1、新建类，继承Fragment --导入的是v4的包（向下兼容），利用布局加载器将其与xml结合起来
public class FragmentAddress extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.address_layout,container,false);
return view;
}
}
2、主布局类，继承FragmentActivity。使用FragmentPagerAdapter适配器加载页卡（数据源）
/**对item(页面)切换的相应 */
private void setPager() {
main_viewpager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
int currentItem=main_viewpager.getCurrentItem(); //取得当前的item(或是被点击的)
setTab(currentItem);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
三、主布局的xml文件
<android.support.v4.view.ViewPager
android:id="@+id/vp_main"
android:layout_weight="1"
android:layout_width="match_parent"
android:layout_height="0dp">
</android.support.v4.view.ViewPager>
<include layout="@layout/tab" /> --自定义的tab页卡标题--其中一部分
<LinearLayout
android:id="@+id/ll_weixin"
android:layout_weight="1"
android:orientation="vertical"
android:layout_width="0dp"
android:layout_height="match_parent">
<!--点击事件FALSE掉，不会和父布局冲突-->
<ImageButton
android:id="@+id/ib_weixin"
android:clickable="false"
android:layout_weight="3"
android:background="@mipmap/tab_weixin_normal"
android:layout_gravity="center"
android:layout_width="wrap_content"
android:layout_height="0dp" />
<TextView
android:text="微信"
android:textSize="19sp"
android:layout_gravity="center"
android:textColor="#ffffff"
android:gravity="center"
android:layout_weight="2"
android:layout_width="wrap_content"
android:layout_height="0dp" />
</LinearLayout>
例子如下：
//导入的为v4的fragment包
public class TabActivity extends FragmentActivity implements View.OnClickListener{
private ViewPager main_viewpager;
private FragmentPagerAdapter adapter_fragment;
private List
list_fragment;
private LinearLayout weixin_ll;
private LinearLayout address_ll;
private LinearLayout setting_ll;
private LinearLayout friend_ll;
//改变背景颜色和item 相互对应
private ImageButton weixin_ib;
private ImageButton address_ib;
private ImageButton setting_ib;
private ImageButton friend_ib;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main_tab);
initView();
initEvent(); //点击事件的初始化
}
/**点击事件的初始化 */
private void initEvent() {
weixin_ll.setOnClickListener(this);
address_ll.setOnClickListener(this);
setting_ll.setOnClickListener(this);
friend_ll.setOnClickListener(this);
}
/**初始化控件 */
private void initView() {
//要把点击的属性FALSE掉，不会和父布局冲突
weixin_ib= (ImageButton) findViewById(R.id.ib_weixin);
address_ib= (ImageButton) findViewById(R.id.ib_address);
friend_ib= (ImageButton) findViewById(R.id.ib_friend);
setting_ib= (ImageButton) findViewById(R.id.ib_setting);
weixin_ll= (LinearLayout) findViewById(R.id.ll_weixin);
address_ll= (LinearLayout) findViewById(R.id.ll_address);
friend_ll= (LinearLayout) findViewById(R.id.ll_friend);
setting_ll= (LinearLayout) findViewById(R.id.ll_setting);
main_viewpager= (ViewPager) findViewById(R.id.vp_main);
//將fragment添加進數據源中
list_fragment=new ArrayList<>();
Fragment weixin_fragment=new FragmentWeixin(); //实例化一个Fragment子类对象--自定义的
Fragment address_fragment=new FragmentAddress();
Fragment friend_fragment=new FragmentFriend();
Fragment setting_fragment=new FragmentSetting();
list_fragment.add(weixin_fragment); //加入数组中,,注意顺序
list_fragment.add(address_fragment);
list_fragment.add(friend_fragment);
list_fragment.add(setting_fragment);
initAdapter(); //初始化适配器
main_viewpager.setAdapter(adapter_fragment);
setPager();
setTab(0); //先默认第二个显示--不然一开始都是暗色的/-一起item改变
}
/**对item(页面)切换的相应 */
private void setPager() {
main_viewpager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
int currentItem=main_viewpager.getCurrentItem(); //取得当前的item(或是被点击的)
setTab(currentItem);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
//适配器初始化
private void initAdapter() {
adapter_fragment=new FragmentPagerAdapter(getSupportFragmentManager()) {
@Override
public Fragment getItem(int position) {
return list_fragment.get(position);
}
@Override
public int getCount() {
return list_fragment.size();
}
};
}
/**每一个tab(LinearLayout)---的点击事件 */
@Override
public void onClick(View v) {
resetImage(); //重置所有的imagebutton的背景颜色---暗色
switch (v.getId()){
case R.id.ll_weixin:
setSelect(0); //对点击事件作出具体的反应--传参数方法
break;
case R.id.ll_address:
setSelect(1); //对点击事件作出具体的反应--传参数方法
break;
case R.id.ll_friend:
setSelect(2); //对点击事件作出具体的反应--传参数方法
break;
case R.id.ll_setting:
setSelect(3); //对点击事件作出具体的反应--传参数方法
break;
}
}
/**对传来的点击事件作出响应--图片改变/内容对应 */
private void setSelect(int i) {
setTab(i);
main_viewpager.setCurrentItem(i); //设置当前的item为点击的item
}
/**根据传来的参数i做具体的相应 */
private void setTab(int i) {
resetImage(); //滑动时 重置所有的imagebutton的背景颜色---暗色
switch (i){
case 0:
weixin_ib.setBackgroundResource(R.mipmap.tab_weixin_pressed);
break;
case 1:
address_ib.setBackgroundResource(R.mipmap.tab_address_pressed);
break;
case 2:
friend_ib.setBackgroundResource(R.mipmap.tab_find_frd_pressed);
break;
case 3:
setting_ib.setBackgroundResource(R.mipmap.tab_settings_pressed);
break;
}
}
/**使所有的imagebutton的颜色变暗 */
private void resetImage() {
weixin_ib.setBackgroundResource(R.mipmap.tab_weixin_normal);
address_ib.setBackgroundResource(R.mipmap.tab_address_normal);
friend_ib.setBackgroundResource(R.mipmap.tab_find_frd_normal);
setting_ib.setBackgroundResource(R.mipmap.tab_settings_normal);
}
}package codefirst.materia_design.fragment;
import android.os.Bundle;
import android.support.annotation.Nullable;
import android.support.v4.app.Fragment; //导入的是此包
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import codefirst.materia_design.R;
//各个fragment类 --用来与xml布局文件关联起来
public class FragmentWeixin extends Fragment {
@Nullable
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) {
View view=inflater.inflate(R.layout.weixin_layout,container,false);
return view;
}
}
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