Develop Reference

Click arrow to reveal more content in application

i am trying to achieve a behavior where user click an arrow that can reveal more content such as more description abort something. It can a recycler view as well where more things can be added dynamically and the list will expand.Right now i do not have any idea how it can be achieved. I tried searching on the internet for solutions and saw a widget called spinner but i do not think it can help me achieve my desired behavior. YouTube does apply similar behavior as well
Below are the pictures which will make my question clear. Any help would be appreciated Thank You
Before clicking the arrow pic 1
After clicking the arrow pic 2

In your layout.xml include a nested layout that includes a Textview that holds the additional information and set android:visibility="gone". Use an OnClickListener to the button that is meant to expand the view. In the onClick method check if the view is visible or not. If it's not you make it visible, otherwise you set it to gone again.
layout:
...
<ImageView
android:id="#+id/chevron"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:src="#android:drawable/chevron"
/>
<TextView
android:id="#+id/textView"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="your additional info here"
android:visibility="gone"/>
...
In your Activity:
ImageView yourView = findViewById(R.id.chevron);
..
yourView.setOnClickListener(new View.OnClickListener() {
#Override
public void onClick(View view) {
if (view.getVisibility() == View.Gone) {
view.setVisibility(View.Visible);
} else {
view.setVisibility(View.Gone);
}
}
});

I used for this purpose ExpandbleLayout from this github library
ExpandableLayout. In readMe of the github repo you can find example of using it, you can get similar experience with as in your example, without need to manually create View for arrow and handling the animation.
You can use it like this :
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<com.github.aakira.expandablelayout.ExpandableRelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:ael_expanded="true"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent"
app:layout_constraintTop_toTopOf="parent">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Some text goes here"
android:textSize="28sp" />
</com.github.aakira.expandablelayout.ExpandableRelativeLayout>
And in your java/kotlin code : do additional logic to expand/collapse call : expandableLayout.toggle();.
All the credit goes to the author of the library.
https://github.com/AAkira/ExpandableLayout

ExoPlayer: Place controller under the video without overlapping the video

I have a PlayerView that takes up the top half of the Activity in portrait orientation with the bottom half of the screen showing some text.
I need to have the controller under the video without overlapping the video content (it will always be shown). By default when a user touches the video the controller appears at the bottom of the video covering the bottom part of the video. I my case I need the controller to stick under the video with no intersections with the video content.
I went through SimpleExoPlayer and PlayerView APIs but I haven't found any way to do so.
Question: How can I place the controller under the video with ExoPlayer?
Here is how the layout looks like:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<com.google.android.exoplayer2.ui.PlayerView
android:id="#+id/video_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"/>
<TextView
android:id="#+id/text"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentStart="true"
android:layout_below="#id/video_view"
android:scrollbars="vertical" />
</RelativeLayout>

This will push the controls down to the bottom of the screen:
<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="match_parent">
<com.google.android.exoplayer2.ui.PlayerView
android:id="#+id/video_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:use_controller="false" />
<com.google.android.exoplayer2.ui.PlayerControlView
android:id="#+id/controls"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#id/video_view"
app:show_timeout="0" />
</RelativeLayout>
Then in Java:
PlayerView videoView = findViewById(R.id.video_view);
PlayerControlView controls = findViewById(R.id.controls);
controls.setPlayer(videoView.getPlayer());
Edit: Modified my answer to suggestion from #RashimiGautam

Refer to the answer by #Pierre.
Also to remove controller from above PlayerView, in that case, #id/video_view by writing player.showController(false) in java file.
You can also use app:use_controller:false in the xml.
So you will the only the video without controller on top. And link it to a new controller, in that case, #id/controls at the bottom of the video.

This might give you an idea, also have you tried to override the controls?
As an example, suppose we want our playback controls to consist of only a play/pause button positioned in the center of the view. We can achieve this by creating exo_playback_control_view.xml file in the application’s res/layout directory, containing:
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageButton android:id="#id/exo_play"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center"
android:background="#CC000000"
style="#style/ExoMediaButton.Play"/>
<ImageButton android:id="#id/exo_pause"
android:layout_width="100dp"
android:layout_height="100dp"
android:layout_gravity="center"
android:background="#CC000000"
style="#style/ExoMediaButton.Pause"/>
</FrameLayout>
Note that in the layout #id/exo_play and #id/exo_pause are standard ids defined by the ExoPlayer library. Use of standard ids is required so that child views can be identified, bound to the player and updated in an appropriate way. A full list of the standard ids for each view can be found in the Javadoc for PlaybackControlView and SimpleExoPlayerView. Use of each standard id is optional.
https://medium.com/google-exoplayer/customizing-exoplayers-ui-components-728cf55ee07a

Custom looking searchView android

I need to create a custom looking SearchView that opens when an ImageButton, that I already have in my MainActivity.xml, is pressed.
I would really appreciate if you could explain me how to do it, because all I could find on SO was either people not having a custom looking SearchView or having it permanently on their TitleBar which I do not have since I'm using the light.NoTitleBar theme.
This is what I would need it to look like, this is a design I made with photoshop:

You have mutliple ways to obtain what you are looking for in term of design.
A solution i use (wich may not be the best) is to put my EditText (your search field) in a FrameLayout, this way i can have a search button and delete text button overlapping my textView:
XML Example :
<FrameLayout
android:id="#+id/SearchTextInputLayout"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_gravity="center"
android:minWidth="100.0dp">
<EditText
android:id="#+id/SearchTextInput"
android:textColorHint="#layout/inputselector"
android:hint="Search terms here..."
android:textAppearance="?android:attr/textAppearanceMedium"
android:layout_width="match_parent"
android:layout_height="match_parent"
/>
<Button
android:id="#+id/ClearSearchButton"
android:layout_width="25dp"
android:layout_height="25dp"
android:layout_marginEnd="10dp"
android:layout_marginRight="10dp"
android:layout_gravity="end|center_vertical"
android:background="#android:drawable/ic_delete" />
</FrameLayout>

How do I make the foreground attribute for a button work below API 23?

