Android聊天背景功能实现

解决输入法弹出时背景被顶上去或者挤压变形的问题

先看效果图：

Screenshot_1510219375.png

Screenshot_1510219378.png

实现方案：

package com.qiangqiang.chatback.views;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.ScrollView;

/**
 * Created by qiangqiang on 2017/7/17 0017.
 */

public class NoScrollView extends ScrollView {
    public NoScrollView(Context context) {
        super(context);
    }

    public NoScrollView(Context context, AttributeSet attrs) {
        super(context, attrs);
    }

    public NoScrollView(Context context, AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
    }

    @Override
    public boolean onTouchEvent(MotionEvent ev) {
        return true;
    }
}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.qiangqiang.chatback.views.NoScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <ImageView
            android:id="@+id/img_back"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@mipmap/bg"
            android:scaleType="centerCrop" />
    </com.qiangqiang.chatback.views.NoScrollView>

    <EditText
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:layout_alignParentBottom="true"
        android:hint="输入你想输入的文字" />

</RelativeLayout>