本文实例为大家分享了Android实现底部切换标签的具体代码，供大家参考，具体内容如下

实现底部通用切换标签 ，嵌套Fragment，方便自定义布局

自定义控件：

widget_tab_view.xml

<?xml version="1.0" encoding="utf-8"?><merge xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent"> <ImageView android:id="@+id/tab_image" android:layout_width="20dp" android:layout_height="20dp" /> <TextView android:id="@+id/tab_label" android:layout_width="wrap_content" android:layout_height="wrap_content" android:textColor="#666666" android:textSize="12sp" /></merge>

定义单个标签

public class TabView extends LinearLayout { private ImageView mTabImage; private TextView mTabLable; public TabView(Context context) { super(context); initView(context); } public TabView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); initView(context); } public TabView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(context); } private void initView(Context context) { setOrientation(VERTICAL); setGravity(Gravity.CENTER); LayoutInflater.from(context).inflate(R.layout.widget_tab_view, this, true); mTabImage = (ImageView) findViewById(R.id.tab_image); mTabLable = (TextView) findViewById(R.id.tab_label); } public void initData(TabItem tabItem) { mTabImage.setImageResource(tabItem.imageResId); mTabLable.setText(tabItem.lableResId); }}

定义单个标签的entity

public class TabItem { public int imageResId; public int lableResId; public Class<? extends Fragment> tagFragmentClz; public TabItem(int imageResId, int lableResId) { this.imageResId = imageResId; this.lableResId = lableResId; } public TabItem(int imageResId, int lableResId, Class<? extends Fragment> tagFragmentClz) { this.imageResId = imageResId; this.lableResId = lableResId; this.tagFragmentClz = tagFragmentClz; }}

定义底部切换标签控件

public class BottomTabLayout extends LinearLayout implements View.OnClickListener { private ArrayList<TabItem> tabs; private OnTabClickListener listener; private int tabCount; private View selectedView; public BottomTabLayout(Context context) { super(context); initView(); } public BottomTabLayout(Context context, @Nullable AttributeSet attrs) { super(context, attrs); initView(); } public BottomTabLayout(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); initView(); } private void initView() { setOrientation(HORIZONTAL); } public void setCurrentTab(int i) { if (i < tabCount && i >= 0) { View view = getChildAt(i); onClick(view); } } public void initData(ArrayList<TabItem> tabs, OnTabClickListener listener) { this.tabs = tabs; this.listener = listener; LayoutParams params = new LayoutParams(0, ViewGroup.LayoutParams.MATCH_PARENT); params.weight = 1; params.gravity = Gravity.CENTER; if (tabs != null && tabs.size() > 0) { tabCount = tabs.size(); TabView mTabView = null; for (int i = 0, len = tabs.size(); i < len; i++) { mTabView = new TabView(getContext()); mTabView.setTag(tabs.get(i)); mTabView.initData(tabs.get(i)); mTabView.setOnClickListener(this); addView(mTabView, params); } } else { throw new IllegalArgumentException("tabs can not be empty"); } } @Override public void onClick(View view) { if (selectedView != view) { listener.onTabClick((TabItem) view.getTag()); view.setSelected(true); if (selectedView != null) { selectedView.setSelected(false); } selectedView = view; } } public interface OnTabClickListener { void onTabClick(TabItem tabItem); }}

Activity

public class MainActivity extends AppCompatActivity implements BottomTabLayout.OnTabClickListener { private BottomTabLayout tab_layout; private ArrayList<TabItem> tabs; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); setTitle("底部切换标签"); tab_layout = (BottomTabLayout) findViewById(R.id.tab_layout); initBottomTab(); tab_layout.setCurrentTab(0); } private void initBottomTab() { tabs = new ArrayList<>(); tabs.add(new TabItem(R.drawable.selector_tab_msg, R.string.wechat, OneFragment.class)); tabs.add(new TabItem(R.drawable.selector_tab_contact, R.string.contacts, TwoFragment.class)); tabs.add(new TabItem(R.drawable.selector_tab_moments, R.string.discover, ThreeFragment.class)); tabs.add(new TabItem(R.drawable.selector_tab_profile, R.string.me, FourFragment.class)); tab_layout.initData(tabs, this); } private Fragment lastFragment; @Override public void onTabClick(TabItem tabItem) { try { Fragment tmpFragment = getSupportFragmentManager().findFragmentByTag(tabItem.tagFragmentClz.getSimpleName()); FragmentTransaction transaction = getSupportFragmentManager().beginTransaction(); if (tmpFragment == null) { tmpFragment = tabItem.tagFragmentClz.newInstance(); transaction.add(R.id.fl_container, tmpFragment, tabItem.tagFragmentClz.getSimpleName()); if (lastFragment != null) { transaction.hide(lastFragment); } transaction.commitAllowingStateLoss(); } else { transaction.show(tmpFragment); if (lastFragment != null) { transaction.hide(lastFragment); } transaction.commitAllowingStateLoss(); } lastFragment = tmpFragment; } catch (Exception e) { e.printStackTrace(); } }}

布局文件

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" tools:context="com.sample.bottomtab.MainActivity"> <FrameLayout android:id="@+id/fl_container" android:layout_width="match_parent" android:layout_height="0dp" android:layout_weight="1" android:background="#ffffff" /> <View android:layout_width="match_parent" android:layout_height="1dp" android:background="#dcdcdc" /> <com.sample.bottomtab.widget.bottomtab.BottomTabLayout android:id="@+id/tab_layout" android:layout_width="match_parent" android:layout_height="48dp" android:background="#ffffff" /></LinearLayout>

代码下载：Android底部切换标签

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。