Java tutorial
/* * Copyright (C) 2015 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.supportv4.view; import android.os.Bundle; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentStatePagerAdapter; import android.support.v4.view.ViewPager; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.widget.Button; import android.widget.CheckBox; import android.widget.TextView; import android.widget.Toast; import com.example.android.supportv4.R; import java.lang.Override; import java.lang.Runnable; public class ViewPagerActivity extends FragmentActivity { private static int[] PAGE_COLORS = { 0xFF700000, 0xFF500020, 0xFF300030, 0xFF200050, 0xFF000070 }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.view_pager_sample); final ViewPager viewPager = (ViewPager) findViewById(R.id.view_pager); viewPager.setAdapter(new FragmentStatePagerAdapter(getSupportFragmentManager()) { @Override public int getCount() { return PAGE_COLORS.length; } @Override public CharSequence getPageTitle(int position) { return "Page " + position; } @Override public Fragment getItem(int position) { Fragment fragment = new DemoObjectFragment(); Bundle args = new Bundle(); args.putInt(DemoObjectFragment.ARG_INDEX, position); fragment.setArguments(args); return fragment; } }); final CheckBox smoothScroll = (CheckBox) findViewById(R.id.view_pager_smooth_scroll); Button switchTabsButton = (Button) findViewById(R.id.view_pager_switch_tabs_button); switchTabsButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { viewPager.setCurrentItem(2, smoothScroll.isChecked()); Toast.makeText(view.getContext(), "Current item = " + viewPager.getCurrentItem(), Toast.LENGTH_SHORT).show(); } }); Button doubleSwitchTabsButton = (Button) findViewById(R.id.view_pager_double_switch_tabs_button); doubleSwitchTabsButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { viewPager.setCurrentItem(0, smoothScroll.isChecked()); viewPager.setCurrentItem(2, smoothScroll.isChecked()); Toast.makeText(view.getContext(), "Current item = " + viewPager.getCurrentItem(), Toast.LENGTH_SHORT).show(); } }); } public static class DemoObjectFragment extends Fragment { public static final String ARG_INDEX = "index"; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { // The last two arguments ensure LayoutParams are inflated // properly. View rootView = inflater.inflate(R.layout.view_pager_tab, container, false); Bundle args = getArguments(); int position = args.getInt(ARG_INDEX); rootView.setBackgroundColor(PAGE_COLORS[position]); ((TextView) rootView).setText(Integer.toString(position)); return rootView; } } }