将TextView声明为final

Question

对不起，noob android dev在这里，我试图理解为什么eclipse希望我的TextView被声明为final。

    TheStack theStack = new TheStack(10);
    protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    TextView display = (TextView) findViewById(R.id.tv1);
    Button b0 = (Button) findViewById(R.id.b0);

    b0.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View v) {
            // TODO Auto-generated method stub
            theStack.push("0");
            display.setText(theStack.getStack());
        }
    });

}

Answer 1

简短回答：因为你在内部类中使用display。

答案很长：Why are only final variables accessible in anonymous class?