Question

我的应用的屏幕截图：

我想以编程方式将蓝色下划线更改为白色，即使用不使用xml样式的java代码。任何人都可以建议请该怎么做？

这是我的java代码。我可以更改标签背景。

public class MainActivity extends FragmentActivity implements
        ActionBar.TabListener {

    private ViewPager viewPager;
    private TabsPagerAdapter mAdapter;
    private ActionBar actionBar;


    // Tab titles
    private String[] tabs = { "Music", "Video"};

    @SuppressWarnings("deprecation")
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // Initilization
        viewPager = (ViewPager) findViewById(R.id.pager);
        actionBar = getActionBar();
        mAdapter = new TabsPagerAdapter(getSupportFragmentManager());

        viewPager.setAdapter(mAdapter);
        //actionBar.setHomeButtonEnabled(false);
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);
        actionBar.setBackgroundDrawable(new ColorDrawable(Color.parseColor("#DF0174")));
        actionBar.setStackedBackgroundDrawable(new ColorDrawable(Color.parseColor("#DF3A01")));//to change the tab colors


        // Adding Tabs
        for (String tab_name : tabs) {
            actionBar.addTab(actionBar.newTab().setText(tab_name)
                    .setTabListener(this));
        }


        /**
         * on swiping the viewpager make respective tab selected
         * */
        viewPager.setOnPageChangeListener(new ViewPager.OnPageChangeListener() {

            @Override
            public void onPageSelected(int position) {
                // on changing the page
                // make respected tab selected
                actionBar.setSelectedNavigationItem(position);

            }

            @Override
            public void onPageScrolled(int arg0, float arg1, int arg2) {
            }

            @Override
            public void onPageScrollStateChanged(int arg0) {
            }
        });
    }

    @Override
    public void onTabReselected(Tab tab, FragmentTransaction ft) {
    }

    @Override
    public void onTabSelected(Tab tab, FragmentTransaction ft) {
        // on tab selected
        // show respected fragment view
        viewPager.setCurrentItem(tab.getPosition());
    }

    @Override
    public void onTabUnselected(Tab tab, FragmentTransaction ft) {
    }

}

Answer 1

只需使用过滤器即可这将适用于不透明的区域

tabHost.getTabWidget().getChildAt(tabHost.getCurrentTab()).getBackground().setColorFilter(Color.BLUE, PorterDuff.Mode.MULTIPLY);

一行代码 - 无需更改状态

Answer 2

只需将此属性添加到xml文件中的TabLayout中即可：

app:tabIndicatorColor="@color/yourColor"

更改应用的标签选择器颜色（标签下划线）

2 个答案: