外掛載入帶有動態庫的apk時，會報UnsatisfiedLinkError找不到動態庫的錯誤。

解決方法是在DexClassLoader中

dalvik.system.DexClassLoader.DexClassLoader(String dexPath, String optimizedDirectory, String libraryPath, ClassLoader parent)

因此我需要找到對應的手機cpu型別，並解壓對應的動態庫,對應的程式碼如下：

	private static boolean IsDirEquals(String srcfile,String objDir)
	{
		try{
			int index = srcfile.lastIndexOf("/");
			String dir = null;
			String firstDirName = null;
			if(index != -1)
				dir = srcfile.substring(0,index );
			
			index = srcfile.indexOf("/");
			if(index != -1)
				firstDirName = srcfile.substring(0, index);
			

			if(null != dir && dir.equalsIgnoreCase(objDir))
			{
				return true;
			}
			else if(null != firstDirName && firstDirName.equalsIgnoreCase(objDir))
			{
					return true;
			}
			}catch(Exception e){
			e.printStackTrace();
		}
		
		return false;
		
		
	}
	
	public static void UnzipSpecificFile(String zipFile, String targetDir,ArrayList<String> objDirList) {
		int BUFFER = 4096; // 這裡緩衝區我們使用4KB，
		String strEntry; // 儲存每個zip的條目名稱
		ZipInputStream zis = null;
		try {
			BufferedOutputStream dest = null; // 緩衝輸出流
			FileInputStream fis = new FileInputStream(zipFile);
			zis = new ZipInputStream(new BufferedInputStream(fis));
			ZipEntry entry; // 每個zip條目的例項
			

			
			while ((entry = zis.getNextEntry()) != null) {

				try {
					// Log.i("Unzip: ","="+ entry);
					int count;
					byte data[] = new byte[BUFFER];
					strEntry = entry.getName();
					
					boolean find = false;
					for(String dir:objDirList)
					{
						if(IsDirEquals(strEntry.toString(),dir))
						{
							find = true;
							break;
						}
					}
					
					if(false == find)
						continue;
					
					File entryFile = new File(targetDir + strEntry);
					File entryDir = new File(entryFile.getParent());
					
					if (!entryDir.exists()) {
						entryDir.mkdirs();
					}

					FileOutputStream fos = new FileOutputStream(entryFile);
					dest = new BufferedOutputStream(fos, BUFFER);
					while ((count = zis.read(data, 0, BUFFER)) != -1) {
						dest.write(data, 0, count);
					}
					dest.flush();

				} catch (Exception ex) {
					ex.printStackTrace();
				} finally {
					if (null != dest)
						dest.close();
				}
			}

		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (null != zis)
					zis.close();

			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
	}
	
	
	// 獲取手機CPU型別資訊
	final static public String getCpuInfo() {
		String str1 = "/proc/cpuinfo";
		String str2 = "";
		String[] cpuInfo = { "", "" }; // 1-cpu型號 //2-cpu頻率
		String[] arrayOfString;
		FileReader fr = null;
		BufferedReader localBufferedReader = null;
		try {
			fr = new FileReader(str1);
			localBufferedReader = new BufferedReader(fr, 8192);
			str2 = localBufferedReader.readLine();
			arrayOfString = str2.split("\\s+");
			for (int i = 2; i < arrayOfString.length; i++) {
				cpuInfo[0] = cpuInfo[0] + arrayOfString[i] + " ";
			}
			str2 = localBufferedReader.readLine();
			arrayOfString = str2.split("\\s+");
			cpuInfo[1] += arrayOfString[2]; // cpu頻率。
			localBufferedReader.close();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (fr != null)
					fr.close();

				if (localBufferedReader != null)
					localBufferedReader.close();

			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}

		// Log.i(TAG, "cpuinfo:" + cpuInfo[0] + " " + cpuInfo[1]);
		if ((cpuInfo[0].toLowerCase().contains("armv7"))) {
			return "armeabi-v7a";
		} else if ((cpuInfo[0].toLowerCase().contains("arm"))) {
			return "armeabi";
		} else if ((cpuInfo[0].toLowerCase().contains("mips"))) {
			return "mips";
		} else {
			return "x86";
		}

	}
 

System.loadLibrary

來載入動態庫就ok了，其中這個方法會根據之前的classLoader傳入的路徑去查詢檔案。

後面找lib庫貌似有點多餘，應該只需要找到apk的lib資料夾就可以避免列舉整個apk檔案，這個是後面需要改進的方向。