Question

我正在尝试在Android工作室中读取文件并将每个字符串放入arraylist但是当我尝试从arraylist中获取字符串时，应用程序崩溃（消息：＆＃34;不幸的是，App已停止＆＃34;）谁能告诉我什么是错的？

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);


////////////////////////////////////////////////////////////////////////////
    String text = "";

    tv_view = (TextView) findViewById(R.id.textview1);

    Scanner s = new Scanner(System.in);

    File n = new File("C:\\Users\\Admin\\AndroidStudioProjects\\LOTOS.1\\app\\src\\main\\assets\\nouns.txt");

    //Instantiate Scanner s with f variable within parameters
    //surround with try and catch to see whether the file was read or not
    try {
        s = new Scanner(n);
    } catch (FileNotFoundException e) {

        e.printStackTrace();
    }

    //Instantiate a new ArrayList of String type
    ArrayList<String> theWord = new ArrayList<String>();


    //while it has next ..
    while(s.hasNext()){
        //Initialise str with word read
        String str=s.next();

        //add to ArrayList
        theWord.add(str);

    }

    text = theWord.get(150);

    tv_view.setText(text);
    //return ArrayList


}

Answer 1

问题是您无法直接从Android系统中的Windows系统读取文件。 Android设备和Windows是完全不同的系统。即使您已将文件放在assets文件夹中，也无法读取它，因为路径引用了Windows结构。

您的Android设备或模拟器无法读取此路径：C:\\Users\\Admin...

要从Android Studio中的assests访问文件，您应该使用getAssets().open(...)方法。

以下是您可以阅读文件的示例。

BufferedReader reader = null;
reader = new BufferedReader(
        new InputStreamReader(getAssets().open("nouns.txt"), "UTF-8")); 

// do reading, usually loop until end of file reading 
String mLine;
while ((mLine = reader.readLine()) != null) {
       //process 
       ...
}

arraylist.get（）在Android Studio中崩溃我的应用程序

1 个答案: