Android SlidingTabLayout带图标

Question

我在我的视图中使用谷歌的SlidingTabLayout,但我想在标签中添加图标.我正在使用这个http://developer.android.com/samples/SlidingTabsBasic/src/com.example.android.common/view/SlidingTabLayout.html 任何人都可以帮忙吗？

void setUpPager(View view){
    mViewPager = (ViewPager) view.findViewById(R.id.viewpager);
    mViewPager.setAdapter(new TabsPagerAdapter(getActivity()));
    mSlidingTabLayout = (SlidingTabLayout) view.findViewById(R.id.sliding_tabs);
    mSlidingTabLayout.setViewPager(mViewPager);
  }

这是我的xml:

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
              android:layout_width="match_parent"
              android:layout_height="match_parent"
              android:orientation="vertical">

  <android.common.view.SlidingTabLayout
      android:id="@+id/sliding_tabs"
      android:layout_width="match_parent"
      android:layout_height="wrap_content" />

  <android.support.v4.view.ViewPager
      android:id="@+id/viewpager"
      android:layout_width="match_parent"
      android:layout_height="0px"
      android:layout_weight="1"
      android:background="@android:color/white"/>

</LinearLayout>

Answer 1

只想为正确和接受的答案举例说明.:)
首先,在将适配器添加到viewpager时添加选项卡并设置其自定义视图.例如,请参阅以下行:

mViewpager = (ViewPager) view.findViewById(R.id.pager);

//Do something with your view before setting up adapter

ViewPager.setAdapter(mSectionsPagerAdapter);
mSlidingTabLayout = (SlidingTabLayout) View().findViewById(R.id.sliding_tabs);
mSlidingTabLayout.setCustomTabView(R.layout.custom_tab_title, R.id.tabtext);
mSlidingTabLayout.setViewPager(mViewPager);

sliding_tabs要添加的tabs_titles 在哪里,并在xml文件中定义viewpager:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:fitsSystemWindows="true">

    <com.packagename.SlidingTabLayout
        android:id="@+id/sliding_tabs"
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        />

    <android.support.v4.view.ViewPager xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:tools="http://schemas.android.com/tools"
        android:id="@+id/pager"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:layout_below="@+id/sliding_tabs"
        tools:context=".ActivityUser"
        android:fitsSystemWindows="true"
        android:textStyle="bold"
        android:textSize="20dp"/>

</RelativeLayout>

以及文件夹中custom_tab_title的单独xml文件.layout例如:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:orientation="vertical" android:layout_width="match_parent"
android:layout_height="match_parent"
android:id="@+id/titletab">

    <ImageView
    android:id="@+id/tabimage"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:layout_gravity="top"
    android:layout_marginLeft="2dp"
    />

    <TextView
    android:id="@+id/tabtext"
    android:layout_width="match_parent"
    android:layout_height="50dp"
    android:gravity="bottom"
    android:paddingBottom="15dp"
    android:paddingLeft="4dp"
    android:paddingRight="4dp"/>

</LinearLayout>

您可以通过以下方式设置特定标签的图像:

Drawable tab_image = getResources().getDrawable(getResources().getIdentifier("image_name_in_drawable", "drawable", "com.packagename"));
tab_image.setBounds(0, 0, 40, 40);  //Setting up the resolution for image
ImageSpan imageSpanresource = new ImageSpan(tab_image);
//Notice the additional space at the end of the String
resourcesstring = "Tab1 ";
//here we are setting up the position to display image..
SpannableString viewpager_tab_title = new SpannableString(resourcesstring ); 
viewpager_tab_title.setSpan(imageSpanresource, resourcesstring.length()-1, resourcesstring.length(), 0);

请注意,我已经添加了一个额外的空间,viewpager_tab_title并将图像设置到该位置,以便完全显示实际的字符串.

Answer 2

使用mSlidingTabLayout.setCustomTabView(int layoutResId, int textViewId)充气自定义布局的SlidingTabLayout标签视图.

当SlidingTabLayout试图填充选项卡条,初步查找任何指定的布局资源膨胀.否则,它会膨胀默认选项卡视图.

Answer 3

要以您希望的方式自定义SlidingTabLayout,您只需要修改方法populateTabStrip().使用这种方法,您不需要关心任何TextView.

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

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

            tabView = LayoutInflater.from(getContext()).inflate(R.layout.tab_layout, mTabStrip,
                    false);

            ImageView iconImageView = (ImageView) tabView.findViewById(R.id.tab_layout_icon);
            iconImageView.setImageDrawable(getContext().getResources().getDrawable(getIconResourceArray()[i]));

            tabView.setOnClickListener(tabClickListener);

            mTabStrip.addView(tabView);
        }
}

你的布局可能是这样的:

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="75dp"
    android:paddingTop="15dp"
    android:layout_height="50dp"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/tab_layout_icon"
        android:layout_width="20dp"
        android:layout_height="20dp"
        android:layout_gravity="center" />
</LinearLayout>

实现getResourceArray()方法的方式取决于您.我是这样做的:

public class IconSlidingTabLayout extends HorizontalScrollView {
    private Integer[] mIconResourceArray;

    ...

    public Integer[] getIconResourceArray() {
        return mIconResourceArray;
    }

    public void setIconResourceArray(Integer[] mIconResourceArray) {
        this.mIconResourceArray = mIconResourceArray;
    }
}

在活动中:

mSlidingTabLayout = (IconSlidingTabLayout) findViewById(R.id.icon_sliding_tab_layout);
Integer[] iconResourceArray = { R.drawable.news_tab_icon,
        R.drawable.challenges_tab_icon, R.drawable.trophies_tab_icon,
        R.drawable.leaderboard_tab_icon };
mSlidingTabLayout.setIconResourceArray(iconResourceArray);

请注意,为了能够访问R.layout.tab_layout*,您必须在SlidingTabStrip中默认导入yourpackage.R而不是android.R.