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

1compileSdkVersion
2minSdkVersion
3targetSdkVersion

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

1dependencies {
2    ...
3    
4    //让app包，与新添加的这个OpenCV库关联
5    implementation project(':openCVLibrary341')
6    //将打好jar包，添加到依赖中
7    implementation fileTree(dir: "$buildDir/native-libs", include: 'native-libs.jar')
8 }
9
10//以下很重要
11//将添加的.so文件，打包成jar
12task nativeLibsToJar(type: Jar, description: 'create a jar archive of the native libs') {
13    destinationDir file("$buildDir/native-libs")
14    baseName 'native-libs'
15    from fileTree(dir: 'libs', include: '**/*.so')
16    into 'lib/'
17}
18tasks.withType(JavaCompile) {
19    compileTask -> compileTask.dependsOn(nativeLibsToJar)
20}

7.初始化，图像转成灰色测试

1import android.graphics.Bitmap;
2import android.graphics.BitmapFactory;
3import android.os.Bundle;
4import android.support.v7.app.AppCompatActivity;
5import android.view.View;
6import android.widget.Button;
7import android.widget.ImageView;
8import android.widget.Toast;
9
10import org.opencv.android.OpenCVLoader;
11import org.opencv.android.Utils;
12import org.opencv.core.Mat;
13import org.opencv.imgproc.Imgproc;
14
15public class MainActivity extends AppCompatActivity {
16
17    private ImageView imageView;
18    private Button button;
19
20    @Override
21    protected void onCreate(Bundle savedInstanceState) {
22        super.onCreate(savedInstanceState);
23        setContentView(R.layout.activity_main);
24        initView();
25        //初始化
26        if (OpenCVLoader.initDebug()) {
27            Toast.makeText(this, "OpenCVLoader初始化成功", Toast.LENGTH_SHORT).show();
28        }
29
30        //测试灰度
31        button.setOnClickListener(new View.OnClickListener() {
32            @Override
33            public void onClick(View v) {
34                convert2Grey();
35            }
36        });
37
38
39    }
40
41    private void convert2Grey() {
42        Mat src = new Mat();//Mat是OpenCV的一种图像格式
43        Mat temp = new Mat();
44        Mat dst = new Mat();
45        Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(), R.mipmap.bd_logo1);
46        Utils.bitmapToMat(bitmap, src);
47        Imgproc.cvtColor(src, temp, Imgproc.COLOR_RGB2BGR);
48        Imgproc.cvtColor(temp, dst, Imgproc.COLOR_BGR2GRAY);
49        Utils.matToBitmap(dst, bitmap);
50        imageView.setImageBitmap(bitmap);
51        //
52        src.release();
53        temp.release();
54        dst.release();
55    }
56
57    private void initView() {
58        imageView = (ImageView) findViewById(R.id.imageView);
59        button = (Button) findViewById(R.id.button);
60    }
61}

Demo下载

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