java - 通过 Android Activity 类访问创建变量

Question

我在 OnCreate 方法中从 getIntent() 获取 transaction_amount 变量。

String transaction_amount = getIntent().getStringExtra("transaction_amount");

我想在 OnCreate 方法之外访问此变量。 比如，

public class PayActivity extends ActionBarActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        String transaction_amount = getIntent().getStringExtra("transaction_amount");
    }

    protected void my_function(){
        // I want transaction_amount here.....
    }
}

Answer 1

您可以使用全局变量:

public class PayActivity extends ActionBarActivity {
    String value;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        value = getIntent().getStringExtra("transaction_amount");
    }
    public void yourFunction() {
        // You can acces value here
    }

// your activity here....
}