Android Open Source - hpush About Dialog Fragment

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License

The source code is released under:
MIT License
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Java Source Code

package com.hpush.app.fragments;
//  w  w  w  .  java  2 s.c  om
import android.app.AlertDialog;
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.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.webkit.WebView;
import android.widget.TextView;

import com.hpush.R;
import com.hpush.bus.EULAConfirmedEvent;
import com.hpush.bus.EULARejectEvent;
import com.hpush.utils.Prefs;

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 android.content.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);
    TextView aboutBodyView = (TextView) layoutInflater.inflate(R.layout.fragment_dialog_about, null);
    aboutBodyView.setText(aboutBody);
    aboutBodyView.setMovementMethod(new LinkMovementMethod());

    return new AlertDialog.Builder(getActivity()).setTitle(R.string.lbl_about).setView(aboutBodyView)
        .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(getActivity().getApplication()).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(getActivity().getApplication()).setEULAOnceConfirmed(false);
              dismiss();
              EventBus.getDefault().post(new EULARejectEvent());
            }
          }).create();
    }
  }

}
Java Source Code List
