如何动态获取屏幕方向

我们知道 android在屏幕旋转以后，有些情况会销毁当前的Activity. 也就是说从新启动个Activity. 然后 跑onCreate()  onStart()等流程．

还有中情况是　屏幕旋转后，不从新启动这个Activity. 只做些动作．

第一中情况是正常情况的流程．　第二中情况是你在manifest.xml里注册了android:config后的动作，你告诉了喜欢，当哪写配置改变后会做什么．

那如何动态检测当前屏幕方向及大小呢？


public class orientation extends Activity {
    TextView textview=null;
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        textview=(TextView)findViewById(R.id.textview);
        int screenwidth=getWindowManager().getDefaultDisplay().getWidth();
             int screenheight=getWindochanger codewManager().getDefaultDisplay().getHeight();
             Log.d("orient", "now the screen width is :"+screenwidth+"screen height is:"+screenheight);

        int orient=getRequestedOrientation();
        if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE)
        {
            Log.d("orient", "now the screen orient is landscape");
        }
        else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT)
        {
        Log.d("orient", "now the screen orient is portrait");
        }
    }
}

哎，这样就很明显了，问题的根源是配置改变，那就找配置信息．getResources().getConfiguration即可获得当前配置对象．

这样读就可以了．

当然getWindowManager().getDefaultDisplay().getHeight() getWidth()就获得了高度，宽度．获得值会随屏幕方向改变而改变．