我从未接触过ndk。但是我有一个项目使用了ndk。
它给我报错:java.lang.UnsatisfiedLinkError: Native method not found:
我尝试在Google上搜索,找到了很多链接,但所有的链接都与jni.cpp
文件有关,而我的错误出现在Java文件中。所以我不知道该如何纠正它。
"java.lang.UnsatisfiedLinkError: Native method not found: il.co.telavivapp2u.onceapponatime.SharedResources.ocvBitmapPreMultAlpha:(Landroid/graphics/Bitmap;Landroid/graphics/Bitmap;)
我按照这个链接集成了NDK。 这个项目是由另一个开发人员完成的,我们正在添加一些其他功能。这部分由之前的开发人员完成。
我刚刚添加了Google搜索API活动和图库图像活动,它将在网格上显示图像。之前的开发人员将一些图像放在drawable文件夹中,并在画廊视图中显示它们。他在自己那边做得很好,现在也是完美运行的。但是,我所添加的相同内容却没有实现。
在应用程序可绘制的画廊视图上单击图像后,它会进入一个相机活动,该相机活动将选定的图像作为背景捕获图像。然后,我们可以对该图像进行编辑并保存。但是,在使用手机画廊和Google搜索图像时,捕获后应用程序会出现ANR。
我已设置Eclipse的NDK路径和变量,还安装了C C ++插件。
此外,控制台也显示了相关信息。
Cannot run program "\ndk-build.cmd": Launching failed .
我无法理解我犯了什么错误,请帮助我。
ANR发生在第207行。
这是我的代码:
package il.co.telavivapp2u.onceapponatime;
import java.io.File;
import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Point;
import android.os.Environment;
import android.util.Log;
import android.view.Display;
public class SharedResources {
public static Bitmap bmpOld = null;
public static Bitmap bmpOldScaled = null;
public static Bitmap bmpNew = null;
public static Bitmap bmpNewScaled = null;
public static int scaledX = 0, scaledY = 0;
public static int dispX = 0, dispY = 0;
public static int fullX = 0, fullY = 0;
public static int picX = 0, picY = 0;
public static String fileDir = "/OnceAppOnATime/";
public static String fileTempDir = fileDir + "/.temp/";
public static String fileTempNew = fileTempDir + "/temp-new.jpg";
public static String fileTempOld = fileTempDir + "/temp-old.jpg";
public static String fileTempMask = fileTempDir + "/temp-mask.jpg";
public static String fileTempBlend = fileTempDir + "/temp-blend.jpg";
public static String fileTempRetouch = fileTempDir + "/temp-retouch.jpg";
//public static String fileLastBlend = "";
public static BitmapFactory.Options op = new BitmapFactory.Options();
public static Locale localeHebrew = null;
public static int taskID = -1;
public static boolean Init(Activity activity) { return Init(activity, false); }
@SuppressLint("NewApi")
@SuppressWarnings("deprecation")
public static boolean Init(Activity activity, boolean force) {
if (dispX > 0 && dispY > 0) { // Don't re-init to avoid wrong file names
if (!force)
return false;
} else {
fileDir = Environment.getExternalStorageDirectory() + fileDir;
fileTempDir = Environment.getExternalStorageDirectory() + fileTempDir;
fileTempNew = Environment.getExternalStorageDirectory() + fileTempNew;
fileTempOld = Environment.getExternalStorageDirectory() + fileTempOld;
fileTempMask = Environment.getExternalStorageDirectory() + fileTempMask;
fileTempBlend = Environment.getExternalStorageDirectory() + fileTempBlend;
fileTempRetouch = Environment.getExternalStorageDirectory() + fileTempRetouch;
}
taskID = activity.getTaskId();
// Find Hebrew locale, if available
Locale availableLocales[] = Locale.getAvailableLocales();
for (int i = 0; i < availableLocales.length; ++i) {
String lang = availableLocales[i].getLanguage();
if (lang.equals("he") || lang.equals("iw")) {
localeHebrew = availableLocales[i];
break;
}
}
op.inPreferredConfig = Bitmap.Config.ARGB_8888;
//op.inScaled = false; // Not needed if loading bitmaps from drawable-nodpi
op.inMutable = true;
Display display = activity.getWindowManager().getDefaultDisplay();
if (android.os.Build.VERSION.SDK_INT < android.os.Build.VERSION_CODES.HONEYCOMB_MR2) {
dispX = display.getWidth();
dispY = display.getHeight();
} else {
Point dispSize = new Point();
display.getSize(dispSize);
dispX = dispSize.x;
dispY = dispSize.y;
}
Log.w("Display Size", dispX + "x" + dispY);
//scaledX = dispX / 2; scaledY = dispY / 2;
scaledX = dispX; scaledY = dispY;
return true;
}
public static void setLocale(Activity activity, Locale locale) {
// This doesn't work reliably
Locale.setDefault(locale);
Configuration config = new Configuration();
config.locale = locale;
activity.getBaseContext().getResources().updateConfiguration(config,
activity.getBaseContext().getResources().getDisplayMetrics());
}
public static boolean haveScaling() {
return (dispX != scaledX || dispY != scaledY);
}
public static void SaveTempBitmap(Bitmap bitmap, String filename) {
try {
new File(fileTempDir).mkdirs();
FileOutputStream out = new FileOutputStream(filename);
bitmap.compress(Bitmap.CompressFormat.JPEG, 98, out);
} catch (Exception e) {
e.printStackTrace();
}
}
public static void RecycleOldBitmaps(boolean full, boolean scaled) {
if (full && bmpOld != null) {
bmpOld.recycle();
bmpOld = null;
}
if (scaled && bmpOldScaled != null) {
bmpOldScaled.recycle();
bmpOldScaled = null;
}
}
public static void RecycleNewBitmaps(boolean full, boolean scaled) {
if (full && bmpNew != null) {
bmpNew.recycle();
bmpNew = null;
}
if (scaled && bmpNewScaled != null) {
bmpNewScaled.recycle();
bmpNewScaled = null;
}
}
// 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
public static int sample2sample[] = new int[] {1, 1, 2, 2, 4, 4, 4, 4, 8, 8, 8, 8, 8, 8, 8, 8, 16,
16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32};
public static Bitmap LoadScaledBitmap(Context ctx, int resId, float fracX, float fracY) {
// See: http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeResource(ctx.getResources(), resId, opts);
int imageHeight = opts.outHeight;
int imageWidth = opts.outWidth;
float requestX = dispX * fracX, requestY = dispY * fracY;
opts.inSampleSize = (int)(Math.min(imageWidth / requestX, imageHeight / requestY));
if (opts.inSampleSize < 0 || opts.inSampleSize > 32) // Sometimes index=2147483647 for some reason...
