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

android:layout_width="match_parent"

android:layout_height="match_parent">

android:id="@+id/tab_image"

android:layout_width="20dp"

android:layout_height="20dp" />

android:id="@+id/tab_label"

android:layout_width="wrap_content"

android:layout_height="wrap_content"

android:textColor="#666666"

android:textSize="12sp" />

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 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 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 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

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">

android:id="@+id/fl_container"

android:layout_width="match_parent"

android:layout_height="0dp"

android:layout_weight="1"

android:background="#ffffff" />

android:layout_width="match_parent"

android:layout_height="1dp"

android:background="#dcdcdc" />

android:id="@+id/tab_layout"

android:layout_width="match_parent"

android:layout_height="48dp"

android:background="#ffffff" />

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脚本之家。