仿微信多人音视频通话界面

工作中需要实现一个类似微信多人视频通话功能的界面,分别使用自定义viewgroup和自定义layoutManager的方式进行了实现。最终工作中采用了layoutManager,因为可以使用payload更新单个布局控件,效率更好。下面放出两种具体的实现效果代码。

1、使用自定义ViewGroup方式实现

下面是三个人通话时候的效果,其他的可以参考微信多人音视频通话界面。
仿微信多人音视频通话界面_第1张图片

package com.dnaer.android.telephone.widgets;

import android.content.Context;
import android.os.Build;
import android.support.annotation.RequiresApi;
import android.util.AttributeSet;
import android.util.DisplayMetrics;
import android.view.View;
import android.view.ViewGroup;
import android.view.WindowManager;

import com.anbetter.log.MLog;

public class MultiVideoChatLayout extends ViewGroup implements CommLayoutAdapter.OnDataChangedListener {

    private CommLayoutAdapter mCommLayoutAdapter;

    private int mScreenWidth;

    //人数为2,3,4状态下的宽高度
    private int mSizeModel1;

    //人数为5,6,7,8,9状态下的宽高度
    private int mSizeModel2;

    public MultiVideoChatLayout(Context context) {
        this(context, null);
    }

    public MultiVideoChatLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
    }

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

    @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
    public MultiVideoChatLayout(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
        super(context, attrs, defStyleAttr, defStyleRes);
        initialize(context);
    }

    private void initialize(Context context) {
        WindowManager wm = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE);
        DisplayMetrics metrics = new DisplayMetrics();
        wm.getDefaultDisplay().getMetrics(metrics);
        mScreenWidth = metrics.widthPixels;

        mSizeModel1 = mScreenWidth / 2;
        mSizeModel2 = mScreenWidth / 3;
    }

    @Override
    protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
        //宽度默认给屏幕的宽度,高度直接取宽度,形成一个正方形
        final int width = MeasureSpec.makeMeasureSpec(mScreenWidth, MeasureSpec.EXACTLY);
        final int height = MeasureSpec.makeMeasureSpec(mScreenWidth, MeasureSpec.EXACTLY);
        setMeasuredDimension(width, height);

        MLog.d("width: " + width + ", height:" + height);

        final int childWidth = MeasureSpec.makeMeasureSpec(mScreenWidth / 3, MeasureSpec.EXACTLY);
        final int childHeight = MeasureSpec.makeMeasureSpec(mScreenWidth / 3, MeasureSpec.EXACTLY);

        final int childWidth2 = MeasureSpec.makeMeasureSpec(mScreenWidth / 2, MeasureSpec.EXACTLY);
        final int childHeight2 = MeasureSpec.makeMeasureSpec(mScreenWidth / 2, MeasureSpec.EXACTLY);

        if (getChildCount() > 4) {
            for (int i = 0; i < getChildCount(); i++) {
                View child = getChildAt(i);
                child.measure(childWidth, childHeight);
            }
        } else {
            for (int i = 0; i < getChildCount(); i++) {
                View child = getChildAt(i);
                child.measure(childWidth2, childHeight2);
            }
        }
    }

    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        if (getChildCount() <= 4) {
            layoutModel1();
        } else {
            layoutModel2();
        }
    }

    private void layoutModel2() {
        int currentWidth = 0;
        for (int i = 0; i < getChildCount(); i++) {
            View item = getChildAt(i);
            if (i % 3 == 0) {
                currentWidth = 0;
                item.layout(0, i / 3 * mSizeModel2, mSizeModel2, i / 3 * mSizeModel2 + mSizeModel2);
            } else {
                item.layout(currentWidth + mSizeModel2, i / 3 * mSizeModel2, currentWidth + 2 * mSizeModel2, i / 3 * mSizeModel2 + mSizeModel2);
                currentWidth = currentWidth + mSizeModel2;
            }
        }
    }

    private void layoutModel1() {
        if (getChildCount() == 3) {
            for (int i = 0; i < getChildCount(); i++) {
                View item = getChildAt(i);
                MLog.d("width: " + item.getMeasuredWidth() + ", height: " + item.getMeasuredHeight() + ", mSizeModel1: " + mSizeModel1);
                if (i == 0) {
                    item.layout(0, 0, mSizeModel1, mSizeModel1);
                } else if (i == 1) {
                    item.layout(mSizeModel1, 0, mSizeModel1 * 2, mSizeModel1);
                } else if (i == 2) {
                    item.layout(mSizeModel1 / 2, mSizeModel1, mSizeModel1 + mSizeModel1 / 2, mSizeModel1 * 2);
                }
            }
        } else {
            for (int i = 0; i < getChildCount(); i++) {
                View item = getChildAt(i);
                if (i % 2 == 0) {
                    item.layout(0, i / 2 * mSizeModel1, mSizeModel1, i / 2 * mSizeModel1 + mSizeModel1);
                } else {
                    item.layout(mSizeModel1, i / 2 * mSizeModel1, 2 * mSizeModel1, i / 2 * mSizeModel1 + mSizeModel1);
                }
            }
        }
    }

    public void setAdapter(CommLayoutAdapter adapter) {
        mCommLayoutAdapter = adapter;
        mCommLayoutAdapter.setOnDataChangedListener(this);
        changedAdapter();
    }

