页: 1
The way I do it is to use the fact that the Stack class implements the Serializable interface and pass the object via an Intent object.
奇怪的是,当我使用getSerializableExtra(......)时,则物体类别从Stack改为ArrayList。
I did not find anything about that on the internet. Do you have any idea of the reason it behaves like that ?
Thanks
这里是一部简单的法典,它照搬了这些东西(I在2.3.3和4.0.3英寸上尝试):
A级:
package my.test;
import java.util.Stack;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
public class A extends Activity {
Stack<Integer> stack;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
stack = new Stack<Integer>();
stack.push(42);
stack.push(7);
Log.i("Class of stack in A (1)",stack.getClass().getName());
Intent i = new Intent(this,B.class);
i.putExtra("stack", stack);
Log.i("Class of stack in A (2)",i.getSerializableExtra("stack").getClass().getName());
startActivity(i);
}
}
B级:
package my.test;
import java.io.Serializable;
import java.util.Stack;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
public class B extends Activity {
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
Intent i = getIntent();
Serializable s = i.getSerializableExtra("stack");
Log.i("class of stack in B",s.getClass().getName());
Stack<Integer> stack = (Stack<Integer>) s;
}
}
<代码>记录仪表(......):
04-20 15:36:56.596: I/Class of stack in A (1)(748): java.util.Stack
04-20 15:36:56.596: I/Class of stack in A (2)(748): java.util.Stack
04-20 15:36:56.736: I/class of stack in B(748): java.util.ArrayList