如何使用 Android 中的代码使用 TabLayout 更改选定的选项卡文本颜色？

Question

我正在使用 android.support.widget.TabLayout 创建一个选项卡视图，我想通过代码（而不是通过 xml 或样式）更改所选选项卡的文本颜色。我该怎么做？

Answer 1

如果您正在使用设计支持库，请将此代码添加到您的 选项卡 activity。

tabLayout.setSelectedTabIndicatorColor(Color.parseColor("#FF0000"));
tabLayout.setSelectedTabIndicatorHeight((int) (5 * getResources().getDisplayMetrics().density));
tabLayout.setTabTextColors(Color.parseColor("#727272"), Color.parseColor("#ffffff"));

这将设置 选项卡文本颜色 以及选项卡中的选项卡指示器颜色 activity。

Answer 2

复制这两个文件：

SlidingTabLayout.java :

包 com.some.package;

import android.content.Context;
import android.graphics.Color;
import android.graphics.Typeface;
import android.os.Build;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.util.AttributeSet;
import android.util.SparseArray;
import android.util.TypedValue;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.widget.HorizontalScrollView;
import android.widget.LinearLayout;
import android.widget.TextView;


/**
 * To be used with ViewPager to provide a tab indicator component which give constant feedback as to
 * the user's scroll progress.
 * <p>
 * To use the component, simply add it to your view hierarchy. Then in your
 * {@link android.app.Activity} or {@link android.support.v4.app.Fragment} call
 * {@link #setViewPager(ViewPager)} providing it the ViewPager this layout is being used for.
 * <p>
 * The colors can be customized in two ways. The first and simplest is to provide an array of colors
 * via {@link #setSelectedIndicatorColors(int...)}. The
 * alternative is via the {@link TabColorizer} interface which provides you complete control over
 * which color is used for any individual position.
 * <p>
 * The views used as tabs can be customized by calling {@link #setCustomTabView(int, int)},
 * providing the layout ID of your custom layout.
 */
public class SlidingTabLayout extends HorizontalScrollView {
    /**
     * Allows complete control over the colors drawn in the tab layout. Set with
     * {@link #setCustomTabColorizer(TabColorizer)}.
     */
    public interface TabColorizer {

        /**
         * @return return the color of the indicator used when {@code position} is selected.
         */
        int getIndicatorColor(int position);

    }

    private static final int TITLE_OFFSET_DIPS = 24;
    private static final int TAB_VIEW_PADDING_DIPS = 16;
    private static final int TAB_VIEW_SIDE_PADDING_DIPS = 18;

    private static final int TAB_VIEW_TEXT_SIZE_SP = 12;

    private int mTitleOffset;

    private int mTabViewLayoutId;
    private int mTabViewTextViewId;
    private boolean mDistributeEvenly;

    private ViewPager mViewPager;
    private SparseArray<String> mContentDescriptions = new SparseArray<String>();
    private ViewPager.OnPageChangeListener mViewPagerPageChangeListener;

    private final SlidingTabStrip mTabStrip;
    Context mContext;

    public SlidingTabLayout(Context context) {
        this(context, null);
        mContext = context;
    }

    public SlidingTabLayout(Context context, AttributeSet attrs) {
        this(context, attrs, 0);
        mContext = context;
    }

    public SlidingTabLayout(Context context, AttributeSet attrs, int defStyle) {
        super(context, attrs, defStyle);

        // Disable the Scroll Bar
        setHorizontalScrollBarEnabled(false);
        // Make sure that the Tab Strips fills this View
        setFillViewport(true);

        mTitleOffset = (int) (TITLE_OFFSET_DIPS * getResources().getDisplayMetrics().density);

        mTabStrip = new SlidingTabStrip(context);
        addView(mTabStrip, LayoutParams.MATCH_PARENT, LayoutParams.WRAP_CONTENT);
        mContext = context;
    }

