Android读取Assert文件夹下txt文本并变为String的方法

public static String readAssertResource(Context context, String strAssertFileName) {
        AssetManager assetManager = context.getAssets();
        String strResponse = "";
        try {
            InputStream ims = assetManager.open(strAssertFileName);
            strResponse = getStringFromInputStream(ims);
        } catch (IOException e) {
            e.printStackTrace();
        }
        return strResponse;
    }

    private static String getStringFromInputStream(InputStream a_is) {
        BufferedReader br = null;
        StringBuilder sb = new StringBuilder();
        String line;
        try {
            br = new BufferedReader(new InputStreamReader(a_is));
            while ((line = br.readLine()) != null) {
                sb.append(line);
            }
        } catch (IOException e) {
        } finally {
            if (br != null) {
                try {
                    br.close();
                } catch (IOException e) {
                }
            }
        }
        return sb.toString();
    }
}