2929 */
3030@ SuppressWarnings ({"unused" , "UnusedReturnValue" })
3131public class TitleBar extends FrameLayout
32- implements View .OnClickListener ,
33- View .OnLayoutChangeListener {
32+ implements View .OnClickListener {
3433
3534 private static final String LOG_TAG = "TitleBar" ;
3635
@@ -275,7 +274,8 @@ public TitleBar(Context context, AttributeSet attrs, int defStyleAttr) {
275274 addView (mRightView , 2 );
276275 addView (mLineView , 3 );
277276
278- addOnLayoutChangeListener (this );
277+ addOnLayoutChangeListener (mConstraintChildViewWidthListener );
278+ addOnLayoutChangeListener (mLimitChildViewStatusListener );
279279
280280 // 如果当前是布局预览模式
281281 if (isInEditMode ()) {
@@ -291,56 +291,6 @@ public TitleBar(Context context, AttributeSet attrs, int defStyleAttr) {
291291 }
292292 }
293293
294- /**
295- * {@link View.OnLayoutChangeListener}
296- */
297-
298- @ Override
299- public void onLayoutChange (View v , int left , int top , int right , int bottom , int oldLeft , int oldTop , int oldRight , int oldBottom ) {
300- // 先移除当前的监听，因为 TextView.setMaxWidth 方法会重新触发监听
301- removeOnLayoutChangeListener (this );
302-
303- // 标题栏子 View 最大宽度限制算法
304- post (() -> {
305- // 这里要延迟执行，否则会导致子 View.getWidth 的时候为零
306- int barWidth = right - left ;
307- int sideWidth = Math .max (mLeftView .getWidth (), mRightView .getWidth ());
308- int maxWidth = sideWidth * 2 + mTitleView .getWidth ();
309- // 算出来子 View 的宽大于标题栏的宽度
310- if (maxWidth >= barWidth ) {
311- // 判断是左右项太长还是标题项太长
312- if (sideWidth > barWidth / 3 ) {
313- // 如果是左右项太长，那么按照比例进行划分
314- TitleBarSupport .setMaxWidth (mLeftView , barWidth / 4 );
315- TitleBarSupport .setMaxWidth (mTitleView , barWidth / 2 );
316- TitleBarSupport .setMaxWidth (mRightView , barWidth / 4 );
317- } else {
318- // 如果是标题项太长，那么就进行动态计算
319- TitleBarSupport .setMaxWidth (mLeftView , sideWidth );
320- TitleBarSupport .setMaxWidth (mTitleView , barWidth - sideWidth * 2 );
321- TitleBarSupport .setMaxWidth (mRightView , sideWidth );
322- }
323- } else {
324- // 不限制子 View 的最大宽度
325- TitleBarSupport .setMaxWidth (mLeftView , Integer .MAX_VALUE );
326- TitleBarSupport .setMaxWidth (mTitleView , Integer .MAX_VALUE );
327- TitleBarSupport .setMaxWidth (mRightView , Integer .MAX_VALUE );
328- }
329-
330- // 解决在外部触摸时触发点击效果的问题
331- mLeftView .setClickable (true );
332- mTitleView .setClickable (true );
333- mRightView .setClickable (true );
334- // TextView 里面必须有东西才能被点击
335- mLeftView .setEnabled (TitleBarSupport .isContainContent (mLeftView ));
336- mTitleView .setEnabled (TitleBarSupport .isContainContent (mTitleView ));
337- mRightView .setEnabled (TitleBarSupport .isContainContent (mRightView ));
338-
339- // 这里再次监听需要延迟，否则会导致递归的情况发生
340- addOnLayoutChangeListener (TitleBar .this );
341- });
342- }
343-
344294 /**
345295 * {@link View.OnClickListener}
346296 */
@@ -701,7 +651,7 @@ public TitleBar setRightIconTint(int color) {
701651 }
702652
703653 /**
704- * 清楚标题的图标着色器
654+ * 清除标题的图标着色器
705655 */
706656 public TitleBar clearTitleIconTint () {
707657 mTitleIconTint = TitleBarSupport .NO_COLOR ;
@@ -710,7 +660,7 @@ public TitleBar clearTitleIconTint() {
710660 }
711661
712662 /**
713- * 清楚左标题的图标着色器
663+ * 清除左标题的图标着色器
714664 */
715665 public TitleBar clearLeftIconTint () {
716666 mLeftIconTint = TitleBarSupport .NO_COLOR ;
@@ -719,7 +669,7 @@ public TitleBar clearLeftIconTint() {
719669 }
720670
721671 /**
722- * 清楚右标题的图标着色器
