如何在 Android 中读取文本文件? [英] How can I read a text file in Android?

问题描述

我想从文本文件中读取文本.在下面的代码中，发生了异常(这意味着它进入了 catch 块).我将文本文件放在应用程序文件夹中.我应该把这个文本文件 (mani.txt) 放在哪里才能正确阅读?

I want to read the text from a text file. In the code below, an exception occurs (that means it goes to the catch block). I put the text file in the application folder. Where should I put this text file (mani.txt) in order to read it correctly?

    try
    {
        InputStream instream = openFileInput("E:\test\src\com\test\mani.txt"); 
        if (instream != null)
        {
            InputStreamReader inputreader = new InputStreamReader(instream); 
            BufferedReader buffreader = new BufferedReader(inputreader); 
            String line,line1 = "";
            try
            {
                while ((line = buffreader.readLine()) != null)
                    line1+=line;
            }catch (Exception e) 
            {
                e.printStackTrace();
            }
         }
    }
    catch (Exception e) 
    {
        String error="";
        error=e.getMessage();
    }

推荐答案

试试这个:

我假设你的文本文件在 SD 卡上

I assume your text file is on sd card

    //Find the directory for the SD Card using the API
//*Don't* hardcode "/sdcard"
File sdcard = Environment.getExternalStorageDirectory();

//Get the text file
File file = new File(sdcard,"file.txt");

//Read text from file
StringBuilder text = new StringBuilder();

try {
    BufferedReader br = new BufferedReader(new FileReader(file));
    String line;

    while ((line = br.readLine()) != null) {
        text.append(line);
        text.append('
');
    }
    br.close();
}
catch (IOException e) {
    //You'll need to add proper error handling here
}

//Find the view by its id
TextView tv = (TextView)findViewById(R.id.text_view);

//Set the text
tv.setText(text.toString());

以下链接也可以帮助您:

following links can also help you :

我该怎么做从 Android 中的 SD 卡读取文本文件?

如何在 Android 中读取文本文件?

Android 读取文本原始资源文件

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