Java tutorial
package org.schabi.newpipe; import android.app.Activity; import android.content.Context; import android.content.Intent; import android.graphics.Color; import android.net.Uri; import android.os.Build; import android.preference.PreferenceManager; import android.support.design.widget.Snackbar; import android.support.v4.app.NavUtils; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.os.Handler; import android.util.Log; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import org.json.JSONArray; import org.json.JSONObject; import org.schabi.newpipe.extractor.Parser; import java.io.PrintWriter; import java.io.StringWriter; import java.text.SimpleDateFormat; import java.util.Date; import java.util.List; import java.util.TimeZone; import java.util.Vector; /** * Created by Christian Schabesberger on 24.10.15. * <p> * Copyright (C) Christian Schabesberger 2016 <chris.schabesberger@mailbox.org> * ErrorActivity.java is part of NewPipe. * <p> * NewPipe is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * <p> * NewPipe is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * <p> * You should have received a copy of the GNU General Public License * along with NewPipe. If not, see <http://www.gnu.org/licenses/>. */ public class ErrorActivity extends AppCompatActivity { public static class ErrorInfo { public int userAction; public String request; public String serviceName; public int message; public static ErrorInfo make(int userAction, String serviceName, String request, int message) { ErrorInfo info = new ErrorInfo(); info.userAction = userAction; info.serviceName = serviceName; info.request = request; info.message = message; return info; } } public static final String TAG = ErrorActivity.class.toString(); public static final int SEARCHED = 0; public static final int REQUESTED_STREAM = 1; public static final int GET_SUGGESTIONS = 2; public static final int SOMETHING_ELSE = 3; public static final int USER_REPORT = 4; public static final String SEARCHED_STRING = "searched"; public static final String REQUESTED_STREAM_STRING = "requested stream"; public static final String GET_SUGGESTIONS_STRING = "get suggestions"; public static final String SOMETHING_ELSE_STRING = "something"; public static final String USER_REPORT_STRING = "user report"; public static final String ERROR_EMAIL_ADDRESS = "crashreport@newpipe.schabi.org"; public static final String ERROR_EMAIL_SUBJECT = "Exception in NewPipe " + BuildConfig.VERSION_NAME; private List<Exception> errorList; private ErrorInfo errorInfo; private Class returnActivity; private String currentTimeStamp; private String globIpRange; Thread globIpRangeThread = null; // views private TextView errorView; private EditText userCommentBox; private Button reportButton; private TextView infoView; private TextView errorMessageView; public static void reportError(final Context context, final List<Exception> el, final Class returnAcitivty, View rootView, final ErrorInfo errorInfo) { if (rootView != null) { Snackbar.make(rootView, R.string.error_snackbar_message, Snackbar.LENGTH_LONG) .setActionTextColor(Color.YELLOW) .setAction(R.string.error_snackbar_action, new View.OnClickListener() { @Override public void onClick(View v) { ActivityCommunicator ac = ActivityCommunicator.getCommunicator(); ac.errorList = el; ac.returnActivity = returnAcitivty; ac.errorInfo = errorInfo; Intent intent = new Intent(context, ErrorActivity.class); context.startActivity(intent); } }).show(); } else { ActivityCommunicator ac = ActivityCommunicator.getCommunicator(); ac.errorList = el; ac.returnActivity = returnAcitivty; ac.errorInfo = errorInfo; Intent intent = new Intent(context, ErrorActivity.class); context.startActivity(intent); } } public static void reportError(final Context context, final Exception e, final Class returnAcitivty, View rootView, final ErrorInfo errorInfo) { List<Exception> el = null; if (e != null) { el = new Vector<>(); el.add(e); } reportError(context, el, returnAcitivty, rootView, errorInfo); } // async call public static void reportError(Handler handler, final Context context, final Exception e, final Class returnAcitivty, final View rootView, final ErrorInfo errorInfo) { List<Exception> el = null; if (e != null) { el = new Vector<>(); el.add(e); } reportError(handler, context, el, returnAcitivty, rootView, errorInfo); } // async call public static void reportError(Handler handler, final Context context, final List<Exception> el, final Class returnAcitivty, final View rootView, final ErrorInfo errorInfo) { handler.post(new Runnable() { @Override public void run() { reportError(context, el, returnAcitivty, rootView, errorInfo); } }); } @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_error); getSupportActionBar().setDisplayHomeAsUpEnabled(true); ActivityCommunicator ac = ActivityCommunicator.getCommunicator(); errorList = ac.errorList; returnActivity = ac.returnActivity; errorInfo = ac.errorInfo; reportButton = (Button) findViewById(R.id.errorReportButton); userCommentBox = (EditText) findViewById(R.id.errorCommentBox); errorView = (TextView) findViewById(R.id.errorView); infoView = (TextView) findViewById(R.id.errorInfosView); errorMessageView = (TextView) findViewById(R.id.errorMessageView); errorView.setText(formErrorText(errorList)); //importand add gurumeditaion addGuruMeditaion(); currentTimeStamp = getCurrentTimeStamp(); buildInfo(errorInfo); reportButton.