如何在onSaveInstanceState中使用变量[重复]

我刚刚开始在 android 上学习编程，并且在使用变量时遇到问题onSaveInstanceState。这是我的代码：

int resultCode;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    if (savedInstanceState != null) {
        super.onRestoreInstanceState(savedInstanceState);

        int resultCode = savedInstanceState.getInt("resultCode");
    } 

    Button btnOpenWithResult = (Button) findViewById(R.id.btnOpenWithResult);
    btnOpenWithResult.setOnClickListener(new OnClickListener() {

        @Override
        public void onClick(View arg0) {
            Intent myIntent = new Intent(flashlight.this, ThirdActivity.class);
            startActivityForResult(myIntent, 1);
        }
    });
}

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
    super.onActivityResult(requestCode, resultCode, data);

    switch (resultCode) {
    case 1:   
         /** option 1  */            
        break;
    case 2:
         /** option 2 */
        break;
}

@Override
public void onSaveInstanceState(Bundle savedInstanceState) {
    savedInstanceState.putInt("resultCode", resultCode);
    super.onSaveInstanceState(savedInstanceState);
}

我想保存变量resultCode using onSaveInstanceState并在恢复活动后再次使用它......

（抱歉我的英语水平）

Cyren... 1）我认为没有理由在 onCreate 中调用 super.onRestoreInstanceState 。在方法中进行该调用是有意义的

public void onRestoreInstanceState(Bundle saved) {
    super.onRestoreInstanceState(saved);

2）声明：

   int resultCode = savedInstanceState.getInt("resultCode");

是“隐藏”变量：

int resultCode;

较早宣布。因此变量 resultCode 有两个版本，作用域不同。也许你的意思是编码：

int resultCode;

stuff here

    resultCode = savedInstanceState.getInt("resultCode");

希望有帮助， 日航