Code cleanup: specify directories inside the cache directory at FileUtils.java

MyTracks/src/com/google/android/apps/mytracks/TrackDetailActivity.java

@@ -83,6 +83,7 @@ public class TrackDetailActivity extends AbstractSendToGoogleActivity implements
   private static final String CURRENT_TAB_TAG_KEY = "current_tab_tag_key";
   private static final String PHOTO_URI_KEY = "photo_uri_key";
   private static final String HAS_PHOTO_KEY = "has_photo_key";
+  private static final String JPEG_EXTENSION = "jpeg";
   
   // The following are set in onCreate
   private boolean hasCamera;
@@ -399,7 +400,7 @@ public class TrackDetailActivity extends AbstractSendToGoogleActivity implements
         FileUtils.ensureDirectoryExists(dir);
 
         String fileName = SimpleDateFormat.getDateTimeInstance().format(new Date());
-        File file = new File(dir, FileUtils.buildUniqueFileName(dir, fileName, "jpeg"));
+        File file = new File(dir, FileUtils.buildUniqueFileName(dir, fileName, JPEG_EXTENSION));
 
         photoUri = Uri.fromFile(file);
         intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE).putExtra(

MyTracks/src/com/google/android/apps/mytracks/content/MyTracksProvider.java

@@ -17,6 +17,7 @@
 package com.google.android.apps.mytracks.content;
 
 import com.google.android.apps.mytracks.io.sync.SyncUtils;
+import com.google.android.apps.mytracks.util.FileUtils;
 import com.google.android.apps.mytracks.util.PreferencesUtils;
 import com.google.android.maps.mytracks.R;
 import com.google.common.annotations.VisibleForTesting;
@@ -435,8 +436,8 @@ public class MyTracksProvider extends ContentProvider {
       }
       throw new FileNotFoundException(uri.getPath());
     } finally {
-      File[] files = getContext().getCacheDir().listFiles();
-      for (File file : files) {
+      File dir = new File(getContext().getCacheDir(), FileUtils.PLAY_TRACKS_DIR);
+      for (File file : dir.listFiles()) {
         file.delete();
       }
     }

MyTracks/src/com/google/android/apps/mytracks/io/file/exporter/SaveActivity.java

@@ -81,7 +81,7 @@ public class SaveActivity extends Activity {
       return;
     }
 
-    File directory = playTrack ? getCacheDir()
+    File directory = playTrack ? new File(getCacheDir(), FileUtils.PLAY_TRACKS_DIR)
         : new File(FileUtils.getPath(trackFileFormat.getExtension()));
     if (!FileUtils.ensureDirectoryExists(directory)) {
       Toast.makeText(this, R.string.external_storage_not_writable, Toast.LENGTH_LONG).show();
@@ -90,12 +90,12 @@ public class SaveActivity extends Activity {
     }
 
     if (playTrack) {
-      for (File file : getCacheDir().listFiles()) {
+      for (File file : directory.listFiles()) {
         file.delete();
       }
     }
 
-    directoryDisplayName = playTrack ? getCacheDir().getName()
+    directoryDisplayName = playTrack ? directory.getName()
         : FileUtils.getPathDisplayName(trackFileFormat.getExtension());
 
     Object retained = getLastNonConfigurationInstance();

MyTracks/src/com/google/android/apps/mytracks/io/sync/SyncUtils.java

@@ -101,7 +101,6 @@ public class SyncUtils {
 
   private static final String TAG = SyncUtils.class.getSimpleName();
   private static final String SYNC_AUTHORITY = "com.google.android.maps.mytracks";
-  private static final String TEMP_DIR = "temp";
 
   private SyncUtils() {}
 
@@ -454,7 +453,7 @@ public class SyncUtils {
       Context context, MyTracksProviderUtils myTracksProviderUtils, Track track, boolean useKmz)
       throws FileNotFoundException {
     String extension = useKmz ? KmzTrackExporter.KMZ_EXTENSION : TrackFileFormat.KML.getExtension();
-    java.io.File directory = new java.io.File(context.getCacheDir(), TEMP_DIR);
+    java.io.File directory = new java.io.File(context.getCacheDir(), FileUtils.TEMP_FILES_DIR);
 
     if (!FileUtils.ensureDirectoryExists(directory)) {
       Log.d(TAG, "Unable to create " + directory.getAbsolutePath());

MyTracks/src/com/google/android/apps/mytracks/util/FileUtils.java

@@ -53,6 +53,16 @@ public class FileUtils {
   @VisibleForTesting
   static final int MAX_FAT32_PATH_LENGTH = 260;
 
+  /**
+   * The play tracks directory under the My Tracks cache directory.
+   */
+  public static final String PLAY_TRACKS_DIR = "temp";
+  
+  /**
+   * The temp files directory under the My Tracks cache directory.
+   */
+  public static final String TEMP_FILES_DIR = "temp_files"; 
+  
   /**
    * Returns true if the external storage is available.
    */