Android SlidingTabLayout定制分割线和指示条颜色


Android SlidingTabLayout定制分割线和指示条颜色

Android SlidingTabLayout默认的滑动指示条是系统默认的某个蓝色系色值，分割线是灰色。如果要自定义实现滑动指示条和分割线定制颜色，则主要通过SlidingTabLayout的setCustomTabColorizer()方法实现。

现在给出一个例子加以说明。

（1）首先做一个MainActivity，此MainActivity没有实质意义，只是作为第二步加载要实现SlidingTabLayout Fragment的“容器”。

（2）在一个Fragment实现SlidingTabLayout，然后将此Fragment加载。

测试用的主Activity MainActivity.java ：

package zhangphil.tabs;

import android.os.Bundle;
import android.support.v4.app.FragmentActivity;
import android.support.v4.app.FragmentTransaction;

public class MainActivity extends FragmentActivity {

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

if (savedInstanceState == null) {
FragmentTransaction transaction = getSupportFragmentManager().beginTransaction();
TabFragment fragment = new TabFragment();
transaction.replace(R.id.content_fragment, fragment);
transaction.commit();
}
}
}


MainActivity.java需要的布局文件：activity_main.xml：

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

<FrameLayout
android:id="@+id/content_fragment"
android:layout_width="match_parent"
android:layout_height="match_parent" >
</FrameLayout>

</LinearLayout>
TabFragment.java代码文件：

package zhangphil.tabs;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentPagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

import java.util.ArrayList;

import zhangphil.view.SlidingTabLayout;

public class TabFragment extends Fragment {

private static class PagerItem {
private final CharSequence mTitle;
private final int mIndicatorColor;
private final int mDividerColor;

public PagerItem(CharSequence title, int indicatorColor, int dividerColor) {
mTitle = title;
mIndicatorColor = indicatorColor;
mDividerColor = dividerColor;
}

public Fragment createFragment() {
return ContentFragment.newInstance(mTitle, mIndicatorColor, mDividerColor);
}

public CharSequence getTitle() {
return mTitle;
}

public int getIndicatorColor() {
return mIndicatorColor;
}

public int getDividerColor() {
return mDividerColor;
}
}

private ArrayList<PagerItem> mTabCards = new ArrayList<PagerItem>();

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

mTabCards.add(new PagerItem("Tab A", Color.RED, Color.RED));

mTabCards.add(new PagerItem("Tab B", Color.YELLOW, Color.YELLOW));

mTabCards.add(new PagerItem("Tab C", Color.GREEN, Color.GREEN));

mTabCards.add(new PagerItem("Tab D", Color.TRANSPARENT, Color.TRANSPARENT));

mTabCards.add(new PagerItem("Tab E", Color.CYAN, Color.CYAN));

mTabCards.add(new PagerItem("Tab E", Color.BLACK, Color.BLACK));
}

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

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
ViewPager mViewPager = (ViewPager) view.findViewById(R.id.viewpager);
mViewPager.setAdapter(new MyFragmentPagerAdapter(getChildFragmentManager()));

SlidingTabLayout mSlidingTabLayout = (SlidingTabLayout) view.findViewById(R.id.sliding_tabs);
mSlidingTabLayout.setViewPager(mViewPager);

mSlidingTabLayout.setCustomTabColorizer(new SlidingTabLayout.TabColorizer() {

@Override
public int getIndicatorColor(int position) {
return mTabCards.get(position).getIndicatorColor();
}

@Override
public int getDividerColor(int position) {
return mTabCards.get(position).getDividerColor();
}
});
}

private class MyFragmentPagerAdapter extends FragmentPagerAdapter {

MyFragmentPagerAdapter(FragmentManager fm) {
super(fm);
}

@Override
public Fragment getItem(int pos) {
return mTabCards.get(pos).createFragment();
}

@Override
public int getCount() {
return mTabCards.size();
}

@Override
public CharSequence getPageTitle(int position) {
return mTabCards.get(position).getTitle();
}
}

public static class ContentFragment extends Fragment {

private static final String KEY_TITLE = "title";
private static final String KEY_INDICATOR_COLOR = "indicator_color";
private static final String KEY_DIVIDER_COLOR = "divider_color";

public static ContentFragment newInstance(CharSequence title, int indicatorColor, int dividerColor) {
Bundle bundle = new Bundle();
bundle.putCharSequence(KEY_TITLE, title);
bundle.putInt(KEY_INDICATOR_COLOR, indicatorColor);
bundle.putInt(KEY_DIVIDER_COLOR, dividerColor);

ContentFragment fragment = new ContentFragment();
fragment.setArguments(bundle);

return fragment;
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
TextView tv = new TextView(getActivity());
tv.setGravity(Gravity.CENTER);
return tv;
}

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
super.onViewCreated(view, savedInstanceState);

TextView tv = (TextView) view;

Bundle args = getArguments();

String content = "";
if (args != null) {
String title = args.getCharSequence(KEY_TITLE) + "";

int indicatorColor = args.getInt(KEY_INDICATOR_COLOR);
String indicatorColors = Integer.toHexString(indicatorColor) + "";

int dividerColor = args.getInt(KEY_DIVIDER_COLOR);
String dividerColors = Integer.toHexString(dividerColor) + "";

content = content + "标题:" + title + "\n";
content = content + "indicatorColor:" + indicatorColors + "\n";
content = content + "dividerColor:" + dividerColors;
}

tv.setText(content);
}
}
}

TabFragment.java需要的布局文件fragment.xml文件代码：

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

<zhangphil.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="wrap_content" />

</LinearLayout>

不要忘了引用Android官方实现的SlidingTabLayout和SlidingTabStrip。

代码层次结构如图所示：



代码运行结果如图所示：