效果展示:
首先看activity_main中的布局
<LinearLayout
android:layout_width="match_parent"
android:layout_height="35dp"
android:orientation="horizontal">
<HorizontalScrollView
android:id="@+id/Nav_Hsv"
android:layout_width="0dp"
android:layout_weight="9"
android:layout_height="35dp"
android:fillViewport="false">
<LinearLayout
android:id="@+id/Nav_ll"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="#eee"
android:orientation="horizontal">
</LinearLayout>
</HorizontalScrollView>
</LinearLayout>
<android.support.v4.view.ViewPager
android:id="@+id/vp"
android:layout_width="match_parent"
android:layout_height="0dp"
android:layout_weight="1"/>
再看Activity里的具体实现
public class ShouActivity extends FragmentActivity {
private List<String> type;
private int screenWidth;
private int itemWidth;
private int selectItemIndex = 0;
private LinearLayout nav_ll;
private ViewPager vp;
private HorizontalScrollView hsv;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.activity_main);
type = MyTools.getType();
hsv = (HorizontalScrollView) findViewById(R.id.Nav_Hsv);
hsv.setHorizontalScrollBarEnabled(false);
nav_ll = (LinearLayout) findViewById(R.id.Nav_ll);
vp = (ViewPager) findViewById(R.id.vp);
//设置导航栏菜单
setNav();
//设置viewpager
setViewPager();
}
//设置viewpager
private void setViewPager() {
// 实例化list集合存放fragment
List<Fragment> fragmentList = new ArrayList<Fragment>();
//获取map集合中的数据,遍历集合
Map<String, String> data = MyTools.getData();
for(Map.Entry<String, String> entry : data.entrySet()){
//获取集合中的value值,这里指的是接口地址
MyFragment frame = new MyFragment(entry.getValue());
//放入集合
fragmentList.add(frame);
}
//设置viewpager适配器
vp.setAdapter(new MyFragmentpagerAdapter(getSupportFragmentManager(),fragmentList));
//设置viewpager监听
vp.setOnPageChangeListener(new OnPageChangeListener() {
@Override
public void onPageSelected(int position) {
vp.setCurrentItem(position);
selectType(position);
}
@Override
public void onPageScrolled(int arg0, float arg1, int arg2) {
// TODO Auto-generated method stub
}
@Override
public void onPageScrollStateChanged(int arg0) {
// TODO Auto-generated method stub
}
});
}
private void setNav() {
//获得屏幕总宽度
DisplayMetrics metrics = new DisplayMetrics();
getWindowManager().getDefaultDisplay().getMetrics(metrics);
screenWidth = metrics.widthPixels;
//设置每个item的宽度
itemWidth = screenWidth/type.size();
for(int i=0;i<type.size();i++){
LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(
RadioGroup.LayoutParams.WRAP_CONTENT, RadioGroup.LayoutParams.WRAP_CONTENT);
//设置外边距
params.leftMargin = 10;
params.rightMargin = 10;
//创建Textview实例
TextView localTextView = new TextView(this);
//设置tv的属性
localTextView.setText(type.get(i));
localTextView.setTextSize(15.0f);
localTextView.setPadding(5, 9, 5, 9);
localTextView.setGravity(Gravity.CENTER);
if(i == 0){
localTextView.setTextColor(Color.RED);
}else{
localTextView.setTextColor(Color.parseColor("#666666"));
}
if(selectItemIndex == i){
localTextView.setSelected(true);
}
//设置每个tv的监听
localTextView.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
for(int i=0;i<nav_ll.getChildCount();i++){
TextView tv = (TextView) nav_ll.getChildAt(i);
if(tv == v){
tv.setSelected(true);
vp.setCurrentItem(i);
}else{
tv.setSelected(false);
}
}
}
});
nav_ll.addView(localTextView, i, params);
}
}
protected void selectType(int tab_position) {
selectItemIndex = tab_position;
//通过自动滚动
for(int i=0;i<nav_ll.getChildCount();i++){
TextView tv0 = (TextView) nav_ll.getChildAt(tab_position);
int k = tv0.getMeasuredWidth();
int l = tv0.getLeft();
int j = l+k/2-screenWidth/2;//计算要滚动到的位置
hsv.smoothScrollTo(j, 0);
}
//判断哪一个tv被选中设置字体颜色
for(int i=0;i<nav_ll.getChildCount();i++){
TextView view = (TextView) nav_ll.getChildAt(i);
if(tab_position == i){
view.setTextColor(Color.RED);
view.setSelected(true);
}else{
view.setTextColor(Color.parseColor("#666666"));
