1, 下载并解压 javaCV 1.2

JavaCV 官方网站
地址 : https://github.com/bytedeco/javacv

下载选项

解压下载文件, 内容如下图

2.png

2, 打开Android Studio 新建项目.

3, 将以下包拷贝到"\TestJavaCV\app\libs"文件夹下.

3.png

4, 在app上按"F4"打开 Project Structure 页面.

4.1 选择 Dependencies , 如下图.

4.png

4.2 点击右侧 "+",选择"2 File Dependency". 将刚才拷贝的".jar"文件添加进去.

5.png

5, 在"app/build.gradle"中添加如下代码

android {
    //Exclude duplicates
    packagingOptions {
        exclude 'META-INF/services/javax.annotation.processing.Processor'
        pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.properties'
        pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/opencv/pom.xml'
        pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.properties'
        pickFirst  'META-INF/maven/org.bytedeco.javacpp-presets/ffmpeg/pom.xml'
    }
}

6.png

注意 : 如果不添加上面的代码会出现一下错误

错误信息

5, 测试程序

package com.wsj.custemview.testjavacv;

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.graphics.drawable.Drawable;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.widget.ImageView;

import org.bytedeco.javacpp.opencv_core;
import org.bytedeco.javacpp.opencv_core.IplImage;

// 静态成员变量必须 static导入.
import static org.bytedeco.javacpp.opencv_core.IPL_DEPTH_8U;
import static org.bytedeco.javacpp.opencv_core.cvFlip;


public class MainActivity extends AppCompatActivity {

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

        ImageView imageView = (ImageView) findViewById(R.id.img1);
        // Drawable drawable = idToDrawable(R.mipmap.ic_launcher);

        // Bitmap bitmap = this.drawableToBitmap(drawable);
        Bitmap bitmap = BitmapFactory.decodeResource(getResources(),R.mipmap.ic_launcher);
        IplImage iplImage = this.bitmapToIplImage(bitmap);
        cvFlip(iplImage,iplImage,0);
        bitmap = this.IplImageToBitmap(iplImage);
        imageView.setImageBitmap(bitmap);
    }
    /**
     * IplImage转化为Bitmap
     * @param iplImage
     * @return
     */
    public Bitmap IplImageToBitmap(opencv_core.IplImage iplImage) {
        Bitmap bitmap = null;
        bitmap = Bitmap.createBitmap(iplImage.width(), iplImage.height(),
                Bitmap.Config.ARGB_8888);
        bitmap.copyPixelsFromBuffer(iplImage.getByteBuffer());
        return bitmap;
    }

    /**
     * Bitmap转化为IplImage
     * @param bitmap
     * @return
     */
    public opencv_core.IplImage bitmapToIplImage(Bitmap bitmap) {
        opencv_core.IplImage iplImage;
        iplImage = IplImage.create(bitmap.getWidth(), bitmap.getHeight(),
                IPL_DEPTH_8U, 4);
        bitmap.copyPixelsToBuffer(iplImage.getByteBuffer());
        return iplImage;
    }

    /**
     * 将资源ID转化为Drawable
     * @param id
     * @return
     */
    public Drawable idToDrawable(int id) {
        return this.getResources().getDrawable(id);
    }

    /**
     * 将Drawable转化为Bitmap
     * @param drawable
     * @return
     */
    public Bitmap drawableToBitmap(Drawable drawable) {
        if(drawable == null)
            return null;
        return ((BitmapDrawable)drawable).getBitmap();
    }
}