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懸浮頭部

height col vat ble 總數 private ase demo inf

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1.Activity代碼:

public class Demo extends Activity {

    private LinearLayout invis;
    private LinearLayout invis2;
    private TextView mTVSuspension;
    private PullToRefreshListView mPullToRefreshListView;   //一個可以下拉刷新的listView對象
    private ArrayList<String> list = new ArrayList<String>(); //
數據源 private ListView listView; //普通的listView對象 private View header1; private View header2; @Override protected void onCreate ( Bundle savedInstanceState ) { super.onCreate(savedInstanceState); setContentView(R.layout.demo); invis = (LinearLayout) findViewById(R.id.invis); mPullToRefreshListView
= (PullToRefreshListView) findViewById(R.id.refreshListView); for (int i = 0; i < 50; i++) { list.add("data-----" + i); } listView = mPullToRefreshListView.getRefreshableView(); mPullToRefreshListView.setMode(PullToRefreshBase.Mode.BOTH); header1 = View.inflate(this
, R.layout.header1, null); listView.addHeaderView(header1); header2 = View.inflate(this, R.layout.header2, null); invis2 = (LinearLayout) header2.findViewById(R.id.invis2); mTVSuspension = (TextView) header2.findViewById(R.id.tv_suspension); listView.addHeaderView(header2); //添加頭部,ListView條目中的懸浮部分 listView.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick ( AdapterView<?> parent, View view, int position, long id ) { Toast.makeText(Demo.this, "" + position + "item", Toast.LENGTH_SHORT).show(); } }); //實例化適配器對象 listView.setAdapter(new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, list)); listView.setOnScrollListener(new AbsListView.OnScrollListener() { @Override public void onScrollStateChanged ( AbsListView view, int scrollState ) { } //方法onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) 內參數的介紹: // (1)AbsListView view 所監聽的listView對象 //(2)int firstVisibleItem 能看見的第一個item的位置 //(3)int visibleItemCount 能看見的item的數量 //(4)int totalItemCount 所有item的總數 @Override public void onScroll ( AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount ) { if (firstVisibleItem >= 2) { //第二個條目內容已經不顯示 if (mTVSuspension.getParent() != invis) { invis2.removeView(mTVSuspension); invis.addView(mTVSuspension); } } else { if (mTVSuspension.getParent() != invis2) { invis.removeView(mTVSuspension); invis2.addView(mTVSuspension); } } } }); } }

2.demo布局:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <com.handmark.pulltorefresh.library.PullToRefreshListView
        android:id="@+id/refreshListView"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

    <LinearLayout
        android:id="@+id/invis"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:orientation="vertical">

    </LinearLayout>


</RelativeLayout>

3.header1布局:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent" >

    <TextView
        android:id="@+id/texts"
        android:layout_width="match_parent"
        android:layout_height="130dp"
        android:background="#000"
        android:gravity="center"
        android:text="標題"
        android:textColor="#ffffff" />


</RelativeLayout>

4.header2布局:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:layout_height="match_parent">

    <LinearLayout
        android:id="@+id/invis2"
        android:layout_width="match_parent"
        android:layout_height="50dp">

        <TextView
            android:id="@+id/tv_suspension"
            android:background="#ccedc7"
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:gravity="center"
            android:text="懸浮部分" />
    </LinearLayout>

    <ImageView
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:background="@mipmap/ic_launcher"/>

</LinearLayout>

懸浮頭部