    @Override
    public void onChanged() {
        changedAdapter();
    }

    private void changedAdapter() {
        removeAllViews();
        CommLayoutAdapter layoutAdapter = mCommLayoutAdapter;
        for (int i = 0; i < layoutAdapter.getCount(); i++) {
            View view = layoutAdapter.getView(this, i, layoutAdapter.getItem(i));
            view.setDuplicateParentStateEnabled(true);
            addView(view);
        }
    }
}

2、使用自定义LayoutManager方式实现

package org.fireking.customgridlayoutmanager

import android.content.res.Resources
import android.support.v7.widget.RecyclerView
import java.lang.IllegalArgumentException

class MultiChatLayoutManager : RecyclerView.LayoutManager() {

    private var leftMargin = 0
    private var rightMargin = 0
    private var mScreenWidth = 0

    override fun generateDefaultLayoutParams(): RecyclerView.LayoutParams {
        return RecyclerView.LayoutParams(RecyclerView.LayoutParams.WRAP_CONTENT, RecyclerView.LayoutParams.WRAP_CONTENT)
    }

    override fun onLayoutChildren(recycler: RecyclerView.Recycler?, state: RecyclerView.State?) {
        super.onLayoutChildren(recycler, state)
        if (itemCount == 0) {
            detachAndScrapAttachedViews(recycler!!)
            return
        }
        if (childCount == 0 && state!!.isPreLayout) {
            return
        }
        val params = recycler!!.getViewForPosition(0).layoutParams as RecyclerView.LayoutParams
        leftMargin = params.leftMargin
        rightMargin = params.rightMargin
        detachAndScrapAttachedViews(recycler)
        layoutItem(recycler)
    }

    private fun layoutItem(recycler: RecyclerView.Recycler) {

        if (itemCount > 9) {
            throw IllegalArgumentException("${javaClass.simpleName}最多支持9个item布局, 请检查你的item个数是否正确")
        }

        mScreenWidth = Resources.getSystem().displayMetrics.widthPixels

        val itemSize = if (itemCount > 4) {
            mScreenWidth / 3
        } else {
            mScreenWidth / 2
        }

        if (itemCount <= 4) {
            if (itemCount == 3) {
                for (i in 0 until itemCount) {
                    val view = recycler.getViewForPosition(i)
                    addView(view) // 因为detach过所以重新添加
                    measureChildWithMargins(view, 0, 0)
                    when (i) {
                        0 -> layoutDecoratedWithMargins(view, 0, 0, itemSize, itemSize)
                        1 -> layoutDecoratedWithMargins(view, itemSize, 0, itemSize * 2, itemSize)
                        else -> layoutDecoratedWithMargins(
                            view,
                            itemSize / 2,
                            itemSize,
                            itemSize + itemSize / 2,
                            itemSize * 2
                        )
                    }
                }
            } else {
                for (i in 0 until itemCount) {
                    val view = recycler.getViewForPosition(i)
                    addView(view) // 因为detach过所以重新添加
                    measureChildWithMargins(view, 0, 0)
                    if (i % 2 == 0) {
                        layoutDecoratedWithMargins(view, 0, i / 2 * itemSize, itemSize, i / 2 * itemSize + itemSize)
                    } else {
                        layoutDecoratedWithMargins(
                            view,
                            itemSize,
                            i / 2 * itemSize,
                            2 * itemSize,
                            i / 2 * itemSize + itemSize
                        )
                    }
                }
            }
        } else {
            var currentWidth = 0
            for (i in 0 until itemCount) {
                val view = recycler.getViewForPosition(i)
                addView(view) // 因为detach过所以重新添加
                measureChildWithMargins(view, 0, 0)
                if (i % 3 == 0) {
                    currentWidth = 0
                    layoutDecoratedWithMargins(view, 0, i / 3 * itemSize, itemSize, i / 3 * itemSize + itemSize)
                } else {
                    layoutDecoratedWithMargins(
                        view,
                        currentWidth + itemSize,
                        i / 3 * itemSize,
                        currentWidth + 2 * itemSize,
                        i / 3 * itemSize + itemSize
                    )
                    currentWidth += itemSize
                }
            }
        }
    }

	//因为这个布局不需要有滚动,所以直接将横竖两个方向的滚动全部取消了
    override fun canScrollHorizontally(): Boolean {
        return false
    }

    override fun canScrollVertically(): Boolean {
        return false
    }
}

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