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在装置定向和机器人上缺少动态添加的图像吗?
原标题:Dynamically added images are missing on device orientation in android?

下面的代码是动态创建图像视图, 并在单击按钮时添加到其父版版式 。 这效果很好 。 当我改变设备方向时, 一切都会消失 。 也就是说, 如果我改变设备方向, 添加图像后, 添加图像时会丢失添加的图像 。 为什么? 在更改设备方向后, 我怎样才能恢复自己的图像?

 @Override
public void onClick(View v) {
    //create an imageview
    ImageView img = new ImageView(getApplicationContext());

    //set layout parameters
    img.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT)); 

    //set image source
    img.setImageResource(R.drawable.back);

    //add imageview to parent layout
    parentView.addView(img);        

}
最佳回答

如果您不想影响布局, 请将此标记添加到 xml 文件 。

android:configChanges="orientation|keyboardHidden"

这将帮助改变您的布局, 但不会影响任何其他事情 。

  <activity
        android:label="@string/app_name"
        android:name=".YourActivity" android:configChanges="orientation|keyboardHidden"/>
问题回答

你可以用这种方式把它焊起来

1 - 在SaveInstance State () 回调

ex: Saving Android Activity state using Save Instance State http://android-er.blogspot.in/2011/09/onsaveinstancestate-and.html

2.- 使用“获得“获得”“获得”“获得“获得”“获得”“获得”“保持“不结构”Instance ()

ex: < a href=" "https://stackoverflow.com/ questions 5994801/and groid- getlastnon configisation Instance" ()

3 - android:configChanges in menifest and orverirding onConfigChange in acivity ex:http://developer.android.com/resources/articles/faster-screen-orientation-change.html Activity restart on rotation Android

http://developer.android.com/guide/topics/resources/runtime-changes.html

根据您的需求选择一种方式...





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