Java tutorial
/* * Copyright (c) 2013 Alex Curran * * 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.espian.library.about; import android.content.ClipData; import android.content.ClipboardManager; import android.content.Context; import android.content.Intent; import android.net.Uri; import android.os.Build; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.view.PagerAdapter; import android.support.v4.view.ViewPager; import android.text.Html; import android.text.Spanned; import android.view.LayoutInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.TextView; import android.widget.Toast; import java.io.BufferedReader; import java.io.IOException; import java.io.InputStream; import java.io.InputStreamReader; public abstract class AbsAboutActivity extends FragmentActivity { public void onCreate(Bundle saved) { super.onCreate(saved); setContentView(R.layout.base_title_pager); ViewPager pager = (ViewPager) findViewById(R.id.base_pager); pager.setAdapter(new AboutPager(this)); pager.setOffscreenPageLimit(3); pager.setCurrentItem(1); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setHomeButtonEnabled(true); } @Override public boolean onOptionsItemSelected(MenuItem item) { if (item.getItemId() == android.R.id.home) { finish(); return true; } else return super.onOptionsItemSelected(item); } public class AboutPager extends PagerAdapter { public final String[] SHORT_TITLES = new String[] { "Changes", "About", "Contact", "Licenses" }; private Context mContext; public AboutPager(Context c) { super(); mContext = c; } @Override public int getCount() { return 4; } @Override public CharSequence getPageTitle(int position) { return SHORT_TITLES[position].toUpperCase(); } @Override public void destroyItem(ViewGroup container, int position, Object object) { container.removeView((View) object); } @Override public Object instantiateItem(ViewGroup container, int position) { View view; LayoutInflater inflater = LayoutInflater.from(mContext); if (position == 0) { view = inflater.inflate(R.layout.page_changes, null); TextView tv = (TextView) view.findViewById(R.id.change_text); tv.setText(getRawAsset(R.raw.change, AbsAboutActivity.this)); } else if (position == 1) { view = inflater.inflate(R.layout.page_about, null); TextView tv2 = (TextView) view.findViewById(R.id.textView1); tv2.setText(String.format(getString(R.string.version_text, getString(R.string.version)))); } else if (position == 2) { view = inflater.inflate(R.layout.page_contact, null); } else { view = inflater.inflate(R.layout.page_licenses, null); TextView licenseBlurb = (TextView) view.findViewById(R.id.licenses_text); licenseBlurb.setText(createLicense().toString()); } container.addView(view); return view; } @Override public boolean isViewFromObject(View view, Object o) { return view == o; } } /** * Read a raw file and return it as a HTML-parsed object * @param id The ID of the raw asset * @param c Context to retrieve the asset from * @return HTML-parsed contents of the raw file */ public static Spanned getRawAsset(int id, Context c) { InputStream mStream = c.getResources().openRawResource(id); InputStreamReader mRead = new InputStreamReader(mStream); BufferedReader mReader = new BufferedReader(mRead); StringBuilder returner = new StringBuilder(); String line; try { while ((line = mReader.readLine()) != null) { returner.append(line); } return Html.fromHtml(returner.toString()); } catch (IOException e) { e.printStackTrace(); } return null; } /** * Create the license {@link String} to show * @return */ public abstract LicenseBuilder createLicense(); public void copyEmail(View v) { copy("Email", Uri.parse("mailto:alexc@espiandev.co.uk"), "alexc@espiandev.co.uk"); } public void email(View v) { start(Uri.parse("mailto:alexc@espiandev.co.uk")); } public void copyGPlus(View v) { copy("Google+", Uri.parse("https://plus.google.com/110510888639261520925/posts"), "https://plus.google.com/110510888639261520925/posts"); } public void gPlus(View v) { start(Uri.parse("https://plus.google.com/110510888639261520925/posts")); } public void copyTwitter(View v) { copy("Twitter", Uri.parse("https://twitter.com/espiandev"), "https://twitter.com/espiandev"); } public void twitter(View v) { start(Uri.parse("https://twitter.com/espiandev")); } public void website(View v) { start(Uri.parse("http://www.espiandev.co.uk")); } public void copyWebsite(View v) { copy("Website", Uri.parse("http://www.espiandev.co.uk"), "http://www.espiandev.co.uk"); } public void start(Uri uri) { startActivity(new Intent(Intent.ACTION_VIEW).setData(uri)); } public void copy(String type, Uri uri, String backup) { if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.HONEYCOMB) { ClipboardManager newCm = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE); newCm.setPrimaryClip(ClipData.newUri(getContentResolver(), type, uri)); } else { android.text.ClipboardManager oldCm = (android.text.ClipboardManager) getSystemService( Context.CLIPBOARD_SERVICE); oldCm.setText(backup); } Toast.makeText(this, getString(R.string.copy_to_clip, backup), Toast.LENGTH_SHORT).show(); } }