Android: File(s) download

docs-android/app/src/main/java/com/sismics/docs/MainApplication.java

@@ -21,7 +21,6 @@ public class MainApplication extends Application {
         ApplicationContext.getInstance().setUserInfo(getApplicationContext(), json);
 
         // TODO Fullscreen preview
-        // TODO Downloading
         // TODO Sharing
         // TODO Error feedback
         // TODO Infinite scrolling on documents

docs-android/app/src/main/java/com/sismics/docs/activity/DocumentActivity.java

@@ -1,10 +1,16 @@
 package com.sismics.docs.activity;
 
+import android.app.DownloadManager;
+import android.content.Context;
 import android.content.Intent;
+import android.net.Uri;
 import android.os.Bundle;
+import android.os.Environment;
 import android.support.v4.view.ViewPager;
 import android.support.v7.app.ActionBarActivity;
 import android.text.format.DateFormat;
+import android.view.Menu;
+import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.ImageView;
@@ -15,6 +21,7 @@ import com.sismics.docs.R;
 import com.sismics.docs.adapter.FilePagerAdapter;
 import com.sismics.docs.model.application.ApplicationContext;
 import com.sismics.docs.resource.FileResource;
+import com.sismics.docs.util.PreferenceUtil;
 import com.sismics.docs.util.TagUtil;
 
 import org.apache.http.Header;
@@ -30,6 +37,20 @@ import java.util.Date;
  * @author bgamard
  */
 public class DocumentActivity extends ActionBarActivity {
+    /**
+     * File view pager.
+     */
+    ViewPager fileViewPager;
+
+    /**
+     * File pager adapter.
+     */
+    FilePagerAdapter filePagerAdapter;
+
+    /**
+     * Document displayed.
+     */
+    JSONObject document;
 
     @Override
     protected void onCreate(final Bundle args) {
@@ -55,7 +76,6 @@ public class DocumentActivity extends ActionBarActivity {
             return;
         }
 
-        JSONObject document;
         try {
             document = new JSONObject(documentJson);
         } catch (JSONException e) {
@@ -117,17 +137,33 @@ public class DocumentActivity extends ActionBarActivity {
         FileResource.list(this, id, new JsonHttpResponseHandler() {
             @Override
             public void onSuccess(int statusCode, Header[] headers, JSONObject response) {
-                ViewPager fileViewPager = (ViewPager) findViewById(R.id.fileViewPager);
+                fileViewPager = (ViewPager) findViewById(R.id.fileViewPager);
                 fileViewPager.setOffscreenPageLimit(1);
-                fileViewPager.setAdapter(new FilePagerAdapter(DocumentActivity.this, response.optJSONArray("files")));
+                filePagerAdapter = new FilePagerAdapter(DocumentActivity.this, response.optJSONArray("files"));
+                fileViewPager.setAdapter(filePagerAdapter);
                 findViewById(R.id.progressBar).setVisibility(View.GONE);
             }
         });
     }
 
