implements save to in share sheet (see #37)

app/src/main/java/org/y20k/trackbook/MainActivity.java

@@ -56,6 +56,7 @@ import android.widget.Toast;
 
 import org.osmdroid.config.Configuration;
 import org.y20k.trackbook.helpers.DialogHelper;
+import org.y20k.trackbook.helpers.ExportHelper;
 import org.y20k.trackbook.helpers.LogHelper;
 import org.y20k.trackbook.helpers.NightModeHelper;
 import org.y20k.trackbook.helpers.TrackbookKeys;
@@ -108,6 +109,9 @@ public class MainActivity extends AppCompatActivity implements TrackbookKeys {
         // check state of External Storage
         checkExternalStorageState();
 
+        // empty cache
+        ExportHelper.emptyCacheDirectory(this);
+
         // load saved state of app
         loadFloatingActionButtonState(this);
 

app/src/main/java/org/y20k/trackbook/helpers/ExportHelper.java

@@ -77,8 +77,8 @@ public final class ExportHelper extends FileProvider implements TrackbookKeys {
     /* Creates Intent used to bring up an Android share sheet */
     public static Intent getGpxFileIntent(Context context, Track track) {
 
-        // get file for given track
-        File gpxFile = createFile(track, getDownloadFolder()); // todo use cache folder
+        // create file in Cache directory for given track
+        File gpxFile = createFile(track, context.getCacheDir());
 
         // get GPX string representation for given track
         String gpxString = createGpxString(track);
@@ -97,12 +97,23 @@ public final class ExportHelper extends FileProvider implements TrackbookKeys {
         Intent intent = new Intent();
         intent.setAction(Intent.ACTION_SEND);
         intent.setType("application/gpx+xml");
+        intent.putExtra(Intent.EXTRA_STREAM, FileProvider.getUriForFile(context, authority, gpxFile));
         intent.setData(FileProvider.getUriForFile(context, authority, gpxFile));
 
         return intent;
     }
 
 
+    /* Empties the internal chache directory */
+    public static void emptyCacheDirectory(Context context) {
+        // todo implement a date check - delete only stuff that is a week old
+        File[] cacheFiles = context.getCacheDir().listFiles();
+        for (File file: cacheFiles) {
+            file.delete();
+        }
+    }
+
+
     /* Get "Download" folder */
     private static File getDownloadFolder() {
         File folder = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DOWNLOADS);
@@ -118,11 +129,12 @@ public final class ExportHelper extends FileProvider implements TrackbookKeys {
     private static File createFile(Track track, File folder) {
         Date recordingStart = track.getRecordingStart();
         DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd-HH-mm-ss", Locale.US);
+
         return new File(folder, dateFormat.format(recordingStart) + FILE_TYPE_GPX_EXTENSION);
     }
 
 
-    /* Writes given GPX string to Download folder */
+    /* Writes given GPX string to given file */
     private static boolean writeGpxToFile (String gpxString, File gpxFile) {
         // write track
         try (BufferedWriter bw = new BufferedWriter(new FileWriter(gpxFile))) {

app/src/main/res/xml/provider_paths.xml

@@ -1,4 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
 <paths>
-    <external-path name="external_files" path="Download/"/>
+
+    <!-- Download in External Storage -->
+    <external-path name="external_storage_downloads" path="Download/"/>
+
+    <!-- Cache in Internal Storage -->
+    <cache-path name="external_storage_downloads" path="."/>
+
 </paths>

build.gradle

@@ -20,8 +20,8 @@ allprojects {
     }
     project.ext {
         applicationId = 'org.y20k.trackbook'
-        versionCode = 25
-        versionName = '1.1.9'
+        versionCode = 26
+        versionName = '1.1.10'
         minSdkVersion = 22
         compileSdkVersion = 27
         targetSdkVersion = 27