首先我们先看下封装的基础类TabLayoutView.java类
public class TabLayoutView extends LinearLayout {
private Context context;
private String[] titles; //要显示的标题
private int[] imgs; //图标
private int[] imgsSelected; //图标
private int imgwidth;
private int imgheight;
private int txtsize; //标题大小
private int txtColor; //标题未选中颜色
private int txtSelectedColor; //选择颜色
private List textViews; //保存标题
private List imageViews; //保存图片
private List tvDots;//保存圆点
private List tvImgs;//保存小红点
private int currentIndex = 0;
private OnItemOnclickListener onItemOnclickListener;
public TabLayoutView(Context context) {
this(context, null);
}
public TabLayoutView(Context context, AttributeSet attrs) {
this(context, attrs, 0);
}
public TabLayoutView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
this.context = context;
}
public void setOnItemOnclickListener(OnItemOnclickListener onItemOnclickListener) {
this.onItemOnclickListener = onItemOnclickListener;
}
/**
* 设置标题、图片和当前选中的条目
*
* @param tabtxts
* @param imgs
* @param currentIndex
*/
public void setDataSource(String[] tabtxts, int[] imgs, int[] imgsSelected, int currentIndex) {
this.titles = tabtxts;
this.imgs = imgs;
this.currentIndex = currentIndex;
this.imgsSelected = imgsSelected;
}
/**
* 设置图标大小
*
* @param imgwidth 图标的宽度
* @param imgheight 图标的高度
*/
public void setImageStyle(int imgwidth, int imgheight) {
this.imgwidth = dip2px(context, imgwidth);
this.imgheight = dip2px(context, imgheight);
}
/**
* 设置标题颜色
*
* @param txtsize 文字大小
* @param txtColor 文字未选中颜色
* @param txtSelectedColor 文字选中时颜色
*/
public void setTextStyle(int txtsize, int txtColor, int txtSelectedColor) {
this.txtsize = txtsize;
this.txtColor = txtColor;
this.txtSelectedColor = txtSelectedColor;
}
/**
* 动态布局
* 1、外层为横向线下布局
* 2、动态添加相对布局，平分父布局，使宽度一致，添加到横向布局中
* 3、总线布局添加图标和标题，并添加到相对布局中
* 4、添加圆点到相对布局中，并设置在3的右上角
*/
public void initDatas() {
textViews = new ArrayList<>();
imageViews = new ArrayList<>();
tvDots = new ArrayList<>();
tvImgs = new ArrayList<>();
setOrientation(HORIZONTAL);
LayoutParams lp = new LayoutParams(0, ViewGroup.LayoutParams.MATCH_PARENT);
lp.weight = 1;
lp.gravity = Gravity.CENTER;
LayoutParams imglp = new LayoutParams(imgwidth, imgheight);
imglp.gravity = Gravity.CENTER;
LayoutParams txtlp = new LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
txtlp.gravity = Gravity.CENTER;
RelativeLayout.LayoutParams rlp = new RelativeLayout.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
rlp.addRule(RelativeLayout.CENTER_IN_PARENT, RelativeLayout.TRUE);
int size = titles.length;
for (int i = 0; i < size; i++) {
ImageView imageView = new ImageView(context);
imageView.setLayoutParams(imglp);
imageView.setScaleType(ImageView.ScaleType.FIT_XY);
TextView textView = new TextView(context);
textView.setText(titles[i]);
textView.setLayoutParams(txtlp);
textView.setTextSize(txtsize);
LinearLayout cly = new LinearLayout(context);
cly.setId(i + 100);
cly.setGravity(Gravity.CENTER);
cly.setOrientation(VERTICAL);
cly.setLayoutParams(imglp);
cly.addView(imageView);
RelativeLayout prl = new RelativeLayout(context);
RelativeLayout.LayoutParams rlDot = new RelativeLayout.LayoutParams(dip2px(context, 12), dip2px(context, 12));
rlDot.addRule(RelativeLayout.RIGHT_OF, cly.getId());
rlDot.addRule(RelativeLayout.ABOVE, cly.getId());
rlDot.setMargins(-dip2px(context, 10), 0, 0, -dip2px(context, 10));
TextView tvDot = new TextView(context);
tvDot.setText("0");
tvDot.setTextSize(10);
tvDot.setGravity(Gravity.CENTER);
tvDot.setVisibility(GONE);
tvDot.setTextColor(context.getResources().getColor(R.color.white));
tvDot.setBackgroundDrawable(context.getResources().getDrawable(R.drawable.circle_dot_red_bg));
RelativeLayout.LayoutParams rlimgDot = new RelativeLayout.LayoutParams(dip2px(context, 8), dip2px(context, 8));
rlimgDot.addRule(RelativeLayout.RIGHT_OF, cly.getId());
rlimgDot.addRule(RelativeLayout.ABOVE, cly.getId());
rlimgDot.setMargins(-dip2px(context, 5), 0, 0, -dip2px(context, 5));
ImageView imgDot = new ImageView(context);
imgDot.setImageResource(R.drawable.circle_dot_red_bg);
imgDot.setVisibility(GONE);
final int index = i;
prl.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View view) {
setSelectStyle(index);
if (onItemOnclickListener != null) {
onItemOnclickListener.onItemClick(index);
}
}
});
cly.addView(textView);
prl.addView(cly, rlp);
prl.addView(tvDot, rlDot);
prl.addView(imgDot, rlimgDot);
addView(prl, lp);
textViews.add(textView);
imageViews.add(imageView);
tvDots.add(tvDot);
