Android+OpenCV4.2.0环境配置详解(Android studio)

apply plugin: 'com.android.library'

android {
  compileSdkVersion 29
  buildToolsVersion "29.0.2"

  buildTypes {
    release {
      minifyEnabled false
      proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
    }
  }
}

sourceSets {
  main{
    jniLibs.srcDirs = ['libs']
  }
}

apply plugin: 'com.android.application'

android {
  compileSdkVersion 29
  buildToolsVersion "29.0.2"
  defaultConfig {
    applicationId "com.e.opencv_test"
    minSdkVersion 23
    targetSdkVersion 29
    versionCode 1
    versionName "1.0"
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    externalNativeBuild {
      cmake {
        cppFlags ""
        arguments "-DANDROID_STL=c  _shared"
      }
    }
  }
  buildTypes {
    release {
      minifyEnabled false
      proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
    }
  }
  externalNativeBuild {
    cmake {
      path "src/main/cpp/CMakeLists.txt"
      version "3.10.2"
    }
  }
  sourceSets {
    main{
      jniLibs.srcDirs = ['libs']
    }
  }
}

dependencies {
  implementation fileTree(dir: 'libs', include: ['*.jar'])
  implementation 'androidx.appcompat:appcompat:1.1.0'
  implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
  testImplementation 'junit:junit:4.13'
  androidTestImplementation 'androidx.test.ext:junit:1.1.1'
  androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'
  implementation project(path: ':opencv')
}

public class MainActivity extends AppCompatActivity {
  private static final String TAG = "MainActivity";

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    System.loadLibrary("opencv_java4");
    iniLoadOpenCV(); 
  }

  private void iniLoadOpenCV() {
    boolean success = OpenCVLoader.initDebug();
    if (success) {
      Log.i(TAG, "成功");
    } else {
      Log.i(TAG, "失败");
      Toast.makeText(this.getApplicationContext(), "失败", Toast.LENGTH_LONG).show();
    }
  }
}