Android 多手势开发 (1-5指)

需求：多指手势功能性需求

1：双指操作:双指同时在屏幕左半侧向上或向下滑动为音量增加或减少 双指同时在屏幕右半侧向上或向下滑动为背光亮度增加或减少 双指同时在整个屏幕向左或向右滑动为切换上或下一曲 双指同时从左/右屏幕边缘往中间滑动打开左/右快捷应用栏

2：三指操作:三指从上往下滑进入导航功能 三指从下往上滑进入屏保 三指从左往右滑打开指定应用软件 三指从右往左滑返回主页

3：四指操作:长按30s自动上传log 四指下滑关闭屏幕

4：五指操作:五指长按20s进入触摸校正 

开发：

package com.emsm.app.gesture;

import android.content.Context;
import android.graphics.PointF;
import android.os.Handler;
import android.os.Message;
import android.view.MotionEvent;
import android.view.VelocityTracker;
import android.view.ViewConfiguration;

import androidx.annotation.NonNull;

import com.core.ex.LogHelps;
import com.core.ex.util.HandlerHelps;
        
/**
 * @Author chentao 0000668668
 * @Time 2023/6/15
 * @Description 多手势管理类 【支持1-5指长按，上下左右滑动区分】
 *
 */
public class MultiGestureManager {
    private IListener mListener;
    private FingerSplit mFingerSplit;
    private VelocityTracker mVelocityTracker;
    private int mMinimumFlingVelocity;
    private int mMaximumFlingVelocity;
    private int minVelocity = 50;

    public MultiGestureManager(Context context, IListener listener) {
        mListener = listener;
        mFingerSplit = new FingerSplit();
        if (context == null) {
            mMinimumFlingVelocity = ViewConfiguration.getMinimumFlingVelocity();
            mMaximumFlingVelocity = ViewConfiguration.getMaximumFlingVelocity();
        } else {
            final ViewConfiguration configuration = ViewConfiguration.get(context);
            mMinimumFlingVelocity = configuration.getScaledMinimumFlingVelocity();
            mMaximumFlingVelocity = configuration.getScaledMaximumFlingVelocity();
        }
    }

    private long[] mGingerLongClickTime;

    /**
     * 设置手指长按的时间
     *
     * @param delayMillis
     * @return
     */
    public MultiGestureManager setGingerLongClickTime(long... delayMillis) {
        if (delayMillis == null || delayMillis.length != 5) {
            new StringIndexOutOfBoundsException("delayMillis != null && delayMillis.length == 5");
        }
        mGingerLongClickTime = delayMillis;
        return this;
    }

    public boolean onTouchEvent(MotionEvent event) {
        if (event.getAction() == MotionEvent.ACTION_DOWN) {
            mListener.onDown(event);
        }

        final boolean multiFingerProcessed = mFingerSplit.onTouchEvent(event);

        if (event.getAction() == MotionEvent.ACTION_UP) {
            mListener.onUp(event);
        }
        return multiFingerProcessed;
    }

    public static final int SINGLE_GINGER = 1, SINGLE_GINGER_LONG_CLICK = SINGLE_GINGER;
    public static final int DOUBLE_GINGER = 2, DOUBLE_GINGER_LONG_CLICK = DOUBLE_GINGER;
    public static final int THREE_GINGER = 3, THREE_GINGER_LONG_CLICK = THREE_GINGER;
    public static final int FOUR_GINGER = 4, FOUR_GINGER_LONG_CLICK = FOUR_GINGER;
    public static final int FIVE_GINGER = 5, FIVE_GINGER_LONG_CLICK = FIVE_GINGER;

    private Handler mHandler = HandlerHelps.createHandler(new Handler.Callback() {

        @Override
        public boolean handleMessage(@NonNull Message msg) {
            switch (msg.what) {
                case SINGLE_GINGER_LONG_CLICK:
                    mListener.onLongPress(GestureEvent.SINGLE_GINGER_LONG_CLICK);
                    break;
                case DOUBLE_GINGER_LONG_CLICK:
                    mListener.onLongPress(GestureEvent.DOUBLE_GINGER_LONG_CLICK);
                    break;
                case THREE_GINGER_LONG_CLICK:
                    mListener.onLongPress(GestureEvent.THREE_GINGER_LONG_CLICK);
                    break;
                case FOUR_GINGER_LONG_CLICK:
                    mListener.onLongPress(GestureEvent.FOUR_GINGER_LONG_CLICK);
                    break;
                case FIVE_GINGER_LONG_CLICK:
                    mListener.onLongPress(GestureEvent.FIVE_GINGER_LONG_CLICK);
                    break;
            }
            return false;
        }
    });

    private class FingerSplit {
        private MotionEvent mStartMultiEvent;
        private MotionEvent mLastMultiEvent;
        private float mLastFocusX;
        private float mLastFocusY;
        private float mDownFocusX;
        private float mDownFocusY;

        private int mRecordMaxPointerCount;

        public boolean onTouchEvent(MotionEvent ev) {
            if (mVelocityTracker == null) {
                mVelocityTracker = VelocityTracker.obtain();
            }
            mVelocityTracker.addMovement(ev);

            boolean handled = false;
            float sumX = 0, sumY = 0;
            float focusX = 0, focusY = 0;

            mRecordMaxPointerCount = Math.max(mRecordMaxPointerCount, ev.getPointerCount());
            if (mRecordMaxPointerCount == ev.getPointerCount()) {
                for (int i = 0; i < mRecordMaxPointerCount; i++) {
                    sumX += ev.getX(i);
                    sumY += ev.getY(i);
                }
                focusX = sumX / mRecordMaxPointerCount;
                focusY = sumY / mRecordMaxPointerCount;
            }

            switch (ev.getAction() & MotionEvent.ACTION_MASK) {
                case MotionEvent.ACTION_DOWN:
                    LogHelps.i("ACTION_DOWN_recordMaxPointerCount:" + mRecordM