ViewPager+Fragment的结合使用
2014-04-14 14:45
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效果如图:
实现代码解析:
MainActivity.java
1.引入布局文件
2.4个标题控件的初始化以及点击事件的监听设置
3.viewpager控件的初始化,获取Fragment对象并保存在容器中,设置viewpager的适配器和监听
4.viewpager的监听OnPageChangeListener方法的实现,主要是标题栏下的指示横线的移动操作。
TestFragment
获取Fragment对应的布局,并且设置相应的参数。
MyFragmentPagerAdapter
对包含Fragment对象的容器进行适配。
实现代码解析:
MainActivity.java
1.引入布局文件
2.4个标题控件的初始化以及点击事件的监听设置
3.viewpager控件的初始化,获取Fragment对象并保存在容器中,设置viewpager的适配器和监听
4.viewpager的监听OnPageChangeListener方法的实现,主要是标题栏下的指示横线的移动操作。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 | package com.aven.qqdemo; import java.util.ArrayList; import java.util.List; import android.content.res.Resources; import android.os.Bundle; import android.os.Parcelable; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.app.FragmentTransaction; import android.support.v4.view.ViewPager; import android.support.v4.view.ViewPager.OnPageChangeListener; import android.util.DisplayMetrics; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.Window; import android.view.animation.Animation; import android.view.animation.TranslateAnimation; import android.widget.ImageView; import android.widget.TextView; import com.demo.R; /** * 参考原作者D.Winter基础, * * @author avenwu * iamavenwu@gmail.com * */ public class MainActivity extends FragmentActivity { private static final String TAG = "MainActivity"; private ViewPager mPager; private ArrayList<Fragment> fragmentsList; private ImageView ivBottomLine; private TextView tvTabActivity, tvTabGroups, tvTabFriends, tvTabChat; private int currIndex = 0; private int bottomLineWidth; private int offset = 0; private int position_one; private int position_two; private int position_three; private Resources resources; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.main); resources = getResources(); InitWidth(); InitTextView(); InitViewPager(); } private void InitTextView() { tvTabActivity = (TextView) findViewById(R.id.tv_tab_activity); tvTabGroups = (TextView) findViewById(R.id.tv_tab_groups); tvTabFriends = (TextView) findViewById(R.id.tv_tab_friends); tvTabChat = (TextView) findViewById(R.id.tv_tab_chat); tvTabActivity.setOnClickListener(new MyOnClickListener(0)); tvTabGroups.setOnClickListener(new MyOnClickListener(1)); tvTabFriends.setOnClickListener(new MyOnClickListener(2)); tvTabChat.setOnClickListener(new MyOnClickListener(3)); } private void InitViewPager() { mPager = (ViewPager) findViewById(R.id.vPager); fragmentsList = new ArrayList<Fragment>(); Fragment activityfragment = TestFragment.newInstance("Hello Activity."); Fragment groupFragment = TestFragment.newInstance("Hello Group."); Fragment friendsFragment=TestFragment.newInstance("Hello Friends."); Fragment chatFragment=TestFragment.newInstance("Hello Chat."); fragmentsList.add(activityfragment); fragmentsList.add(groupFragment); fragmentsList.add(friendsFragment); fragmentsList 1893f .add(chatFragment); mPager.setAdapter(new MyFragmentPagerAdapter(getSupportFragmentManager(), fragmentsList)); mPager.setCurrentItem(0); mPager.setOnPageChangeListener(new MyOnPageChangeListener()); } private void InitWidth() { ivBottomLine = (ImageView) findViewById(R.id.iv_bottom_line); bottomLineWidth = ivBottomLine.getLayoutParams().width; Log.d(TAG, "cursor imageview width=" + bottomLineWidth); DisplayMetrics dm = new DisplayMetrics(); getWindowManager().getDefaultDisplay().getMetrics(dm); int screenW = dm.widthPixels; offset = (int) ((screenW / 4.0 - bottomLineWidth) / 2); Log.i("MainActivity", "offset=" + offset); position_one = (int) (screenW / 4.0); position_two = position_one * 2; position_three = position_one * 3; } public class MyOnClickListener implements View.OnClickListener { private int index = 0; public MyOnClickListener(int i) { index = i; } @Override public void onClick(View v) { mPager.setCurrentItem(index); } }; public class MyOnPageChangeListener implements OnPageChangeListener { @Override public void onPageSelected(int arg0) { Animation animation = null; switch (arg0) { case 0: if (currIndex == 1) { animation = new TranslateAnimation(position_one, 0, 0, 0); tvTabGroups.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 2) { animation = new TranslateAnimation(position_two, 0, 0, 0); tvTabFriends.