Question

我正在尝试为我的应用创建一个黑名单，因此用户通过editText输入的blacklist.txt文件中存在的任何单词都将被标记出来。我下面的代码没有做任何事情，我不知道为什么。

private  String comparevalue()  {
    BufferedReader buffered = null;

        String val = editbox.getText().toString();
        InputStream inputStream =getResources().openRawResource(R.raw.blacklist);
        buffered = new BufferedReader(new InputStreamReader(inputStream));

    try {
        String line = buffered.readLine();
        while (line != null) {

            line = buffered.readLine();

        }if (val.equalsIgnoreCase(line)) {
            Toast.makeText(this, "Working", Toast.LENGTH_LONG).show();
        }
    } catch (IOException e) {
        e.printStackTrace();
        Toast.makeText(this,"Not found",Toast.LENGTH_LONG).show();
    **}
    return buffered.toString();
}**

Answer 1

你把if放在了外面。所以你只是将val与null进行比较。

把它放在里面，在buffered.readLine()之前，所以你不要忽略第一行。像这样：

line = buffered.readLine();
while (line != null) 
{
    if (val.equalsIgnoreCase(line)) 
    {
        Toast.makeText(this, "Working", Toast.LENGTH_LONG).show();
    }

    line = buffered.readLine();        
}

Answer 2

像这样更改您的代码

while (line != null) {

        line = buffered.readLine();
        if (val.equalsIgnoreCase(line)) {
            Toast.makeText(this, "Working", Toast.LENGTH_LONG).show();
        }
    }

比较.txt文件和editText之间的值

2 个答案: