AndroidStudio getText返回空

Question

以下代码中的getText()方法返回null

private TextView version;
protected void onCreate(Bundle savedInstanceState) {
    version = findViewById(R.id.vers);
    String versions = version.getText().toString(); //getText empty (Help)
    if(versions =="1.4") {
        splashThread.start();`  
    }
}

private void jsonParse() {
    version.append("1.4");`
}