Android 集成百度地图AR识别SDK（三）

废话

今天我们接着上一章的内容继续讲如何集成百度地图AR SDK

上一章我讲到了配置MyApplication，那么这一章我就讲如何显示AR目标点，废话不多说，直接上代码。

创建布局

activity_ar.xml

可以看到AR的布局比较简单，里面就是两个RelativeLayout，一个用于显示相机，一个用于显示POI点

创建完成之后我们还需创建一个FindArCamGLView，待会会用到

layout_find_camera_view.xml

创建Activity

public class ARActivity extends AppCompatActivity implements ArPageListener {

    private RelativeLayout mCameraLayout;

    private RelativeLayout mArPoiItemLayout;

    private FindArCamGLView mCameraGLView;

    private SimpleSensor mSensor;

    private List mPoiInfoList;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ar);
        fbv();
        init();
        event();
    }
}

我们先重写onCreate方法，在里面做一些初始化操作

fbv

private void fbv() {
    mCameraLayout = findViewById(R.id.ar_camera_layout);
    mArPoiItemLayout = findViewById(R.id.ar_poi_item_layout);
    mCameraGLView = (FindArCamGLView) LayoutInflater.from(this).inflate(R.layout.layout_find_camera_view, null);
}

这个获取控件

init

private void init() {
    initData();
    initCamera();
    initSensor();
}

初始化各个功能

initData

private void initData(){
    mPoiInfoList= new ArrayList<>();
    ArLatLng arLatLng=new ArLatLng(22.8750032283,113.8906799763);
    ArPoiInfo poiInfo=new ArPoiInfo();
    poiInfo.name="测试AR点";
    poiInfo.location=arLatLng;
    PoiInfoImpl poiImpl=new PoiInfoImpl();
    poiImpl.setPoiInfo(poiInfo);
    mPoiInfoList.add(poiImpl);
}

这个是初始化数据点，也就是你要显示的AR目标点

initCamera

private void initCamera() {
    mCameraGLView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
        @Override
        public void onLayoutChange(View view, int left, int top, int right, int bottom,
                                   int oldLeft, int oldTop, int oldRight, int oldBottom) {
            if (bottom == 0 || oldBottom == 0 || mCameraGLView == null) {
                return;
            }
            RelativeLayout.LayoutParams params = TypeUtils.safeCast(
                    mCameraGLView.getLayoutParams(), RelativeLayout.LayoutParams.class);
            if (params == null) {
                return;
            }
            params.height = bottom - top;
            mCameraGLView.requestLayout();
        }
    });
    mCameraLayout.addView(mCameraGLView);
}

这个是初始化相机

initSensor

private void initSensor() {
    if (mSensor == null) {
        mSensor = new SimpleSensor(this, new HoldPositionListenerImp());
    }
    mSensor.startSensor();
}

private class HoldPositionListenerImp implements SimpleSensor.OnHoldPositionListener {
    @Override
    public void onOrientationWithRemap(float[] remapValue) {
        if (mCameraGLView != null && mArPoiItemLayout != null) {
            if (mPoiInfoList.size() <= 0) {
                mArPoiItemLayout.setVisibility(View.GONE);
            } else {
                mCameraGLView.setFindArSensorState(remapValue, getLayoutInflater(),
                        mArPoiItemLayout, ARActivity.this, (ArrayList) mPoiInfoList, ARActivity.this);
                mArPoiItemLayout.setVisibility(View.VISIBLE);
            }
        }}
}

event

private void event() {
}

暂时不需要绑定事件，这个方法先空着

其他的方法

@Override
public void noPoiInScreen(boolean b) {
}
@Override
public void selectItem(Object o) {
}
private void finishCamInternal(){
    if (mCameraGLView != null) {
        mCameraGLView.stopCam();
        mCameraLayout.removeAllViews();
        mCameraGLView = null;
    }
    if (mArPoiItemLayout != null) {
        mArPoiItemLayout.removeAllViews();
    }
    if (mSensor != null) {
        mSensor.stopSensor();
    }
}
@Override
protected void onDestroy() {
    super.onDestroy();
    finishCamInternal();
}

finishCamInternal是销毁时调用的，移除视图，防止内存泄漏等问题
下面是ARActivity的全部源码

ARActivity.java

package com.yk.mchat.app.activity;

