AndroidUtil.java

package org.bbs.felix.util;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Enumeration;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;
import java.util.zip.ZipInputStream;

import android.content.Context;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager.NameNotFoundException;
import android.util.Log;

public class AndroidUtil {
	private static final String TAG = AndroidUtil.class.getSimpleName();

	public static String getInstallApkPath(Context context, String packageName) {
		String path = "";
		try {
			ApplicationInfo pInfo = context.getPackageManager().getApplicationInfo(packageName, 0);
			path = pInfo.sourceDir;
		} catch (NameNotFoundException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
		
		return path;
	}
	
	public static void copyFile(File src, File dest) {
		if (null == src || null == dest) {
			return;
		}
		
		FileInputStream in = null;
		FileOutputStream out = null;
		try {
			in = new FileInputStream(src);
			out = new FileOutputStream(dest);
			int byteCount = 8096;
			byte[] buffer = new byte[byteCount];
			int count = 0;
			while ((count = in.read(buffer, 0, byteCount)) != -1){
				out.write(buffer, 0, count);
			}
			out.flush();
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				in.close();
				out.close();
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
	}
	
	public static void extractZipEntry(ZipFile zipFile, String entryName, File destDir) {
		if (zipFile == null || entryName == null || destDir == null) return;

		Log.d(TAG, "zipFile: " + zipFile);
		destDir.getParentFile().mkdirs();
		ZipEntry zE = zipFile.getEntry(entryName);
		
		Enumeration<? extends ZipEntry> entries = zipFile.entries();
		if (entries.hasMoreElements()) {
			ZipEntry nextElement = entries.nextElement();
//			Log.d(TAG, "ze: " + nextElement);
		}
		
		try {
			InputStream in = null;
//			in = zipFile.getInputStream(zE);
			in = new FileInputStream(new File(zipFile.getName()));
			ZipInputStream zIn = new ZipInputStream(in);
			try {
				ZipEntry ze;
				while ((ze = zIn.getNextEntry()) != null) {
					if (!ze.getName().startsWith(entryName) || ze.isDirectory()) {
						continue;
					}
					Log.d(TAG, "ze: " + ze);
					String name = ze.getName().substring(entryName.length());
					
					File destFile = new File(destDir, name);
					destFile.getParentFile().mkdirs();
					FileOutputStream fout = new FileOutputStream(destFile);
					byte[] buffer = new byte[1024];
					int count;
					while ((count = zIn.read(buffer)) != -1) {
						fout.write(buffer, 0, count);
					}
					fout.flush();
					fout.close();
				}
			} finally {
				zIn.close();
			}

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