Android Studio中新建assets文件的方法、读取内

文章内容参考：
https://blog.csdn.net/chuyouyinghe/article/details/79891934
https://www.cnblogs.com/andlife/archive/2011/06/25/2090109.html

1、创建assets文件的方法

image.png
image.png

2、读取内容

  /**
     * 读取assets目录下的文件,并返回字符串
     */
    public static String getAssetsFile(String name) {
        InputStream is = null;
        BufferedInputStream bis = null;
        InputStreamReader isr = null;
        BufferedReader br = null;
        StringBuilder stringBuilder = null;
        final AssetManager assetManager = ZLC.getApplicationContext().getAssets();
        try {
            is = assetManager.open(name);
            bis = new BufferedInputStream(is);
            isr = new InputStreamReader(bis);
            br = new BufferedReader(isr);
            stringBuilder = new StringBuilder();
            String str;
            while ((str = br.readLine()) != null) {
                stringBuilder.append(str);
            }
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (br != null) {
                    br.close();
                }
                if (isr != null) {
                    isr.close();
                }
                if (bis != null) {
                    bis.close();
                }
                if (is != null) {
                    is.close();
                }
//                assetManager.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (stringBuilder != null) {
            return stringBuilder.toString();
        } else {
            return null;
        }
    }

3、一个异常的发生

上面读取内容的方法中，有一个关闭assetManager的方法：

assetManager.close();

当我在工具类中直接关闭，可能会出现如下异常：

Caused by: android.content.res.Resources$NotFoundException::File res/anim/no_anim.xml from xml type anim resource ID #0x7f050014

Exception : Caused by: java.lang.NullPointerException: asset]