opts.inSampleSize = 1;
opts.inSampleSize = sample2sample[opts.inSampleSize];
Log.w("Bitmap Decoder", "Samples: " + opts.inSampleSize);
opts.inPreferredConfig = Bitmap.Config.ARGB_8888;
//opts.inScaled = false; // Not needed if loading bitmaps from drawable-nodpi
opts.inMutable = true;
opts.inJustDecodeBounds = false;
return BitmapFactory.decodeResource(ctx.getResources(), resId, opts);
}
public static Bitmap LoadScaledBitmap(String filename, float fracX, float fracY) {
// See: http://developer.android.com/training/displaying-bitmaps/load-bitmap.html
BitmapFactory.Options opts = new BitmapFactory.Options();
opts.inJustDecodeBounds = true;
BitmapFactory.decodeFile(filename, opts);
int imageHeight = opts.outHeight;
int imageWidth = opts.outWidth;
float requestX = dispX * fracX, requestY = dispY * fracY;
opts.inSampleSize = (int)(Math.min(imageWidth / requestX, imageHeight / requestY));
if (opts.inSampleSize < 0 || opts.inSampleSize > 32) // Sometimes index=2147483647 for some reason...
opts.inSampleSize = 1;
opts.inSampleSize = sample2sample[opts.inSampleSize];
Log.w("Bitmap Decoder", "Samples: " + opts.inSampleSize);
opts.inPreferredConfig = Bitmap.Config.ARGB_8888;
//opts.inScaled = false; // Not needed if loading bitmaps from drawable-nodpi
opts.inMutable = true;
opts.inJustDecodeBounds = false;
return BitmapFactory.decodeFile(filename, opts);
}
public static String FileNameNow() {
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd_HH-mm-ss", Locale.ENGLISH);
return fileDir + sdf.format(new Date()) + ".jpg";
}
public static native void ocvBitmapPyramidalBlend(String fNew, String fOld, String fMask, String fBlend, int levels);
public static String ocvBitmapPyramidalBlendTimed(int levels) {
String fBlend = fileTempBlend;//FileNameNow();
long t = System.nanoTime();
ocvBitmapPyramidalBlend(fileTempNew, fileTempOld, fileTempMask, fBlend, levels);
long dt = (System.nanoTime() - t) / 1000; // Microseconds
Log.w("OpenCV", "Blended (pyramidal) bitmaps in " + (dt / 1000.0f) + " ms");
//fileLastBlend = fBlend;
return fBlend;
}
public static native void ocvBitmapPreMultAlpha(Bitmap bitmapImg, Bitmap bitmapMask);
public static void ocvBitmapPreMultAlphaTimed(Bitmap bitmapImg, Bitmap bitmapMask) {
long t = System.nanoTime();
ocvBitmapPreMultAlpha(bitmapImg, bitmapMask);
long dt = (System.nanoTime() - t) / 1000; // Microseconds
Log.i("Native", "Applied premultiplied alpha to bitmap in " + (dt / 1000.0f) + " ms");
}
public static native void ocvBitmapContrastSaturationSet(Bitmap bitmapImg);
public static void ocvBitmapContrastSaturationSetTimed(Bitmap bitmapImg) {
long t = System.nanoTime();
ocvBitmapContrastSaturationSet(bitmapImg);
long dt = (System.nanoTime() - t) / 1000; // Microseconds
Log.i("Native", "Assigned contrast/saturation bitmap in " + (dt / 1000.0f) + " ms");
}
public static native void ocvBitmapContrastSaturationSrc(Bitmap bitmapImg, Bitmap bitmapSrc, float contrast, float saturation);
public static void ocvBitmapContrastSaturationSrcTimed(Bitmap bitmapImg, Bitmap bitmapSrc, float contrast, float saturation) {
long t = System.nanoTime();
ocvBitmapContrastSaturationSrc(bitmapImg, bitmapSrc, contrast, saturation);
long dt = (System.nanoTime() - t) / 1000; // Microseconds
Log.i("Native", "Applied contrast/saturation (from src) to bitmap in " + (dt / 1000.0f) + " ms");
}
public static native void ocvBitmapContrastSaturation(Bitmap bitmapImg, float contrast, float saturation);
public static void ocvBitmapContrastSaturationTimed(Bitmap bitmapImg, float contrast, float saturation) {
long t = System.nanoTime();
ocvBitmapContrastSaturation(bitmapImg, contrast, saturation);
long dt = (System.nanoTime() - t) / 1000; // Microseconds
Log.i("Native", "Applied contrast/saturation to bitmap in " + (dt / 1000.0f) + " ms");
}
}
另外 右键单击项目 - >Android 工具 -> 添加本地支持
Add Native Support is missing. I have Android Native Development Tools installed. Then also it's missing.