Android上下滑动,scollView和Listview结合使用,listview的优化.....

 1     private ScrollView scrollView;
 2     private ListView listview;
 3 
 4     @Override
 5     protected void onCreate(Bundle savedInstanceState) {
 6         super.onCreate(savedInstanceState);
 7         this.setContentView(R.layout.activity_show);
 8         scrollView = (ScrollView) findViewById(R.id.scrollView1);
 9         listview = (ListView) findViewById(R.id.listView1);
10         listview.setAdapter(new ArrayAdapter<String>(activity_show.this,
11                 android.R.layout.simple_list_item_1, getData())); // 使用系统adapter 填充
12         ListAdapter adapter = listview.getAdapter(); // 通过反射获取
13         int count = adapter.getCount(); // 得到长度
14         int totalHeight = 0; //总的高度
15         int height=0;   //分割线的高度
16          for (int i = 0; i < count; i++) {
17             View view = adapter.getView(i, null, listview); // 通过反射获取
18             view.measure(View.MeasureSpec.UNSPECIFIED,View.MeasureSpec.UNSPECIFIED);  //设置样式
19             totalHeight += view.getMeasuredHeight();    //叠加高度        
20         }
21         height=listview.getDividerHeight()*(count-1);  //获取分割符的高度
22         totalHeight+=height;   //总高度
23         //社会到listview view中
24         ViewGroup.LayoutParams params=listview.getLayoutParams();
25         //设置高度
26         params.height=totalHeight;
27         listview.setLayoutParams(params);  //添加listview
28     }