详解Android 裸眼3D效果View控件

描述：这是一个裸眼3D效果的控件View。
Tips:本项目代码部分逻辑参考于其他文章（自如的3D裸眼实现），众人拾柴火焰高，希望大家能多多补充。

项目代码：https://gitee.com/jiugeishere/uidesign

控件效果如下：

实现功能：

1. 实现三层图片叠加效果（裸眼3D效果）
2. 可设置每层图片移动速率
3. 可设置每层图片移动的限制度数
4. 可直接设置图片或引入图片

设计核心：

主要的设计核心是依赖于传感器对手机晃动的监听（重力感应监听器），对每层图片进行不同的移动，实现仿3D效果。

核心代码：

SensorLayout 用以监听传感器

import android.content.Context;
import android.content.res.TypedArray;
import android.hardware.Sensor;
import android.hardware.SensorEvent;
import android.hardware.SensorEventListener;
import android.hardware.SensorManager;
import android.util.AttributeSet;
import android.widget.FrameLayout;
import android.widget.Scroller;

import androidx.annotation.IntDef;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;

import com.ui.design.R;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

/**
* 传感器监听
* author tangxianfeng
* created  2021.8.15
**/
public class SensorLayout extends FrameLayout implements SensorEventListener {
    private final SensorManager mSensorManager;
    private float[] mAccelerateValues;
    private float[] mMagneticValues;
    private final Scroller mScroller;
    private double mDegreeYMin = -50;//最小偏移度数  Y
    private double mDegreeYMax = 50;//最大偏移度数  Y
    private double mDegreeXMin = -50;//最小偏移度数  X
    private double mDegreeXMax = 50;//最大偏移度数  X
    private static final double MOVE_DISTANCE_X = 50;//X轴移动偏移量 实际偏移为MOVE_DISTANCE_X*acclerateratio
    private static final double MOVE_DISTANCE_Y = 50;//Y轴移动偏移量 实际偏移为MOVE_DISTANCE_Y*acclerateratio
    private float acclerateratio = 1;//偏移加速的倍率 可以通过设置此倍率改变偏移速度
    private final float[] values = new float[3];//包含 x,y,z的偏移量
    private final float[] Sensororientation = new float[9];//旋转矩阵

    public SensorLayout(@NonNull Context context) {
        this(context, null);
    }

    public SensorLayout(@NonNull Context context, @Nullable AttributeSet attrs) {
        this(context, attrs, 0);
    }

    public SensorLayout(@NonNull Context context, @Nullable AttributeSet attrs, int defStyleAttr) {
        super(context, attrs, defStyleAttr);
        mScroller = new Scroller(context);
        if (attrs != null) {
            TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.SensorLayoutStyle);
            acclerateratio = typedArray.getFloat(R.styleable.SensorLayoutStyle_AccelerateRatio, 1);
        }
        mSensorManager = (SensorManager) getContext().getSystemService(Context.SENSOR_SERVICE);
        if (mSensorManager != null) {
            Sensor accelerateSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);
            // 地磁场传感器
            Sensor magneticSensor = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD);
            mSensorManager.registerListener(this, accelerateSensor, SensorManager.SENSOR_DELAY_GAME);
            mSensorManager.registerListener(this, magneticSensor, SensorManager.SENSOR_DELAY_GAME);
        }
    }

    @Override
    public void onSensorChanged(SensorEvent event) {
        if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
            mAccelerateValues = event.values;
        }
        if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {
            mMagneticValues = event.values;
        }

        if (mMagneticValues != null && mAccelerateValues != null)
            SensorManager.getRotationMatrix(Sensororientation, null, mAccelerateValues, mMagneticValues);
        SensorManager.getOrientation(Sensororientation, values);
        // x轴的偏转角度
        double degreeX = (float) Math.toDegrees(values[1]);
        // y轴的偏转角度
        double degreeY = (float) Math.toDegrees(values[2]);
        int scrollX = mScroller.getFinalX();
        int scrollY = mScroller.getFinalY();
        if (degreeY <= 0 && degreeY > mDegreeYMin) {
            scrollX = (int) (degreeY / Math.abs(mDegreeYMin) * MOVE_DISTANCE_X * acclerateratio);
        } else if (degreeY > 0 && degreeY < mDegreeYMax) {
            scrollX = (int) (degreeY / Math.abs(mDegreeYMax) * MOVE_DISTANCE_X * acclerateratio);
        }
        if (degreeX <= 0 && degreeX > mDegreeXMin) {
            scrollY = (int) (degreeX / Math.abs(mDegreeXMin) * MOVE_DISTANCE_Y * acclerateratio);
        } else if (degreeX > 0 && degreeX < mDegreeXMax) {
            scrollY = (int) (degreeX / Math.abs(mDegreeXMax) * MOVE_DISTANCE_Y * acclerateratio);
        }
        smoothScroll(scrollX, scrollY);
    }

    @Override
    public void onAccuracyChanged(Sensor sensor, int accuracy) {

    }

    //移动
    public void smoothScroll(int destX, int destY) {
        int scrollY = getScrollY();
        int delta = destY - scrollY;
        mScroller.startScroll(destX, scrollY, 0, delta, 200);
        invalidate();
    }

    @Override
    public void computeScroll() {
        if (mScroller.computeScrollOffset()) {
            scrollTo(mScroller.getCurrX(), mScroller.getCurrY());
            postInvalidate();
        }
    }

    //解绑监听
    public void unregister() {
        mSensorManager.unregisterListener(this);
    }

    public void setDegree(double degreeYMin,double degreeYMax,double degreeXMin,double degreeXMax) {
        mDegreeYMin = degreeYMin;
        mDegreeYMax=degreeYMax;
        degreeXMax=degreeYMax;
        degreeXMin=degreeXMin;
    }

    public void setAcclerateratio(float acclerateratio) {
        this.acclerateratio = acclerateratio;
    }

    @IntDef({DIRECTION_LEFT, DIRECTION_RIGHT})
    @Retention(RetentionPolicy.SOURCE)
    @Target(ElementType.PARAMETER)
    public @interface ADirection {

    }

    public static final int DIRECTION_LEFT = 1;
    public static final int DIRECTION_RIGHT = -1;
}

Sensor3DView 三层视图封装

import android.content.Context;
import android.content.res.TypedArray;
import android.util.AttributeSet;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.ImageView;
import android.widget.LinearLayout;

import androidx.annotation.Nullable;

import com.bumptech.glide.Glide;
import com.ui.design.R;
/**
* author tangxianfeng
* created  2021.8.15
**/
public class Sensor3DView extends LinearLayout {

    private SensorLayout sensorforeground;//最上层传感器View
    private SensorLayout sensorbackground;//最底层传感器View
    private SensorLayout sensormid;//中间层传感器View

    private ImageView foregroundimg;//最上层图片
    private ImageView backgroundimg;//底层图片
    private ImageView midimg;//中间层图片

    private Context mContext;

    public Sensor3DView(Context context) {
        super(context);
        this.mContext = context;
    }

    public Sensor3DView(Context context, @Nullable AttributeSet attrs) {
        super(context, attrs);
        View inflate = LayoutInflater.from(getContext()).inflate(R.layout.sensor3d_item, this);
        this.mContext = context;
        initView(inflate);

        if (attrs != null) {
            TypedArray typedArray = context.obtainStyledAttributes(attrs, R.styleable.Sensor3DViewStyle);
            float forgroundacclerateratio = typedArray.getFloat(R.styleable.Sensor3DViewStyle_foregroundAccelerateRatio, 1);
            float backgroundacclerateratio = typedArray.getFloat(R.styleable.Sensor3DViewStyle_backgroundAccelerateRatio, 1);
            float midacclerateratio = typedArray.getFloat(R.styleable.Sensor3DViewStyle_midAccelerateRatio, 1);
            setAllImg(typedArray.getResourceId(R.styleable.Sensor3DViewStyle_backgrounddrawable,1),typedArray.getResourceId(R.styleable.Sensor3DViewStyle_middrawable,1),typedArray.getResourceId(R.styleable.Sensor3DViewStyle_foregrounddrawable,1));
            setAllratio(backgroundacclerateratio, midacclerateratio, forgroundacclerateratio);
        }
    }

    private void initView(View inflate) {
        sensorforeground = inflate.findViewById(R.id.sensorforeground);
        sensorbackground = inflate.findViewById(R.id.sensorbackground);
        sensormid = inflate.findViewById(R.id.sensormid);
        midimg = inflate.findViewById(R.id.midimg);
        backgroundimg = inflate.findViewById(R.id.backgroundimg);
        foregroundimg = inflate.findViewById(R.id.foregroundimg);
    }

    //加载三张图片
    public void setAllImg(Object backgroundurl, Object midurl, Object foregroundurl) {
        Glide.with(mContext).load(backgroundurl).into(backgroundimg);
        Glide.with(mContext).load(midurl).into(midimg);
        Glide.with(mContext).load(foregroundurl).into(foregroundimg);
    }

    //设置移动速度
    public void setAllratio(float backgroundratio, float midratio, float foregroundratio) {
        sensorbackground.setAcclerateratio(backgroundratio);
        sensormid.setAcclerateratio(midratio);
        sensorforeground.setAcclerateratio(foregroundratio);
    }

    //设置限制角度
    public void setDegree(float MinX,float MinY,float MaxX,float MaxY,View3DLayer layer){
        if (MinX>=MaxX||MinY>=MaxY){
            return;
        }
        switch (layer){
            case all:
                setDegree(MinY,MaxY,MinX,MaxX,sensorforeground);
                setDegree(MinY,MaxY,MinX,MaxX,sensormid);
                setDegree(MinY,MaxY,MinX,MaxX,sensorbackground);
                break;
            case mid:
                setDegree(MinY,MaxY,MinX,MaxX,sensormid);
                break;
            case background:
                setDegree(MinY,MaxY,MinX,MaxX,sensorbackground);
                break;
            case foreground:
                setDegree(MinY,MaxY,MinX,MaxX,sensorforeground);
                break;
        }
    }

    //sensorLayout 设置限制角度
    private void setDegree(float MinY,float MaxY,float MinX,float MaxX,SensorLayout sensorLayout){
        sensorLayout.setDegree(MinY,MaxY,MinX,MaxX);
    }
    @Override
    public void destroyDrawingCache() {
        super.destroyDrawingCache();
        sensorbackground.unregister();
        sensormid.unregister();
        sensorforeground.unregister();
    }
    public enum View3DLayer{
        foreground,
        background,
        mid,
        all
    }
}

styles.xml

<!--3D裸眼效果-->
    <declare-styleable name="SensorLayoutStyle">
        <attr name="AccelerateRatio" format="float" />
    </declare-styleable>

    <!--3D裸眼效果集合View-->
    <declare-styleable name="Sensor3DViewStyle">
        <attr name="foregroundAccelerateRatio" format="float" />
        <attr name="backgroundAccelerateRatio" format="float" />
        <attr name="midAccelerateRatio" format="float" />
        <attr name="foregrounddrawable" format="reference" />
        <attr name="backgrounddrawable" format="reference" />
        <attr name="middrawable" format="reference" />
    </declare-styleable>

使用示例：

直接引用到layout文件中便可，或者可通过代码设置其他属性。

 <com.ui.design.view.sensor3D.view.Sensor3DView
        android:id="@+id/sensor3Dview"
        android:layout_width="match_parent"
        android:layout_height="200dp"
        android:layout_centerInParent="true"
        app:foregrounddrawable="@drawable/forground3d"
        app:backgrounddrawable="@drawable/background3d"
        app:middrawable="@drawable/mid3d"
        app:foregroundAccelerateRatio="4.0"
        app:backgroundAccelerateRatio="-2.0"
        app:midAccelerateRatio="1.0"/>

项目代码仓库 UIDesign 开源项目

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