    /**
     * Set the custom {@link TabColorizer} to be used.
     *
     * If you only require simple custmisation then you can use
     * {@link #setSelectedIndicatorColors(int...)} to achieve
     * similar effects.
     */
    public void setCustomTabColorizer(TabColorizer tabColorizer) {
        mTabStrip.setCustomTabColorizer(tabColorizer);
    }

    public void setDistributeEvenly(boolean distributeEvenly) {
        mDistributeEvenly = distributeEvenly;
    }

    /**
     * Sets the colors to be used for indicating the selected tab. These colors are treated as a
     * circular array. Providing one color will mean that all tabs are indicated with the same color.
     */
    public void setSelectedIndicatorColors(int... colors) {
        mTabStrip.setSelectedIndicatorColors(colors);
    }

    /**
     * Set the {@link ViewPager.OnPageChangeListener}. When using {@link SlidingTabLayout} you are
     * required to set any {@link ViewPager.OnPageChangeListener} through this method. This is so
     * that the layout can update it's scroll position correctly.
     *
     * @see ViewPager#setOnPageChangeListener(ViewPager.OnPageChangeListener)
     */
    public void setOnPageChangeListener(ViewPager.OnPageChangeListener listener) {
        mViewPagerPageChangeListener = listener;
    }

    /**
     * Set the custom layout to be inflated for the tab views.
     *
     * @param layoutResId Layout id to be inflated
     * @param textViewId id of the {@link TextView} in the inflated view
     */
    public void setCustomTabView(int layoutResId, int textViewId) {
        mTabViewLayoutId = layoutResId;
        mTabViewTextViewId = textViewId;
    }

    /**
     * Sets the associated view pager. Note that the assumption here is that the pager content
     * (number of tabs and tab titles) does not change after this call has been made.
     */
    public void setViewPager(ViewPager viewPager) {
        mTabStrip.removeAllViews();

        mViewPager = viewPager;
        if (viewPager != null) {

            InternalViewPagerListener listener = new InternalViewPagerListener();
            viewPager.setOnPageChangeListener(listener);
            populateTabStrip();
            listener.onPageSelected(0);
        }
    }

    /**
     * Create a default view to be used for tabs. This is called if a custom tab view is not set via
     * {@link #setCustomTabView(int, int)}.
     */
    protected TextView createDefaultTabView(Context context) {
        Typeface typeFace;

        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.ICE_CREAM_SANDWICH) {
            typeFace = //set your typeface here
        }else{
            typeFace = //set your typeface here
        }

        TextView textView= new TextView(context);

        textView.setTextColor(context.getResources().getColor(R.color.inactive_tab_color));
        textView.setGravity(Gravity.CENTER);
        textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP);
        textView.setTypeface(typeFace);
        textView.setLayoutParams(new LinearLayout.LayoutParams(
                LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.HORIZONTAL));

        TypedValue outValue = new TypedValue();
        getContext().getTheme().resolveAttribute(android.R.attr.selectableItemBackground,
                outValue, true);
        textView.setBackgroundResource(outValue.resourceId);
        textView.setAllCaps(true);

        int padding = (int) (TAB_VIEW_PADDING_DIPS * getResources().getDisplayMetrics().density);
        int sidePadding = (int) (TAB_VIEW_SIDE_PADDING_DIPS * getResources().getDisplayMetrics().density);
        textView.setPadding(sidePadding, padding, sidePadding, padding);

        return textView;
    }

    private void populateTabStrip() {
        final PagerAdapter adapter = mViewPager.getAdapter();
        final View.OnClickListener tabClickListener = new TabClickListener();

        for (int i = 0; i < adapter.getCount(); i++) {
            View tabView = null;
            TextView tabTitleView = null;

            if (mTabViewLayoutId != 0) {
                // If there is a custom tab view layout id set, try and inflate it
                tabView = LayoutInflater.from(getContext()).inflate(mTabViewLayoutId, mTabStrip,
                        false);
                tabTitleView = (TextView) tabView.findViewById(mTabViewTextViewId);
            }

