Android仿微信滑动切换效果 Android实现简单底部导航栏 Android仿微信滑动切换效果
丶白泽 人气:1想了解Android实现简单底部导航栏 Android仿微信滑动切换效果的相关内容吗,丶白泽在本文为您仔细讲解Android仿微信滑动切换效果的相关知识和一些Code实例,欢迎阅读和指正,我们先划重点:Android底部导航栏,Android微信滑动切换,Android滑动切换,下面大家一起来学习吧。
Android仿微信滑动切换最终实现效果:
大体思路:
1. 主要使用两个自定义View配合实现; 底部图标加文字为一个自定义view,底部导航栏为一个载体,根据需要来添加底部图标;
2. 底部导航栏的设置方法类似于TabLayout的关联,View需要创建关联方法,用来关联VIewPager;
3. 通过关联方法获取ViewPager实例后,根据ViewPager页面数创建底部导航栏的图标按钮;
代码实现:
1. 新建第一个自定义View, 图标 + 文字 的底部按钮;
/** * 自定义控件,该控件为底部导航栏中的图标 * Created by MrZheng on 2017/8/2. */ public class TabView extends LinearLayout { BotBean mBean; private TextView title; private ImageView iconImage; /** * 引用此控件,只能通过new 方法;接收一个TabView * @param context */ public TabView(Context context, BotBean bean) { super(context); this.mBean = bean; initView(); } /** * 初始化布局 */ public void initView() { setOrientation(VERTICAL); setGravity(Gravity.CENTER); //添加小图标 iconImage = new ImageView(getContext()); LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT , ViewGroup.LayoutParams.WRAP_CONTENT); iconImage.setLayoutParams(layoutParams); iconImage.setImageResource(mBean.getUncheckedId()); Drawable drawable = getContext().getResources().getDrawable(mBean.getUncheckedId()); Drawable wrapDrawable = DrawableCompat.wrap(drawable); DrawableCompat.setTintList(wrapDrawable, ColorStateList.valueOf(Color.BLACK)); iconImage.setImageDrawable(wrapDrawable); addView(iconImage); //标题 title = new TextView(getContext()); LinearLayout.LayoutParams titleParams = new LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT); title.setLayoutParams(titleParams); title.setText(mBean.getContent()); addView(title); } //判断选择状态,改变图标 //供外部调用 public void setSelected(boolean isSelected) { if (mBean == null) { return; } if (isSelected) { if (iconImage != null) { //使用颜色过滤器,改变选中时的颜色 Drawable drawable = getContext().getResources().getDrawable(mBean.getUncheckedId()); Drawable wrapDrawable = DrawableCompat.wrap(drawable); DrawableCompat.setTintList(wrapDrawable, ColorStateList.valueOf(Color.GREEN)); iconImage.setImageDrawable(wrapDrawable); title.setTextColor(Color.GREEN); } } else { if (title != null) { // iconImage.setImageResource(mBean.getUncheckedId()); Drawable drawable = getContext().getResources().getDrawable(mBean.getUncheckedId()); Drawable wrapDrawable = DrawableCompat.wrap(drawable); DrawableCompat.setTintList(wrapDrawable, ColorStateList.valueOf(Color.BLACK)); iconImage.setImageDrawable(wrapDrawable); title.setTextColor(Color.GRAY); } } } }
2. 创建第二个自定义View,该View为底部导航栏载体,根据 关联的ViewPager页面 个数创建 底部导航栏图标;
/** * 该控件为底部导航栏图标载体 * Created by MrZheng on 2017/8/2. */ public class bottomView extends LinearLayout { private ViewPager vp; BottomPageChangeListener mBottomPageChangeListener; public bottomView(Context context) { super(context); } public bottomView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); } public bottomView(Context context, @Nullable AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); } /** * 同TabLayout用法相似,需要与ViewPager进行绑定 */ public void setViewPager(ViewPager viewPager, ArrayList<BotBean> botBeen,BottomPageChangeListener bottomPageChangeListener) { if (viewPager == null) { return; } vp = viewPager; mBottomPageChangeListener = bottomPageChangeListener; initTabView(botBeen); //设置ViewPager的点击事件 vp.addOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener(){ @Override public void onPageSelected(int position) { for (int i = 0; i < getChildCount(); i++) { getChildAt(i).setSelected((position == i ? true : false)); } if (mBottomPageChangeListener != null) { mBottomPageChangeListener.onPageChangeListener(position); } } }); } /** * 初始化底部导航栏,ViewPager有多少页,就创建多少个图标 */ public void initTabView(ArrayList<BotBean> botBeen) { setGravity(HORIZONTAL); for (int i = 0; i < botBeen.size(); i++) { BotBean bean = botBeen.get(i); TabView tabView = new TabView(getContext(), bean); LinearLayout.LayoutParams params = new LinearLayout.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT , ViewGroup.LayoutParams.WRAP_CONTENT); params.weight = 1; params.gravity = Gravity.CENTER; tabView.setLayoutParams(params); //为每个view设置点击事件,点击跳转过去 final int finalI = i; tabView.setOnClickListener(new OnClickListener() { @Override public void onClick(View view) { vp.setCurrentItem(finalI); } }); //设置一开始选中状态 if (i == 0) { tabView.setSelected(true); //由于初始化时,onPageSelected()选中方法并没有的到执行,所以主动去调用回调方法 if (mBottomPageChangeListener != null) { mBottomPageChangeListener.onPageChangeListener(i); } } addView(tabView); } } /** * 提供接口回调方法,每次滑动都通知外界 */ public interface BottomPageChangeListener{ void onPageChangeListener(int position); } }
3. 添加 图标自定义类, 该类封装着底部导航栏中每一个选项的的图标和文字,将该类型对象添加到集合中,用于给底部导航栏设置图标;
/** * 底部导航栏的封装类,该类对象用于在底部导航栏添加对应图标和文字 * Created by MrZheng on 2017/8/2. */ public class BotBean { String content;//图标名字 int uncheckedId;//未选中时的图标 public BotBean(String content, int uncheckedId) { this.content = content; this.uncheckedId = uncheckedId; } public String getContent() { return content; } public void setContent(String content) { this.content = content; } public int getUncheckedId() { return uncheckedId; } public void setUncheckedId(int uncheckedId) { this.uncheckedId = uncheckedId; } }
自定义View实现完成,在Fragment或Activity中使用该View:
1. 在布局文件中添加:
<zhengyanze.com.bottomdemo.widget.bottomView android:id="@+id/bottom" android:layout_width="match_parent" android:layout_height="60dp"> </zhengyanze.com.bottomdemo.widget.bottomView>
2. 在活动或碎片中添加:
public class MainActivity extends AppCompatActivity { ArrayList<Fragment> mFragments; ArrayList<BotBean> mItemIcon;//存放底部图标和文字 private TextView tv; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); mFragments = new ArrayList<>(); mItemIcon = new ArrayList<>(); mFragments.add(new TextFragment()); mFragments.add(new TextFragment()); mFragments.add(new TextFragment()); mFragments.add(new TextFragment()); mItemIcon.add(new BotBean("首页", R.mipmap.ic_home2)); mItemIcon.add(new BotBean("通讯录", R.mipmap.ic_study2)); mItemIcon.add(new BotBean("发现", R.mipmap.ic_found2)); mItemIcon.add(new BotBean("我的", R.mipmap.ic_me2)); ViewPager vp = (ViewPager) findViewById(R.id.vp); vp.setAdapter(new FAdapter(getSupportFragmentManager())); tv = (TextView) findViewById(R.id.tv); bottomView bottom = (bottomView) findViewById(R.id.bottom); bottom.setViewPager(vp, mItemIcon, new bottomView.BottomPageChangeListener() { @Override public void onPageChangeListener(int position) { //滑动后的回调 tv.setText(mItemIcon.get(position).getContent()); } }); } /** * 适配器 */ class FAdapter extends FragmentPagerAdapter { public FAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int position) { return mFragments.get(position); } @Override public int getCount() { return mFragments.size(); } } }
总结:该代码耦合度较高,有些代码可能不太合理;欢迎大牛们给出合理建议;
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