Android保存String到文件和從文件中讀取String

保存inputText到默認文件“data/data/com.example.項目名/files/data”中（路徑是默認的）

private void save(String inputText){
        FileOutputStream out = null;
        BufferedWriter writer = null;
        try{
            out = openFileOutput("data", Context.MODE_PRIVATE);
            writer = new BufferedWriter(new OutputStreamWriter(out));
            writer.write(inputText);
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            try{
                if (writer !=null){
                    writer.close();
                }
            }catch (IOException e){
                e.printStackTrace();
            }
        }
    }

從“data/data/com.example.項目名/files/data”中讀取String

private String load(){
        FileInputStream in = null;
        BufferedReader reader = null;
        StringBuilder content = new StringBuilder();
        try{
            in = openFileInput("data");//文件名
            reader = new BufferedReader(new InputStreamReader(in));
            String line = "";
            while ((line = reader.readLine()) != null){
                content.append(line);
            }
        }catch (IOException e){
            e.printStackTrace();
        }finally {
            if (reader !=null){
                try{
                    reader.close();
                }catch (IOException e){
                    e.printStackTrace();
                }
            }
        }
        return content.toString();
    }