状态保存

//XML

 <TextView
            android:id="@+id/textbaocun"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="uuuu"
                android:textSize="20sp" />
         <EditText 
             android:id="@+id/baocun"
             android:layout_width="match_parent"
             android:layout_height="wrap_content"
             android:layout_gravity="center_horizontal"
             android:singleLine="true"
             android:background="@color/blue_bg"
             android:hint="邮件内容"/>

//Activity

@Override
protected void onSaveInstanceState(Bundle outState) {
// TODO Auto-generated method stub
super.onSaveInstanceState(outState);
String s=textViewb.getText().toString();
outState.putString("statekey",s);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onRestoreInstanceState(savedInstanceState);
if(savedInstanceState !=null){
stateValue = savedInstanceState.getString("stateKey");
t1.setText(stateValue);
}
}