第一步创建 ui

 

 

第二步，写activity   MainActivity

 

import android.app.Activity;import android.os.Bundle;import android.util.Log;import android.graphics.BitmapFactory;import android.graphics.Bitmap;import android.graphics.Bitmap.Config;import android.view.View;import android.widget.ImageView;public class IBMPhotoPhun extends Activity {    private String tag = "IBMPhotoPhun";    private Bitmap bitmapOrig = null;    private Bitmap bitmapGray = null;    private Bitmap bitmapWip = null;    private ImageView ivDisplay = null;                // NDK STUFF    static {        System.loadLibrary("ibmphotophun");    }    public native void convertToGray(Bitmap bitmapIn,Bitmap bitmapOut);    public native void changeBrightness(int direction,Bitmap bitmap);    public native void findEdges(Bitmap bitmapIn,Bitmap bitmapOut);    // END NDK STUFF                /** Called when the activity is first created. */    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        Log.i(tag,"before image stuff");        ivDisplay = (ImageView) findViewById(R.id.ivDisplay);                    // load bitmap from resources        BitmapFactory.Options options = new BitmapFactory.Options();        // Make sure it is 24 bit color as our image processing algorithm 		// expects this format        options.inPreferredConfig = Config.ARGB_8888;        bitmapOrig = BitmapFactory.decodeResource(this.getResources(), R.drawable.sampleimage,options);        if (bitmapOrig != null)            ivDisplay.setImageBitmap(bitmapOrig);          }     public void onResetImage(View v) {        Log.i(tag,"onResetImage");        ivDisplay.setImageBitmap(bitmapOrig);            }     public void onFindEdges(View v) {        Log.i(tag,"onFindEdges");        // make sure our target bitmaps are happy        bitmapGray = Bitmap.createBitmap(bitmapOrig.getWidth(),bitmapOrig.getHeight(),Config.ALPHA_8);        bitmapWip = Bitmap.createBitmap(bitmapOrig.getWidth(),bitmapOrig.getHeight(),Config.ALPHA_8);        // before finding edges, we need to convert this image to gray        convertToGray(bitmapOrig,bitmapGray);        // find edges in the image        findEdges(bitmapGray,bitmapWip);        ivDisplay.setImageBitmap(bitmapWip);            }    public void onConvertToGray(View v) {        Log.i(tag,"onConvertToGray");         bitmapWip = Bitmap.createBitmap(bitmapOrig.getWidth(),bitmapOrig.getHeight(),Config.ALPHA_8);        convertToGray(bitmapOrig,bitmapWip);        ivDisplay.setImageBitmap(bitmapWip);    }        public void onDimmer(View v) {        Log.i(tag,"onDimmer");                changeBrightness(2,bitmapWip);        ivDisplay.setImageBitmap(bitmapWip);    }    public void onBrighter(View v) {        Log.i(tag,"onBrighter");          changeBrightness(1,bitmapWip);        ivDisplay.setImageBitmap(bitmapWip);    }   }

 

 

Android.mk

LOCAL_PATH := $(call my-dir)include $(CLEAR_VARS)LOCAL_MODULE    := ibmphotophunLOCAL_SRC_FILES := ibmphotophun.cLOCAL_LDLIBS    := -llog -ljnigraphicsinclude $(BUILD_SHARED_LIBRARY)

 

增加宏

/* * ibmphotophun.c *  * Author: Frank Ableson * Contact Info: fableson@msiservices.com */#include 
    
