android 标题栏两个按钮滑动切换

package leejw.com.titlebuttonsdemo; import android.app.ActionBar; import android.graphics.Color; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.view.ViewPager; import android.view.View; import android.widget.Button; import android.widget.LinearLayout; import java.util.ArrayList; import leejw.com.titlebuttonsdemo.fragment.GroupChildrenCollect; import leejw.com.titlebuttonsdemo.fragment.GroupChildrenHasBuy; /** * date : 2016/5/24 * author : lijiawei */ public class MainActivity extends FragmentActivity implements View.OnClickListener { private Button topBtn01, topBtn02; private LinearLayout topBtnContainer; private ViewPager mViewPager; private TabPagerAdapter mPagerAdapter; ArrayList<Fragment> fragments = new ArrayList<Fragment>(); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); //如果有actionbar则隐藏 ActionBar bar = this.getActionBar(); if(bar != null){ bar.hide(); } init(); } private void init(){ GroupChildrenCollect groupChildrenCollect = new GroupChildrenCollect(); GroupChildrenHasBuy groupChildrenHasBuy = new GroupChildrenHasBuy(); fragments.add(groupChildrenCollect); fragments.add(groupChildrenHasBuy); topBtn01 = (Button) this.findViewById(R.id.id_dcphGroup_topBtn01); topBtn02 = (Button) this.findViewById(R.id.id_dcphGroup_topBtn02); topBtnContainer = (LinearLayout) this.findViewById(R.id.id_dcphGroup_topBtn_container); topBtn01.setOnClickListener(this); topBtn02.setOnClickListener(this); mViewPager = (ViewPager) this.findViewById(R.id.id_dcphGroup_viewPager); mPagerAdapter = new TabPagerAdapter(this.getSupportFragmentManager(), fragments); mViewPager.setAdapter(mPagerAdapter); mViewPager.invalidate(); mPagerAdapter.notifyDataSetChanged(); } /* * 自定义FragmentStatePagerAdapter适配器来显示滑动Fragment * */ private class TabPagerAdapter extends FragmentStatePagerAdapter implements ViewPager.OnPageChangeListener { private ArrayList<Fragment> objects; public TabPagerAdapter(FragmentManager fm, ArrayList<Fragment> objects) { super(fm); this.objects = objects; mViewPager.setOnPageChangeListener(this); } @Override public Fragment getItem(int position) { return objects.get(position); } @Override public int getCount() { return objects.size(); } @Override public void onPageScrollStateChanged(int arg0) { } @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { //滑动的监听事件 changeFragmentFocus(position); } } @Override public void onClick(View v) { int vId = v.getId(); //改变当前显示的Fragment,显示拼货界面：0， 显示预告界面：1 switch(vId){ case R.id.id_dcphGroup_topBtn01: changeFragmentFocus(0); mViewPager.setCurrentItem(0); break; case R.id.id_dcphGroup_topBtn02: changeFragmentFocus(1); mViewPager.setCurrentItem(1); break; } } private void changeFragmentFocus(int focus){ if(focus == 0){ topBtnContainer.setBackgroundResource(R.drawable.top_btn_shop); topBtn01.setTextColor(Color.rgb(255, 255, 255)); topBtn02.setTextColor(Color.rgb(229, 28, 35)); }else if (focus == 1){ topBtnContainer.setBackgroundResource(R.drawable.top_btn_preview); topBtn01.setTextColor(Color.rgb(229, 28, 35)); topBtn02.setTextColor(Color.rgb(255, 255, 255)); } } }