android.os.ParcelFileDescriptor#MODE_TRUNCATE源码实例Demo

下面列出了android.os.ParcelFileDescriptor#MODE_TRUNCATE 实例代码，或者点击链接到github查看源代码，也可以在右侧发表评论。

源代码1 项目： mollyim-android 文件： MmsBodyProvider.java

@Override
public ParcelFileDescriptor openFile(@NonNull Uri uri, @NonNull String mode) throws FileNotFoundException {
  Log.i(TAG, "openFile(" + uri + ", " + mode + ")");

  switch (uriMatcher.match(uri)) {
  case SINGLE_ROW:
    Log.i(TAG, "Fetching message body for a single row...");
    File tmpFile = getFile(uri);

    final int fileMode;
    switch (mode) {
    case "w": fileMode = ParcelFileDescriptor.MODE_TRUNCATE |
                         ParcelFileDescriptor.MODE_CREATE   |
                         ParcelFileDescriptor.MODE_WRITE_ONLY; break;
    case "r": fileMode = ParcelFileDescriptor.MODE_READ_ONLY;  break;
    default:  throw new IllegalArgumentException("requested file mode unsupported");
    }

    Log.i(TAG, "returning file " + tmpFile.getAbsolutePath());
    return ParcelFileDescriptor.open(tmpFile, fileMode);
  }

  throw new FileNotFoundException("Request for bad message.");
}

源代码2 项目： MHViewer 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码3 项目： attach 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码4 项目： edslite 文件： Util.java

public static int getParcelFileDescriptorModeFromAccessMode(AccessMode mode)
{
	switch (mode)
	{
		case Read:
			return ParcelFileDescriptor.MODE_READ_ONLY;
		case Write:
			return ParcelFileDescriptor.MODE_WRITE_ONLY | ParcelFileDescriptor.MODE_TRUNCATE | ParcelFileDescriptor.MODE_CREATE;
		case WriteAppend:
			return ParcelFileDescriptor.MODE_WRITE_ONLY | ParcelFileDescriptor.MODE_APPEND | ParcelFileDescriptor.MODE_CREATE;
		case ReadWriteTruncate:
			return ParcelFileDescriptor.MODE_READ_WRITE | ParcelFileDescriptor.MODE_TRUNCATE  | ParcelFileDescriptor.MODE_CREATE;
		case ReadWrite:
		default:
			return ParcelFileDescriptor.MODE_READ_WRITE | ParcelFileDescriptor.MODE_CREATE;
	}
}

源代码5 项目： telescope 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
  int modeBits;
  if ("r".equals(mode)) {
    modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
  } else if ("w".equals(mode) || "wt".equals(mode)) {
    modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
        | ParcelFileDescriptor.MODE_CREATE
        | ParcelFileDescriptor.MODE_TRUNCATE;
  } else if ("wa".equals(mode)) {
    modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
        | ParcelFileDescriptor.MODE_CREATE
        | ParcelFileDescriptor.MODE_APPEND;
  } else if ("rw".equals(mode)) {
    modeBits = ParcelFileDescriptor.MODE_READ_WRITE | ParcelFileDescriptor.MODE_CREATE;
  } else if ("rwt".equals(mode)) {
    modeBits = ParcelFileDescriptor.MODE_READ_WRITE
        | ParcelFileDescriptor.MODE_CREATE
        | ParcelFileDescriptor.MODE_TRUNCATE;
  } else {
    throw new IllegalArgumentException("Invalid mode: " + mode);
  }
  return modeBits;
}

源代码6 项目： editor 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码7 项目： FireFiles 文件： ParcelFileDescriptorUtil.java

public static int parseMode(String mode) {
    final int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Bad mode '" + mode + "'");
    }
    return modeBits;
}

源代码8 项目： secrecy 文件： OurFileProvider.java

private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码9 项目： FireFiles 文件： ParcelFileDescriptorUtil.java

public static int parseMode(String mode) {
    final int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Bad mode '" + mode + "'");
    }
    return modeBits;
}

源代码10 项目： guideshow 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码11 项目： FireFiles 文件： ParcelFileDescriptorUtil.java

public static int parseMode(String mode) {
    final int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Bad mode '" + mode + "'");
    }
    return modeBits;
}

源代码12 项目： android-recipes-app 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码13 项目： YalpStore 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码14 项目： V.FlyoutTest 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码15 项目： Silence 文件： MmsBodyProvider.java

