Android 读写文件的N种写法

Android 读写文件的N种写法（待续。。。）

 

读取raw文件

// 读取raw文件
    private void rawRead(){
        String ret = "";

        try {
            InputStream is = getResources().openRawResource(R.raw.my_raw);

            int len = is.available();
            byte []buffer = new byte[len];

            is.read(buffer);
            ret = EncodingUtils.getString(buffer, "utf-8");

            is.close();
        } catch (Exception e) {
            e.printStackTrace();
        }

        tvTXT.setText(ret);
    }

 

读取assets文件

// 读取assets文件
private void assetsRead(){
    String fileName = "my_assets.txt";              // assets下文件
//  String fileName = "test/my_assets_test.txt";    // assets下子目录文件
    String ret = "";

    try {
        InputStream is = getResources().getAssets().open(fileName);
        int len = is.available();
        byte []buffer = new byte[len];

        is.read(buffer);
        ret = EncodingUtils.getString(buffer, "utf-8");

        is.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

    tvTXT.setText(ret);
}

读取sdcard文件

// 读取sdcard文件
private void sdcardRead(){
    String fileName = "/sdcard/my_sdcard.txt";              // assets下文件
//  String fileName = "/sdcard/test/my_sdcard_test.txt";    // sdcard下子目录文件
    String ret = "";

    try {
        FileInputStream fis = new FileInputStream(fileName);

        int len = fis.available();
        byte []buffer = new byte[len];

        fis.read(buffer);
        ret = EncodingUtils.getString(buffer, "UTF-8");

        fis.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

    tvTXT.setText(ret);
}

 

 

 

运行效果：