672+ * 清除右标题的图标着色器
723673 */
724674 public TitleBar clearRightIconTint () {
725675 mRightIconTint = TitleBarSupport .NO_COLOR ;
@@ -930,4 +880,80 @@ public ITitleBarStyle getCurrentStyle() {
930880 public static void setDefaultStyle (ITitleBarStyle style ) {
931881 sGlobalStyle = style ;
932882 }
883+
884+ private final View .OnLayoutChangeListener mConstraintChildViewWidthListener = new OnLayoutChangeListener () {
885+
886+ @ Override
887+ public void onLayoutChange (View v , int left , int top , int right , int bottom , int oldLeft , int oldTop , int oldRight , int oldBottom ) {
888+ // 暂时先移除当前的监听，因为 TextView.setMaxWidth 方法会重新触发监听
889+ removeOnLayoutChangeListener (this );
890+
891+ // 标题栏子 View 最大宽度限制算法
892+ post (() -> {
893+ // 这里要延迟执行，否则会导致子 View.getWidth 的时候为零
894+ int titleBarWidth = right - left ;
895+ int leftViewWidth = mLeftView .getWidth ();
896+ int centerViewWidth = mTitleView .getWidth ();
897+ int rightViewWidth = mRightView .getWidth ();
898+
899+ int maxEdgeWidth = Math .max (leftViewWidth , rightViewWidth );
900+ int calculateTotalWidth = maxEdgeWidth * 2 + centerViewWidth ;
901+ // 算出来子 View 的宽大于标题栏的宽度
902+ if (calculateTotalWidth >= titleBarWidth ) {
903+ // 判断是左右项太长还是标题项太长
904+ if (maxEdgeWidth > titleBarWidth / 3 ) {
905+ // 如果是左右项太长，那么按照比例进行划分
906+ TitleBarSupport .setMaxWidth (mLeftView , titleBarWidth / 4 );
907+ TitleBarSupport .setMaxWidth (mTitleView , titleBarWidth / 2 );
908+ TitleBarSupport .setMaxWidth (mRightView , titleBarWidth / 4 );
909+ } else {
910+ // 如果是标题项太长，那么就进行动态计算
911+ TitleBarSupport .setMaxWidth (mLeftView , maxEdgeWidth );
912+ TitleBarSupport .setMaxWidth (mTitleView , titleBarWidth - maxEdgeWidth * 2 );
913+ TitleBarSupport .setMaxWidth (mRightView , maxEdgeWidth );
914+ }
915+ } else {
916+ // 不限制子 View 的最大宽度
917+ TitleBarSupport .setMaxWidth (mLeftView , Integer .MAX_VALUE );
918+ TitleBarSupport .setMaxWidth (mTitleView , Integer .MAX_VALUE );
919+ TitleBarSupport .setMaxWidth (mRightView , Integer .MAX_VALUE );
920+ }
921+
922+ removeCallbacks (mAddOnLayoutChangeListenerRunnable );
923+ // 这里再次监听需要延迟，否则会导致递归的情况发生
924+ post (mAddOnLayoutChangeListenerRunnable );
925+ });
926+ }
927+ };
928+
929+ @ SuppressWarnings ("all" )
930+ private final View .OnLayoutChangeListener mLimitChildViewStatusListener = new OnLayoutChangeListener () {
931+
932+ @ Override
933+ public void onLayoutChange (View v , int left , int top , int right , int bottom , int oldLeft , int oldTop , int oldRight , int oldBottom ) {
934+ // 解决在外部触摸时触发点击效果的问题
935+ if (!mLeftView .isClickable ()) {
936+ mLeftView .setClickable (true );
937+ }
938+ if (!mTitleView .isClickable ()) {
939+ mTitleView .setClickable (true );
940+ }
941+ if (!mRightView .isClickable ()) {
942+ mRightView .setClickable (true );
943+ }
944+
945+ // TextView 里面必须有东西才能被点击
946+ if (!mLeftView .isEnabled ()) {
947+ mLeftView .setEnabled (TitleBarSupport .isContainContent (mLeftView ));
948+ }
949+ if (!mTitleView .isEnabled ()) {
950+ mTitleView .setEnabled (TitleBarSupport .isContainContent (mTitleView ));
951+ }
952+ if (!mRightView .isEnabled ()) {
953+ mRightView .setEnabled (TitleBarSupport .isContainContent (mRightView ));
954+ }
955+ }
956+ };
957+
958+ private final Runnable mAddOnLayoutChangeListenerRunnable = () -> addOnLayoutChangeListener (mConstraintChildViewWidthListener );
933959}
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