import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.RelativeLayout;

import com.yk.mchat.R;

import java.util.ArrayList;
import java.util.List;

import map.baidu.ar.ArPageListener;
import map.baidu.ar.camera.SimpleSensor;
import map.baidu.ar.camera.find.FindArCamGLView;
import map.baidu.ar.model.ArLatLng;
import map.baidu.ar.model.ArPoiInfo;
import map.baidu.ar.model.PoiInfoImpl;
import map.baidu.ar.utils.TypeUtils;

public class ARActivity extends AppCompatActivity implements ArPageListener {

    private RelativeLayout mCameraLayout;

    private RelativeLayout mArPoiItemLayout;

    private FindArCamGLView mCameraGLView;

    private SimpleSensor mSensor;

    private List mPoiInfoList;

    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_ar);
        fbv();
        init();
        event();
    }

    private void fbv() {
        mCameraLayout = findViewById(R.id.ar_camera_layout);
        mArPoiItemLayout = findViewById(R.id.ar_poi_item_layout);
        mCameraGLView = (FindArCamGLView) LayoutInflater.from(this).inflate(R.layout.layout_find_camera_view, null);
    }

    private void init() {
        initData();
        initCamera();
        initSensor();
    }

    private void initData(){
        mPoiInfoList= new ArrayList<>();

        ArLatLng arLatLng=new ArLatLng(22.8750032283,113.8906799763);
        ArPoiInfo poiInfo=new ArPoiInfo();
        poiInfo.name="测试AR点";
        poiInfo.location=arLatLng;

        PoiInfoImpl poiImpl=new PoiInfoImpl();
        poiImpl.setPoiInfo(poiInfo);

        mPoiInfoList.add(poiImpl);
    }

    private void initCamera() {
        mCameraGLView.addOnLayoutChangeListener(new View.OnLayoutChangeListener() {
            @Override
            public void onLayoutChange(View view, int left, int top, int right, int bottom,
                                       int oldLeft, int oldTop, int oldRight, int oldBottom) {
                if (bottom == 0 || oldBottom == 0 || mCameraGLView == null) {
                    return;
                }
                RelativeLayout.LayoutParams params = TypeUtils.safeCast(
                        mCameraGLView.getLayoutParams(), RelativeLayout.LayoutParams.class);
                if (params == null) {
                    return;
                }
                params.height = bottom - top;
                mCameraGLView.requestLayout();
            }
        });
        mCameraLayout.addView(mCameraGLView);
    }

    private void initSensor() {
        if (mSensor == null) {
            mSensor = new SimpleSensor(this, new HoldPositionListenerImp());
        }
        mSensor.startSensor();
    }

    private void event() {

    }

    private class HoldPositionListenerImp implements SimpleSensor.OnHoldPositionListener {

        @Override
        public void onOrientationWithRemap(float[] remapValue) {
            if (mCameraGLView != null && mArPoiItemLayout != null) {
                if (mPoiInfoList.size() <= 0) {
                    mArPoiItemLayout.setVisibility(View.GONE);
                } else {
                    mCameraGLView.setFindArSensorState(remapValue, getLayoutInflater(),
                            mArPoiItemLayout, ARActivity.this, (ArrayList) mPoiInfoList, ARActivity.this);
                    mArPoiItemLayout.setVisibility(View.VISIBLE);
                }
            }
        }
    }

    public LayoutInflater getLayoutInflater() {
        return LayoutInflater.from(ARActivity.this).cloneInContext(ARActivity.this);
    }

    @Override
    public void noPoiInScreen(boolean b) {

    }

    @Override
    public void selectItem(Object o) {

    }

    private void finishCamInternal(){
        if (mCameraGLView != null) {
            mCameraGLView.stopCam();
            mCameraLayout.removeAllViews();
            mCameraGLView = null;
        }

        if (mArPoiItemLayout != null) {
            mArPoiItemLayout.removeAllViews();
        }

        if (mSensor != null) {
            mSensor.stopSensor();
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();
        finishCamInternal();
    }
}

这个就是集成百度地图AR识别SDK的全部内容，如果有不懂的或者是出问题的，可以评论私信我，希望大家能够喜欢。