本文属于实战系列，是对《》等文的实践，调用meitu秀秀的libmtimage-jni.so文件来实现图片的美化功能
首先反编译得到/libmtimage-jni.so文件和JNI文件
新建项目，将/libmtimage-jni.so文件拷贝到libs文件夹下，新建JNI文件并拷贝代码，并导入loadLibrary
package com.mt.mtxx.image;public class JNI { static{ System.loadLibrary("mtimage-jni"); } public native void AutoColor(byte[] paramArrayOfByte, int paramInt1, int paramInt2, int paramInt3, int paramInt4); public native void AutoColorLevel(byte[] paramArrayOfByte, int paramInt1, int paramInt2, boolean paramBoolean); public native void AutoConstrast(byte[] paramArrayOfByte, int paramInt1, int paramInt2); public native void AutoWhiteBalance(byte[] paramArrayOfByte, int paramInt1, int paramInt2); public native void BackWeak(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, int paramInt1, int paramInt2, int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt3, byte[] paramArrayOfByte3, int paramInt4, int paramInt5); public native void BackWeak2(byte[] paramArrayOfByte1, int paramInt1, int paramInt2, int paramInt3, int paramInt4, byte[] paramArrayOfByte2, int paramInt5, int paramInt6); public native void BackWeakLine(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, int[] paramArrayOfInt3, int[] paramArrayOfInt4, float paramFloat, int paramInt3, int paramInt4); public native void BackWeakOne(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, int paramInt3, int paramInt4, byte[] paramArrayOfByte, int paramInt5, int paramInt6); public native void CColorBalance(boolean paramBoolean, int paramInt1, int paramInt2, int paramInt3, int paramInt4, byte[] paramArrayOfByte, int paramInt5, int paramInt6); public native void ColorModeEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2); public native void CompositeColorEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void DrawEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2); public native void ExclusionEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ExclusionEx2(byte[] paramArrayOfByte, byte paramByte1, byte paramByte2, byte paramByte3, double paramDouble); public native void FaceBeauty(int[] paramArrayOfInt, int paramInt1, int paramInt2, int paramInt3); public native void FaceBeautyRelease(); public native void FrameXCBK(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, int paramInt3); public native void GaussIIRBlurBrush(int[] paramArrayOfInt, int paramInt1, int paramInt2, int paramInt3, int paramInt4); public native void GaussIIRBlurImage(byte[] paramArrayOfByte, int paramInt1, int paramInt2, int paramInt3, int paramInt4); public native double GetDegreeByPoints(int paramInt1, int paramInt2, int paramInt3, int paramInt4); public native void Grayscale(byte[] paramArrayOfByte, int paramInt1, int paramInt2); public native void HardlightEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ImageColorBurnEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2); public native void ImageDarkenEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ImageExclusionEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ImageLightenEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ImageNormalEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ImageOverlayEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ImageScreenEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void ImageSoftLightEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void LOMO1(int[] paramArrayOfInt1, int paramInt1, int paramInt2, int[] paramArrayOfInt2); public native void LOMO2(int[] paramArrayOfInt1, int paramInt1, int paramInt2, int[] paramArrayOfInt2); public native void LightEnEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void MakeAllTransparent(byte[] paramArrayOfByte, int paramInt1, int paramInt2); public native void MultipleEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void NoiseEx(byte[] paramArrayOfByte, long paramLong); public native void NormalEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void OldImage(byte[] paramArrayOfByte1, int paramInt1, int paramInt2, byte[] paramArrayOfByte2, int paramInt3, int paramInt4); public native void PinLightEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2); public native void PtChangeByRotate(byte[] paramArrayOfByte, double paramDouble1, double paramDouble2, double paramDouble3); public native void RGBtoXYZ(byte paramByte1, byte paramByte2, byte paramByte3, byte[] paramArrayOfByte); public native void RGBtoYIQ(byte paramByte1, byte paramByte2, byte paramByte3, byte[] paramArrayOfByte); public native void RGBtoYUV(byte paramByte1, byte paramByte2, byte paramByte3, byte[] paramArrayOfByte); public native void Resample(byte[] paramArrayOfByte1, int paramInt1, int paramInt2, int paramInt3, byte[] paramArrayOfByte2, int paramInt4, int paramInt5); public native void SSkinbeautify(int[] paramArrayOfInt, int paramInt1, int paramInt2, int paramInt3, int paramInt4, int paramInt5, double paramDouble); public