue using the following chunk of code:
#Override
public void onViewCreated(View view, Bundle savedInstanceState){
view.setOnClickListener(new OnClickListener(){
public void onClick(View v){
/* Do as you please here. */
}
});
}
The reference for this answer can be viewed here: How to detect click on ImageView in ViewPager's PagerAdapter (android)?
I have a view pager consisting of 4 tabs. Each tab holds its own fragment.
How would I be able to use fragment transaction to replace the fragment in tab 3 with a new fragment?
I've tried a lot of things, but I have not been able to come up with a solution at all. I've tried looking around on google and stackoverflow, but with no success.
I assume that your fragment has a button that is put in the center. By clicking on it, you can change the layout stays under of this button. The content/layout of the first fragment you mentioned should be replaced with wrapperA and the content/layout of the second one should be replaced with wrapperB. I put a simple red background for wrapperA to distinguish it with wrapperB, wrapperB is also green due to the same reason. I hope this is what you want:
public class SwitchingFragment extends Fragment {
Button switchFragsButton;
RelativeLayout wrapperA, wrapperB;
View rootView;
#Override
public View onCreateView(LayoutInflater inflater, final ViewGroup container, Bundle savedInstanceState) {
rootView = inflater.inflate(R.layout.layout_switch, container, false);
wrapperA = (RelativeLayout) rootView.findViewById(R.id.wrapperA);
wrapperB = (RelativeLayout) rootView.findViewById(R.id.wrapperB);
switchFragsButton = (Button) rootView.findViewById(R.id.switchFragsButton);
switchFragsButton.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View arg0) {
if (wrapperB.getVisibility() == View.GONE) {
wrapperB.setVisibility(View.VISIBLE);
// There is no need to change visibility of wrapperA since it stays behind when wrapperB is visible.
// wrapperA.setVisibility(View.GONE);
}
else {
wrapperB.setVisibility(View.GONE);
// Again, there is no need.
// wrapperA.setVisibility(View.VISIBLE);
}
}
});
return rootView;
}
}
The layout:
<?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:layout_gravity="center"
android:orientation="vertical">
<!-- The content of first fragment should be in "wrapperA". -->
<RelativeLayout
android:id="#+id/wrapperA"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/red"
android:visibility="visible">
</RelativeLayout>
<!-- The content of second fragment should be in "wrapperB". -->
<RelativeLayout
android:id="#+id/wrapperB"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/green"
android:visibility="gone">
</RelativeLayout>
<!-- As I said, I assume that the layout switcher button is stable
and so it should be in front of the switching layouts. -->
<Button
android:id="#+id/switchFragsButton"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:layout_centerVertical="true"
android:background="#color/black"
android:text="Switch"
android:textSize="20sp"
android:textStyle="bold"
android:textColor="#color/white"/>
</RelativeLayout>
Alternatively, you can try to change the fragment directly by notifying your FragmentPagerAdapter as described in this link:
Replace fragment with another fragment inside ViewPager
I've defined the following TextView:
<TextView
android:id="#+id/card12"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="center"
android:gravity="center"
android:layout_margin="15dp"
android:padding="15dp"
android:background="#drawable/selector_card_background"
android:text="Go to Google"/>
And I'd like to open a webpage when clicking the TextView (which shows a text instead of the full url)
I've read a lot about this, but all the thing I've tried doesn't work for me. I've tried writing android:autoLink="web" and view.setMovementMethod(LinkMovementMethod.getInstance()); but this doesn't make the TextView clickable. I also tried via intent but for this I'd have to use Button instead of TextView.
Also say that I'm not using Activity, I'm using Fragment:
public class InformationFragment extends Fragment {
public InformationFragment(){}
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View rootView = inflater.inflate(R.layout.information_layout, container, false);
return rootView;
}
}
Any ideas about how to do this? Thank you so much.
