/**
* 标签控件，下方带有滑动块
*/
public class TabsView extends HorizontalScrollView {
private LinearLayout.LayoutParams defaultTabLayoutParams;
private LinearLayout.LayoutParams expandedTabLayoutParams;
private static final int[] ATTRS =
new int[]{
android.R.attr.textSize,
android.R.attr.textColor
};
private LinearLayout tabsContainer;
private Paint rectPaint;
private Paint dividerPaint;
private String[] tabs;
private int tabCount;
private boolean shouldExpand =
true;
private int scrollOffset =
52;
private int indicatorHeight =
2;
private int underlineHeight =
2;
private int dividerPadding =
12;
private int tabPadding =
24;
private int dividerWidth =
1;
private int currentPosition =
0;
private float currentPositionOffset =
0f;
private int lastScrollX =
0;
private OnRefreshListener listener ;
private int selectedTabTextColor =
0xFF212120;
private int tabBackgroundResId = R.drawable.background_tab;
private Typeface tabTypeface =
null;
private int tabTypefaceStyle = Typeface.NORMAL;
private int tabTextSize =
15;
private int tabTextColor =
0xFF999999;
private int indicatorColor =
0xFF781378;
private int underlineColor =
0x1A000000;
private int dividerColor =
0x00000000;
private int intervalWidth =
30;
public TabsView(Context context) {
this(context,
null);
}
public TabsView(Context context, AttributeSet attrs) {
this(context, attrs,
0);
}
public TabsView(Context context, AttributeSet attrs,
int defStyleAttr) {
super(context, attrs, defStyleAttr);
setFillViewport(
true);
setWillNotDraw(
false);
tabsContainer =
new LinearLayout(context);
tabsContainer.setOrientation(LinearLayout.HORIZONTAL);
tabsContainer.setLayoutParams(
new LayoutParams(LayoutParams.MATCH_PARENT, LayoutParams.MATCH_PARENT));
addView(tabsContainer);
DisplayMetrics dm = getResources().getDisplayMetrics();
scrollOffset = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, scrollOffset, dm);
indicatorHeight = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, indicatorHeight, dm);
underlineHeight = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, underlineHeight, dm);
dividerPadding = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerPadding, dm);
tabPadding = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, tabPadding, dm);
dividerWidth = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, dividerWidth, dm);
tabTextSize = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_SP, tabTextSize, dm);
intervalWidth = (
int) TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, intervalWidth, dm);
TypedArray a = context.obtainStyledAttributes(attrs, ATTRS);
tabTextSize = a.getDimensionPixelSize(
0, tabTextSize);
tabTextColor = a.getColor(
1, tabTextColor);
a.recycle();
a = context.obtainStyledAttributes(attrs, R.styleable.PagerSlidingTabStrip);
indicatorColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsIndicatorColor, indicatorColor);
underlineColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsUnderlineColor, underlineColor);
dividerColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsDividerColor, dividerColor);
indicatorHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsIndicatorHeight, indicatorHeight);
underlineHeight = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsUnderlineHeight, underlineHeight);
dividerPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsDividerPadding, dividerPadding);
tabPadding = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsTabPaddingLeftRight, tabPadding);
tabBackgroundResId = a.getResourceId(R.styleable.PagerSlidingTabStrip_pstsTabBackground, tabBackgroundResId);
shouldExpand = a.getBoolean(R.styleable.PagerSlidingTabStrip_pstsShouldExpand, shouldExpand);
scrollOffset = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_pstsScrollOffset, scrollOffset);
selectedTabTextColor = a.getColor(R.styleable.PagerSlidingTabStrip_pstsSelectedTabTextColor, selectedTabTextColor);
intervalWidth = a.getDimensionPixelSize(R.styleable.PagerSlidingTabStrip_intervalWidth, intervalWidth);
a.recycle();
rectPaint =
new Paint();
rectPaint.setAntiAlias(
true);
rectPaint.setStyle(Paint.Style.FILL);
dividerPaint =
new Paint();
dividerPaint.setAntiAlias(
true);
dividerPaint.setStrokeWidth(dividerWidth);
defaultTabLayoutParams =
new LinearLayout.LayoutParams(LayoutParams.WRAP_CONTENT, LayoutParams.MATCH_PARENT);
expandedTabLayoutParams =
new LinearLayout.LayoutParams(
0, LayoutParams.MATCH_PARENT,
1.0f);
}
public void setTabs(String[] tabs) {
this.tabs = tabs;
notifyDataSetChanged();
}
private void notifyDataSetChanged() {
tabsContainer.removeAllViews();
tabCount = tabs.length;
for (
int i =
