Android 加入Opencv library

1.從下載Android最新的OpenCV的SDK OpenCV.org並解壓縮zip文件。

2.OpenCV的導入到Android工作室， From File -> New -> Import Module, choose sdk/java folder，選擇在解壓縮檔案OpenCV的SDK / java文件夾。

3.Update build.gradle under imported OpenCV module to update 4 fields to match your project 

• (a) compileSdkVersion
• (b) buildToolsVersion
• (c) minSdkVersion 
• (d) targetSdkVersion.

compileSdkVersion、buildToolsVersion、minSdkVersion 、targetSdkVersion、版本需要一樣

4.Add module dependency by Application -> Module Settings, and select the Dependencies tab. Click + icon at bottom, choose Module Dependency and select the imported OpenCV module.

到這一步測試程式已經可以使用，但其他文章還有步驟,目前不知道原因

5.將解壓縮的Opencv,sdk-->native-->libs資料夾複製,貼在Project下app-->src-->main目錄下,並重新命名為jniLibs

測試代碼

<?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:id="@+id/activity_main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context="com.example.cheng.myapplication.MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentTop="true"
        android:text="OpenCV"/>

    <ImageView
        android:id="@+id/img"
        android:layout_width="700px"
        android:layout_height="700px"
        android:background="@drawable/lena"
        android:layout_centerHorizontal="true" />

    <Button
        android:id="@+id/btn"
        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>

xxx.java

package org.opencv.android;

import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.DialogInterface.OnClickListener;
import android.util.Log;

/**
 * Basic implementation of LoaderCallbackInterface.
 */
public abstract class BaseLoaderCallback implements LoaderCallbackInterface {

    public BaseLoaderCallback(Context AppContext) {
        mAppContext = AppContext;
    }

    public void onManagerConnected(int status)
    {
        switch (status)
        {
            /** OpenCV initialization was successful. **/
            case LoaderCallbackInterface.SUCCESS:
            {
                /** Application must override this method to handle successful library initialization. **/
            } break;
            /** OpenCV loader can not start Google Play Market. **/
            case LoaderCallbackInterface.MARKET_ERROR:
            {
                Log.e(TAG, "Package installation failed!");
                AlertDialog MarketErrorMessage = new AlertDialog.Builder(mAppContext).create();
                MarketErrorMessage.setTitle("OpenCV Manager");
                MarketErrorMessage.setMessage("Package installation failed!");
                MarketErrorMessage.setCancelable(false); // This blocks the 'BACK' button
                MarketErrorMessage.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                });
                MarketErrorMessage.show();
            } break;
            /** Package installation has been canceled. **/
            case LoaderCallbackInterface.INSTALL_CANCELED:
            {
                Log.d(TAG, "OpenCV library instalation was canceled by user");
                finish();
            } break;
            /** Application is incompatible with this version of OpenCV Manager. Possibly, a service update is required. **/
            case LoaderCallbackInterface.INCOMPATIBLE_MANAGER_VERSION:
            {
                Log.d(TAG, "OpenCV Manager Service is uncompatible with this app!");
                AlertDialog IncomatibilityMessage = new AlertDialog.Builder(mAppContext).create();
                IncomatibilityMessage.setTitle("OpenCV Manager");
                IncomatibilityMessage.setMessage("OpenCV Manager service is incompatible with this app. Try to update it via Google Play.");
                IncomatibilityMessage.setCancelable(false); // This blocks the 'BACK' button
                IncomatibilityMessage.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                });
                IncomatibilityMessage.show();
            } break;
            /** Other status, i.e. INIT_FAILED. **/
            default:
            {
                Log.e(TAG, "OpenCV loading failed!");
                AlertDialog InitFailedDialog = new AlertDialog.Builder(mAppContext).create();
                InitFailedDialog.setTitle("OpenCV error");
                InitFailedDialog.setMessage("OpenCV was not initialised correctly. Application will be shut down");
                InitFailedDialog.setCancelable(false); // This blocks the 'BACK' button
                InitFailedDialog.setButton(AlertDialog.BUTTON_POSITIVE, "OK", new OnClickListener() {

                    public void onClick(DialogInterface dialog, int which) {
                        finish();
                    }
                });

                InitFailedDialog.show();
            } break;
        }
    }

    public void onPackageInstall(final int operation, final InstallCallbackInterface callback)
    {
        switch (operation)
        {
            case InstallCallbackInterface.NEW_INSTALLATION:
            {
                AlertDialog InstallMessage = new AlertDialog.Builder(mAppContext).create();
                InstallMessage.setTitle("Package not found");
                InstallMessage.setMessage(callback.getPackageName() + " package was not found! Try to install it?");
                InstallMessage.setCancelable(false); // This blocks the 'BACK' button
                InstallMessage.setButton(AlertDialog.BUTTON_POSITIVE, "Yes", new OnClickListener()
                {
                    public void onClick(DialogInterface dialog, int which)
                    {
                        callback.install();
                    }
                });

                InstallMessage.setButton(AlertDialog.BUTTON_NEGATIVE, "No", new OnClickListener() {

                    public void onClick(DialogInterface dialog, int which)
                    {
                        callback.cancel();
                    }
                });

                InstallMessage.show();
            } break;
            case InstallCallbackInterface.INSTALLATION_PROGRESS:
            {
                AlertDialog WaitMessage = new AlertDialog.Builder(mAppContext).create();
                WaitMessage.setTitle("OpenCV is not ready");
                WaitMessage.setMessage("Installation is in progress. Wait or exit?");
                WaitMessage.setCancelable(false); // This blocks the 'BACK' button
                WaitMessage.setButton(AlertDialog.BUTTON_POSITIVE, "Wait", new OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        callback.wait_install();
                    }
                });
                WaitMessage.setButton(AlertDialog.BUTTON_NEGATIVE, "Exit", new OnClickListener() {
                    public void onClick(DialogInterface dialog, int which) {
                        callback.cancel();
                    }
                });

                WaitMessage.show();
            } break;
        }
    }

    void finish()
    {
        ((Activity) mAppContext).finish();
    }

    protected Context mAppContext;
    private final static String TAG = "OpenCVLoader/BaseLoaderCallback";
}

Reference:

http://stackoverflow.com/questions/27406303/opencv-in-android-studio
http://blog.csdn.net/gao_chun/article/details/49359535
https://github.com/jlhonora/opencv-android-sample