view.setSelected(false);
}
}
}
}
MyTools.java
public class MyTools {
public static Map<String,String> getData(){
Map<String,String> map = new LinkedHashMap<String, String>();
map.put("推荐", "http://ic.snssdk.com/2/article/v25/stream/?category=news_world&count=20&min_behot_time=1457664837&bd_city=%E5%8C%97%E4%BA%AC%E5%B8%82&bd_latitude=40.040363&bd_longitude=116.299497&bd_loc_time=1457665192&loc_mode=6&iid=3839775475&device_id=12246433856&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=HONOR%20H30-L02&os_api=19&os_version=4.4.2&uuid=864503020467518&openudid=58561e2e62ae7a9d");
map.put("热点", "http://ic.snssdk.com/2/article/v25/stream/?category=news_hot&count=20&min_behot_time=1457678235&bd_city=%E5%8C%97%E4%BA%AC%E5%B8%82&bd_latitude=40.040344&bd_longitude=116.299473&bd_loc_time=1457746072&loc_mode=6&iid=3839775475&device_id=12246433856&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=HONOR%20H30-L02&os_api=19&os_version=4.4.2&uuid=864503020467518&openudid=58561e2e62ae7a9d");
map.put("北京", "http://lf.snssdk.com/2/article/v25/stream/?category=news_local&count=20&min_behot_time=1457679653&loc_mode=4&user_city=%E5%8C%97%E4%BA%AC&lac=4530&cid=28615&iid=3840045724&device_id=12248484527&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=MX5&os_api=22&os_version=5.1&uuid=868773026086424&openudid=8731cb97031b705c");
map.put("社会", "http://ic.snssdk.com/2/article/v25/stream/?category=news_society&count=20&min_behot_time=1457665368&bd_latitude=4.9E-324&bd_longitude=4.9E-324&bd_loc_time=1457678205&loc_mode=5&lac=4527&cid=28883&iid=3837100257&device_id=12226275484&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=iToolsAVM&os_api=19&os_version=4.4.4&uuid=352284046469130&openudid=84c1c7b192991cc6");
map.put("娱乐", "http://ic.snssdk.com/2/article/v25/stream/?category=news_entertainment&count=20&min_behot_time=1457661848&bd_city=%E5%8C%97%E4%BA%AC%E5%B8%82&bd_latitude=40.040344&bd_longitude=116.299473&bd_loc_time=1457746072&loc_mode=6&iid=3839775475&device_id=12246433856&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=HONOR%20H30-L02&os_api=19&os_version=4.4.2&uuid=864503020467518&openudid=58561e2e62ae7a9d");
map.put("科技", "http://ic.snssdk.com/2/article/v25/stream/?category=news_tech&count=20&min_behot_time=1457664599&bd_city=%E5%8C%97%E4%BA%AC%E5%B8%82&bd_latitude=40.040344&bd_longitude=116.299473&bd_loc_time=1457746072&loc_mode=6&iid=3839775475&device_id=12246433856&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=HONOR%20H30-L02&os_api=19&os_version=4.4.2&uuid=864503020467518&openudid=58561e2e62ae7a9d");
map.put("体育", "http://ic.snssdk.com/2/article/v25/stream/?category=news_sports&count=20&bd_city=%E5%8C%97%E4%BA%AC%E5%B8%82&bd_latitude=40.040344&bd_longitude=116.299473&bd_loc_time=1457746072&loc_mode=6&iid=3839775475&device_id=12246433856&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=HONOR%20H30-L02&os_api=19&os_version=4.4.2&uuid=864503020467518&openudid=58561e2e62ae7a9d");
map.put("视频", "http://ic.snssdk.com/2/article/v25/stream/?category=video&count=20&bd_latitude=4.9E-324&bd_longitude=4.9E-324&bd_loc_time=1457678205&loc_mode=5&lac=4527&cid=28883&iid=3837100257&device_id=12226275484&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=iToolsAVM&os_api=19&os_version=4.4.4&uuid=352284046469130&openudid=84c1c7b192991cc6");
map.put("财经", "http://lf.snssdk.com/2/article/v25/stream/?category=news_finance&count=20&loc_mode=4&iid=3839898905&device_id=10679574422&ac=wifi&channel=baidu&aid=13&app_name=news_article&version_code=460&device_platform=android&device_type=MX5&os_api=22&os_version=5.1&uuid=867992020732921&openudid=db1bf632ed3a9c71");
return map;
}
public static List<String> getType(){
List<String> typelist = Arrays.asList("推荐", "热点", "北京","社会", "娱乐", "科技","体育","视频","财经");
return typelist;
}
}