试图逐行将文本文件加载到数组中,但数组保持为空,我做错了什么?(Java,android工作室)

private String[] words;

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mDecorView = getWindow().getDecorView();

    loadWords();

    TextView tv = (TextView) findViewById(R.id.word);
    tv.setText(words[0]);
}

 public void loadWords()
{

    try {
        InputStream file = new FileInputStream("words.txt");
        InputStreamReader sr = new InputStreamReader(file);
        BufferedReader br = new BufferedReader(sr);

        int n = 0;
        while(br.readLine() != null)
        {
            words[n] = br.readLine();
            n++;
        }

    } catch (IOException e) {
        e.printStackTrace();
    }
}

好的,所以我只是试图打印出数组中的第一个元素,但应用程序在启动过程中崩溃,并给出错误“尝试从空数组读取”

EDIT-解决方案
-我没有初始化数组。(我知道我有100行)
-我的输入流不正确(找不到我的文件)
-我试图从一个单独的布局(当时未选中)更新TextView

String[] words = new String[100];

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    mDecorView = getWindow().getDecorView();
    loadWords();
}

public void changeView(View view) {

    setContentView(R.layout.game_view);
    TextView tv = (TextView) findViewById(R.id.word);
    tv.setText(words[0]);
}

public void loadWords()
{
    try {
        BufferedReader br = new BufferedReader(new InputStreamReader(getAssets().open("words.txt")));
        for(int i = 0;i<words.length;i++)
        {
            words[i] = br.readLine();
        }
        br.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}