如何把圖標放在SlidingTab中？

Question

如何使用SlidingTabLayout將圖標放入我的選項卡中。我只是想將標題更改爲圖標。請幫助我如何做到這一點。

下面是代碼 ViewPagerAdapter.java

import android.support.v4.app.Fragment; 
import android.support.v4.app.FragmentManager; 
import android.support.v4.app.FragmentStatePagerAdapter; 


public class ViewPagerAdapter extends FragmentStatePagerAdapter { 

CharSequence Titles[]; // This will Store the Titles of the Tabs which are Going to be passed when ViewPagerAdapter is created 
int NumbOfTabs; // Store the number of tabs, this will also be passed when the ViewPagerAdapter is created 


// Build a Constructor and assign the passed Values to appropriate values in the class 
public ViewPagerAdapter(FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) { 
    super(fm); 

    this.Titles = mTitles; 
    this.NumbOfTabs = mNumbOfTabsumb; 

} 

//This method return the fragment for the every position in the View Pager 
@Override 
public Fragment getItem(int position) { 

    if(position == 0) // if the position is 0 we are returning the First tab 
    { 
     OrderTab ordertab = new OrderTab(); 
     return ordertab; 
    } 
    else if(position==1)  // As we are having 2 tabs if the position is now 0 it must be 1 so we are returning second tab 
    { 
     ViewOrderTab viewordertab = new ViewOrderTab(); 
     return viewordertab; 
    } 
    else 
    { 
     OrderStatus orderstatus = new OrderStatus(); 
     return orderstatus; 
    } 

} 

// This method return the titles for the Tabs in the Tab Strip 

@Override 
public CharSequence getPageTitle(int position) { 
    return Titles[position]; 
} 

// This method return the Number of tabs for the tabs Strip 

@Override 
public int getCount() { 
    return NumbOfTabs; 
} 


public static interface FirstShot 
{ 
    public void onFirstShot(); 
} 

} 

SlidingTabLayout.java

package com.example.work.mcoatorderingapp; 

import android.content.Context; 
import android.graphics.Typeface; 
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.view.ViewGroup; 
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_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; 

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

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

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); 
} 

/** 
* 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 OnPageChangeListener(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) { 
     viewPager.setOnPageChangeListener(new InternalViewPagerListener()); 
     populateTabStrip(); 
    } 
} 

/** 
* 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) { 
    TextView textView = new TextView(context); 
    textView.setGravity(Gravity.CENTER); 
    textView.setTextSize(TypedValue.COMPLEX_UNIT_SP, TAB_VIEW_TEXT_SIZE_SP); 
    textView.setTypeface(Typeface.DEFAULT_BOLD); 
    textView.setLayoutParams(new LinearLayout.LayoutParams(
      ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT)); 

    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); 
    textView.setPadding(padding, padding, padding, 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); 
     } 

     tabTitleView.setTextColor(getResources().getColorStateList(R.color.selector)); 
     tabTitleView.setTextSize(14); 
    } 
} 




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); 
     } 
    } 

} 

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; 
      } 
     } 
    } 
} 

} 

所述片段OrderTab.java相同的代碼與ViewOrderTab.java和OrderStatus.java

import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.support.v4.app.Fragment; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 


public class OrderStatus extends Fragment { 

    @Override 
    public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, @Nullable Bundle savedInstanceState) { 
     View v =inflater.inflate(R.layout.orderstatus_list,container,false); 
     return v; 
    } 
} 

MainActivity.java

EditText search; 
ProgressDialog pDialog; 
Toolbar toolbar; 
ViewPager pager; 
ViewPagerAdapter adapter; 
SlidingTabLayout tabs; 
CharSequence Titles[] = {"Order Product", "Cart", "Order Status"}; 
int Numboftabs = 3; 
String titlebar; 


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

    // Creating The Toolbar and setting it as the Toolbar for the activity 


    toolbar = (Toolbar) findViewById(R.id.tool_bar); 
    setSupportActionBar(toolbar); 

    // Creating The ViewPagerAdapter and Passing Fragment Manager, Titles fot the Tabs and Number Of Tabs. 
    adapter = new ViewPagerAdapter(getSupportFragmentManager(), Titles, Numboftabs); 

    // Assigning ViewPager View and setting the adapter 
    pager = (ViewPager) findViewById(R.id.pager); 
    pager.setAdapter(adapter); 



    // Assiging the Sliding Tab Layout View 
    tabs=(SlidingTabLayout) 

    findViewById(R.id.tabs); 

    tabs.setDistributeEvenly(true); // To make the Tabs Fixed set this true, This makes the tabs Space Evenly in Available width 

    // Setting Custom Color for the Scroll bar indicator of the Tab View 
    tabs.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() 

          { 
           @Override 
           public int getIndicatorColor(int position) { 


            return getResources().getColor(R.color.tabsScrollColor); 

           } 
          } 

    ); 
    // Setting the ViewPager For the SlidingTabsLayout 
    tabs.setViewPager(pager); 

Answer 1

在ViewPagerAdapter類嘗試的

private int[] imageResId = { 
      R.drawable.ic_home, 
      R.drawable.ic_my_timeline, 
      R.drawable.ic_my_pages, 
      R.drawable.ic_my_groups, 
      R.drawable.ic_liked_pages 
    }; 

@Override 
public CharSequence getPageTitle(int position) { 
    Drawable image = mContext.getResources().getDrawable(imageResId[position]); 
    image.setBounds(0, 0, image.getIntrinsicWidth(), image.getIntrinsicHeight()); 
    SpannableString sb = new SpannableString(" "); 
    ImageSpan imageSpan = new ImageSpan(image, ImageSpan.ALIGN_BOTTOM); 
    sb.setSpan(imageSpan, 0, 1, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE); 
    return sb; 
} 

代替

@Override 
public CharSequence getPageTitle(int position) { 
    return Titles[position]; 
} 

。

EDIT1：

在你的活動變化

adapter = new ViewPagerAdapter(getSupportFragmentManager(), Titles, Numboftabs); 

到

adapter = new ViewPagerAdapter(this, getSupportFragmentManager(), Titles, Numboftabs); 

然後在你的ViewPagerAdapter需要以下更改。

Context mContext; 
public ViewPagerAdapter(Context context, FragmentManager fm,CharSequence mTitles[], int mNumbOfTabsumb) { 
    super(fm); 
    this.mContext = context; 
    this.Titles = mTitles; 
    this.NumbOfTabs = mNumbOfTabsumb; 

} 

EDIT2：

嘗試在ViewPagerAdapter延長FragmentPagerAdapter代替FragmentStatePagerAdapter。

在您的主要活動代碼應該是這樣的：

tabs=(SlidingTabLayout)findViewById(R.id.tabs); 
tabs.setCustomTabView(R.layout.custom_tab, 0); 

這裏是custom_tab.xml：

<?xml version="1.0" encoding="utf-8"?> 
<TextView xmlns:android="http://schemas.android.com/apk/res/android" 
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content" 
    android:textSize="12sp" 
    android:textStyle="bold" 
    android:background="?android:selectableItemBackground" 
    android:padding="16dp" 
    android:gravity="center" /> 

希望這有助於！