android中加载assets中的资源文件

1.直接读取inputstream流

 

AssetManager assetManager = getAssets();//獲取其輸入流 然後直接讀取這個流
InputStream inputStream = assetManager.open("1.txt");

 

 

2.複製asset指定文件到制定地方

 

/**
     * Copy assets util
     * @param path The dictionary path
     * @param filename  The filename
     * @param context  Your context
     */
    public void copyAssets(String path, String filename,Context context) {
        try {

            File fpath = new File(PATH);
            if (!fpath.isDirectory()) {
                fpath.mkdirs();
            }
            AssetManager assetManager = context.getAssets();
            InputStream inputStream = assetManager.open(filename);
            FileOutputStream fileOutputStream = new FileOutputStream(PATH
                    + filename);
            byte[] buffer = new byte[1024];
            int read;
            while ((read = inputStream.read(buffer)) != -1) {
                fileOutputStream.write(buffer, 0, read);
            }
            inputStream.close();
            inputStream = null;
            fileOutputStream.flush();
            fileOutputStream.close();
            fileOutputStream = null;

        } catch (Exception e) {
            // TODO: handle exception
        }
    }

3.複製assets下所有文件到指定地方

 

 

private static void copyAssets(Context context) {//copy Assets的方法

            AssetManager assetManager = context.getAssets();
            String[] files = null;
            try {
                files = assetManager.list("");
            } catch (IOException e) {

            }
            for (int i = 0; i < files.length; i++) {
                InputStream in = null;
                OutputStream out = null;
                try {
                    if (!(new File(Tips.DATA_PATH + files[i])).exists()) {
                        in = assetManager.open(files[i]);
                        out = new FileOutputStream(Tips.DATA_PATH + files[i]);
                        Tips.copyFile(in, out);
                        in.close();
                        in = null;
                        out.flush();
                        out.close();
                        out = null;
                    }
                } catch (Exception e) {
                }
            }
        }

        public static void copyFile(InputStream in, OutputStream out)
                throws IOException {
            byte[] buffer = new byte[1024];//做了个缓冲流
            int read;
            while ((read = in.read(buffer)) != -1) {
                out.write(buffer, 0, read);
            }
        }