Question

我正在尝试读取文本文件但在openRawResource中获取异常，我的文本文件位于drawable文件夹中，这是我的代码。

public void PlayWithRawFiles() throws IOException {      
    String str="";
    StringBuffer buf = new StringBuffer();          
    InputStream is = getApplicationContext().getResources().openRawResource(R.drawable.dict_7letter);
    BufferedReader reader = new BufferedReader(new InputStreamReader(is));
    if (is!=null) {                         
        while ((str = reader.readLine()) != null) { 
            buf.append(str + "\n" );
        }               
    }       
    is.close(); 
    Log.d("from dict", "........."+buf);                


}

Answer 1

将您的文本文件放在资源中并编写以下代码以读取文本文件：

    public String ReadFromfile(String fileName, Context context) {
        StringBuilder returnString = new StringBuilder();
        InputStream fIn = null;
        InputStreamReader isr = null;
        BufferedReader input = null;
        try {
            fIn = context.getResources().getAssets()
                    .open(fileName, Context.MODE_WORLD_READABLE);
            isr = new InputStreamReader(fIn);
            input = new BufferedReader(isr);
            String line = "";
            while ((line = input.readLine()) != null) {
                returnString.append(line);
            }
        } catch (Exception e) {
            e.getMessage();
        } finally {
            try {
                if (isr != null)
                    isr.close();
                if (fIn != null)
                    fIn.close();
                if (input != null)
                    input.close();
            } catch (Exception e2) {
                e2.getMessage();
            }
        }
        return returnString.toString();
}

Answer 2

您可以将文本文件放在资源下的原始文件夹中。然后以

的形式访问它

getResources().openRawResource(R.raw.dict_7letter);

如果您需要将其保存在可绘制文件夹中，请使用

访问它

getResources().getIdentifier("drawable/dict_7letter","drawable", getPackageName())

InputStream ins = getResources().openRawResource(getResources().getIdentifier("drawable/dict_7letter","drawable", getPackageName()));

为什么我会得到Nullpointer异常？

2 个答案: