OpenCV3.4.1快速集成到Android studio中，10分钟搞定

OpenCV3.4.1快速集成到Android studio中，10分钟搞定

转载 https://blog.csdn.net/yu540135101/article/details/82593860

1.下载地址（官网）

https://www.opencv.org/opencv-3-4-1.html

---

2.导入Module

---

3.删除以下代码

在OpenCV模块的清单文件中删除以下代码

 <uses-sdk android:minSdkVersion="8" android:targetSdkVersion="21" />

---

4.配置OpenCVLibrary341的SDK版本

在build.gradle(Module：OpenCVLibrary341)中，修改以下属性
改为和build.gradle（Module：app）中的值一样

compileSdkVersion
minSdkVersion
targetSdkVersion

5.复制armeabi-v7a文件夹到项目的libs目录下（注意要有文件夹）

复制成功后，也可以删除掉其他的.a文件，只保留libopencv_java3.so

---

6.添加依赖

dependencies {
    ...

    //让app包，与新添加的这个OpenCV库关联
    implementation project(':openCVLibrary341')
    //将打好jar包，添加到依赖中
    implementation fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar')
 }

//以下很重要
//将添加的.so文件，打包成jar
task nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') {
    destinationDir file("$buildDir/native-libs")
    baseName 'native-libs'
    from fileTree(dir: 'libs', include: '**/*.so')
    into 'lib/'
}
tasks.withType(JavaCompile) {
    compileTask -> compileTask.dependsOn(nativeLibsToJar)
}

---

7.初始化，图像转成灰色测试

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;

import org.opencv.android.OpenCVLoader;
import org.opencv.android.Utils;
import org.opencv.core.Mat;
import org.opencv.imgproc.Imgproc;

public class MainActivity extends AppCompatActivity {

    private ImageView imageView;
    private Button button;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        initView();
        //初始化
        if (OpenCVLoader.initDebug()) {
            Toast.makeText(this, "OpenCVLoader初始化成功", Toast.LENGTH_SHORT).show();
        }

        //测试灰度
        button.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                convert2Grey();
            }
        });

    }

    private void convert2Grey() {
        Mat src = new Mat();//Mat是OpenCV的一种图像格式
        Mat temp = new Mat();
        Mat dst = new Mat();
        Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(), R.mipmap.bd_logo1);
        Utils.bitmapToMat(bitmap, src);
        Imgproc.cvtColor(src, temp, Imgproc.COLOR_RGB2BGR);
        Imgproc.cvtColor(temp, dst, Imgproc.COLOR_BGR2GRAY);
        Utils.matToBitmap(dst, bitmap);
        imageView.setImageBitmap(bitmap);
        //
        src.release();
        temp.release();
        dst.release();
    }

    private void initView() {
        imageView = (ImageView) findViewById(R.id.imageView);
        button = (Button) findViewById(R.id.button);
    }
}

---

Demo下载

https://download.csdn.net/download/yu540135101/10659712