Android 如何保持横竖屏切换不变以及Fragment调用setRetainInstance的原理_fragment设置竖屏后设置不回横屏

限定屏幕方向:
设置Manifest文件的activity的属性:
android:screenOrientation="portrait"(始终竖屏)
landscape(始终横屏)

///

自己处理变更:
设置Manifest文件中的activity属性:
android:configChanges="orientation|screenSize|keyboardHidden"


视图状态会自动保存(适用于EditText不适用于TextView):
前提条件:
(1)拥有Id
(2)实现onSaveInstanceState回调
(3)实现onRestoreInstanceState回调
 

    protected void onSaveInstanceState(Bundle outState) {
        super.onSaveInstanceState(outState);
        Log.d(TAG, "onSaveInstanceState() called with: " + "outState = [" + outState + "]");
        outState.putLong(CREATE_TIME, this.createTime);
        Log.d(TAG, "onSaveInstanceState() called with: " + "outState = [" + outState + "]");
    }
 
    @Override
    protec