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这篇文章主要介绍了Android中如何实现自定义选项卡切换效果,具有一定借鉴价值,感兴趣的朋友可以参考下,希望大家阅读完这篇文章之后大有收获,下面让小编带着大家一起了解一下。
本文实例为大家分享了Android自定义选项卡切换效果的具体代码,供大家参考,具体内容如下
1、布局
<?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="232dp" android:layout_height="32dp" android:background="@drawable/leave_back_tab_bg_selector" android:orientation="horizontal"> <TextView android:id="@+id/tvLeaveNum" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/leave_back_button_bg_selector" android:gravity="center" android:layout_weight="1" android:textColor="@color/white" android:textSize="14sp" android:clickable="true" android:focusable="true" android:focusableInTouchMode="true" android:text="@string/leave_crews_num"/> <TextView android:id="@+id/tvBackNum" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/leave_back_button_bg_selector" android:gravity="center" android:layout_weight="1" android:textColor="@color/white" android:textSize="14sp" android:clickable="true" android:focusable="true" android:focusableInTouchMode="true" android:text="@string/back_crews_num"/> </LinearLayout>
leave_back_button_bg_selector:
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item> <shape android:shape="rectangle"> <stroke android:width="1dp" android:color="#328BDD" /> <corners android:radius="3dp" /> <solid android:color="@color/transparent" /> </shape> </item> </selector>
leave_back_button_bg_selector
<?xml version="1.0" encoding="utf-8"?> <selector xmlns:android="http://schemas.android.com/apk/res/android"> <item android:state_focused="true"> <shape android:shape="rectangle"> <stroke android:width="1dp" android:color="#328BDD" /> <corners android:radius="3dp" /> <solid android:color="#328BDD" /> </shape> </item> <item> <shape android:shape="rectangle"> <stroke android:width="1dp" android:color="@color/transparent" /> <corners android:radius="3dp" /> <solid android:color="@color/transparent" /> </shape> </item> </selector>
2、控件封装
import android.content.Context; import android.util.AttributeSet; import android.view.LayoutInflater; import android.view.View; import android.widget.LinearLayout; import android.widget.TextView; import butterknife.BindView; import butterknife.ButterKnife; import butterknife.OnFocusChange; public class LeaveBackTitleTabView extends LinearLayout { public final static int INDEX_LEAVE = 1; public final static int INDEX_BACK = 2; @BindView(R.id.tvBackNum) TextView tvBackNum; @BindView(R.id.tvLeaveNum) TextView tvLeaveNum; private Context mContext; private ITabChangeListener tabChangeListener; public void setTabChangeListener(ITabChangeListener tabChangeListener) { this.tabChangeListener = tabChangeListener; } public LeaveBackTitleTabView(Context context) { super(context); mContext = context; } public LeaveBackTitleTabView(Context context, AttributeSet attrs) { super(context, attrs); mContext = context; View view = (View) LayoutInflater.from(context).inflate(R.layout.view_leave_back_list_tab, this, true); ButterKnife.bind(view); } @OnFocusChange({R.id.tvLeaveNum,R.id.tvBackNum}) public void doFocusChanged(View view){ switch(view.getId()){ case R.id.tvLeaveNum : if(tabChangeListener != null){ tabChangeListener.onTabChanged(INDEX_LEAVE); } break; case R.id.tvBackNum: if(tabChangeListener != null){ tabChangeListener.onTabChanged(INDEX_BACK); } break; } } public void setCrewsNum(int leaveNum,int backNum){ tvLeaveNum.setText(String.format(getResources().getString(R.string.leave_crews_num), String.valueOf(leaveNum))); tvBackNum.setText(String.format(getResources().getString(R.string.back_crews_num), String.valueOf(backNum))); if(leaveNum > 0 && backNum > 0){ tvLeaveNum.requestFocus(); }else if(leaveNum > 0 && backNum == 0){ tvLeaveNum.setClickable(true); tvLeaveNum.setFocusable(true); tvBackNum.setClickable(false); tvBackNum.setFocusable(false); tvLeaveNum.requestFocus(); }else if(leaveNum == 0 && backNum > 0){ tvLeaveNum.setClickable(false); tvLeaveNum.setFocusable(false); tvBackNum.setClickable(true); tvBackNum.setFocusable(true); tvBackNum.requestFocus(); }else{ tvLeaveNum.setClickable(false); tvLeaveNum.setFocusable(false); tvBackNum.setClickable(false); tvBackNum.setFocusable(false); } } /** * TAB切换时的listener */ public interface ITabChangeListener{ public void onTabChanged(int index); } }
3、使用方法
<com.hisign.ship_terminal_hs518.view.LeaveBackTitleTabView android:layout_width="232dp" android:layout_height="32dp" android:layout_marginTop="10dp" android:visibility="gone" android:id="@+id/lttTitle"> </com.hisign.ship_terminal_hs518.view.LeaveBackTitleTabView>
4、注册回调事件(一般在UI界面上进行注册)
/** * 离船和在船船员信息列表 */ private LeaveBackTitleTabView.ITabChangeListener iTabChangeListener = new LeaveBackTitleTabView.ITabChangeListener() { @Override public void onTabChanged(int index) { switch (index) { case LeaveBackTitleTabView.INDEX_LEAVE: // 界面上点击了离船 ll_leave_crews.setVisibility(View.VISIBLE); ll_back_crews.setVisibility(View.GONE); break; case LeaveBackTitleTabView.INDEX_BACK: // 界面上点击了在船 ll_back_crews.setVisibility(View.VISIBLE); ll_leave_crews.setVisibility(View.GONE); break; } } };
5、注意事项:
(1)、控件需要能响应点击事件,同时切换到某一选项时,该选项卡需要显示选中的状态,所以在控件中需要指定:
android:clickable="true" android:focusable="true" android:focusableInTouchMode="true"
但是这样设置了之后,控件就在点击时就不能在点击的第一下响应onClick点击事件,我的做法是响应onFouceChange事件
(2)、为啥这样设置,在点击的第一下就不响应onClick了呢?源码中显示w 在 onTouchEvent() 中的 MotionEvent.ACTION_UP 中对focus做了处理, 如果View focusableInTouchMode 是true, 并且当前没有获得焦点, 那么会尝试获取焦点, 并且不会调用 performClick()。
public boolean onTouchEvent(MotionEvent event) { ... if (((viewFlags & CLICKABLE) == CLICKABLE || (viewFlags & LONG_CLICKABLE) == LONG_CLICKABLE) || (viewFlags & CONTEXT_CLICKABLE) == CONTEXT_CLICKABLE) { switch (action) { case MotionEvent.ACTION_UP: boolean prepressed = (mPrivateFlags & PFLAG_PREPRESSED) != 0; if ((mPrivateFlags & PFLAG_PRESSED) != 0 || prepressed) { boolean focusTaken = false; if (isFocusable() && isFocusableInTouchMode() && !isFocused()) { focusTaken = requestFocus(); } if (prepressed) { setPressed(true, x, y); } if (!mHasPerformedLongPress && !mIgnoreNextUpEvent) { removeLongPressCallback(); if (!focusTaken) { if (mPerformClick == null) { mPerformClick = new PerformClick(); } if (!post(mPerformClick)) { performClick(); } } } ... }
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