+    @Override
+    public boolean onCreateOptionsMenu(Menu menu) {
+        MenuInflater inflater = getMenuInflater();
+        inflater.inflate(R.menu.document_activity, menu);
+        return super.onCreateOptionsMenu(menu);
+    }
+
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
         switch (item.getItemId()) {
+            case R.id.download_file:
+                downloadCurrentFile();
+                return true;
+
+            case R.id.download_document:
+                downloadZip();
+                return true;
+
             case android.R.id.home:
                 finish();
                 return true;
@@ -136,4 +172,55 @@ public class DocumentActivity extends ActionBarActivity {
                 return super.onOptionsItemSelected(item);
         }
     }
+
+    /**
+     * Download the current displayed file.
+     */
+    private void downloadCurrentFile() {
+        if (fileViewPager == null || filePagerAdapter == null) return;
+
+        JSONObject file = filePagerAdapter.getObjectAt(fileViewPager.getCurrentItem());
+        if (file == null) return;
+
+        // Build the destination filename
+        String mimeType = file.optString("mimetype");
+        int position = fileViewPager.getCurrentItem();
+        if (mimeType == null || !mimeType.contains("/")) return;
+        String ext = mimeType.split("/")[1];
+        String fileName = getTitle() + "-" + position + "." + ext;
+
+        // Download the file
+        String fileUrl = PreferenceUtil.getServerUrl(this) + "/api/file/" + file.optString("id") + "/data";
+        downloadFile(fileUrl, fileName, getTitle().toString(), getString(R.string.downloading_file, position + 1));
+    }
+
+    /**
+     * Download the document (all files zipped).
+     */
+    private void downloadZip() {
+        if (document == null) return;
+        String url = PreferenceUtil.getServerUrl(this) + "/api/file/zip?id=" + document.optString("id");
+        String fileName = getTitle() + ".zip";
+        downloadFile(url, fileName, getTitle().toString(), getString(R.string.downloading_document));
+    }
+
+    /**
+     * Download a file using Android download manager.
+     *
+     * @param url URL to download
+     * @param fileName Destination file name
+     * @param title Notification title
+     * @param description Notification description
+     */
+    private void downloadFile(String url, String fileName, String title, String description) {
+        String authToken = PreferenceUtil.getAuthToken(this);
+        DownloadManager downloadManager = (DownloadManager) getSystemService(Context.DOWNLOAD_SERVICE);
+        DownloadManager.Request request = new DownloadManager.Request(Uri.parse(url));
+        request.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
+        request.setDestinationInExternalPublicDir(Environment.DIRECTORY_DOWNLOADS, fileName);
+        request.addRequestHeader("Cookie", "auth_token=" + authToken);
+        request.setTitle(title);
+        request.setDescription(description);
+        downloadManager.enqueue(request);
+    }
 }

docs-android/app/src/main/java/com/sismics/docs/adapter/FilePagerAdapter.java

@@ -89,4 +89,18 @@ public class FilePagerAdapter extends PagerAdapter {
     public boolean isViewFromObject(View view, Object object) {
         return view == object;
     }
+
+    /**
+     * Return the object at a given position.
+     *
+     * @param position Position
+     * @return Object
+     */
+    public JSONObject getObjectAt(int position) {
+        if (files == null) {
+            return null;
+        }
+
+        return files.optJSONObject(position);
+    }
 }

docs-android/app/src/main/res/layout/document_activity.xml

@@ -15,7 +15,8 @@
         <TextView
             android:id="@+id/createdDateLabel"
             android:layout_width="100dp"
-            android:layout_height="wrap_content"
+            android:layout_height="24dp"
+            android:gravity="center_vertical"
             android:layout_alignParentTop="true"
             android:layout_marginRight="8dp"
             android:layout_marginEnd="8dp"
@@ -27,7 +28,8 @@
             android:layout_toRightOf="@id/createdDateLabel"
             android:layout_toEndOf="@id/createdDateLabel"
             android:layout_width="wrap_content"
-            android:layout_height="wrap_content"
+            android:layout_height="24dp"
+            android:gravity="center_vertical"
             android:layout_alignParentTop="true"
             android:fontFamily="sans-serif-light"
             android:text="01/12/2014"/>

docs-android/app/src/main/res/menu/document_activity.xml

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/download_file"
+        app:showAsAction="collapseActionView"
+        android:title="@string/download_file">
+    </item>
+
+    <item
+        android:id="@+id/download_document"
+        app:showAsAction="collapseActionView"
+        android:title="@string/download_document">
+    </item>
+
+</menu>

docs-android/app/src/main/res/values/strings.xml

@@ -26,5 +26,9 @@
     <string name="validate_error_length_max">Too long (max. %d)</string>
     <string name="validate_error_required">Required</string>
     <string name="validate_error_alphanumeric">Only letters and numbers</string>
+    <string name="download_file">Download current file</string>
+    <string name="downloading_file">Downloading file number %1s</string>
+    <string name="download_document">Download all files</string>
+    <string name="downloading_document">Downloading document</string>
 
 </resources>