使用Android studio3.6的java api方式调用opencv
基本环境:
Android studio3.6
NDK:r15c(尽量使用该版本)
Opencv3.4.1 android sdk
操作:
(1)新建工程,选择Empty Activity,工程名为op
(2)File->New->Import Module,然后选择自己的java-opencv的相对应路径,比如,D:\Android\OpenCV-android-sdk\sdk\java
(3)修改openCVlibrary341下面的build.gradle中的,compileSdkVersion,buildToolsVersion,minSdkVersion,targetSdkVersion,使得和自己的工程下面的app/build.gradle的版本一致。
(4)修改openCVlibrary341下面的src/main
中的AndroidManifest.xml中的minSdkVersion,targetSdkVersion,使得和自己的工程下面的app/build.gradle的版本一致。
(5)app/src/main/res/drawable下面增加一张图片
(6)app/src/main/res/layout中修改布局文件activity_main.xml
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" tools:context=".MainActivity" > <ImageView android:id="@+id/img" android:layout_width="wrap_content" android:layout_height="wrap_content" android:background="@drawable/dilireba" android:layout_centerInParent="true"/> <Button android:id="@+id/btn_gray_process" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@id/img" android:layout_centerHorizontal="true" android:text="灰度化"/>" </RelativeLayout>
(7)修改app/src/main/java/com.example.op下面的MainActivity
package com.example.op; import androidx.appcompat.app.AppCompatActivity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.ImageView; import org.opencv.android.BaseLoaderCallback; 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 { Button btnProcess; Bitmap srcBitmap; Bitmap grayBitmap; ImageView img; private static boolean flag = true; private static boolean isFirst = true; private static final String TAG = "MainActivity"; private BaseLoaderCallback mLoaderCallback = new BaseLoaderCallback(this) { @Override public void onManagerConnected(int status) { // TODO Auto-generated method stub switch (status){ case BaseLoaderCallback.SUCCESS: Log.i(TAG, "baseloader success"); break; default: super.onManagerConnected(status); Log.i(TAG, String.valueOf(status)); break; } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); btnProcess = (Button)findViewById(R.id.btn_gray_process); img = (ImageView)findViewById(R.id.img); Log.i(TAG, "initUI sucess..."); btnProcess.setOnClickListener(new ProcessClickListener()); } public void procSrc2Gray(){ Mat rgbMat = new Mat(); Mat grayMat = new Mat(); srcBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.dilireba); grayBitmap = Bitmap.createBitmap(srcBitmap.getWidth(), srcBitmap.getHeight(), Bitmap.Config.ARGB_8888); Utils.bitmapToMat(srcBitmap, rgbMat);//convert original bitmap to Mat, R G B. Imgproc.cvtColor(rgbMat, grayMat, Imgproc.COLOR_RGB2GRAY);//rgbMat to gray grayMat Utils.matToBitmap(grayMat, grayBitmap); //convert mat to bitmap Log.i(TAG, "procSrc2Gray sucess..."); } private class ProcessClickListener implements View.OnClickListener { @Override public void onClick(View v) { // TODO Auto-generated method stub if(isFirst) { procSrc2Gray(); isFirst = false; } if(flag){ img.setImageBitmap(grayBitmap); btnProcess.setText("gray image"); flag = false; } else{ img.setImageBitmap(srcBitmap); btnProcess.setText("rgb image"); flag = true; } } } @Override protected void onResume() { // TODO Auto-generated method stub super.onResume(); //load OpenCV engine and init OpenCV library OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION, getApplicationContext(), mLoaderCallback); Log.i(TAG, "onResume sucess load OpenCV..."); } }
(8)app/build.gradledependencies中增加,
implementation project(path: ':openCVLibrary341')
(9)环境变量,path中增加adb所在路径,C:\Users\xxx\AppData\Local\Android\Sdk\platform-tools
(10)命令行进入apk所在的路径D:\Android\OpenCV-android-sdk\apk,执行,
adb install OpenCV_3.4.1_Manager_3.41_x86.apk
在模拟器中安装opencv-manager
,然后重启模拟器
工程目录结构:
运行:
The Code:
http://xiazai.jb51.net/202003/yuanma/op_jb51.rar
总结
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