Android API 级别 < 19 和 "try can use automatic resource management" 警告

Question

我有这段代码

private void copyFile(File src, File dst) throws IOException {

    FileChannel inChannel = new FileInputStream(src).getChannel();
    FileChannel outChannel = new FileOutputStream(dst).getChannel();

    try {

        inChannel.transferTo(0, inChannel.size(), outChannel);

    }finally {

        if(inChannel != null) {

            inChannel.close();

        }

        outChannel.close();

    }

}

生成烦人的警告 "try can use automatic resource management"。问题是我无法使用 Java 7 try-with-resources 导致我的应用程序目标 api 级别 14（如果我使用它会出错）。有没有办法抑制那个烦人的警告？

Answer 1

@SuppressWarnings("TryFinallyCanBeTryWithResources") 成功了:)

Answer 2

@SuppressLint("NewApi") 也行 =)

例如：

 @SuppressLint("NewApi")
    public static File saveImage(Bitmap bitmap) {
        File file = null;
        if (isExternalStorageWritable()) {
            file = new File(getFolderStorageDirectory(), getFileNameImage());
            try (FileOutputStream out = new FileOutputStream(file)) {
                bitmap.compress(Bitmap.CompressFormat.JPEG, 90, out);
            } catch (Exception e) {
                e.getMessage();
            }
        }
        return file;
    }

希望对您有所帮助！

Android API 级别 < 19 和 "try can use automatic resource management" 警告

Android API level < 19 and "try can use automatic resource management" warning

android

try-catch

suppress-warnings