android 4.0 垂直滚动条问题

[yuzhonghao868]

1.XML代码如下
<?xml version="1.0" encoding="utf-8"?>
<ScrollView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
<LinearLayout android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent">
<TextView
android:id="@+id/textView"
android:layout_width="fill_parent"
android:layout_height="wrap_content"

/>
</LinearLayout>

</ScrollView>
2.public class MainActivity extends Activity {

private TextView textView ;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.scrollview);

textView = (TextView)findViewById(R.id.textView);
textView.setText("A\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA\nA");
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}

}
3.模拟器中的显示

注：模拟器刚起来时，看到滚动条了，但是不能实现滚动效果

[开发者_android]

height --> wrap_content

[Leon_He2014]

我在手机上试了一下，是可以正常跑的。

[ascleft]

<LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="fill_parent"> 这段改成 <LinearLayout android:orientation="vertical" android:layout_width="fill_parent" android:layout_height="wrap_content"> 请叫我红领巾

[yuzhonghao868]

请高手帮忙看看是什么问题