将Tab栏居间的方法_Android

将Tab栏居中的方法

找到Android SlidingTabLayout源代码，在Android SlidingTabLayout源代码中有一个方法：
private void populateTabStrip();

 1 private void populateTabStrip() { 2         final PagerAdapter adapter = mViewPager.getAdapter(); 3         final View.OnClickListener tabClickListener = new TabClickListener(); 4  5         for (int i = 0; i < adapter.getCount(); i++) { 6             View tabView = null; 7             TextView tabTitleView = null; 8  9             if (mTabViewLayoutId != 0) {10                 // If there is a custom tab view layout id set, try and inflate11                 // it12                 tabView = LayoutInflater.from(getContext()).inflate(mTabViewLayoutId, mTabStrip, false);13                 tabTitleView = (TextView) tabView.findViewById(mTabViewTextViewId);14             }15 16             if (tabView == null) {17                 tabView = createDefaultTabView(getContext());18             }19 20             if (tabTitleView == null && TextView.class.isInstance(tabView)) {21                 tabTitleView = (TextView) tabView;22             }23 24             tabTitleView.setText(adapter.getPageTitle(i));25             tabView.setOnClickListener(tabClickListener);26             27             mTabStrip.addView(tabView);28         }29     }

这是谷歌官方实现的Android SlidingTabLayout添加底部选项卡Tab的代码，如果为了实现前文所述的将Tab均分水平位置空间，则需要修改此方法，在此方法中添加如下代码：

1 LinearLayout.LayoutParams layoutParams= new LinearLayout.LayoutParams(0, LayoutParams.WRAP_CONTENT, 1.0f);2             tabView.setLayoutParams(layoutParams);

这两段代码将tab view水平均分放置。

最终将private void populateTabStrip()改进成这样：

 1 private void populateTabStrip() { 2         final PagerAdapter adapter = mViewPager.getAdapter(); 3         final View.OnClickListener tabClickListener = new TabClickListener(); 4  5         for (int i = 0; i < adapter.getCount(); i++) { 6             View tabView = null; 7             TextView tabTitleView = null; 8  9             if (mTabViewLayoutId != 0) {10                 // If there is a custom tab view layout id set, try and inflate11                 // it12                 tabView = LayoutInflater.from(getContext()).inflate(mTabViewLayoutId, mTabStrip, false);13                 tabTitleView = (TextView) tabView.findViewById(mTabViewTextViewId);14             }15 16             if (tabView == null) {17                 tabView = createDefaultTabView(getContext());18             }19 20             if (tabTitleView == null && TextView.class.isInstance(tabView)) {21                 tabTitleView = (TextView) tabView;22             }23 24             tabTitleView.setText(adapter.getPageTitle(i));25             tabView.setOnClickListener(tabClickListener);26 27             //添加28             LinearLayout.LayoutParams layoutParams= new LinearLayout.LayoutParams(0, LayoutParams.WRAP_CONTENT, 1.0f);29             tabView.setLayoutParams(layoutParams);30             //添加31             32             mTabStrip.addView(tabView);33         }34     }