            if (tabView == null) {
                tabView = createDefaultTabView(getContext());
            }

            if (tabTitleView == null && TextView.class.isInstance(tabView)) {
                tabTitleView = (TextView) tabView;
            }

            if (mDistributeEvenly) {
                LinearLayout.LayoutParams lp = (LinearLayout.LayoutParams) tabView.getLayoutParams();
                lp.width = 0;
                lp.weight = 1;
            }

            tabTitleView.setText(adapter.getPageTitle(i));
            tabView.setOnClickListener(tabClickListener);
            String desc = mContentDescriptions.get(i, null);
            if (desc != null) {
                tabView.setContentDescription(desc);
            }

            mTabStrip.addView(tabView);
            if (i == mViewPager.getCurrentItem()) {
                tabView.setSelected(true);
            }
        }
    }

    public void setContentDescription(int i, String desc) {
        mContentDescriptions.put(i, desc);
    }

    @Override
    protected void onAttachedToWindow() {
        super.onAttachedToWindow();

        if (mViewPager != null) {
            scrollToTab(mViewPager.getCurrentItem(), 0);
        }
    }

    private void scrollToTab(int tabIndex, int positionOffset) {
        final int tabStripChildCount = mTabStrip.getChildCount();
        if (tabStripChildCount == 0 || tabIndex < 0 || tabIndex >= tabStripChildCount) {
            return;
        }

        View selectedChild = mTabStrip.getChildAt(tabIndex);
        if (selectedChild != null) {
            int targetScrollX = selectedChild.getLeft() + positionOffset;

            if (tabIndex > 0 || positionOffset > 0) {
                // If we're not at the first child and are mid-scroll, make sure we obey the offset
                targetScrollX -= mTitleOffset;
            }

            scrollTo(targetScrollX, 0);
        }
    }

    private class InternalViewPagerListener implements ViewPager.OnPageChangeListener {
        private int mScrollState;

        @Override
        public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) {
            int tabStripChildCount = mTabStrip.getChildCount();
            if ((tabStripChildCount == 0) || (position < 0) || (position >= tabStripChildCount)) {
                return;
            }

            mTabStrip.onViewPagerPageChanged(position, positionOffset);

            View selectedTitle = mTabStrip.getChildAt(position);

            int extraOffset = (selectedTitle != null)
                    ? (int) (positionOffset * selectedTitle.getWidth())
                    : 0;
            scrollToTab(position, extraOffset);

            if (mViewPagerPageChangeListener != null) {
                mViewPagerPageChangeListener.onPageScrolled(position, positionOffset,
                        positionOffsetPixels);
            }



        }

        @Override
        public void onPageScrollStateChanged(int state) {
            mScrollState = state;

            if (mViewPagerPageChangeListener != null) {
                mViewPagerPageChangeListener.onPageScrollStateChanged(state);
            }
        }

        @Override
        public void onPageSelected(int position) {

            if (mScrollState == ViewPager.SCROLL_STATE_IDLE) {
                mTabStrip.onViewPagerPageChanged(position, 0f);
                scrollToTab(position, 0);
            }
            for (int i = 0; i < mTabStrip.getChildCount(); i++) {
                mTabStrip.getChildAt(i).setSelected(position == i);
            }
            if (mViewPagerPageChangeListener != null) {
                mViewPagerPageChangeListener.onPageSelected(position);
            }

            View selectedTitle = mTabStrip.getChildAt(position);
            ((TextView) selectedTitle).setTextColor(Color.WHITE);

            int remainingTabs = mTabStrip.getChildCount() - position;
            for(int i=0 ;i< mTabStrip.getChildCount(); i++){
                if(i == position)
                    continue;

                View remainingTitles = mTabStrip.getChildAt(i);
                ((TextView) remainingTitles).setTextColor(mContext.getResources().getColor(R.color.inactive_tab_color));
            }

