android - 在双布局 Activity 中在屏幕上旋转保存实例

Question

我的 Activity 有一个 ImageView。它从拍照 Action 中获取图像。此 Activity 有两种布局。

在 list 中，有:

我的问题是，如果我删除

configChanges="orientation|keyboardHidden|screenSize"

数据不会保存，但如果不保存，则不会加载 form_layout.xml (land)。 screenRotate 上加载的是默认横向布局。

如何解决我的问题，即在使用保存的数据旋转后加载新的 xml 布局？

更新

我不想留下

configChanges="orientation|keyboardHidden|screenSize"

Answer 1

如果要保持configChanges="orientation|keyboardHidden|screenSize"需要再次手动调用setContentView

@Override
public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    //Get last state
    String text = et1.getText().toString();

    //Create new view according to layout
    setContentView(R.layout.activity_login);

    // Restore last state
    et1 = (EditText) findViewById(R.id.et1);
    et1.setText(text);
}

否则最好的办法是将数据保存到 Bundle onSaveInstanceState 并在 onCreate 中恢复它

请参阅此处 http://developer.android.com/training/basics/activity-lifecycle/recreating.html

static final String STATE_SCORE = "playerScore";
static final String STATE_LEVEL = "playerLevel";
...

    @Override
    public void onSaveInstanceState(Bundle savedInstanceState) {
        // Save the user's current game state
        savedInstanceState.putInt(STATE_SCORE, mCurrentScore);
        savedInstanceState.putInt(STATE_LEVEL, mCurrentLevel);

        // Always call the superclass so it can save the view hierarchy state
        super.onSaveInstanceState(savedInstanceState);
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState); // Always call the superclass first

        // Check whether we're recreating a previously destroyed instance
        if (savedInstanceState != null) {
            // Restore value of members from saved state
            mCurrentScore = savedInstanceState.getInt(STATE_SCORE);
            mCurrentLevel = savedInstanceState.getInt(STATE_LEVEL);
        } else {
            // Probably initialize members with default values for a new instance
        }
        ...
    }