How to read . txt file?

Question

How do I read a file .txt which is written in lines and check if in a row that file has a value if you have made a check on checkbox.

Example:

txt files:

123
234
2456

If you have the file 123, checks the checkbox 123, I don’t need that file txt be visible to the user only need the code to read it.

Answer 1

To read a . txt from android, you can use the following code:

try {
    AssetManager assetManager = getResources().getAssets();
    InputStream inputStream = assetManager.open("nome-do-arquivo.txt");
    InputStreamReader inputStreamReader = new InputStreamReader(inputStream);
    BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
    String linha;
    LinkedList<String> linhas = new LinkedList<String>();
    while((linha = bufferedReader.readLine())!=null){
        //aqui com o valor da linha vc pode testar o que quiser, por exemplo: linha.equals("123")
        linhas.add(linha);
    }
    inputStream.close();
} catch (IOException e) {
    e.printStackTrace();
}