        }

    }

    private class TabClickListener implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            for (int i = 0; i < mTabStrip.getChildCount(); i++) {
                if (v == mTabStrip.getChildAt(i)) {
                    mViewPager.setCurrentItem(i);
                    return;
                }
            }
        }
    }

}

SlidingTabStrip.java :

包 com.some.package;

进口android.content.Context；导入 android.graphics.Canvas；导入 android.graphics.Color；导入 android.graphics.Paint；导入 android.util.AttributeSet；导入 android.util.TypedValue；导入 android.view.View；导入 android.widget.LinearLayout;

class SlidingTabStrip 扩展了 LinearLayout {

private static final int DEFAULT_BOTTOM_BORDER_THICKNESS_DIPS = 0;
private static final byte DEFAULT_BOTTOM_BORDER_COLOR_ALPHA = 0x26;
private static final int SELECTED_INDICATOR_THICKNESS_DIPS = 2;
private static final int DEFAULT_SELECTED_INDICATOR_COLOR = 0xFF33B5E5;

private final int mBottomBorderThickness;
private final Paint mBottomBorderPaint;

private final int mSelectedIndicatorThickness;
private final Paint mSelectedIndicatorPaint;

private int mSelectedPosition;
private float mSelectionOffset;

private SlidingTabLayout.TabColorizer mCustomTabColorizer;
private final SimpleTabColorizer mDefaultTabColorizer;

SlidingTabStrip(Context context) {
    this(context, null);
}

SlidingTabStrip(Context context, AttributeSet attrs) {
    super(context, attrs);
    setWillNotDraw(false);

    final float density = getResources().getDisplayMetrics().density;

    TypedValue outValue = new TypedValue();
    context.getTheme().resolveAttribute(android.R.attr.colorForeground, outValue, true);
    final int themeForegroundColor =  outValue.data;

    int defaultBottomBorderColor = setColorAlpha(themeForegroundColor,
            DEFAULT_BOTTOM_BORDER_COLOR_ALPHA);

    mDefaultTabColorizer = new SimpleTabColorizer();
    mDefaultTabColorizer.setIndicatorColors(DEFAULT_SELECTED_INDICATOR_COLOR);

    mBottomBorderThickness = (int) (DEFAULT_BOTTOM_BORDER_THICKNESS_DIPS * density);
    mBottomBorderPaint = new Paint();
    mBottomBorderPaint.setColor(defaultBottomBorderColor);

    mSelectedIndicatorThickness = (int) (SELECTED_INDICATOR_THICKNESS_DIPS * density);
    mSelectedIndicatorPaint = new Paint();
}

void setCustomTabColorizer(SlidingTabLayout.TabColorizer customTabColorizer) {
    mCustomTabColorizer = customTabColorizer;
    invalidate();
}

void setSelectedIndicatorColors(int... colors) {
    // Make sure that the custom colorizer is removed
    mCustomTabColorizer = null;
    mDefaultTabColorizer.setIndicatorColors(colors);
    invalidate();
}

void onViewPagerPageChanged(int position, float positionOffset) {
    mSelectedPosition = position;
    mSelectionOffset = positionOffset;
    invalidate();
}

@Override
protected void onDraw(Canvas canvas) {
    final int height = getHeight();
    final int childCount = getChildCount();
    final SlidingTabLayout.TabColorizer tabColorizer = mCustomTabColorizer != null
            ? mCustomTabColorizer
            : mDefaultTabColorizer;

    // Thick colored underline below the current selection
    if (childCount > 0) {
        View selectedTitle = getChildAt(mSelectedPosition);
        int left = selectedTitle.getLeft();
        int right = selectedTitle.getRight();
        int color = tabColorizer.getIndicatorColor(mSelectedPosition);

        if (mSelectionOffset > 0f && mSelectedPosition < (getChildCount() - 1)) {
            int nextColor = tabColorizer.getIndicatorColor(mSelectedPosition + 1);
            if (color != nextColor) {
                color = blendColors(nextColor, color, mSelectionOffset);
            }

