implement saving of files

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/ui/DecryptListFragment.java

@@ -19,6 +19,7 @@ package org.sufficientlysecure.keychain.ui;
 
 
 import java.io.File;
+import java.io.IOException;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.List;
@@ -220,8 +221,7 @@ public class DecryptListFragment
                 if (resultCode == Activity.RESULT_OK && data != null) {
                     Uri saveUri = data.getData();
                     Uri outputUri = mOutputUris.get(mCurrentInputUri);
-                    // TODO save from outputUri to saveUri
-
+                    saveFile(saveUri, outputUri);
                     mCurrentInputUri = null;
                 }
                 return;
@@ -233,6 +233,21 @@ public class DecryptListFragment
         }
     }
 
+    private void saveFile(Uri outputUri, Uri saveUri) {
+        Activity activity = getActivity();
+        if (activity == null) {
+            return;
+        }
+
+        try {
+            FileHelper.copyUriData(activity, outputUri, saveUri);
+            Notify.create(activity, R.string.file_saved, Style.ERROR).show();
+        } catch (IOException e) {
+            Log.e(Constants.TAG, "error saving file", e);
+            Notify.create(activity, R.string.error_saving_file, Style.ERROR).show();
+        }
+    }
+
     @Override
     protected void cryptoOperation(CryptoInputParcel cryptoInput) {
         super.cryptoOperation(cryptoInput, false);
@@ -448,6 +463,12 @@ public class DecryptListFragment
         if (mAdapter.mMenuClickedModel == null || !mAdapter.mMenuClickedModel.hasResult()) {
             return false;
         }
+
+        // don't process menu items until all items are done!
+        if (!mPendingInputUris.isEmpty()) {
+            return true;
+        }
+
         Activity activity = getActivity();
         if (activity == null) {
             return false;

OpenKeychain/src/main/java/org/sufficientlysecure/keychain/util/FileHelper.java

@@ -20,6 +20,7 @@ package org.sufficientlysecure.keychain.util;
 import android.annotation.TargetApi;
 import android.app.Activity;
 import android.content.ActivityNotFoundException;
+import android.content.ContentResolver;
 import android.content.Context;
 import android.content.Intent;
 import android.database.Cursor;
@@ -41,8 +42,11 @@ import org.sufficientlysecure.keychain.R;
 import org.sufficientlysecure.keychain.compatibility.DialogFragmentWorkaround;
 import org.sufficientlysecure.keychain.ui.dialog.FileDialogFragment;
 
+import java.io.BufferedInputStream;
+import java.io.BufferedOutputStream;
 import java.io.ByteArrayOutputStream;
 import java.io.File;
+import java.io.FileInputStream;
 import java.io.IOException;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
@@ -267,6 +271,33 @@ public class FileHelper {
 
     }
 
+    public static void copyUriData(Context context, Uri fromUri, Uri toUri) throws IOException {
+        BufferedInputStream bis = null;
+        BufferedOutputStream bos = null;
+
+        try {
+            ContentResolver resolver = context.getContentResolver();
+            bis = new BufferedInputStream(resolver.openInputStream(fromUri));
+            bos = new BufferedOutputStream(resolver.openOutputStream(toUri));
+            byte[] buf = new byte[1024];
+            int len;
+            while ( (len = bis.read(buf)) > 0) {
+                bos.write(buf, 0, len);
+            }
+        } finally {
+            try {
+                if (bis != null) {
+                    bis.close();
+                }
+                if (bos != null) {
+                    bos.close();
+                }
+            } catch (IOException e) {
+                // ignore, it's just stream closin'
+            }
+        }
+    }
+
     public interface FileDialogCallback {
         void onFileSelected(File file, boolean checked);
     }