Develop Reference

Why does my floating action button jumps to the top of the page when the app starts?

I have currently a problem with a recycler view and a floating action button in my android app. The button always jumps to the right top of the page when I start the app.
The RecyclerView and the Button are inside a fragment. Currently I am using a ConstraintLayout to say the Button should always appear at the right end of the screen. However, I also tried it with a RelativeLayout and CoordinatorLayout with anchor and gravity attributes. In Android Studio, the layout shows it correct, with the button at the bottom right side of the screen. As soon as I start the app on my phone, it appears on the top right side of the screen...
Layout preview:
When I start the app on my phone:
Here's my Code I am using right now for 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"
android:id="#+id/fragment_bucketlist"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:background="#color/colorPrimary">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_bucketList"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab_addToBucketList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
app:layout_constraintBottom_toBottomOf="parent"
app:layout_constraintRight_toRightOf="parent"/>
</android.support.constraint.ConstraintLayout>
Thanks in advance for helping!

Try using the recyclerview and fab button within a CoordinatorLayout.
The attribute app:layout_anchorGravity: will specify how an object should be positioned relative to an anchor, on both the X and Y axes, within its parent’s bounds.
<android.support.design.widget.CoordinatorLayout
android:id="#+id/fragment_bucketlist"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#color/colorPrimary">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_bucketList"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<android.support.design.widget.FloatingActionButton
android:id="#+id/floating_action_button"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="16dp"
android:scaleType="center"
android:src="#drawable/android_floating_action_button_icon"
app:layout_anchor="#id/rv_bucketList"
app:layout_anchorGravity="bottom|right|end"
app:borderWidth="1dp"
app:elevation="10dp" />
</android.support.design.widget.CoordinatorLayout>

I solved the problem using a RelativeLayout. There was a problem that the Floating Action Button always showed up on the bottom edge and "stucked" at the bottom navigation bar (HUAWEI devices). The attribute app:useCompatPadding="true" solved the issue.
Here is the updated code:
<?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"
android:id="#+id/fragment_bucketlist"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="#string/appbar_scrolling_view_behavior"
android:background="#color/colorPrimary">
<android.support.v7.widget.RecyclerView
android:id="#+id/rv_bucketList"
android:layout_width="match_parent"
android:layout_height="match_parent"/>
<android.support.design.widget.FloatingActionButton
android:id="#+id/fab_addToBucketList"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#drawable/ic_edit"
app:useCompatPadding="true"
android:layout_alignParentBottom="true"
android:layout_alignParentEnd="true" />
</RelativeLayout>

how can i make some item always in list?

I want to make a history message list when I click customAutoCompleteTextView, and
I using BastAdapter made the red circle part
but I have no idea how to make "Clear All" item what that is always visible
, BTW I don't want to add a new item in history's list.
How can I do??

try this:
<?xml version="1.0" encoding="utf-8"?><!-- File created by SkillsOn -->
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent">
<!--This could be anything that shows your Message list-->
<ListView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_alignParentTop="true"
android:layout_below="#+id/clearAll"/>
<!--This is clearAll button and is always visible-->
<Button
android:id="#+id/clearAll"
android:text="Clear all"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"/>
</RelativeLayout>

Activity goes below status bar when soft keyboard opened

I am developing android custom keyboard and faced this problem. I am using candidates view to show suggestions. But in some cases when I am trying to use keyboard in applications Layout is going under status bar.
I have attached two images of problem. In both screenshots with red rectangle I have marked problem and with green rectangle Keyboard layout.
I have done research about this and find that it can be caused if Candidate view is not created in right way, but I have implemented candidate view as shown in examples.This is an Image from Facebook messenger
In this image keyboard is overlapping messengers edit text layout too.
Here are my code snippets from SoftKeyboard where i am creating candidates view.`
#Override public View onCreateCandidatesView() {
mCandidateView = new CandidateView(this);
mCandidateView.setService(this);
mCandidateView.setOnTranslitModeChangedListener(this);
return mCandidateView;
}`
my keyboard xml file
<?xml version="1.0" encoding="utf-8"?>
<com.innorise.kitkeysarmenian.LatinKeyboardView
xmlns:android="http://schemas.android.com/apk/res/android"
android:id="#+id/keyboard"
android:layout_alignParentBottom="true"
android:layout_width="match_parent"
android:layout_height="50dp"
android:keyTextSize="18dp"
android:keyTextColor="#000"
android:background="#color/keyboardBackground"
android:keyPreviewLayout="#layout/preview"
android:popupLayout="#layout/keyboard_popup_layout"
android:drawingCacheQuality="high">
and here is my candidates view xml file`
<?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"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#android:color/white"
android:padding="5dp"
android:gravity="center">
<android.support.v7.widget.RecyclerView
android:layout_width="match_parent"
android:layout_height="30dp"
android:id="#+id/candidatesList"
android:orientation="horizontal"
app:layoutManager="android.support.v7.widget.LinearLayoutManager"
android:layout_centerVertical="true"
android:layout_toLeftOf="#+id/candidateSwitch"/>
<TextView
android:textSize="18sp"
android:visibility="gone"
android:text="Translit is off."
android:gravity="center"
android:id="#+id/translitModeisOff"
android:layout_toLeftOf="#+id/candidateSwitch"
android:layout_width="match_parent"
android:layout_height="30dp" />
<com.rm.rmswitch.RMSwitch
android:id="#+id/candidateSwitch"
app:switchDesign="slim"
app:switchBkgCheckedColor="#4ed736"
app:switchBkgNotCheckedColor="#cccccc"
android:layout_centerVertical="true"
android:layout_alignParentRight="true"
app:switchToggleCheckedColor="#aca2a2"
app:switchToggleNotCheckedColor="#aca2a2"
android:layout_width="50dp"
android:layout_height="35dp"/>
</RelativeLayout>

add this to your manifest :
<activity
android:name="activity.name"
android:windowSoftInputMode="adjustPan|adjustResize"/>