Try this:
TextView link = (TextView)findViewById(R.id.card12);
link.setText(Html.fromHtml("Go to Google"));
link.setMovementMethod(LinkMovementMethod.getInstance());
There is Button in Activity when we click on Button fragment's view overlaps Activity's view .
When Button is clicked it is forwarded to Fragment. Problem is it overlaps with Button.
In MainActivity i have created Button and set listener on that when user click on Button it is forwarded to fragment file which contain only textview.
MainActivity.java:
public class MainActivity extends FragmentActivity {
#Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Button button = (Button) findViewById(R.id.button1);
button.setOnClickListener(new OnClickListener() {
#Override
public void onClick(View v) {
fragment fr = new fragment();
getSupportFragmentManager().beginTransaction().add(R.id.parent_frame, fr).commit();
}
});
}
}
fragment.java
public class fragment extends Fragment {
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.fragment, container, false);
return view;
}
}
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">
<TextView
android:id="#+id/detailsText"
android:layout_width="fill_parent"
android:layout_height="match_parent"
android:text="Default Text ggggggg"
android:textAppearance="?android:attr/textAppearanceLarge"
android:textSize="30dip" />
</RelativeLayout>
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/container"
android:layout_width="match_parent"
android:layout_height="match_parent" >
<Button
android:id="#+id/button1"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Press to update"
/>
<fragment
class="com.example.demo3.fragment"
android:id="#+id/parent_frame"
android:layout_alignParentTop="true"
android:layout_width="fill_parent"
android:layout_height="fill_parent" />
</RelativeLayout>
Why aren't you using the Activity merely as a container, and use Fragments for ALL ui elements, including the button you are clicking to change between them?
Something like this: Programatically switching between Fragments
this is unique thought and i appreciate it.if you want to do this just follow below steps:
1) in your activity main take framelayout with height width system fit(matchparent) and id is parent_frame
2) take button inside it and when you click on it set button visible to gone
3) then you can add fragment to this framlayout
Make sure in your activity_main must contain framlayout with matchparent
How can I add a simple static header to my listview inside a listFragment? I want to create the header from an xml def and add it through inflation.
My onCreateView:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View detailList = inflater.inflate(R.layout.detail_fragment, container, false);
View detailListHeader = inflater.inflate(R.layout.daily_sales_header, null, false);
container.addView(detailListHeader, 0);
return detailList;
}
This creates the header, but it is not above the listview, rather the listview appears underneath the header, ie the header is overlaying the listview.
Any hints on the correct implementation?
Putting hackbod's description into code for you since his answer created more questions before the answers came. Sometimes I just want the fish. I don't always need to know how the net is made...
To start with, create a layout that looks like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/myListViewWithHeader"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/header"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:padding="6dp"
android:textStyle="bold"
android:textSize="20sp" />
<ListView
android:id="#android:id/list"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:drawSelectorOnTop="false" />
<TextView
android:id="#android:id/empty"
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Then, in your onCreateView method you do this:
#Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
View view = inflater.inflate(R.layout.myListViewWithHeader, null);
return view;
}
The header can now be populated by doing this:
// get the header view
TextView headerView = (TextView) getView().findViewById(R.id.header);
headerView.setText("Header text goes here");
Notice that my header is a TextView, but it can be replaced with another view if you like. In that case you will need to do a getView().findViewById(R.id.xxxxx) for each view inside the header you want to work with
You should NEVER EVER be adding views directly to the container in onCreateView(). Please read the documentation: http://developer.android.com/reference/android/app/Fragment.html#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
Also see the various sample code in the Fragment documentation, as well as the API demos: http://developer.android.com/resources/samples/ApiDemos/src/com/example/android/apis/app/index.html
There is nothing special about using a Fragment here. Just build a view hierarchy containing a ListView like you normally would in an Activity or elsewhere. You always need to return one View from onCreateView; this is the root of your hierarchy.
For example you could make the ListView and then use this to add a header to it: http://developer.android.com/reference/android/widget/ListView.html#addHeaderView(android.view.View)