Develop Reference

How to make a WhatsApp like `RecyclerView`?

This may be possible of duplicate question i have tried all things none of it works i need to make whatsapp like chat model using RecyclerView and at the bottom EditText and a Button bottom my problem is i can have EditText and bottom at the bottom but i need scroll to view that EditText and Button, what i should have when user enter that page EditText and Buttonb should appear without scrolling and one more problem there is lots of space between two items in thatRecyclerView` how to reduce that space let me post what i did so far:
My Recyclerview ChatLayout:
<?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.support.v7.widget.RecyclerView
android:id="#+id/constraint_recyclerview"
android:layout_width="match_parent"
android:layout_height="wrap_content"
/>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal"
android:weightSum="4">
<EditText
android:id="#+id/message"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="1"
android:hint="Enter Message"
android:lines="1" />
<Button
android:id="#+id/btn_send"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_weight="3"
android:text="Send" />
</LinearLayout>
</RelativeLayout>
How to do this as am new for android development someone please help me!

You should change the android:height in layout that u use in your RecyclerViewAdapter to wrap_content
And also in your manifest
<activity
...
android:windowSoftInputMode="adjustPan"
...
></activity>

Their are many libraries out there.This library is a sample Android App which can be used as a starter application for a chat application.You can take reference or implemented this library in your project

check your row item(layout xml file) which is used in your viewholder. I think you have used match_parent in your parent view. Make it as wrap_content.
For that scrolling issue, check your code for smoothScrollToPosition(int). may be you have used this method in your code.

Forcing a layout to be a certain height

I am trying to make a layout simulating a Dialog.
I am inserting a ListFragment in my fragment container in this layout. I'm trying to accomplish two things:
Buttons always visible on the bottom of the layout
The layout does not take up the entire height of the screen.
But nothing I try seems to work.
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="400dp"
>
<FrameLayout
android:id="#+id/dialog_fragment_container"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/dialog_button_container"/>
<LinearLayout
android:id="#+id/dialog_button_container"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:orientation="horizontal">
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="#+id/button2"/>
<Button
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="New Button"
android:id="#+id/button3"/>
</LinearLayout>
</RelativeLayout>
It always wants to take up the entire height of my screen no matter what I do.

I dont exactly understand what you really want to do but I think the first thing to check out is PopupWindow. It pops up like a normal Dialog but you can completly customize its layout and of course the buttons too. You said you want to
"synthesize" it. Im sure it is not that hard to find the right dimens, fontsize and so on for the buttons. Mostly its all set to the default.

If you want your activity's layout to be look like dialog you can use following lines in your manifest file:
<activity
android:name="Your activity name"
android:theme="#android:style/Theme.Dialog" />

Android: ListView pushes out everything else below it

In my app, there is a tabbed activity with three fragments. The first fragment has a form to create a new task, the second fragment has the list of all the saved tasks, and the third fragment will show the comments on a task when selected from the list in the second fragment. The third fragment is also supposed to act like a chat activity which posts comments when you type them in and tap the send button. The XML layout of this third fragment is as follows:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/darker_gray"
android:orientation="vertical"
tools:context="com.example.ishita.assigntasks.CommentsFragment">
<TextView
android:id="#+id/frag_task_details"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#dd55ff"
android:padding="10dp" />
<ListView
android:id="#+id/frag_comment_list"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:transcriptMode="normal" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
android:background="#android:color/white">
<EditText
android:id="#+id/frag_msg_edit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:inputType="textMultiLine"
android:layout_weight="1" />
<ImageButton
android:id="#+id/frag_send_btn"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:background="#android:color/background_light"
android:contentDescription="#string/send_btn"
android:src="#android:drawable/ic_menu_send" />
</LinearLayout>
</LinearLayout>
As you can see, there is a TextView and a ListView and below that is another LinearLayout. Here is how it should look (the purple bar is the TextView):
And here is how it actually looks:
The TextView shows up above the ListView, but the LinearLayout does not. It is there, though. If I do android:layout_marginBottom="20dp" on the outermost LinearLayout, it does show up, but the ActionBar scrolls up and overlaps with the notification bar so that the title on the ActionBar and the notifications on the notification bar are both visible simultaneously and neither is legible.
I searched a lot and this seemed a common issue, but none of the solutions helped me. Believe me, I tried everything I could find. I tried wrapping the whole thing in a FrameLayout, using a RelativeLayout in place of the outermost LinearLayout, using two LinearLayouts--one to wrap the TextView and the ListView and the other to wrap the EditText and the ImageButton, etc., but nothing was able to show the bottom LinearLayout below the ListView. I even tried to set focus on the EditText when the fragment launches so that the keyboard would show and I can type, but even that doesn't help.
Note: On the other hand, if I use the exact same layout on an activity, the bottom LinearLayout displays exactly as it should.
I am unable to find the bug. Please help!