I have two Buttons nested in a LinearLayout. Between these Buttons are two TextViews. In the Xml, I have set the foreground to an image for each of these Buttons.
It runs fine on my device for Api 23. But on other devices below Api 23, the foreground image does not display and instead results in a default white solid color. Is there any way to make these images show using foreground below Api 23?
We have tried FrameLayout but it does not do what we want it to do. Would ImageButtons be a better way to solve this issue?
One of the core functions of our app is that every time a user taps a Button, the size increases and the image stretches accordingly. This is done dynamically in code. If I were to use ImageButtons, I would need to set the layout parameters every time for height and width, rather than one line of code that sets the height.
Any tips would be appreciated!
EDIT: Code I am working with -
<?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"
android:weightSum="11"
android:background="#android:color/black">
<Button
android:layout_weight="5"
android:id="#+id/firstP"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:foreground="#drawable/icebutton"
android:scaleX="1"
android:scaleY="1"/>
<TextView
android:layout_weight="0.5"
android:id="#+id/firstPlayer"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:rotation="180"
android:textColor="#android:color/white"
android:background="#android:color/transparent"/>
<TextView
android:layout_weight="0.5"
android:id="#+id/secondPlayer"
android:gravity="center"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textColor="#android:color/white"
android:background="#android:color/transparent"/>
<Button
android:layout_weight="5"
android:id="#+id/secondP"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="bottom"
android:foreground="#drawable/firebutton"
android:scaleX="1"
android:scaleY="1"/>
</LinearLayout>

We found out that there were two issues causing the images to not be shown.
1. The size of the image file was too big, creating an outOfMemory error which in turn resulted in the buttons not displaying the images.
2. The foreground attribute does not work for API 22 and below.
Steps to solving these issues:
1. We reduced the size of the image files.
2. We replaced Button with ImageButton
3. In the XML file we removed the foreground attribute, added a black background, and added the image via the src attribute. The following is a snippet.
<ImageButton
android:layout_weight="5"
android:id="#+id/firstP"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_gravity="top"
android:src="#drawable/icebutton"
android:scaleType="fitXY"
android:background="#android:color/black"/>
We then had to change our code to dynamically adjust the height of the buttons to match the new image buttons with the help of this link by setting the LayoutParams:
how to change size of button dynamic in android
Now everything works perfectly!

Android application Responsive(Fit for all screen sizes)

I am developing an android application,That has a buttons and images.I need to make it responsive.If i use bigger devices like tablets,it displays the controls very small.And when i used in landscape mode,it displays half of the controls or items.How can i overcome this and make my application responsive to all devices.I attached one of my XML code below.
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_margin="10dp"
android:orientation="vertical"
>
<ImageView
android:id="#+id/imageView1"
android:layout_width="fill_parent"
android:layout_height="125dp"
android:layout_marginTop="50dp"
android:layout_weight="0.01"
android:adjustViewBounds="true"
>
</ImageView>
<LinearLayout
android:id="#+id/layButtonH"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_weight="0.01"
android:layout_marginTop="20dp"
android:gravity="center"
android:orientation="vertical" >
<Button
android:id="#+id/addnew"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" ADD NEW "
android:background="#drawable/button_shape"
android:textColor="#FFFFFF"/>
<Button
android:id="#+id/open"
android:background="#drawable/button_shape_cancel"
android:layout_marginTop="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" OPEN "
android:textColor="#FFFFFF" />
<Button
android:id="#+id/Register"
android:background="#drawable/button_shape_cancel"
android:layout_marginTop="30dp"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text=" LOGIN "
android:textColor="#FFFFFF" />
</LinearLayout>

You can start off with below mentioned resources. Making an app available for all screen sizes needs certain consideration while designing and developing the app.
You will have to work on your images to make them consistent with different screen sizes. This will solve the issue with very small controls in tablets.
Also, it looks like in landscape mode your widgets are going beyond the screen height. A quick solution would be to put the LinearLayout within a ScrollView so that it scrolls when in landscape and you see all of your controls. But ideal way would be to have different layouts for landscape and portrait modes.
If you use ScrolLView the code will look like:
<?xml version="1.0" encoding="utf-8"?>
<ScrollView
android:layout_height="match_parent"
android:layout_width="match_parent"
xmlns:android="http://schemas.android.com/apk/res/android">
<!-- Your remaining xml elements -->
</ScrollView>
Ref:
Design for multiple screens
Supporting different screen sizes
Supporting multiple screens

For responsive design take
1) Don't give hard code values like as 125dp rather than user wrap_content or match_parent property
2) Put images under res drawable as per resolution OS take images suited for its resolution, e.g for tablet design create drawable-sw600 folder under res and put tablet images under it.
3) Same for values->dimension create different dimens file with specific folder name. e.g values-sw600 which is used for tablet
4) Use ScrollView control for avoiding screen cutting in landscape mode.
For more details and guideline please visit http://developer.android.com/guide/practices/screens_support.html and http://developer.android.com/training/multiscreen/screendensities.html