设置方向..纵向和横向模式的不同设计..不重置输入的值

我有不同的纵向模式布局设计和景观模式的不同外观布局..在'res'文件夹中，我创建了一个名为'land-layout'的新文件夹，在那里我创建了与'layout'内部同名的文件 .

我有textview（计数器），当方向改变时恢复值 . 但我面临的问题是，当方向从纵向到横向时，设计仍然与纵向模式下的设计相同..我想知道，我该如何处理？我将不胜感激 . 谢谢 .

MainActivity.java：

public class MainActivity extends Activity {

private int sum = 0;
Button add, sub;
TextView tv1;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    tv1 = (TextView) findViewById(R.id.textView1);

    add = (Button) findViewById(R.id.button1);
    add.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            sum++;
            tv1.setText("Incrementation = " + sum);
        }
    });
    sub = (Button) findViewById(R.id.button2);
    sub.setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View arg0) {
            // TODO Auto-generated method stub
            sum--;
            tv1.setText("Decrementation = " + sum);
        }
    });
}  
@Override
public void onConfigurationChanged(Configuration newConfig) {
// TODO Auto-generated method stub
super.onConfigurationChanged(newConfig);

if (newConfig.orientation == Configuration.ORIENTATION_LANDSCAPE) {
// setContentView(R.layout.activity_main);
Log.v("message", "ORIENTATION_LANDSCAPE");

} else if (newConfig.orientation == Configuration.ORIENTATION_PORTRAIT) {
Log.v("message", "ORIENTATION_PORTRAIT");
}

}


@Override
protected void onSaveInstanceState(Bundle outState) {
    // TODO Auto-generated method stub
    super.onSaveInstanceState(outState);
    outState.putInt("sum", sum);
}

@Override
protected void onRestoreInstanceState(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onRestoreInstanceState(savedInstanceState);
    int x = savedInstanceState.getInt("sum");
}

}

res \ layout-land \ activity_main.xml（用于横向模式）

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:background="@drawable/backg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="total is = 0"
    android:layout_gravity="center"
    android:textSize="40sp"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="horizontal"
>

<Button
    android:id="@+id/button1"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:layout_weight="1"
    android:text="ADD" />

<Button
    android:id="@+id/button2"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_weight="1"
    android:layout_gravity="center"
    android:text="Sub" />
</LinearLayout>

<TextView
    android:id="@+id/textView2"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Large Text"
    android:textAppearance="?android:attr/textAppearanceLarge" />

</LinearLayout>

res \ layout \ activity_main.xml（用于纵向模式）：

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:background="@drawable/backg"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity" >

<TextView
    android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:freezesText="true"
    android:text="total is = 0"
    android:textSize="40sp"
    android:textAppearance="?android:attr/textAppearanceLarge" />

<Button
    android:id="@+id/button1"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text="ADD" />

<Button
    android:id="@+id/button2"
    android:layout_width="200dp"
    android:layout_height="wrap_content"
    android:layout_gravity="center"
    android:text="Sub" />

</LinearLayout>

在清单中我添加：android：configChanges =“orientation | screenSize”（我如何使用onConfigurationChanged（）来处理布局？）

<activity
        android:name="com.example.apptest.MainActivity"
        android:configChanges="orientation|screenSize"
        android:label="@string/app_name" >
        <intent-filter>
            <action android:name="com.example.apptest.MAINACTIVITY" />

            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>
    </activity>