如何在Android中阅读文本文件？

  • Z时代
  • 2024-01-10
  • 分类：问答

我想从文本文件中读取文本。在下面的代码中，发生异常（这意味着它进入了该catch块）。我将文本文件放在应用程序文件夹中。我应该在哪里放置此文本文件（mani.txt）以便正确阅读？

    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();
    }

回答：

我假设你的文本文件在SD卡上

//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('\n');
}
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());

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