android实现滑动菜单,Android Studio 使用ViewPager + Fragment实现滑动菜单Tab效果 --简易版...

1 packagecom.hyl.acccountbookdemo;2

3 importandroid.graphics.Color;4 importandroid.os.Bundle;5 importandroid.support.v4.app.Fragment;6 importandroid.support.v4.app.FragmentManager;7 importandroid.support.v4.app.FragmentPagerAdapter;8 importandroid.support.v4.view.ViewPager;9 importandroid.support.v7.app.AppCompatActivity;10 importandroid.view.View;11 importandroid.widget.TextView;12

13 importjava.util.ArrayList;14 importjava.util.List;15

16 /**

17 * @programName: MainActivity.java18 * @programFunction: Recording of income and expenditure19 * @createDate: 2018/09/2520 *@author: AnneHan21 *@version:22 * xx. yyyy/mm/dd ver author comments23 * 01. 2018/09/25 1.00 AnneHan New Create24 */

25 public class MainActivity extends AppCompatActivity implementsView.OnClickListener {26 privateTextView item_detail, item_category_report;27 privateViewPager vp;28 privateOneFragment oneFragment;29 privateTwoFragment twoFragment;30 private List mFragmentList = new ArrayList();31 privateFragmentAdapter mFragmentAdapter;32

33 @Override34 protected voidonCreate(Bundle savedInstanceState) {35 super.onCreate(savedInstanceState);36 setContentView(R.layout.activity_main);37

38 initViews();39

40 mFragmentAdapter = new FragmentAdapter(this.getSupportFragmentManager(), mFragmentList);41 vp.setOffscreenPageLimit(2);//ViewPager的缓存为2帧

42 vp.setAdapter(mFragmentAdapter);43 vp.setCurrentItem(0);//初始设置ViewPager选中第一帧

44 item_detail.setTextColor(Color.parseColor("#1ba0e1"));45

46 //ViewPager的监听事件

47 vp.setOnPageChangeListener(newViewPager.OnPageChangeListener() {48 @Override49 public void onPageScrolled(int position, float positionOffset, intpositionOffsetPixels) {50

51 }52

53 @Override54 public void onPageSelected(intposition) {55 /*此方法在页面被选中时调用*/

56 changeTextColor(position);57 }58

59 @Override60 public void onPageScrollStateChanged(intstate) {61 /*此方法是在状态改变的时候调用，其中arg0这个参数有三种状态(0，1，2)。62 arg0==1的时辰默示正在滑动，63 arg0==2的时辰默示滑动完毕了，64 arg0==0的时辰默示什么都没做。*/

65 }66 });67 }68

69 /**

70 * 初始化布局View71 */

72 private voidinitViews() {73 item_detail =(TextView) findViewById(R.id.item_detail);74 item_category_report =(TextView) findViewById(R.id.item_category_report);75

76 item_detail.setOnClickListener(this);77 item_category_report.setOnClickListener(this);78

79 vp =(ViewPager) findViewById(R.id.mainViewPager);80 oneFragment = newOneFragment();81 twoFragment = newTwoFragment();82 //给FragmentList添加数据

83 mFragmentList.add(oneFragment);84 mFragmentList.add(twoFragment);85 }86

87 /**

88 * 点击头部Text 动态修改ViewPager的内容89 */

90 @Override91 public voidonClick(View v) {92 switch(v.getId()) {93 caseR.id.item_detail:94 vp.setCurrentItem(0, true);95 break;96 caseR.id.item_category_report:97 vp.setCurrentItem(1, true);98 break;99 }100 }101

102 public class FragmentAdapter extendsFragmentPagerAdapter {103

104 List fragmentList = new ArrayList();105

106 public FragmentAdapter(FragmentManager fm, ListfragmentList) {107 super(fm);108 this.fragmentList =fragmentList;109 }110

111 @Override112 public Fragment getItem(intposition) {113 returnfragmentList.get(position);114 }115

116 @Override117 public intgetCount() {118 returnfragmentList.size();119 }120

121 }122

123 /**

124 * 由ViewPager的滑动修改头部导航Text的颜色125 *@paramposition126 */

127 private void changeTextColor(intposition) {128 if (position == 0) {129 item_detail.setTextColor(Color.parseColor("#1ba0e1"));130 item_category_report.setTextColor(Color.parseColor("#000000"));131 } else if (position == 1) {132 item_category_report.setTextColor(Color.parseColor("#1ba0e1"));133 item_detail.setTextColor(Color.parseColor("#000000"));134 }135 }136 }