            // Draw the selection partway between the tabs
            View nextTitle = getChildAt(mSelectedPosition + 1);
            left = (int) (mSelectionOffset * nextTitle.getLeft() +
                    (1.0f - mSelectionOffset) * left);
            right = (int) (mSelectionOffset * nextTitle.getRight() +
                    (1.0f - mSelectionOffset) * right);
        }

        mSelectedIndicatorPaint.setColor(color);

        canvas.drawRect(left, height - mSelectedIndicatorThickness, right,
                height, mSelectedIndicatorPaint);
    }

    // Thin underline along the entire bottom edge
    canvas.drawRect(0, height - mBottomBorderThickness, getWidth(), height, mBottomBorderPaint);

}

/**
 * Set the alpha value of the {@code color} to be the given {@code alpha} value.
 */
private static int setColorAlpha(int color, byte alpha) {
    return Color.argb(alpha, Color.red(color), Color.green(color), Color.blue(color));
}

/**
 * Blend {@code color1} and {@code color2} using the given ratio.
 *
 * @param ratio of which to blend. 1.0 will return {@code color1}, 0.5 will give an even blend,
 *              0.0 will return {@code color2}.
 */
private static int blendColors(int color1, int color2, float ratio) {
    final float inverseRation = 1f - ratio;
    float r = (Color.red(color1) * ratio) + (Color.red(color2) * inverseRation);
    float g = (Color.green(color1) * ratio) + (Color.green(color2) * inverseRation);
    float b = (Color.blue(color1) * ratio) + (Color.blue(color2) * inverseRation);
    return Color.rgb((int) r, (int) g, (int) b);
}

private static class SimpleTabColorizer implements SlidingTabLayout.TabColorizer {
    private int[] mIndicatorColors;

    @Override
    public final int getIndicatorColor(int position) {
        return mIndicatorColors[position % mIndicatorColors.length];
    }

    void setIndicatorColors(int... colors) {
        mIndicatorColors = colors;
    }
}

}

以上两个文件我都没有写过。我从官方 android 文档站点获取它。

现在在您的布局 xml 文件中获取小部件 SlidingTabLayout。

最后将此代码添加到您的 Activity/Fragment 中：

CONTENT = new String[] { "A", "B", "C", "D"};

mPager = (ViewPager) view.findViewById(R.id.pager);
SlidingTabsAdapter adapter =new SlidingTabsAdapter(getChildFragmentManager());

        mPager.setAdapter(adapter);

        mPager.setCurrentItem(0);

        slidingTabLayout = (SlidingTabLayout) view.findViewById(R.id.sliding_tabs);
        slidingTabLayout.setDistributeEvenly(true);
        slidingTabLayout.setSelectedIndicatorColors(getResources().getColor(someColorID));
        slidingTabLayout.setViewPager(mPager);

私有 class SlidingTabsAdapter 扩展了 FragmentPagerAdapter {

public SlidingTabsAdapter(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {

    Fragment fragment;
    Bundle b;

    switch (position){

        case 0:

            fragment = new FragmentA();

        break;

        case 1:

            fragment = new FragmentB();

        break;

        case 2:

            fragment = new FragmentC();

        break;

        case 3:

            fragment = new FragmentD();

        break;

        default:

            fragment = new FragmentZ();

    }

    return fragment;
}

@Override
public CharSequence getPageTitle(int position) {
    return CONTENT[position % CONTENT.length].toUpperCase();
}

@Override
public int getCount() {
    return CONTENT.length;
}

}

Answer 3

使用XML就是这么简单。只需在选项卡布局中添加以下 2 个属性即可。

app:tabSelectedTextColor="@color/color_primary_text"
app:tabTextColor="@color/color_secondary_text"