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 3) { animation = new TranslateAnimation(position_three, 0, 0, 0); tvTabChat.setTextColor(resources.getColor(R.color.lightwhite)); } tvTabActivity.setTextColor(resources.getColor(R.color.white)); break; case 1: if (currIndex == 0) { animation = new TranslateAnimation(0, position_one, 0, 0); tvTabActivity.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 2) { animation = new TranslateAnimation(position_two, position_one, 0, 0); tvTabFriends.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 3) { animation = new TranslateAnimation(position_three, position_one, 0, 0); tvTabChat.setTextColor(resources.getColor(R.color.lightwhite)); } tvTabGroups.setTextColor(resources.getColor(R.color.white)); break; case 2: if (currIndex == 0) { animation = new TranslateAnimation(0, position_two, 0, 0); tvTabActivity.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 1) { animation = new TranslateAnimation(position_one, position_two, 0, 0); tvTabGroups.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 3) { animation = new TranslateAnimation(position_three, position_two, 0, 0); tvTabChat.setTextColor(resources.getColor(R.color.lightwhite)); } tvTabFriends.setTextColor(resources.getColor(R.color.white)); break; case 3: if (currIndex == 0) { animation = new TranslateAnimation(0, position_three, 0, 0); tvTabActivity.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 1) { animation = new TranslateAnimation(position_one, position_three, 0, 0); tvTabGroups.setTextColor(resources.getColor(R.color.lightwhite)); } else if (currIndex == 2) { animation = new TranslateAnimation(position_two, position_three, 0, 0); tvTabFriends.setTextColor(resources.getColor(R.color.lightwhite)); } tvTabChat.setTextColor(resources.getColor(R.color.white)); break; } currIndex = arg0; animation.setFillAfter(true); animation.setDuration(300); ivBottomLine.startAnimation(animation); } @Override public void onPageScrolled(int arg0, float arg1, int arg2) { } @Override public void onPageScrollStateChanged(int arg0) { } } } |
获取Fragment对应的布局,并且设置相应的参数。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | package com.aven.qqdemo; import com.demo.R; import android.os.Bundle; import android.support.v4.app.Fragment; import android.util.Log; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; public class TestFragment extends Fragment { private static final String TAG = "TestFragment"; private String hello;// = "hello android"; private String defaultHello = "default value"; static TestFragment newInstance(String s) { TestFragment newFragment = new TestFragment(); Bundle bundle = new Bundle(); bundle.putString("hello", s); newFragment.setArguments(bundle); return newFragment; } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); Log.d(TAG, "TestFragment-----onCreate"); Bundle args = getArguments(); hello = args != null ? args.getString("hello") : defaultHello; } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container,Bundle savedInstanceState) { Log.d(TAG, "TestFragment-----onCreateView"); View view = inflater.inflate(R.layout.lay1, container, false); TextView viewhello = (TextView) view.findViewById(R.id.tv_hello); viewhello.setText(hello); return view; } @Override public void onDestroy() { super.onDestroy(); Log.d(TAG, "TestFragment-----onDestroy"); } } |
对包含Fragment对象的容器进行适配。
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | package com.aven.qqdemo; import java.util.ArrayList; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; public class MyFragmentPagerAdapter extends FragmentPagerAdapter { private ArrayList<Fragment> fragmentsList; public MyFragmentPagerAdapter(FragmentManager fm) { super(fm); } public MyFragmentPagerAdapter(FragmentManager fm, ArrayList<Fragment> fragments) { super(fm); this.fragmentsList = fragments; } @Override public int getCount() { return fragmentsList.size(); } @Override public Fragment getItem(int arg0) { return fragmentsList.get(arg0); } @Override public int getItemPosition(Object object) { return super.getItemPosition(object); } } |
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