It looks like your toolbar pushes fragment layout down without decreasing its height. I have no idea why this happens (there are no root layout code here).
As a workaround you can set fragments layout bottom margin to ?attr/actionBarSize

As you have given layout_weight 1 in listview layout, so it occupies the whole space available. In order to get rid of you have to give some static height or use layout_weight in right manner
<ListView
android:id="#+id/frag_comment_list"
android:layout_width="match_parent"
android:layout_height="500dp"
android:transcriptMode="normal" />
or try like this
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#android:color/darker_gray"
android:orientation="vertical"
tools:context="com.example.ishita.assigntasks.CommentsFragment">
<TextView
android:id="#+id/frag_task_details"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="#dd55ff"
android:padding="10dp" />
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="vertical"
android:background="#android:color/white">
<ListView
android:id="#+id/frag_comment_list"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:transcriptMode="normal" />
</LinearLayout>
<LinearLayout
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"
android:orientation="horizontal"
android:background="#android:color/white">
<EditText
android:id="#+id/frag_msg_edit"
android:layout_width="0dp"
android:layout_height="wrap_content"
android:inputType="textMultiLine"
android:layout_weight="1" />
<ImageButton
android:id="#+id/frag_send_btn"
style="?android:attr/buttonStyleSmall"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_weight="0"
android:background="#android:color/background_light"
android:contentDescription="#string/send_btn"
android:src="#android:drawable/ic_menu_send" />
</LinearLayout>
</LinearLayout>

All,
Thank you for all your responses. I found a workaround by trial and error now and thought I should post the answer for others who face the same issue. I set android:layout_marginBottom="50dp" on the inner LinearLayout (the one wrapping the comments bar--EditText and ImageButton). Somehow, this sets the layout correctly and the fragment functions properly in both Lollipop and Jellybean OS's. I haven't tested on other OS versions.

First of all you should read this, what is layout_weight and how it works.
You assigned layout_weight to ListView as 1, it means it covers whole height. just change it to 0.7 or any proportion you want (less than 1) will solve the problem.
<ListView
android:id="#+id/frag_comment_list"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="0.7"
android:transcriptMode="normal" />

Android layout design: image above form above button. When the keyboard appears my layout is screwed

In my application I want to have a layout like this:
I did it with a Relative Layout holding an ImageView, TableLayout and a Button. The problem is that when I open the keyboard to modify a EditText the keyboard is on top of the EditText, so the user can't see what he is writing. I want the layout to be like this when the keyboard is shown:
The user should be able to scroll up the view to see the whole image while the keyboard is shown, even if he doesn't see the EditText then, because he wants to copy some data of the image into the EditTexts. I tried to do it like this:
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:baselineAligned="false"
android:orientation="vertical" >
<ScrollView
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_above="#+id/buttonEditStop"
android:padding="10dip" >
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="wrap_content" >
<ImageView
android:id="#+id/stopImg"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerHorizontal="true"
android:clickable="true"
android:contentDescription="#string/entry_img"
android:onClick="ImageClick" />
<TableLayout
android:id="#+id/formLayout"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_below="#+id/stopImg"
android:layout_marginRight="10dp" >
...
</TableLayout>
</RelativeLayout>
</ScrollView>
<ImageButton
android:id="#+id/buttonEditStop"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:layout_alignParentBottom="true"
android:layout_centerHorizontal="true"
android:contentDescription="#string/edit_stop"
android:onClick="EditButtonClicked"
android:src="#drawable/ic_menu_edit" />
Using this code my whole layout is screwed. I see the form on top of the image, followed by a ImageButton with the image that should be seen in the imageView.
Anyone knows how I can get a layout like the one I want?
Thanks!

To avoid the EditText to be overlapped I had to use
android:windowSoftInputMode="adjustPan"
in my manifest.

Soft-keyboard appears every time layout becomes visible

I have two layouts within a fragment that I switch back and forth between by making one invisible and the other visible and visa versa. When the layout that contains an EditText becomes visible the soft keyboard automatically pops up. I have used the following in the manifest but it didn't help.
android:windowSoftInputMode="stateUnchanged"
I never explicitly request focus on the EditText and have even tried requesting focus on something else to no avail.
<?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:id="#+id/container">
<LinearLayout android:id="#+id/dial_pad_ll"
android:layout_width="match_parent" android:layout_height="match_parent"
android:orientation="vertical" android:layout_centerInParent="true"
android:background="#1E1E1E" android:layout_marginLeft="20dp" android:layout_marginRight="20dp">
<EditText android:layout_height="wrap_content" android:id="#+id/search_et"
android:layout_width="match_parent" android:layout_alignParentTop="true"
android:layout_marginTop="20dp" android:layout_marginBottom="10dp" >
</EditText>
<!-- Other widgets here -->
</LinearLayout>
<!-- Other Layout Here -->
</RelativeLayout>
Anyone know how to prevent this? Thanks.
Edit: I should also have mentioned that this doesn't happen the first time. I open layout 1 with the edit text, make it invisible, make it visible again, then the keyboard pops up.

try adding this to your activity.
this.getWindow().setSoftInputMode(
WindowManager.LayoutParams.SOFT_INPUT_STATE_ALWAYS_HIDDEN);