因此，您的代码将如下所示。

<android.support.design.widget.TabLayout
    android:id="@+id/tab_layout"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_alignParentBottom="true"
    android:layout_alignParentStart="true"
    android:layout_gravity="bottom"
    android:background="@color/button_background"
    android:fillViewport="true"
    app:tabBackground="@drawable/fixed_bottom_button"
    app:tabIndicatorColor="@color/color_primary_text"
    app:tabMode="fixed"
    app:tabSelectedTextColor="@color/color_primary_text"
    app:tabTextColor="@color/color_secondary_text" />

Answer 4

请查看以下答案

 tabLayout.addOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {
        @Override
        public void onTabSelected(TabLayout.Tab tab) {
            View view = tab.getCustomView();
            RelativeLayout relativeLayout = (RelativeLayout) view.findViewById(R.id.layout_background);
            relativeLayout.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.white));
            TypefacedTextView selectedText = (TypefacedTextView) view.findViewById(R.id.txt_tab_name);
            selectedText.setTextColor(ContextCompat.getColor(getActivity(), R.color.colorPrimary));

        }

        @Override
        public void onTabUnselected(TabLayout.Tab tab) {
            View view = tab.getCustomView();
            RelativeLayout relativeLayout = (RelativeLayout) view.findViewById(R.id.layout_background);
            relativeLayout.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.colorPrimary));
            TypefacedTextView selectedText = (TypefacedTextView) view.findViewById(R.id.txt_tab_name);
            selectedText.setTextColor(ContextCompat.getColor(getActivity(), R.color.white));
        }

        @Override
        public void onTabReselected(TabLayout.Tab tab) {

        }
    });

其中 tabLayout 是 TabLayout 的对象 Class

Answer 5

我知道这可能有点晚了，但这里有更简单的代码：

tabLayout.setTabTextColors(getResources().getColor(R.color.blue_200), getResources().getColor(R.color.white));

第一个值是默认文本颜色，第二个值是所选选项卡文本颜色。

Answer 6

tabLayout.setSelectedTabIndicatorColor(Color.parseColor("#FF0000"));
tabLayout.setSelectedTabIndicatorHeight((int) (5 * getResources().getDisplayMetrics().density));
tabLayout.setTabTextColors(Color.parseColor("#727272"), Color.parseColor("#ffffff"));

Answer 7

使用本机 android 代码，您可以更改多个选项卡背景和文本颜色

LinearLayout tabsContainer = (LinearLayout) tabLayout.getChildAt(0);
        for (int i = 0; i < tabLayout.getTabCount(); i++) {
            for (int j = 0; j <= selectedTab.size(); j++) {
                if (selectedTab.contains(section)) {
                    LinearLayout item = (LinearLayout) tabsContainer.getChildAt(section - 1);
                    TextView tv = (TextView) item.getChildAt(1);
                    item.setBackgroundColor(getResources().getColor(R.color.color00DF4C));
                    tv.setTextColor(getResources().getColor(R.color.colorWhite));
                }
            }
        }

Answer 8

最好用“com.google.android.material:material:1.0.0”更新库。然后使用下面的代码，

在XML属性中

<com.google.android.material.tabs.TabLayout
                    android:id="@+id/tab_layout"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:tabIndicatorColor="@color/white"
                    app:tabBackground="@color/colorAccent"
                    app:tabSelectedTextColor="@color/white"
                    app:tabTextColor="@color/white"
                    app:tabMode="scrollable" />

以编程方式在 Kotlin 中

(tab_layout as TabLayout).setBackgroundColor(ContextCompat.getColor(mContext, R.color.colorPrimary))
(tab_layout as TabLayout).setSelectedTabIndicatorColor(ContextCompat.getColor(mContext, R.color.white))
(tab_layout as TabLayout).setTabTextColors(ContextCompat.getColor(mContext, R.color.white),
                ContextCompat.getColor(mContext, R.color.white))

Answer 9

就写在xml

app:tabSelectedTextColor="@color/my_color"

为我工作

如何使用 Android 中的代码使用 TabLayout 更改选定的选项卡文本颜色？

How to change selected Tab Text color using TabLayout from code in Android?

android

android-tabs

android-tablayout