     #include 
     
      #include 
      
       #define  LOG_TAG    "libibmphotophun"#define  LOGI(...)  __android_log_print(ANDROID_LOG_INFO,LOG_TAG,__VA_ARGS__)#define  LOGE(...)  __android_log_print(ANDROID_LOG_ERROR,LOG_TAG,__VA_ARGS__)typedef struct {    uint8_t alpha;    uint8_t red;    uint8_t green;    uint8_t blue;} argb;/*convertToGrayPixel operation*/JNIEXPORT void JNICALL Java_com_msi_ibm_ndk_IBMPhotoPhun_convertToGray(JNIEnv * env, jobject  obj, jobject bitmapcolor,jobject bitmapgray){    AndroidBitmapInfo  infocolor;    void*              pixelscolor;     AndroidBitmapInfo  infogray;    void*              pixelsgray;    int                ret;    int             y;    int             x;         LOGI("convertToGray");    if ((ret = AndroidBitmap_getInfo(env, bitmapcolor, &infocolor)) < 0) {        LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);        return;    }        if ((ret = AndroidBitmap_getInfo(env, bitmapgray, &infogray)) < 0) {        LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);        return;    }        LOGI("color image :: width is %d; height is %d; stride is %d; format is %d;flags is %d",infocolor.width,infocolor.height,infocolor.stride,infocolor.format,infocolor.flags);    if (infocolor.format != ANDROID_BITMAP_FORMAT_RGBA_8888) {        LOGE("Bitmap format is not RGBA_8888 !");        return;    }        LOGI("gray image :: width is %d; height is %d; stride is %d; format is %d;flags is %d",infogray.width,infogray.height,infogray.stride,infogray.format,infogray.flags);    if (infogray.format != ANDROID_BITMAP_FORMAT_A_8) {        LOGE("Bitmap format is not A_8 !");        return;    }          if ((ret = AndroidBitmap_lockPixels(env, bitmapcolor, &pixelscolor)) < 0) {        LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);    }    if ((ret = AndroidBitmap_lockPixels(env, bitmapgray, &pixelsgray)) < 0) {        LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);    }    // modify pixels with image processing algorithm        for (y=0;y
       
        = 255) {                grayline[x] = 255;            } else if (v <= 0) {                grayline[x] = 0;            } else {                grayline[x] = (uint8_t) v;            }        }                pixelsgray = (char *) pixelsgray + infogray.stride;    }        AndroidBitmap_unlockPixels(env, bitmap);    }/*findEdgesMatrix operation*/JNIEXPORT void JNICALL Java_com_msi_ibm_ndk_IBMPhotoPhun_findEdges(JNIEnv * env, jobject  obj, jobject bitmapgray,jobject bitmapedges){    AndroidBitmapInfo  infogray;    void*              pixelsgray;    AndroidBitmapInfo  infoedges;    void*              pixelsedge;    int                ret;    int             y;    int             x;    int             sumX,sumY,sum;    int             i,j;    int                Gx[3][3];    int                Gy[3][3];    uint8_t            *graydata;    uint8_t            *edgedata;        LOGI("findEdges running");            Gx[0][0] = -1;Gx[0][1] = 0;Gx[0][2] = 1;    Gx[1][0] = -2;Gx[1][1] = 0;Gx[1][2] = 2;    Gx[2][0] = -1;Gx[2][1] = 0;Gx[2][2] = 1;                Gy[0][0] = 1;Gy[0][1] = 2;Gy[0][2] = 1;    Gy[1][0] = 0;Gy[1][1] = 0;Gy[1][2] = 0;    Gy[2][0] = -1;Gy[2][1] = -2;Gy[2][2] = -1;    if ((ret = AndroidBitmap_getInfo(env, bitmapgray, &infogray)) < 0) {        LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);        return;    }        if ((ret = AndroidBitmap_getInfo(env, bitmapedges, &infoedges)) < 0) {        LOGE("AndroidBitmap_getInfo() failed ! error=%d", ret);        return;    }            LOGI("gray image :: width is %d; height is %d; stride is %d; format is %d;flags is%d",infogray.width,infogray.height,infogray.stride,infogray.format,infogray.flags);    if (infogray.format != ANDROID_BITMAP_FORMAT_A_8) {        LOGE("Bitmap format is not A_8 !");        return;    }      LOGI("color image :: width is %d; height is %d; stride is %d; format is %d;flags is%d",infoedges.width,infoedges.height,infoedges.stride,infoedges.format,infoedges.flags);    if (infoedges.format != ANDROID_BITMAP_FORMAT_A_8) {        LOGE("Bitmap format is not A_8 !");        return;    }        if ((ret = AndroidBitmap_lockPixels(env, bitmapgray, &pixelsgray)) < 0) {        LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);    }    if ((ret = AndroidBitmap_lockPixels(env, bitmapedges, &pixelsedge)) < 0) {        LOGE("AndroidBitmap_lockPixels() failed ! error=%d", ret);    }        // modify pixels with image processing algorithm            LOGI("time to modify pixels....");            graydata = (uint8_t *) pixelsgray;    edgedata = (uint8_t *) pixelsedge;        for (y=0;y<=infogray.height - 1;y++) {        for (x=0;x
        
         255) sum = 255;            if (sum<0) sum = 0;                        *(edgedata + x + y*infogray.width) = 255 - (uint8_t) sum;                                            }    }        AndroidBitmap_unlockPixels(env, bitmapgray);    AndroidBitmap_unlockPixels(env, bitmapedges);    }