native void ScreenEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void SetBackWeakRadius(byte[] paramArrayOfByte, int paramInt1, int paramInt2); public native void SetColorImage(byte[] paramArrayOfByte, int paramInt1, int paramInt2, int paramInt3, int paramInt4, int paramInt5); public native void SetGrayScaleEx(byte[] paramArrayOfByte); public native void Sharp(int[] paramArrayOfInt, int paramInt1, int paramInt2, float paramFloat1, float paramFloat2); public native void SharpPreview(int[] paramArrayOfInt, int paramInt1, int paramInt2, float paramFloat1, float paramFloat2); public native void SharpPreviewRelease(); public native void ShiftRGBEx(byte[] paramArrayOfByte, byte paramByte1, byte paramByte2, byte paramByte3); public native void SkinWhite(int[] paramArrayOfInt, int paramInt1, int paramInt2, int paramInt3); public native void SoftLightEx(byte[] paramArrayOfByte1, byte[] paramArrayOfByte2, double paramDouble); public native void StyleBaoColor(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleCinnamon(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleClassic(int[] paramArrayOfInt, int paramInt1, int paramInt2, double paramDouble); public native void StyleClassicStudio(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleEP1(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleEP2(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleElegant(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleElegantNew(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleFP1(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleFP2(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleFilm(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleGP1(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, byte[] paramArrayOfByte, int paramInt3); public native void StyleGP2(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, byte[] paramArrayOfByte, int paramInt3); public native void StyleImpression(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleJapanese(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleLomoAP1(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, byte[] paramArrayOfByte, int paramInt3); public native void StyleLomoAP2(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, byte[] paramArrayOfByte, int paramInt3); public native void StyleLomoB(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleLomoBrightRed(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleLomoC(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleLomoChristmas(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleLomoHDR(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void StyleMilk1(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleMilk2(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleMilk3(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleMilk4(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleOldPhoto(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2); public native void StyleOldPhotoP1(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, byte[] paramArrayOfByte, int paramInt3); public native void StyleOldPhotoP2(int[] paramArrayOfInt1, int[] paramArrayOfInt2, int paramInt1, int paramInt2, byte[] paramArrayOfByte, int paramInt3); public native void StyleRetro(int[] paramArrayOfInt, int paramInt1, int paramInt2); public native void XYZtoRGB(byte paramByte1, byte paramByte2, byte paramByte3, byte[] paramArrayOfByte); public native void YIQtoRGB(byte paramByte1, byte paramByte2, byte paramByte3, byte[] paramArrayOfByte); public native void YUVtoRGB(byte paramByte1, byte paramByte2, byte paramByte3, byte[] paramArrayOfByte); public native int add(int paramInt, byte paramByte); public native byte[] deal(byte[] paramArrayOfByte, int paramInt1, int paramInt2, int paramInt3, int paramInt4, String paramString);} 项目布局如下：
（图片来自于网络）
代码如下：
package com.wuyudong.wuxiuxiu;import com.mt.mtxx.image.JNI;import android.os.Bundle;import android.app.Activity;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.view.View;import android.widget.ImageView;public class MainActivity extends Activity { private ImageView image; private JNI jni; private Bitmap bm; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); image = (ImageView) findViewById(R.id.image); bm = BitmapFactory.decodeFile("sdcard/awaiyi.jpg"); image.setImageBitmap(bm); jni = new JNI(); } public void process(View v) { int width = bm.getWidth(); int height = bm.getHeight(); int[] pixels = new int[width * height]; // getPixels执行之后pixels数组就被修改了 pixel中保存了bm的颜色信息 bm.getPixels(pixels, 0, width, 0, 0, width, height); // StyleLomoB运行后，pixel的颜色信息已经被修改 修改成特效处理后的颜色信息 jni.StyleLomoB(pixels, width, height); // 用处理好的像素数组 创建一张新的图片就是经过特效处理的 Bitmap bm2 = Bitmap.createBitmap(pixels, width, height, bm.getConfig()); image.setImageBitmap(bm2); }} 获取更多C语言与算法相关知识，关注公众号：“csuanfa”