tvImgs.add(imgDot);
}
setSelectStyle(currentIndex);
}
public void setSelectStyle(int index) {
int size = titles.length;
for (int i = 0; i < size; i++) {
if (i == index) {
textViews.get(i).setTextColor(context.getResources().getColor(txtSelectedColor));
imageViews.get(i).setSelected(true);
imageViews.get(i).setImageResource(imgsSelected[i]);
} else {
textViews.get(i).setTextColor(context.getResources().getColor(txtColor));
imageViews.get(i).setSelected(false);
imageViews.get(i).setImageResource(imgs[i]);
}
}
}
/**
* 设置圆点
*
* @param index 圆点索引
* @param count 圆点个数
*/
public void setDotsCount(int index, int count) {
if (tvDots == null || index > tvDots.size() - 1)
return;
if (count > 0) {
tvDots.get(index).setVisibility(VISIBLE);
tvDots.get(index).setText(count + "");
tvImgs.get(index).setVisibility(GONE);
} else if (count == -1) {
tvDots.get(index).setVisibility(GONE);
tvImgs.get(index).setVisibility(VISIBLE);
} else {
tvDots.get(index).setVisibility(GONE);
tvImgs.get(index).setVisibility(GONE);
}
}
public interface OnItemOnclickListener {
void onItemClick(int index);
}
private int sp2px(Context context, float spValue) {
final float fontScale = context.getResources().getDisplayMetrics().scaledDensity;
return (int) (spValue * fontScale + 0.5f);
}
private int dip2px(Context context, float dipValue) {
final float scale = context.getResources().getDisplayMetrics().density;
return (int) (dipValue * scale + 0.5f);
}
}
我们再来看一下Activity对应的xml文件
这里由于项目需求，我使用的是不可滑动的NoScrollViewPager，代码如下：
/**
* 不可以滑动，但是可以setCurrentItem的ViewPager。
*/
public class NoScrollViewPager extends ViewPager {
public NoScrollViewPager(Context context) {
super(context);
}
public NoScrollViewPager(Context context, AttributeSet attrs) {
super(context, attrs);
}
@Override
public boolean onTouchEvent(MotionEvent arg0) {
return false;
}
@Override
public boolean onInterceptTouchEvent(MotionEvent arg0) {
return false;
}
}
如果你希望可以滑动切换，直接用ViewPager就可以了。
然后我们直接需要导航的Activity中使用
public class MainActivity extends AppCompatActivity {
private ViewPager viewPager;
private TabLayoutView tabLayoutView;
private String[] titles = {"附近", "动态", "消息", "发现", "我的"};
private int[] imgs = {R.mipmap.icon_nearby, R.mipmap.icon_circle, R.mipmap.icon_message, R.mipmap.icon_find, R.mipmap.icon_me};
private int[] imgsselect = {R.mipmap.icon_nearby_selected, R.mipmap.icon_circle_selected, R.mipmap.icon_message_selected, R.mipmap.icon_find_selected, R.mipmap.icon_me_selected};
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
viewPager = (ViewPager) findViewById(R.id.viewpager);
tabLayoutView = (TabLayoutView) findViewById(R.id.tabview);
initFragments();
tabLayoutView.setDataSource(titles, imgs,imgsselect,0);
tabLayoutView.setImageStyle(25, 25);
tabLayoutView.setTextStyle(12, R.color.color_999999,R.color.color_ff78a3);
tabLayoutView.initDatas();
setDots();
tabLayoutView.setOnItemOnclickListener(new TabLayoutView.OnItemOnclickListener() {
@Override
public void onItemClick(int index) {
viewPager.setCurrentItem(index, true);
}
});
viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {
@Override
public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
}
@Override
public void onPageSelected(int position) {
viewPager.setCurrentItem(position, false);
tabLayoutView.setSelectStyle(position);
}
@Override
public void onPageScrollStateChanged(int state) {
}
});
}
private void initFragments()
{
List fragmentPages = new ArrayList<>();
fragmentPages.add(new FragmentPage());
fragmentPages.add(new FragmentPage());
fragmentPages.add(new FragmentPage());
fragmentPages.add(new FragmentPage());
fragmentPages.add(new FragmentPage());
ViewPagerAdapter viewPagerAdapter = new ViewPagerAdapter(getSupportFragmentManager(), fragmentPages);
viewPager.setAdapter(viewPagerAdapter);
}
/**
* 设置底部右上角数字，0不显示（默认），>0实现数字，-1显示小红点
*/
public void setDots()
{
tabLayoutView.setDotsCount(0, 1);
tabLayoutView.setDotsCount(1, 0);
tabLayoutView.setDotsCount(2, 3);
tabLayoutView.setDotsCount(3, 0);
tabLayoutView.setDotsCount(4, 5);
}
由于我们使用了ViewPager，所以我们要给其对应的Adapter
public class ViewPagerAdapter extends FragmentPagerAdapter {
private List fragments;
public ViewPagerAdapter(FragmentManager fm, List fragments) {
super(fm);
this.fragments = fragments;
}
@Override
public int getCount() {
return fragments.size();
}
@Override
public Fragment getItem(int position) {
return fragments.get(position);
}
}
最后附上用到的小红点的资源文件circle_dot_red_bg.xml
到此我们就大功告成了，上面写的比较详细，大家可以根据具体需求自取。最后附上效果图
231.png