How to make a WhatsApp like `RecyclerView`?

Question

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!

Answer 1

您应该将您在RecyclerViewAdapter中使用的布局中的android：height更改为wrap_content

还有你的清单

<activity
        ...
        android:windowSoftInputMode="adjustPan"
        ...
></activity>

Answer 2

他们有很多库。This库是一个示例Android应用程序，可用作聊天应用程序的入门应用程序。您可以在项目中参考或实现此库

Answer 3

检查您的视图中使用的行项（布局xml文件）。我认为你在父视图中使用了match_parent。将其设为 wrap_content 。

对于滚动问题，请检查代码是否为smoothScrollToPosition（int）。可能是你在代码中使用过这种方法。