保存Activity的状态（切换横竖屏时）

public class MainActivity extends Activity {

@Overrideprotected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);//获取保存的数据    if(savedInstanceState!=null){        Toast.makeText(this, savedInstanceState.getString("ss"), 1).show();    }}private String ss = "保存的信息。。。";@Overrideprotected void onSaveInstanceState(Bundle outState) {    outState.putString("ss", ss);//保存Activity里的数据    super.onSaveInstanceState(outState);    Toast.makeText(this, "onSaveInstanceState", 1).show();

// if(outState != null){
// Toast.makeText(this, “onSaveInstanceState”, 1).show();
//
// }
}