首先安装好NDK, File-> Setting -Android SDK -> SDK Tools->NDK
配置
步骤：
1.创建一个项目，勾选 Include C++ support,然后一路next 下去
创建Android 项目
-
最后勾选 C++。等待项目创建完成。（勾选C++ 是因为需要用到C++的配置）
创建Android 项目
3.接下来是导入model 项目，添加项目依赖包。方便大家，我直接放在我的云盘上。
链接：https://pan.baidu.com/s/1sH9PvgoZFI3Igy5knUY1MA
提取码：x5e0
导入项目依赖
导入项目依赖
- 然后添加项目依赖， File - > Project Structure -> Dependencies - >Module dependency
添加依赖
-
选择 openCVLibrary 添加依赖
完成依赖
注意：依赖的项目包可能和你的项目的版本不一致，你更新一下就好了。
注意事项
到这里，基本的OpenCV就配置好了。接下来就是项目的编写。用于检验配置是否完成。
实现的项目效果：
1.从相册中选择一张照片，然后进行灰度处理。
activity_layout.xml
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<LinearLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:orientation="horizontal">
<Button
android:id="@+id/btn_choose"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="原图"
android:textSize="16sp" />
<Button
android:id="@+id/btn_deals"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_margin="10dp"
android:text="处理"
android:textSize="16sp" />
</LinearLayout>
<ImageView
android:id="@+id/img_original"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"
android:layout_margin="16dp"
android:scaleType="fitCenter"
android:src="@mipmap/ic_launcher" />
<ImageView
android:id="@+id/img_deals"
android:layout_width="200dp"
android:layout_height="200dp"
android:layout_gravity="center"
android:layout_margin="16dp"
android:scaleType="fitCenter"
android:src="@mipmap/ic_launcher" />
</LinearLayout>
MainActivity.java
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
// Used to load the 'native-lib' library on application startup.
static {
System.loadLibrary("native-lib");
}
//最大
private double max_size = 1024;
//回调
private int PICK_IMAGE_REQUEST = 1;
//原图， 处理后的图片
private ImageView mImgOriginal, mImgDeals;
//原始Bitmap、处理后的Bitmap
private Bitmap mOriginalBitmap, mDealBitmap;
//选择图片、处理
private Button mBtnChoose, mBtnDeals;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
onLoadOpenCVLibrary();
initView();
}
/**
* OpenCV库静态加载并初始化
*/
private void onLoadOpenCVLibrary() {
boolean load = OpenCVLoader.initDebug();
if (load) {
Log.e("CV", "Open CV Libraries loaded...");
}
}
private void initView() {
mImgDeals = findViewById(R.id.img_deals);
mImgOriginal = findViewById(R.id.img_original);
mBtnChoose = findViewById(R.id.btn_choose);
mBtnDeals = findViewById(R.id.btn_deals);
mBtnDeals.setOnClickListener(this);
mBtnChoose.setOnClickListener(this);
}
/**
* A native method that is implemented by the 'native-lib' native library,
* which is packaged with this application.
*/
public native String stringFromJNI();
@Override
public void onClick(View view) {
switch (view.getId()) {
case R.id.btn_choose: {//选择
selectImage();
break;
}
case R.id.btn_deals: {//处理
convertGray();
break;
}
}
}
//选择图片
private void selectImage() {
Intent intent = new Intent();
intent.setType("image/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "选择图像"), PICK_IMAGE_REQUEST);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == PICK_IMAGE_REQUEST && resultCode == RESULT_OK
&& data != null && data.getData() != null) {
Uri uri = data.getData();
try {
Log.e("image-tag", "start to decode selected image now...");
InputStream input = getContentResolver().openInputStream(uri);
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeStream(input, null, options);
int raw_width = options.outWidth;
int raw_height = options.outHeight;
int max = Math.max(raw_width, raw_height);
int newWidth = raw_width;
int newHeight = raw_height;
int inSampleSize = 1;
if (max > max_size) {
newWidth = raw_width / 2;
newHeight = raw_height / 2;
while ((newWidth / inSampleSize) > max_size || (newHeight / inSampleSize) > max_size) {
inSampleSize *= 2;
}
}
options.inSampleSize = inSampleSize;
options.inJustDecodeBounds = false;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
mOriginalBitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri),
null, options);
mDealBitmap = BitmapFactory.decodeStream(getContentResolver().openInputStream(uri),
null, options);
mImgOriginal.setImageBitmap(mOriginalBitmap);
} catch (Exception e) {
e.printStackTrace();
}
}
}
private void convertGray() {
Mat src = new Mat();
Mat temp = new Mat();
Mat dst = new Mat();
Utils.bitmapToMat(mDealBitmap, src);
Imgproc.cvtColor(src, temp, Imgproc.COLOR_BGRA2BGR);
Imgproc.cvtColor(temp, dst, Imgproc.COLOR_BGR2GRAY);
Utils.matToBitmap(dst, mDealBitmap);
mImgDeals.setImageBitmap(mDealBitmap);
}
}
最终实现效果：
实现效果
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