Java CompressFormat.JPEG属性代码示例

public static File getScaledImageFileWithMD5(File imageFile, String mimeType) {
    String filePath = imageFile.getPath();

    if (!isInvalidPictureFile(mimeType)) {
        return null;
    }

    String tempFilePath = getTempFilePath(FileUtil.getExtensionName(filePath));
    File tempImageFile = AttachmentStore.create(tempFilePath);
    if (tempImageFile == null) {
        return null;
    }

    CompressFormat compressFormat = CompressFormat.JPEG;
    // 压缩数值由第三方开发者自行决定
    int maxWidth = 720;
    int quality = 60;

    if (ImageUtil.scaleImage(imageFile, tempImageFile, maxWidth, compressFormat, quality)) {
        return tempImageFile;
    } else {
        return null;
    }
}
 

/**
 * Compress bitmap using jpeg, convert to Base64 encoded string, and return to JavaScript.
 *
 * @param bitmap
 */
public void processPicture(Bitmap bitmap, int encodingType) {
    ByteArrayOutputStream jpeg_data = new ByteArrayOutputStream();
    CompressFormat compressFormat = encodingType == JPEG ?
            CompressFormat.JPEG :
            CompressFormat.PNG;

    try {
        if (bitmap.compress(compressFormat, mQuality, jpeg_data)) {
            byte[] code = jpeg_data.toByteArray();
            byte[] output = Base64.encode(code, Base64.NO_WRAP);
            String js_out = new String(output);
            this.callbackContext.success(js_out);
            js_out = null;
            output = null;
            code = null;
        }
    } catch (Exception e) {
        this.failPicture("Error compressing image.");
    }
    jpeg_data = null;
}
 

private void saveFile(Bitmap bitmap, File file, boolean z) {
    try {
        if (file.exists()) {
            file.delete();
        }
        if (!file.getParentFile().exists()) {
            file.getParentFile().mkdirs();
        }
        file.createNewFile();
        CompressFormat compressFormat = z ? CompressFormat.PNG : CompressFormat.JPEG;
        OutputStream fileOutputStream = new FileOutputStream(file);
        bitmap.compress(compressFormat, 100, fileOutputStream);
        fileOutputStream.flush();
        fileOutputStream.close();
    } catch (Throwable th) {
        if (file.exists()) {
            file.delete();
        }
    }
}
 

public static File getScaledImageFileWithMD5(File imageFile, String mimeType) {
    String filePath = imageFile.getPath();

    if (!isInvalidPictureFile(mimeType)) {
        LogUtil.i("ImageUtil", "is invalid picture file");
        return null;
    }

    String tempFilePath = getTempFilePath(FileUtil.getExtensionName(filePath));
    File tempImageFile = AttachmentStore.create(tempFilePath);
    if (tempImageFile == null) {
        return null;
    }

    CompressFormat compressFormat = CompressFormat.JPEG;
    // 压缩数值由第三方开发者自行决定
    int maxWidth = 720;
    int quality = 60;

    if (ImageUtil.scaleImage(imageFile, tempImageFile, maxWidth, compressFormat, quality)) {
        return tempImageFile;
    } else {
        return null;
    }
}
 

private String outputModifiedBitmap(Bitmap bitmap, Uri uri) throws IOException {
    // Some content: URIs do not map to file paths (e.g. picasa).
    String realPath = FileHelper.getRealPath(uri, this.cordova);

    // Get filename from uri
    String fileName = realPath != null ?
            realPath.substring(realPath.lastIndexOf('/') + 1) :
            "modified." + (this.encodingType == JPEG ? "jpg" : "png");

    String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    //String fileName = "IMG_" + timeStamp + (this.encodingType == JPEG ? ".jpg" : ".png");
    String modifiedPath = getTempDirectoryPath() + "/" + fileName;

    OutputStream os = new FileOutputStream(modifiedPath);
    CompressFormat compressFormat = this.encodingType == JPEG ?
            CompressFormat.JPEG :
            CompressFormat.PNG;

    bitmap.compress(compressFormat, this.mQuality, os);
    os.close();

    if (exifData != null && this.encodingType == JPEG) {
        try {
            if (this.correctOrientation && this.orientationCorrected) {
                exifData.resetOrientation();
            }
            exifData.createOutFile(modifiedPath);
            exifData.writeExifData();
            exifData = null;
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    return modifiedPath;
}
 

/**
 * 根据文件类型获得CompressFormat.
 *
 * @Description:
 * @Date 2014-3-7
 */
private CompressFormat getCompressFormat(String url) {
    String lowerUrl = url.toLowerCase(Locale.ENGLISH);
    if (lowerUrl.endsWith(".jpg")) {
        return CompressFormat.JPEG;
    } else if (lowerUrl.endsWith(".png")) {
        return CompressFormat.PNG;
    }
    return CompressFormat.JPEG;
}
 

public static CompressFormat getBmpFormat(String str) {
    String toLowerCase = str.toLowerCase();
    if (toLowerCase.endsWith("png") || toLowerCase.endsWith("gif")) {
        return CompressFormat.PNG;
    }
    if (toLowerCase.endsWith("jpg") || toLowerCase.endsWith("jpeg") || toLowerCase.endsWith
            ("bmp") || toLowerCase.endsWith("tif")) {
        return CompressFormat.JPEG;
    }
    toLowerCase = getMime(str);
    return (toLowerCase.endsWith("png") || toLowerCase.endsWith("gif")) ? CompressFormat.PNG
            : CompressFormat.JPEG;
}