Java tutorial
package com.playground.notification.app.fragments; import android.app.Dialog; import android.content.Context; import android.content.DialogInterface; import android.content.pm.PackageInfo; import android.content.pm.PackageManager; import android.os.Bundle; import android.support.v4.app.DialogFragment; import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentTransaction; import android.support.v7.app.AlertDialog; import android.text.Html; import android.text.SpannableString; import android.text.SpannableStringBuilder; import android.text.method.LinkMovementMethod; import android.text.style.ClickableSpan; import android.view.LayoutInflater; import android.view.View; import android.view.View.OnClickListener; import android.webkit.WebView; import android.widget.TextView; import com.playground.notification.R; import com.playground.notification.bus.EULAConfirmedEvent; import com.playground.notification.bus.EULARejectEvent; import com.playground.notification.utils.Prefs; import com.playground.notification.utils.Utils; import de.greenrobot.event.EventBus; /** * Dialog popup a "About", include legal text, open source licenses etc. * <p/> * A lot inspired by App <a href="https://github.com/google/iosched/blob/master/android/src/main/java/com/google/samples * /apps/iosched/util/HelpUtils.java">Google I/O 2014</a> * * @author Xinyue Zhao */ public final class AboutDialogFragment extends DialogFragment { /** * Error-handling. */ private static final String VERSION_UNAVAILABLE = "N/A"; /** * Initialize an {@link AboutDialogFragment}. * * @param context * A {@link Context} object. * * @return An instance of {@link AboutDialogFragment}. */ public static DialogFragment newInstance(Context context) { return (DialogFragment) Fragment.instantiate(context, AboutDialogFragment.class.getName()); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setCancelable(false); } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { // Get app version PackageManager pm = getActivity().getPackageManager(); String packageName = getActivity().getPackageName(); String versionName; try { PackageInfo info = pm.getPackageInfo(packageName, 0); versionName = info.versionName; } catch (PackageManager.NameNotFoundException e) { versionName = VERSION_UNAVAILABLE; } // About. SpannableStringBuilder aboutBody = new SpannableStringBuilder(); aboutBody.append( Html.fromHtml(getString(R.string.about_body, getString(R.string.application_name), versionName))); // Licenses. SpannableString licensesLink = new SpannableString(getString(R.string.about_licenses)); licensesLink.setSpan(new ClickableSpan() { @Override public void onClick(View view) { showOpenSourceLicenses(getActivity()); } }, 0, licensesLink.length(), 0); aboutBody.append("\n\n"); aboutBody.append(licensesLink); // End User License Agreement. SpannableString eulaLink = new SpannableString(getString(R.string.about_eula)); eulaLink.setSpan(new ClickableSpan() { @Override public void onClick(View view) { showEula(getActivity()); } }, 0, eulaLink.length(), 0); aboutBody.append("\n\n"); aboutBody.append(eulaLink); // Show "About" dialog. LayoutInflater layoutInflater = (LayoutInflater) getActivity() .getSystemService(Context.LAYOUT_INFLATER_SERVICE); View dialogV = layoutInflater.inflate(R.layout.fragment_dialog_about, null); ; TextView aboutBodyView = (TextView) dialogV.findViewById(R.id.dialog_text_tv); aboutBodyView.setText(aboutBody); aboutBodyView.setMovementMethod(new LinkMovementMethod()); dialogV.findViewById(R.id.powered_by_ll).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Utils.openExternalBrowser(getActivity(), "http://" + getString(R.string.support_spielplatz_radar)); } }); dialogV.findViewById(R.id.weather_by_ll).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Utils.openExternalBrowser(getActivity(), "http://" + getString(R.string.support_openweathermap)); } }); return new AlertDialog.Builder(getActivity()).setTitle(R.string.action_about).setView(dialogV) .setPositiveButton(R.string.btn_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { dialog.dismiss(); } }).create(); } /** * To open showing open source licenses. * * @param activity * Host {@link android.support.v4.app.FragmentActivity}. */ private static void showOpenSourceLicenses(FragmentActivity activity) { FragmentManager fm = activity.getSupportFragmentManager(); FragmentTransaction ft = fm.beginTransaction(); Fragment prev = fm.findFragmentByTag("dialog_licenses"); if (prev != null) { ft.remove(prev); } ft.addToBackStack(null); new OpenSourceLicensesDialog().show(ft, "dialog_licenses"); } /** * Dialog to open showing open source licenses. * * @author Xinyue Zhao */ public static class OpenSourceLicensesDialog extends DialogFragment { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setCancelable(false); } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { WebView webView = new WebView(getActivity()); webView.loadUrl("file:///android_asset/licenses.html"); return new AlertDialog.Builder(getActivity()).setTitle(R.string.about_licenses).setView(webView) .setPositiveButton(R.string.btn_confirm, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { dialog.dismiss(); } }).create(); } } /** * Dialog to open showing the "End User License Agreement". * * @author Xinyue Zhao */ public static void showEula(FragmentActivity activity) { FragmentManager fm = activity.getSupportFragmentManager(); FragmentTransaction ft = fm.beginTransaction(); Fragment prev = fm.findFragmentByTag("dialog_eula"); if (prev != null) { ft.remove(prev); } ft.addToBackStack(null); new EulaDialog().show(ft, "dialog_eula"); } /** * Dialog to open showing the "End User License Agreement". * * @author Xinyue Zhao */ public static class EulaDialog extends DialogFragment { @Override public Dialog onCreateDialog(Bundle savedInstanceState) { int padding = getResources().getDimensionPixelSize(R.dimen.padding_eula); TextView eulaTextView = new TextView(getActivity()); eulaTextView.setText(Html.fromHtml(getString(R.string.about_eula_legal_text))); eulaTextView.setMovementMethod(LinkMovementMethod.getInstance()); eulaTextView.setPadding(padding, padding, padding, padding); return new AlertDialog.Builder(getActivity()).setTitle(R.string.about_eula).setView(eulaTextView) .setPositiveButton(R.string.btn_ok, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { dialog.dismiss(); } }).create(); } } /** * Dialog to open showing the "End User License Agreement". * <p/> * When user does not agree, user can not use the application. * * @author Xinyue Zhao */ public static class EulaConfirmationDialog extends DialogFragment { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setCancelable(false); } @Override public Dialog onCreateDialog(Bundle savedInstanceState) { int padding = getResources().getDimensionPixelSize(R.dimen.padding_eula); TextView eulaTextView = new TextView(getActivity()); eulaTextView.setText(Html.fromHtml(getString(R.string.about_eula_legal_text))); eulaTextView.setBackgroundColor(getResources().getColor(R.color.common_white)); eulaTextView.setTextColor(getResources().getColor(R.color.common_black)); eulaTextView.setMovementMethod(LinkMovementMethod.getInstance()); eulaTextView.setPadding(padding, padding, padding, padding); return new AlertDialog.Builder(getActivity()).setTitle(R.string.about_eula).setView(eulaTextView) .setPositiveButton(R.string.btn_agree, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { Prefs.getInstance().setEULAOnceConfirmed(true); dismiss(); EventBus.getDefault().post(new EULAConfirmedEvent()); } }).setNegativeButton(R.string.btn_not_agree, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int whichButton) { Prefs.getInstance().setEULAOnceConfirmed(false); dismiss(); EventBus.getDefault().post(new EULARejectEvent()); } }).create(); } } }