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feat: TabLayoutSupport Lib supports LoopViewPager
1 parent 194ad0a commit 8c54ffd

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7 files changed

+177
-6
lines changed

7 files changed

+177
-6
lines changed

‎app/src/main/AndroidManifest.xml

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@@ -32,6 +32,10 @@
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android:name=".MaterialDemoActivity"
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android:theme="@style/Theme.DesignDemo">
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</activity>
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<activity
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android:name=".MaterialDemoWithLoopPagerActivity"
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android:theme="@style/Theme.DesignDemo">
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</activity>
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<activity
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android:name=".ReverseSingleFlingPagerActivity" >
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</activity>

‎app/src/main/java/com/lsjwzh/widget/recyclerviewpagerdeomo/MainActivity.java

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@@ -62,6 +62,12 @@ void onClick() {
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startActivity(new Intent(MainActivity.this, MaterialDemoActivity.class));
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}
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});
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mDemoListAdapter.add(new DemoItem("Material Demo With loop pager") {
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@Override
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void onClick() {
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startActivity(new Intent(MainActivity.this, MaterialDemoWithLoopPagerActivity.class));
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}
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});
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mDemoListAdapter.add(new DemoItem("Vertical ViewPager Demo") {
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@Override
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void onClick() {

‎app/src/main/java/com/lsjwzh/widget/recyclerviewpagerdeomo/MaterialDemoWithLoopPagerActivity.java

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package com.lsjwzh.widget.recyclerviewpagerdeomo;
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import java.util.LinkedHashMap;
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import android.os.Bundle;
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import android.support.design.widget.TabLayout;
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import android.support.v4.app.Fragment;
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import android.support.v4.app.FragmentManager;
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import android.support.v7.app.AppCompatActivity;
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import android.support.v7.widget.LinearLayoutManager;
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import android.support.v7.widget.Toolbar;
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import android.util.Log;
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import com.lsjwzh.widget.recyclerviewpager.FragmentStatePagerAdapter;
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import com.lsjwzh.widget.recyclerviewpager.LoopRecyclerViewPager;
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import com.lsjwzh.widget.recyclerviewpager.RecyclerViewPager;
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import com.lsjwzh.widget.recyclerviewpager.TabLayoutSupport;
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public class MaterialDemoWithLoopPagerActivity extends AppCompatActivity {
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protected LoopRecyclerViewPager mRecyclerView;
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private FragmentsAdapter mAdapter;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.demo_material_loop_pager);
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setSupportActionBar((Toolbar) findViewById(R.id.toolbar));
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initViewPager();
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initTabLayout();
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}
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private void initTabLayout() {
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//给TabLayout增加Tab, 并关联ViewPager
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TabLayout tabLayout = (TabLayout) findViewById(R.id.tabs);
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TabLayoutSupport.setupWithViewPager(tabLayout, mRecyclerView, mAdapter);
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}
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protected void initViewPager() {
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mRecyclerView = (LoopRecyclerViewPager) findViewById(R.id.viewpager);
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LinearLayoutManager layout = new LinearLayoutManager(this, LinearLayoutManager.HORIZONTAL,
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false);
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mRecyclerView.setLayoutManager(layout);
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mAdapter = new FragmentsAdapter(getSupportFragmentManager());
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mRecyclerView.setAdapter(mAdapter);
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mRecyclerView.setHasFixedSize(true);
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mRecyclerView.setLongClickable(true);
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mRecyclerView.addItemDecoration(new SpacesItemDecoration(50, mRecyclerView.getAdapter().getItemCount()));
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mRecyclerView.addOnPageChangedListener(new RecyclerViewPager.OnPageChangedListener() {
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@Override
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public void OnPageChanged(int oldPosition, int newPosition) {
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Log.d("test", "oldPosition:" + oldPosition + " newPosition:" + newPosition);
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}
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});
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}
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class FragmentsAdapter extends FragmentStatePagerAdapter implements TabLayoutSupport.ViewPagerTabLayoutAdapter {
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LinkedHashMap<Integer, Fragment> mFragmentCache = new LinkedHashMap<>();
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public FragmentsAdapter(FragmentManager fm) {
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super(fm);
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}
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@Override
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public Fragment getItem(int position, Fragment.SavedState savedState) {
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Fragment f = mFragmentCache.containsKey(position) ? mFragmentCache.get(position)
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: new CheeseListFragment();
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Log.e("test", "getItem:" + position + " from cache" + mFragmentCache.containsKey
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(position));
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if (savedState == null || f.getArguments() == null) {
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Bundle bundle = new Bundle();
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bundle.putInt("index", position);
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f.setArguments(bundle);
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Log.e("test", "setArguments:" + position);
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} else if (!mFragmentCache.containsKey(position)) {
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f.setInitialSavedState(savedState);
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Log.e("test", "setInitialSavedState:" + position);
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}
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mFragmentCache.put(position, f);
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return f;
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}
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@Override
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public void onDestroyItem(int position, Fragment fragment) {
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// onDestroyItem
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while (mFragmentCache.size() > 5) {
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Object[] keys = mFragmentCache.keySet().toArray();
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mFragmentCache.remove(keys[0]);
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}
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}
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@Override
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public String getPageTitle(int position) {
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return "item-" + position;
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}
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@Override
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public int getItemCount() {
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return 10;
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}
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}
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}

