android/src/org/d2df/app/CopyAssets.java

   1 package org.d2df.app;
   2
   3 import android.content.Context;
   4 import android.content.res.AssetManager;
   5 import android.os.Environment;
   6
   7 import java.io.File;
   8 import java.io.FileOutputStream;
   9 import java.io.IOException;
  10 import java.io.InputStream;
  11 import java.io.OutputStream;
  12
  13 import android.util.Log;
  14
  15 public class CopyAssets {
  16
  17         private static boolean ExtStorageMounted() {
  18                 return Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState());
  19         }
  20
  21         private static boolean ExtStorageReadonly() {
  22                 return Environment.MEDIA_MOUNTED_READ_ONLY.equals(Environment.getExternalStorageState());
  23         }
  24
  25         private static void CopyFile(InputStream in, OutputStream out)
  26                 throws IOException
  27         {
  28                 byte[] buffer = new byte[1024];
  29                 int read;
  30                 while ((read = in.read(buffer)) != -1) {
  31                         out.write(buffer, 0, read);
  32                 }
  33         }
  34
  35         public static void copyAssets(Context context, String prefix) {
  36                 AssetManager assetManager = context.getAssets();
  37                 String[] files = null;
  38                 try {
  39                         files = assetManager.list(prefix);
  40                 } catch (IOException e) {
  41                         Log.e("tag", "Failed to get asset file list.", e);
  42                 }
  43                 if (files != null) {
  44                         for (String filename : files) {
  45                                 InputStream in = null;
  46                                 OutputStream out = null;
  47                                 try {
  48                                         if (ExtStorageMounted() && !ExtStorageReadonly()) {
  49                                                 /* Get External Storage Path */
  50                                                 File f = new File(context.getExternalFilesDir(null).getAbsolutePath(), prefix);
  51                                                 if (!f.exists()) {
  52                                                         f.mkdirs();
  53                                                 }
  54                                                 File outFile = new File(context.getExternalFilesDir(null).getAbsolutePath(), prefix + "/" + filename);
  55                                                 if (!outFile.exists()) {
  56                                                         in = assetManager.open(prefix + "/" + filename);
  57                                                         out = new FileOutputStream(outFile);
  58                                                         CopyFile(in, out);
  59                                                 }
  60                                         } else {
  61                                                 /* Get Internal Storage Path */
  62                                                 File f = new File(context.getFilesDir().getAbsolutePath(), prefix);
  63                                                 if (!f.exists()) {
  64                                                         f.mkdirs();
  65                                                 }
  66                                                 File outFile = new File(context.getFilesDir().getAbsolutePath(), prefix + "/" + filename);
  67                                                 if (!outFile.exists()) {
  68                                                         in = assetManager.open(prefix + "/" + filename);
  69                                                         out = new FileOutputStream(outFile);
  70                                                         CopyFile(in, out);
  71                                                 }
  72                                         }
  73                                 } catch(IOException e) {
  74                                         Log.e("tag", "Failed to copy asset file: " + filename, e);
  75                                 } finally {
  76                                         if (in != null) {
  77                                                 try {
  78                                                         in.close();
  79                                                         in = null;
  80                                                 } catch (IOException e) {}
  81                                         }
  82                                         if (out != null) {
  83                                                 try {
  84                                                         out.flush();
  85                                                         out.close();
  86                                                         out = null;
  87                                                 } catch (IOException e) {}
  88                                         }
  89                                 }
  90                         }
  91                 }
  92         }
  93
  94 }