Android Studio-—使用OpenCV的配置方法和demo以及开发过程中遇到的问题解决

package com.example.lenovo.myapplication;import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import com.example.lenovo.R;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.LoaderCallbackInterface;
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 imgHuaishi;
private static boolean flag = true;
//private static boolean isFirst = true;
private static final String TAG = "MainActivity"; //OpenCV库加载并初始化成功后的回调函数
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, "成功加载");
break;
default:
super.onManagerConnected(status);
Log.i(TAG, "加载失败");
break;
} }
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initUI();
btnProcess.setOnClickListener(new ProcessClickListener());
}
public void initUI(){
btnProcess = (Button)findViewById(R.id.btn_gray_process);
imgHuaishi = (ImageView)findViewById(R.id.img_huaishi);
Log.i(TAG, "initUI sucess..."); } public void procSrc2Gray(){
Mat rgbMat = new Mat();
Mat grayMat = new Mat();
srcBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.text_img);
grayBitmap = Bitmap.createBitmap(srcBitmap.getWidth(), srcBitmap.getHeight(), Bitmap.Config.RGB_565);
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){
imgHuaishi.setImageBitmap(grayBitmap);
btnProcess.setText("查看原图");
flag = false;
}
else{
imgHuaishi.setImageBitmap(srcBitmap);
btnProcess.setText("灰度化");
flag = true;
}
} } @Override
public void onResume()
{
super.onResume();
if (!OpenCVLoader.initDebug()) {
Log.d(TAG, "Internal OpenCV library not found. Using OpenCV Manager for initialization");
OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_3_0_0, this, mLoaderCallback);
} else {
Log.d(TAG, "OpenCV library found inside package. Using it!");
mLoaderCallback.onManagerConnected(LoaderCallbackInterface.SUCCESS);
}
}
}

<?xml version="1.0" encoding="utf-8"?>
<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"
android:paddingLeft="16dp"
android:paddingRight="16dp"
android:paddingTop="16dp"
android:paddingBottom="16dp"
tools:context="com.example.mytest.MainActivity"> <ImageView
android:id="@+id/img_huaishi"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
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_huaishi"
android:layout_centerHorizontal="true"
android:text="灰度化"/>"
</RelativeLayout>