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/*
* Copyright (C) 2013 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.example.android.slidingtabsbasic;
import com.example.android.common.logger.Log;
import com.example.android.common.view.SlidingTabLayout;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.support.v4.view.PagerAdapter;
import android.support.v4.view.ViewPager;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;
/**
* A basic sample which shows how to use {@link com.example.android.common.view.SlidingTabLayout}
* to display a custom {@link ViewPager} title strip which gives continuous feedback to the user
* when scrolling.
*/
public class SlidingTabsBasicFragment extends Fragment {
static final String LOG_TAG = "SlidingTabsBasicFragment";
/**
* A custom {@link ViewPager} title strip which looks much like Tabs present in Android v4.0 and
* above, but is designed to give continuous feedback to the user when scrolling.
*/
private SlidingTabLayout mSlidingTabLayout;
/**
* A {@link ViewPager} which will be used in conjunction with the {@link SlidingTabLayout} above.
*/
private ViewPager mViewPager;
/**
* Inflates the {@link View} which will be displayed by this {@link Fragment}, from the app's
* resources.
*/
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
return inflater.inflate(R.layout.fragment_sample, container, false);
}
// BEGIN_INCLUDE (fragment_onviewcreated)
/**
* This is called after the {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)} has finished.
* Here we can pick out the {@link View}s we need to configure from the content view.
*
* We set the {@link ViewPager}'s adapter to be an instance of {@link SamplePagerAdapter}. The
* {@link SlidingTabLayout} is then given the {@link ViewPager} so that it can populate itself.
*
* @param view View created in {@link #onCreateView(LayoutInflater, ViewGroup, Bundle)}
*/
@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
// BEGIN_INCLUDE (setup_viewpager)
// Get the ViewPager and set it's PagerAdapter so that it can display items
mViewPager = (ViewPager) view.findViewById(R.id.viewpager);
mViewPager.setAdapter(new SamplePagerAdapter());
// END_INCLUDE (setup_viewpager)
// BEGIN_INCLUDE (setup_slidingtablayout)
// Give the SlidingTabLayout the ViewPager, this must be done AFTER the ViewPager has had
// it's PagerAdapter set.
mSlidingTabLayout = (SlidingTabLayout) view.findViewById(R.id.sliding_tabs);
mSlidingTabLayout.setViewPager(mViewPager);
// END_INCLUDE (setup_slidingtablayout)
}
// END_INCLUDE (fragment_onviewcreated)
/**
* The {@link android.support.v4.view.PagerAdapter} used to display pages in this sample.
* The individual pages are simple and just display two lines of text. The important section of
* this class is the {@link #getPageTitle(int)} method which controls what is displayed in the
* {@link SlidingTabLayout}.
*/
class SamplePagerAdapter extends PagerAdapter {
/**
* @return the number of pages to display
*/
@Override
public int getCount() {
return 10;
}
/**
* @return true if the value returned from {@link #instantiateItem(ViewGroup, int)} is the
* same object as the {@link View} added to the {@link ViewPager}.
*/
@Override
public boolean isViewFromObject(View view, Object o) {
return o == view;
}
// BEGIN_INCLUDE (pageradapter_getpagetitle)
/**
* Return the title of the item at {@code position}. This is important as what this method
* returns is what is displayed in the {@link SlidingTabLayout}.
* <p>
* Here we construct one using the position value, but for real application the title should
* refer to the item's contents.
*/
@Override
public CharSequence getPageTitle(int position) {
return "Item " + (position + 1);
}
// END_INCLUDE (pageradapter_getpagetitle)
/**
* Instantiate the {@link View} which should be displayed at {@code position}. Here we
* inflate a layout from the apps resources and then change the text view to signify the position.
*/
@Override
public Object instantiateItem(ViewGroup container, int position) {
// Inflate a new layout from our resources
View view = getActivity().getLayoutInflater().inflate(R.layout.pager_item,
container, false);
// Add the newly created View to the ViewPager
container.addView(view);
// Retrieve a TextView from the inflated View, and update it's text
TextView title = (TextView) view.findViewById(R.id.item_title);
title.setText(String.valueOf(position + 1));
Log.i(LOG_TAG, "instantiateItem() [position: " + position + "]");
// Return the View
return view;
}
/**
* Destroy the item from the {@link ViewPager}. In our case this is simply removing the
* {@link View}.
*/
@Override
public void destroyItem(ViewGroup container, int position, Object object) {
container.removeView((View) object);
Log.i(LOG_TAG, "destroyItem() [position: " + position + "]");
}
}
}
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