Java tutorial
/* * Copyright (C) 2015-2016 QuickAF * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.lauren.simplenews.view; import android.content.Context; import android.graphics.Canvas; import android.graphics.Paint; import android.support.v4.view.ViewPager; import android.util.AttributeSet; import android.widget.RadioGroup; import com.lauren.simplenews.R; /** * Description * * @author Jamling */ public class MainBottomTab extends RadioGroup implements RadioGroup.OnCheckedChangeListener { public MainBottomTab(Context context) { super(context); } public MainBottomTab(Context context, AttributeSet attrs) { super(context, attrs); } private Paint p = new Paint(Paint.ANTI_ALIAS_FLAG | Paint.DITHER_FLAG); @Override protected void onFinishInflate() { super.onFinishInflate(); p.setColor(getContext().getResources().getColor(R.color.divider)); setWillNotDraw(false); setOnCheckedChangeListener(this); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); canvas.drawLine(0, 0, getWidth(), 1, p); } private ViewPager viewPager; public void setViewPager(ViewPager viewPager) { this.viewPager = viewPager; if (this.viewPager != null) { this.viewPager.addOnPageChangeListener(new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { check(getChildAt(position).getId()); } @Override public void onPageScrollStateChanged(int state) { } }); } } @Override public void onCheckedChanged(RadioGroup group, int checkedId) { if (this.viewPager != null) { for (int i = 0; i < group.getChildCount(); i++) { if (group.getChildAt(i).getId() == checkedId) { this.viewPager.setCurrentItem(i, false); } } } } }