Android实现底部切换标签

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

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 tagFragmentClz;

  public TabItem(int imageResId, int lableResId) {
    this.imageResId = imageResId;
    this.lableResId = lableResId;
  }

  public TabItem(int imageResId, int lableResId, Class 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

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考高分网。