静态变量不能保存在onSaveInstanceState中吗？

Question

考虑到下面的代码，它保存静态变量: mMyArray在onSaveInstanceState中，并在onRestoreInstanceState中恢复它，但是我发现它根本无法保存int数组。我尝试了primative类型值(int)，它可以保存/恢复优先级类型值。

public class StaticVarActivity extends Activity {

    private static final String TAG = "StaticVarActivity";

    private static int[] mMyArray = { 1, 1 };

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        Log.d(TAG, "Setting values to 2 in onCreate");
        mMyArray[0] = 2;
        mMyArray[1] = 2;

        findViewById(R.id.btn).setOnClickListener(new OnClickListener() {

            public void onClick(View v) {
                Log.d(TAG, "Setting values to 3 in onClick");
                mMyArray[0] = 3;
                mMyArray[1] = 3;
            }
        });
    }

    /* (non-Javadoc)
     * @see android.app.Activity#onRestoreInstanceState(android.os.Bundle)
     */
    @Override
    protected void onRestoreInstanceState(Bundle savedInstanceState) {
        super.onRestoreInstanceState(savedInstanceState);

        Log.d(TAG,"onRestoreInstanceState 1:"+mMyArray[0]+","+mMyArray[1]);
        mMyArray = savedInstanceState.getIntArray("key");
        Log.d(TAG,"onRestoreInstanceState 2:"+mMyArray[0]+","+mMyArray[1]);

    }

    /* (non-Javadoc)
     * @see android.app.Activity#onSaveInstanceState(android.os.Bundle)
     */
    @Override
    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Log.d(TAG,"onSaveInstanceState 1:"+mMyArray[0]+","+mMyArray[1]);
        //int[] sss = new int[]{mMyArray[0],mMyArray[1]};
        //outState.putIntArray("key", sss);
        outState.putIntArray("key", mMyArray);
        Log.d(TAG,"onSaveInstanceState 2:"+mMyArray[0]+","+mMyArray[1]);
    }
}

日志：

04-14 15:16:00.633:调试/静态变容活动(7251)：在onCreate中将值设置为2-14 15:16:19.843:调试/静态变容活动(7251)：在onClick中将值设置为3

//进行配置更改，例如更改方向

04-14 15:16:23.893:调试/静态变容活动(7251)：onSaveInstanceState 1:3，04-14 15:16:23.893:调试/静态变容活动(7251)：onSaveInstanceState 2:3，04-1415:16:24.073:调试/静态变容活动(7251)：在onCreate 04-14 15:16:24.073:调试/静态变容(7251)：onRestoreInstanceState 1:2，04-14 15:16:24.073:调试/静态变容(7251)：onRestoreInstanceState 2:2,2，2

如果我改为：

private int[] mMyArray = { 1, 1 };

日志将是：

04-14 15:18:29.183:调试/静态变容活动(7355)：在onCreate中将值设置为2-14 15:18:32.123:调试/静态变容活动(7355)：在onClick中将值设置为3

//进行配置更改，例如更改方向

04-14 15:18:33.353:调试/静态变容活动(7355)：onSaveInstanceState 1:3，04-14 15:18:33.353:调试/静态变容活动(7355)：onSaveInstanceState 2:3，04-14 15:18:33.373:调试/静态变容活动(7355)：在onCreate 04-14 15:18:33.393:调试/静态变容活动(7355)：onRestoreInstanceState 1:2，04-14 15:18:33.393:调试/静态变容(7355)：onRestoreInstanceState 2:3,3

我知道它不需要保存静态变量，但是为什么会这样呢？

Answer 1

AFAIK，您不能用另一个static int[]替换int[]。可以用其他static int[]值替换int的成员。