page - tablayout android example

¿Cómo cambiar el color del texto de la pestaña seleccionado usando TabLayout desde el código en Android?

Question

Estoy usando android.support.widget.TabLayout para hacer una vista de pestaña, y quiero cambiar el color del texto de las pestañas seleccionadas desde el código (no desde xml o con estilo). Cómo puedo hacer esto ?

Answer 1

Copie estos dos archivos:

1. SlidingTabLayout.java:

paquete 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;
}
}
}
}
}

2. SlidingTabStrip.java:

   paquete com.some.package;

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

   La clase SlidingTabStrip extiende 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;
   }
   }

   }

No he escrito estos dos archivos anteriores. Lo saqué del sitio oficial de documentación de Android.

Ahora tome el widget SlidingTabLayout en su archivo xml de diseño.

y finalmente agregue este código a su Actividad / Fragmento:

CONTENIDO = nueva cadena [] {"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);

La clase privada SlidingTabsAdapter extiende 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 2

Es tan simple usar XML. Solo agrega los siguientes 2 atributos en el diseño de tu pestaña.

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

Por lo tanto, su código se vería algo así.

<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 3

Por favor revisa la siguiente respuesta

 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) {
}
});

donde tabLayout es objeto de TabLayout Class

Answer 4

Sé que esto puede ser un poco tarde, pero aquí hay un código más simple:

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

el primer valor es el color de texto predeterminado, el segundo valor es el color del texto de la pestaña seleccionada.

Answer 5

Si está utilizando la biblioteca de soporte de diseño, agregue este código a su tabactividad

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

Esto establecerá el color del texto de la pestaña, así como el color del indicador de la pestaña en su tabactividad.

Answer 6

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