Android Open Source - bitfynd-wallet-android File Attachment Provider

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License

The source code is released under:

GNU General Public License

Java Source Code

/*
 * Copyright 2014 the original author or authors.
 */*from ww  w.j av  a 2s.  c  o  m*/
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package de.schildbach.wallet;

import java.io.File;
import java.io.FileNotFoundException;

import javax.annotation.Nonnull;

import android.content.ContentProvider;
import android.content.ContentValues;
import android.database.Cursor;
import android.database.MatrixCursor;
import android.database.MatrixCursor.RowBuilder;
import android.net.Uri;
import android.os.ParcelFileDescriptor;
import android.provider.MediaStore;

/**
 * @author Andreas Schildbach
 */
public final class FileAttachmentProvider extends ContentProvider
{
  public static Uri contentUri(@Nonnull final String packageName, final File file)
  {
    return Uri.parse("content://" + packageName + ".file_attachment" + file.getAbsolutePath());
  }

  @Override
  public boolean onCreate()
  {
    return true;
  }

  @Override
  public String getType(final Uri uri)
  {
    final File file = new File(uri.getPath());

    if (!file.getAbsolutePath().startsWith(getContext().getCacheDir().getAbsolutePath()))
      return null;

    final String[] split = file.getName().split("\\.");
    if (split.length >= 2)
    {
      final String suffix = split[split.length - 1];
      if ("txt".equalsIgnoreCase(suffix) || "log".equalsIgnoreCase(suffix))
        return "text/plain";
      else if ("gz".equalsIgnoreCase(suffix))
        return "application/x-gzip";
    }

    return null;
  }

  @Override
  public ParcelFileDescriptor openFile(final Uri uri, final String mode) throws FileNotFoundException
  {
    return openFileHelper(uri, mode);
  }

  @Override
  public int delete(final Uri uri, final String selection, final String[] selectionArgs)
  {
    throw new UnsupportedOperationException();
  }

  @Override
  public Uri insert(final Uri uri, final ContentValues values)
  {
    throw new UnsupportedOperationException();
  }

  @Override
  public Cursor query(final Uri uri, final String[] projection, final String selection, final String[] selectionArgs, final String sortOrder)
  {
    final File file = new File(uri.getPath());

    if (!file.getAbsolutePath().startsWith(getContext().getCacheDir().getAbsolutePath()))
      throw new IllegalArgumentException("not in cache dir: " + uri);

    final MatrixCursor cursor = new MatrixCursor(projection);
    final RowBuilder row = cursor.newRow();
    for (int i = 0; i < projection.length; i++)
    {
      final String columnName = projection[i];
      if (columnName.equals(MediaStore.MediaColumns.DATA))
        row.add(file.getAbsolutePath());
      else if (columnName.equals(MediaStore.MediaColumns.SIZE))
        row.add(file.length());
      else if (columnName.equals(MediaStore.MediaColumns.DISPLAY_NAME))
        row.add(uri.getLastPathSegment());
      else
        throw new IllegalArgumentException("cannot handle: " + columnName);
    }

    return cursor;
  }

  @Override
  public int update(final Uri uri, final ContentValues values, final String selection, final String[] selectionArgs)
  {
    throw new UnsupportedOperationException();
  }
}

Java Source Code List

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