get Media File Mime Type - Android android.webkit

Android examples for android.webkit:MimeTypeMap

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Description

get Media File Mime Type

Demo Code

import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.InputStream;
import java.net.URL;
import java.net.URLConnection;

import android.graphics.BitmapFactory;
import android.net.Uri;
import android.text.TextUtils;

public class Main {

  public static String getMediaFileMimeType(File mediaFile) {
    String originalFileName = mediaFile.getName().toLowerCase();
    String mimeType = null;//getUrlMimeType(originalFileName);

    if (TextUtils.isEmpty(mimeType)) {
      try {/*w w w.  j  a v a2 s  . c  o m*/
        String filePathForGuessingMime;
        if (mediaFile.getPath().contains("://")) {
          filePathForGuessingMime = Uri.encode(mediaFile.getPath(), ":/");
        } else {
          filePathForGuessingMime = "file://" + Uri.encode(mediaFile.getPath(), "/");
        }
        URL urlForGuessingMime = new URL(filePathForGuessingMime);
        URLConnection uc = urlForGuessingMime.openConnection();
        String guessedContentType = uc.getContentType(); // internally calls guessContentTypeFromName(url.getFile());
                                                         // and guessContentTypeFromStream(is);
        // check if returned "content/unknown"
        if (!TextUtils.isEmpty(guessedContentType) && !guessedContentType.equals("content/unknown")) {
          mimeType = guessedContentType;
        }
      } catch (Exception e) {
      }
    }

    // No mimeType yet? Try to decode the image and get the mimeType from there
    if (TextUtils.isEmpty(mimeType)) {
      try {
        DataInputStream inputStream = new DataInputStream(new FileInputStream(mediaFile));
        String mimeTypeFromStream = getMimeTypeOfInputStream(inputStream);
        if (!TextUtils.isEmpty(mimeTypeFromStream)) {
          mimeType = mimeTypeFromStream;
        }
        inputStream.close();
      } catch (Exception e) {
      }
    }

    if (TextUtils.isEmpty(mimeType)) {
      mimeType = "";
    } else {
      if (mimeType.equalsIgnoreCase("video/mp4v-es")) { // Fixes #533. See: http://tools.ietf.org/html/rfc3016
        mimeType = "video/mp4";
      }
    }

    return mimeType;
  }

  public static String getMimeTypeOfInputStream(InputStream stream) {
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeStream(stream, null, options);
    return options.outMimeType;
  }

}

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