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使用Android studio3.6的java api方式调用opencv

浏览:34日期:2022-09-03 16:10:17

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:AndroidOpenCV-android-sdksdkjava

(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

使用Android studio3.6的java api方式调用opencv

(6)app/src/main/res/layout中修改布局文件activity_main.xml

使用Android studio3.6的java api方式调用opencv

<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: android:layout_width='wrap_content' android:layout_height='wrap_content' android:background='@drawable/dilireba' android:layout_centerInParent='true'/> <Button android: 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:UsersxxxAppDataLocalAndroidSdkplatform-tools

(10)命令行进入apk所在的路径D:AndroidOpenCV-android-sdkapk,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

使用Android studio3.6的java api方式调用opencv

工程目录结构:

使用Android studio3.6的java api方式调用opencv

运行:

使用Android studio3.6的java api方式调用opencv

The Code:

http://xiazai.jb51.net/202003/yuanma/op_jb51.rar

总结

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