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RadioGroup实现底部导航栏效果,如图::
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实现可最基本的导航栏功能,不能左右滑动,只能点击
1.内嵌的fragment的布局:
<?xml version="1.0" encoding="utf-8"?>
2.fragment的activity代码:
public class FrHome extends Fragment { @Nullable @Override public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { View view = LayoutInflater.from(getContext()).inflate(R.layout.fragment_home, container, false); return view; } }
以此为例根据需要编写不同的fragment布局等等。
3.装载fragment的界面布局如下(其中使用了selector进行实现点击改变图标和文字颜色):
点击改变文字颜色:
<?xml version="1.0" encoding="utf-8"?>
点击改变图标:
<?xml version="1.0" encoding="utf-8"?>
界面布局:
<?xml version="1.0" encoding="utf-8"?>
4.装载fragment的界面的activity代码(加入双击返回键则退出应用):
public class ActHome extends FragmentActivity implements RadioGroup.OnCheckedChangeListener { @BindView(R.id.frame_layout) FrameLayout frameLayout; @BindView(R.id.tab_home) RadioButton tabHome; @BindView(R.id.tab_health) RadioButton tabHealth; @BindView(R.id.tab_personal) RadioButton tabPersonal; @BindView(R.id.tab_bar) RadioGroup tabBar; public final static String ACTION_EXIT_SYSTEM = "sys_exit"; private FragmentManager manager; private FragmentTransaction transaction; private FrHome frHome; private FrHealth frHealth; private FrPersonal frPersonal; private long mExitTime; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_home); ButterKnife.bind(this); RadioButton tabHome = (RadioButton) tabBar.getChildAt(0); tabHome.setChecked(true); tabBar.setOnCheckedChangeListener(this); initFragment(); } private void initFragment() { manager = getSupportFragmentManager(); transaction = manager.beginTransaction(); frHome = new FrHome(); transaction.add(R.id.frame_layout,frHome); transaction.commit(); } @Override public void onCheckedChanged(RadioGroup radioGroup, @IdRes int checkedId) { switch (checkedId) { case R.id.tab_home: FragmentTransaction ft1 = manager.beginTransaction(); hideAll(ft1); if (frHome!=null){ ft1.show(frHome); }else { frHome=new FrHome(); ft1.add(R.id.frame_layout,frHome); } ft1.commit(); break; case R.id.tab_health: FragmentTransaction ft2 = manager.beginTransaction(); hideAll(ft2); if (frHealth!=null){ ft2.show(frHealth); }else { frHealth = new FrHealth(); ft2.add(R.id.frame_layout,frHealth); } ft2.commit(); break; case R.id.tab_personal: FragmentTransaction ft5 = manager.beginTransaction(); hideAll(ft5); if (frPersonal!=null){ ft5.show(frPersonal); }else { frPersonal = new FrPersonal(); ft5.add(R.id.frame_layout, frPersonal); } ft5.commit(); break; } } private void hideAll(FragmentTransaction ft){ if (ft==null){ return; } if (frHome!=null){ ft.hide(frHome); } if (frHealth!=null){ ft.hide(frHealth); } if (frPersonal!=null){ ft.hide(frPersonal); } } @Override public void onBackPressed() { if ((System.currentTimeMillis() - mExitTime) > 2000) { Toast.makeText(ActHome.this,"再按一次退出程序",Toast.LENGTH_SHORT).show(); mExitTime = System.currentTimeMillis(); } else { new Handler().postDelayed(new Runnable() { @Override public void run() { onExit(ActHome.this); } }, 500); } } public static void onExit(final Context context) { try { Intent intent = new Intent(); intent.setAction(context.getApplicationContext().getPackageName() + ACTION_EXIT_SYSTEM); context.sendBroadcast(intent); // MobclickAgent.onKillProcess(context); new Handler().postDelayed(new Runnable() { @Override public void run() { System.exit(0); } }, 200); } catch (Exception e) { e.printStackTrace(); } } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持创新互联。