‎app/src/main/res/layout/demo_material_loop_pager.xml

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<?xml version="1.0" encoding="utf-8"?>
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<android.support.design.widget.CoordinatorLayout
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android:id="@+id/main_content"
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xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:fitsSystemWindows="true">
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<android.support.design.widget.AppBarLayout
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android:id="@+id/appbar"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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android:background="?attr/colorPrimary"
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android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar">
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<android.support.v7.widget.Toolbar
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android:id="@+id/toolbar"
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android:layout_width="match_parent"
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android:layout_height="?attr/actionBarSize"
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android:background="?attr/colorPrimary"
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app:layout_scrollFlags="scroll|enterAlways" />
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<android.support.design.widget.TabLayout
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android:id="@+id/tabs"
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android:layout_width="match_parent"
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android:layout_height="wrap_content"
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app:tabGravity="fill"
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app:tabMode="scrollable"/>
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</android.support.design.widget.AppBarLayout>
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<com.lsjwzh.widget.recyclerviewpager.LoopRecyclerViewPager
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android:id="@+id/viewpager"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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android:clipToPadding="false"
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app:rvp_singlePageFling="false"
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app:rvp_triggerOffset="0.1"
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app:layout_behavior="@string/appbar_scrolling_view_behavior"
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/>
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</android.support.design.widget.CoordinatorLayout>

‎app/src/main/res/layout/fragment_cheese_list.xml

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@@ -14,7 +14,7 @@
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~ See the License for the specific language governing permissions and
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~ limitations under the License.
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-->
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<android.support.v7.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
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android:id="@+id/recyclerview"
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android:layout_width="match_parent"
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android:layout_height="match_parent" />
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<android.support.v7.widget.RecyclerView android:id="@+id/recyclerview"
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xmlns:android="http://schemas.android.com/apk/res/android"
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android:layout_width="match_parent"
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android:layout_height="match_parent"/>

‎lib/src/main/java/com/lsjwzh/widget/recyclerviewpager/LoopRecyclerViewPager.java

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@@ -67,6 +67,10 @@ public void scrollToPosition(int position) {
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*/
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public int getActualCurrentPosition() {
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int position = getCurrentPosition();
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return transformToActualPosition(position);
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}
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public int transformToActualPosition(int position) {
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return position % getActualItemCountFromAdpater();
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}
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‎tablayoutsupport/src/main/java/com/lsjwzh/widget/recyclerviewpager/TabLayoutSupport.java

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@@ -19,7 +19,8 @@ public static void setupWithViewPager(@NonNull TabLayout tabLayout
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for (int count = viewPagerTabLayoutAdapter.getItemCount(); i < count; ++i) {
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tabLayout.addTab(tabLayout.newTab().setText(viewPagerTabLayoutAdapter.getPageTitle(i)));
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}
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final TabLayoutOnPageChangeListener listener = new TabLayoutOnPageChangeListener(tabLayout);
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final TabLayoutOnPageChangeListener listener
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= new TabLayoutOnPageChangeListener(tabLayout, viewPager);
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viewPager.addOnScrollListener(listener);
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viewPager.addOnPageChangedListener(listener);
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tabLayout.setOnTabSelectedListener(new ViewPagerOnTabSelectedListener(viewPager));
@@ -52,11 +53,13 @@ public void onTabReselected(TabLayout.Tab tab) {
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public static class TabLayoutOnPageChangeListener extends RecyclerView.OnScrollListener implements RecyclerViewPager
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.OnPageChangedListener {
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private final WeakReference<TabLayout> mTabLayoutRef;
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private final WeakReference<RecyclerViewPager> mViewPagerRef;
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private int mPositionBeforeScroll;
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private int mPagerLeftBeforeScroll;
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public TabLayoutOnPageChangeListener(TabLayout tabLayout) {
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public TabLayoutOnPageChangeListener(TabLayout tabLayout, RecyclerViewPager viewPager) {
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this.mTabLayoutRef = new WeakReference<>(tabLayout);
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this.mViewPagerRef = new WeakReference<>(viewPager);
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}
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@Override
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@Override
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public void OnPageChanged(int oldPosition, int newPosition) {
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if (mViewPagerRef.get() == null) {
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return;
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}
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if (mViewPagerRef.get() instanceof LoopRecyclerViewPager) {
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newPosition = ((LoopRecyclerViewPager) mViewPagerRef.get())
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.transformToActualPosition(newPosition);
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}
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TabLayout tabLayout = this.mTabLayoutRef.get();
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if (tabLayout != null && tabLayout.getTabAt(newPosition) != null) {
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tabLayout.getTabAt(newPosition).select();

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