的UnsatisfiedLinkError：使用opencv2.4.3了Android 4.0 n_Mat而 [英] UnsatisfiedLinkError: n_Mat while using opencv2.4.3 with android 4.0
问题描述
我使用的OpenCV的机器人。但发射后，当我加入垫（）在我的code我的应用程序意外停止。我的错误日志如下：
i am using opencv in android. but when i am adding Mat() in my code my application unexpectedly stops after launch. my error log is as below:
FATAL EXCEPTION: main
java.lang.UnsatisfiedLinkError: n_Mat
at org.opencv.core.Mat.n_Mat(Native Method)
at org.opencv.core.Mat.<init>(Mat.java:441)
at com.example.imagepro.MainActivity.onCreate(MainActivity.java:36)
at android.app.Activity.performCreate(Activity.java:4465)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1049)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1920)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
at android.app.ActivityThread.access$600(ActivityThread.java:123)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4424)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
at dalvik.system.NativeStart.main(Native Method)`
我的code是
my code is
import java.io.File;
import org.opencv.android.BaseLoaderCallback;
import org.opencv.android.LoaderCallbackInterface;
import org.opencv.android.OpenCVLoader;
import org.opencv.core.Mat;
import org.opencv.android.Utils;
import org.opencv.imgproc.Imgproc;
import android.os.Bundle;
import android.os.Environment;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.ImageView;
public class MainActivity extends Activity {
final String TAG = "Hello World";
Mat imgToProcess;
private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
// Create and set View
setContentView(R.layout.activity_main);
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "onCreate");
super.onCreate(savedInstanceState);
Log.i(TAG, "Trying to load OpenCV library");
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mOpenCVCallBack))
{
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
else{ Log.i(TAG, "opencv successfully added"); }
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
String path = Environment.getExternalStorageDirectory()+ "/Koala.jpg"; // get image from sd card
File imgFile = new File(path);
View v = null;
if(imgFile.exists())
{
Bitmap myBitmap = BitmapFactory.decodeFile(path);
ImageView myImage = (ImageView) findViewById(R.id.imageView);
myImage.setImageBitmap(myBitmap);
Log.i(TAG, "opencv successfull 1");
Mat imgToProcess = new Mat();
Mat newmat = new Mat();
Utils.bitmapToMat(myBitmap, imgToProcess);
Imgproc.cvtColor(imgToProcess, newmat, Imgproc.COLOR_RGB2GRAY);
Bitmap outImage = Bitmap.createBitmap(newmat.rows(),newmat.cols(),Bitmap.Config.ARGB_8888);
Utils.matToBitmap(newmat, outImage);
myImage.setImageBitmap(outImage);
}
}
}
我想提供的计算器等解决方案，但他们没有为我工作。我已经复制libopencv_java.so和libopencv_info.so到我的/ libs文件夹从F：\ OpenCV的-2.4.3.2 - Android的SDK \ SDK \本地\库\ armeabi-V7A但这个错误仍然相同
i tried other solutions provided on stackoverflow but none of them worked for me. i have already copied libopencv_java.so and libopencv_info.so into my /libs folder from F:\OpenCV-2.4.3.2-android-sdk\sdk\native\libs\armeabi-v7a but this error remains same.
请大家帮帮忙。
在此先感谢：）
推荐答案
其良好有人提示我后我的答案精心。所以我在这里张贴了我的问题的解决方案：
its good that someone prompted me to post my answer elaborately. so here i am posting the solution of my question :
private BaseLoaderCallback mOpenCVCallBack = new BaseLoaderCallback(this) {
@Override
public void onManagerConnected(int status) {
switch (status) {
case LoaderCallbackInterface.SUCCESS:
{
Log.i(TAG, "OpenCV loaded successfully");
startDisplay();
} break;
default:
{
super.onManagerConnected(status);
} break;
}
}
};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Log.i(TAG, "Trying to load OpenCV library");
if (!OpenCVLoader.initAsync(OpenCVLoader.OPENCV_VERSION_2_4_3, this, mOpenCVCallBack))
{
Log.e(TAG, "Cannot connect to OpenCV Manager");
}
else{ Log.i(TAG, "opencv successfull");
System.out.println(java.lang.Runtime.getRuntime().maxMemory()); }
setContentView(R.layout.frameview);
}
此错误背后的问题是，我们呼吁OpenCV的相关功能（例如：垫（））之前OpenCV的初始化所以它的示值误差。所以，你可以解决它，如果你把你的OpenCV的功能onManagerConnected（）是这样的：
The problem behind this error is that we are calling opencv dependent function(for example: Mat()) before opencv initialization so its showing error. So you can solve it if you put your opencv function in onManagerConnected() like this :
Log.i(TAG, "OpenCV loaded successfully");
startDisplay();
在这里，startDisplay（）包含我垫（）初始化。问题是，当我们启动一个应用程序，然后在OnCreate（）函数执行第一和加载了OpenCV的后，因此，如果你把你的OpenCV功能的OnCreate（），那么它会显示错误，因为OpenCV的还没有被加载。
here, startDisplay() contains my Mat() initialization. The problem is when we start an app then oncreate() function executes first and after that opencv is loaded, so if you put your opencv function in oncreate() then it will show error as opencv is not yet loaded.
我希望这将解决您的问题。祝您好运...＃1岩！ :)
I hope this will solve your problem. Best of luck... Stackoverflow Rocks!!! :)
这篇关于的UnsatisfiedLinkError：使用opencv2.4.3了Android 4.0 n_Mat而的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