0; i < tabCount; i++) {
addTextTab(i, tabs[i]);
}
updateTabStyles();
getViewTreeObserver().addOnGlobalLayoutListener(
new ViewTreeObserver.OnGlobalLayoutListener() {
@SuppressWarnings(
"deprecation")
@SuppressLint(
"NewApi")
@Override
public void onGlobalLayout() {
if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
getViewTreeObserver().removeGlobalOnLayoutListener(
this);
}
else {
getViewTreeObserver().removeOnGlobalLayoutListener(
this);
}
currentPosition = getCurrentItem();
scrollToChild(currentPosition,
0);
}
});
}
private void scrollToChild(
int position,
int offset) {
if (tabCount ==
0) {
return;
}
int newScrollX = tabsContainer.getChildAt(position).getLeft() + offset;
if (position >
0 || offset >
0) {
newScrollX -= scrollOffset;
}
if (newScrollX != lastScrollX) {
lastScrollX = newScrollX;
scrollTo(newScrollX,
0);
}
}
private int getCurrentItem() {
return 0;
}
private void updateTabStyles() {
for (
int i =
0; i < tabCount; i++) {
View v = tabsContainer.getChildAt(i);
v.setBackgroundResource(tabBackgroundResId);
if (v
instanceof TextView) {
TextView tab = (TextView) v;
tab.setTypeface(tabTypeface, tabTypefaceStyle);
tab.setTextSize(TypedValue.COMPLEX_UNIT_PX, tabTextSize);
if (i == currentPosition) {
tab.setTextColor(selectedTabTextColor);
}
else {
tab.setTextColor(tabTextColor);
}
}
}
}
private void addTextTab(
final int position, String title) {
TextView tab =
new TextView(getContext());
tab.setText(title);
tab.setGravity(Gravity.CENTER);
tab.setSingleLine();
addTab(position, tab);
}
private void addTab(
final int position, View tab) {
tab.setFocusable(
true);
tab.setOnClickListener(
new OnClickListener() {
@Override
public void onClick(View v) {
setCurrentItem(position);
updateTabStyles();
invalidate();
if(listener !=
null){
listener.onRefresh(position);
}
}
});
tab.setPadding(tabPadding,
0, tabPadding,
0);
tabsContainer.addView(tab, position, shouldExpand ? expandedTabLayoutParams : defaultTabLayoutParams);
}
@Override
protected void onDraw(Canvas canvas) {
super.onDraw(canvas);
if (isInEditMode() || tabCount ==
0) {
return;
}
final int height = getHeight();
rectPaint.setColor(indicatorColor);
View currentTab = tabsContainer.getChildAt(currentPosition);
float lineLeft = currentTab.getLeft() + intervalWidth;
float lineRight = currentTab.getRight() - intervalWidth;
if (currentPositionOffset >
0f && currentPosition < tabCount -
1) {
View nextTab = tabsContainer.getChildAt(currentPosition +
1);
final float nextTabLeft = nextTab.getLeft() + intervalWidth;
final float nextTabRight = nextTab.getRight() - intervalWidth;
lineLeft = (currentPositionOffset * nextTabLeft + (
1f - currentPositionOffset) * lineLeft);
lineRight = (currentPositionOffset * nextTabRight + (
1f - currentPositionOffset) * lineRight);
}
canvas.drawRect(lineLeft, height - indicatorHeight, lineRight, height, rectPaint);
rectPaint.setColor(underlineColor);
canvas.drawRect(
0, height - underlineHeight, tabsContainer.getWidth(), height, rectPaint);
dividerPaint.setColor(dividerColor);
for (
int i =
0; i < tabCount -
1; i++) {
View tab = tabsContainer.getChildAt(i);
canvas.drawLine(tab.getRight(), dividerPadding, tab.getRight(), height - dividerPadding, dividerPaint);
}
}
private void setCurrentItem(
int currentPosition) {
this.currentPosition = currentPosition;
}
public interface OnRefreshListener{
void onRefresh(
int position);
}
public void setOnRefreshListener(OnRefreshListener listener){
this.listener = listener;
}
}
attrs.xml:文件夹下
<declare-styleable name="PagerSlidingTabStrip">
<attr name="pstsIndicatorColor" format="color" />
<attr name="pstsUnderlineColor" format="color" />
<attr name="pstsDividerColor" format="color" />
<attr name="pstsIndicatorHeight" format="dimension" />
<attr name="pstsUnderlineHeight" format="dimension" />
<attr name="pstsDividerPadding" format="dimension" />
<attr name="pstsTabPaddingLeftRight" format="dimension" />
<attr name="pstsScrollOffset" format="dimension" />
<attr name="pstsTabBackground" format="reference" />
<attr name="pstsShouldExpand" format="boolean" />
<attr name="pstsTextAllCaps" format="boolean" />
<attr name="pstsSelectedTabTextColor" format="color" />
<attr name="textSelectedSize" format="dimension" />
<attr name="intervalWidth" format="dimension" />
</declare-styleable>
可以自定义设置属性
@BindView(R.id.mtabs_fragment) TabsView tabs; private String[] titles; titles = getResources().getStringArray(R.array.artist_tabs_array); tabs.setTabs(titles); tabs.setOnRefreshListener(this);
@Override public void onRefresh(int position) { artistListview.smoothScrollByOffset(position); //此处做点击处理即可 }