@Override
public ParcelFileDescriptor openFile(Uri uri, String mode) throws FileNotFoundException {
  Log.w(TAG, "openFile(" + uri + ", " + mode + ")");

  switch (uriMatcher.match(uri)) {
  case SINGLE_ROW:
    Log.w(TAG, "Fetching message body for a single row...");
    File tmpFile = getFile(uri);

    final int fileMode;
    switch (mode) {
    case "w": fileMode = ParcelFileDescriptor.MODE_TRUNCATE |
                         ParcelFileDescriptor.MODE_CREATE   |
                         ParcelFileDescriptor.MODE_WRITE_ONLY; break;
    case "r": fileMode = ParcelFileDescriptor.MODE_READ_ONLY;  break;
    default:  throw new IllegalArgumentException("requested file mode unsupported");
    }

    Log.w(TAG, "returning file " + tmpFile.getAbsolutePath());
    return ParcelFileDescriptor.open(tmpFile, fileMode);
  }

  throw new FileNotFoundException("Request for bad message.");
}

源代码16 项目： sana.mobile 文件： ModelContentProvider.java

protected final int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Bad mode: " + mode);
    }
    return modeBits;
}

源代码17 项目： CodenameOne 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码18 项目： adt-leanback-support 文件： FileProvider.java

/**
 * Copied from ContentResolver.java
 */
private static int modeToMode(String mode) {
    int modeBits;
    if ("r".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
        modeBits = ParcelFileDescriptor.MODE_READ_WRITE
                | ParcelFileDescriptor.MODE_CREATE
                | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
        throw new IllegalArgumentException("Invalid mode: " + mode);
    }
    return modeBits;
}

源代码19 项目： android-test 文件： SimpleFileContentProvider.java

private static int parseMode(String mode) {
  if (VERSION.SDK_INT >= VERSION_CODES.KITKAT) {
    return ParcelFileDescriptor.parseMode(mode);
  } else {
    final int modeBits;
    if ("r".equals(mode)) {
      modeBits = ParcelFileDescriptor.MODE_READ_ONLY;
    } else if ("w".equals(mode) || "wt".equals(mode)) {
      modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
          | ParcelFileDescriptor.MODE_CREATE
          | ParcelFileDescriptor.MODE_TRUNCATE;
    } else if ("wa".equals(mode)) {
      modeBits = ParcelFileDescriptor.MODE_WRITE_ONLY
          | ParcelFileDescriptor.MODE_CREATE
          | ParcelFileDescriptor.MODE_APPEND;
    } else if ("rw".equals(mode)) {
      modeBits = ParcelFileDescriptor.MODE_READ_WRITE
          | ParcelFileDescriptor.MODE_CREATE;
    } else if ("rwt".equals(mode)) {
      modeBits = ParcelFileDescriptor.MODE_READ_WRITE
          | ParcelFileDescriptor.MODE_CREATE
          | ParcelFileDescriptor.MODE_TRUNCATE;
    } else {
      throw new IllegalArgumentException("Bad mode '" + mode + "'");
    }
    return modeBits;
  }
}

源代码20 项目： android_maplib 文件： VectorLayer.java

public ParcelFileDescriptor openFile(
        Uri uri,
        String mode)
        throws FileNotFoundException
{
    int uriType = mUriMatcher.match(uri);
    switch (uriType) {
        case TYPE_ATTACH_ID:
            List<String> pathSegments = uri.getPathSegments();
            String featureId = pathSegments.get(pathSegments.size() - 3);
            String attachId = uri.getLastPathSegment();
            int nMode = ParcelFileDescriptor.MODE_READ_ONLY;
            //mode 	May be "w", "wa", "rw", or "rwt".
            switch (mode) {
                case "w":
                case "rw":
                    nMode = ParcelFileDescriptor.MODE_READ_WRITE;
                    break;
                case "wa":
                    nMode = ParcelFileDescriptor.MODE_READ_WRITE
                            | ParcelFileDescriptor.MODE_APPEND;
                    break;
                case "rwt":
                    nMode = ParcelFileDescriptor.MODE_READ_WRITE
                            | ParcelFileDescriptor.MODE_TRUNCATE;
                    break;
            }

            return ParcelFileDescriptor.open(
                    new File(mPath, featureId + File.separator + attachId), nMode);
        default:
            throw new FileNotFoundException();
    }
}

方法所在类

android.os.ParcelFileDescriptor