How can I have one unique button in multiple components of a layout in android?

So I have an xml that consists of a linear layout containing a Button and a TextView like this:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="100dp"
android:orientation="vertical">
<Button
android:id="#+id/btnCell"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="start"
android:paddingLeft="40dp"
android:text="Button"
android:textColor="#color/blueText" />
<View
android:height="wrap_content"
android:width="wrap_content"
android:background="#drawable/Test"/>
</LinearLayout>
And I want to use this same layout inside other layouts in a different xml. I need the same button at every time, so I reuse it by including it in the two layouts (both layouts are in the same xml, but ones is hidden):
First one
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/image"
/>
<include layout="#layout/buttonLayout"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
Second One:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/image"
/>
<include layout="#layout/buttonLayout"/>
<CheckBox
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
So I show the first layout and hide the second one at the beginning of the app , as the user moves within the interface, the layouts exchange so that the other one is shown and the first one hidden.
The thing is that I declare the Button in my java activity class like this:
btnCell = (Button) thirdView.findViewById(R.id.btnCell);
btnCell.setOnClickListener(this);
And implemented the listener.
#Override
public void onClick(View v) {
if (v == btnCell) {
System.out.println("entered if");
}
System.out.println("entered function");
}
The problem is that when I click the button when the first view is shown and the second hidden, the button works just fine, but when I unhide the second layout, hide the first one, and proceed to click the button, that should be the same as the first one but in a different layout, nothing happens. I searched and find out, that this happens because the id is assigned only to the button shown in the first layout because of view hierarchy, but not the one in the second layout. How can I make both buttons react to the same action, without declaring a new button in each layout but instead reusing it?

I have used this type of layout. you can create Id different for both and inflate that view and give different name so You can differentiate both thing.
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<ImageView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/image"
/>
<include android:id="+id/firstOne" layout="#layout/buttonLayout"/>
<EditText
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>
android second one is
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:visibility="gone"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<EditText
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#drawable/image"
/>
<include android:id="+id/secondTwo" layout="#layout/buttonLayout"/>
<CheckBox
android:layout_width="match_parent"
android:layout_height="wrap_content" />
</LinearLayout>

The Problem is both the layout are include in same layout file and the id of that
button are same so whenever you click on any of the button at the same time event will fire on both button like both are clicked.
So, you have to give the different id for both the button I hope it works fine..

You can add a different Id for each included layout:
<include android:id="+id/layout_a" layout="#layout/buttonLayout"/>
and
<include android:id="+id/layout_b" layout="#layout/buttonLayout"/>
and then use two findViewById to reach them:
btnCellA = (Button)thirdView.findViewById(R.id.layout_a).findViewById(R.id.btnCell);
btnCellB = (Button)thirdView.findViewById(R.id.layout_b).findViewById(R.id.btnCell);

SearchView suggestions are showing over the widget

I'm using the searchview at the top of my activity positioned just below the action bar, the problem is that the suggestions are displayed over the searchview so the user cant see the typed the text
<?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.support.v7.widget.SearchView
android:id="#+id/fragment_map.searchView"
android:layout_width="match_parent"
android:layout_height="wrap_content">
</android.support.v7.widget.SearchView>
<RelativeLayout
android:layout_below="#id/fragment_map.searchView"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="#+id/map_container">
<!-- The map fragments will go here -->
</RelativeLayout>
</RelativeLayout>

no clue what the official answer even means. a work colleague aided me and I wanted to show how this can be achieved:
it can be done programatically by getting the textview as an AutoCompleteTextview:
imagine you have a searchview in xml like this:
<android.support.v7.widget.SearchView
android:id="#+id/searchView"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginLeft="0dp"
android:layout_marginRight="10dp"
android:animateLayoutChanges="true"
android:paddingLeft="0dp"
app:closeIcon="#drawable/close_x_icon"
app:queryBackground="#drawable/search_bg_expanded"
app:searchHintIcon="#drawable/empty_drawable"
app:searchIcon="#null" />
then in code do this:
val searchText = searchView.findViewById<TextView>(android.support.v7.appcompat.R.id.search_src_text) as? AutoCompleteTextView
searchText?.dropDownAnchor = searchView.id
so once you cast it to an AutocompleteTextView you can change the anchor basically.

fixed by adding this view to the bottom of the relativelayout and setting it to the anchor
<View android:id="#+id/fragment_map.dropDownAnchor"
android:layout_below="#id/fragment_map.searchView"
android:layout_width="match_parent"
android:layout_height="0dp" />