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent intent = new Intent(Intent.ACTION_SENDTO); intent.setData(Uri.parse("mailto:" + ERROR_EMAIL_ADDRESS)) .putExtra(Intent.EXTRA_SUBJECT, ERROR_EMAIL_SUBJECT) .putExtra(Intent.EXTRA_TEXT, buildJson()); startActivity(Intent.createChooser(intent, "Send Email")); } }); reportButton.setEnabled(false); globIpRangeThread = new Thread(new IpRagneRequester()); globIpRangeThread.start(); if (errorInfo.message != 0) { errorMessageView.setText(errorInfo.message); } else { errorMessageView.setVisibility(View.GONE); findViewById(R.id.messageWhatHappenedView).setVisibility(View.GONE); } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.error_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { int id = item.getItemId(); switch (id) { case android.R.id.home: goToReturnActivity(); break; case R.id.menu_item_share_error: { Intent intent = new Intent(); intent.setAction(Intent.ACTION_SEND); intent.putExtra(Intent.EXTRA_TEXT, buildJson()); intent.setType("text/plain"); startActivity(Intent.createChooser(intent, getString(R.string.share_dialog_title))); } break; } return false; } private static String getStackTrace(final Throwable throwable) { final StringWriter sw = new StringWriter(); final PrintWriter pw = new PrintWriter(sw, true); throwable.printStackTrace(pw); return sw.getBuffer().toString(); } private String formErrorText(List<Exception> el) { String text = ""; if (el != null) { for (Exception e : el) { text += "-------------------------------------\n" + getStackTrace(e); } } text += "-------------------------------------"; return text; } private void goToReturnActivity() { if (returnActivity == null) { super.onBackPressed(); } else { Intent intent; if (returnActivity != null && returnActivity.isAssignableFrom(Activity.class)) { intent = new Intent(this, returnActivity); } else { intent = new Intent(this, VideoItemListActivity.class); } intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP); NavUtils.navigateUpTo(this, intent); } } private void buildInfo(ErrorInfo info) { TextView infoLabelView = (TextView) findViewById(R.id.errorInfoLabelsView); TextView infoView = (TextView) findViewById(R.id.errorInfosView); String text = ""; infoLabelView.setText(getString(R.string.info_labels).replace("\\n", "\n")); text += getUserActionString(info.userAction) + "\n" + info.request + "\n" + getContentLangString() + "\n" + info.serviceName + "\n" + currentTimeStamp + "\n" + BuildConfig.VERSION_NAME + "\n" + getOsString(); infoView.setText(text); } private String buildJson() { JSONObject errorObject = new JSONObject(); try { errorObject.put("user_action", getUserActionString(errorInfo.userAction)) .put("request", errorInfo.request).put("content_language", getContentLangString()) .put("service", errorInfo.serviceName).put("version", BuildConfig.VERSION_NAME) .put("os", getOsString()).put("time", currentTimeStamp).put("ip_range", globIpRange); JSONArray exceptionArray = new JSONArray(); if (errorList != null) { for (Exception e : errorList) { exceptionArray.put(getStackTrace(e)); } } errorObject.put("exceptions", exceptionArray); errorObject.put("user_comment", userCommentBox.getText().toString()); return errorObject.toString(3); } catch (Exception e) { Log.e(TAG, "Error while erroring: Could not build json"); e.printStackTrace(); } return ""; } private String getUserActionString(int userAction) { switch (userAction) { case REQUESTED_STREAM: return REQUESTED_STREAM_STRING; case SEARCHED: return SEARCHED_STRING; case GET_SUGGESTIONS: return GET_SUGGESTIONS_STRING; case SOMETHING_ELSE: return SOMETHING_ELSE_STRING; case USER_REPORT: return USER_REPORT_STRING; default: return "Your description is in another castle."; } } private String getContentLangString() { return PreferenceManager.getDefaultSharedPreferences(this) .getString(this.getString(R.string.search_language_key), "none"); } private String getOsString() { String osBase = Build.VERSION.SDK_INT >= 23 ? Build.VERSION.BASE_OS : "Android"; return System.getProperty("os.name") + " " + (osBase.isEmpty() ? "Android" : osBase) + " " + Build.VERSION.RELEASE + " - " + Integer.toString(Build.VERSION.SDK_INT); } private void addGuruMeditaion() { //just an easter egg TextView sorryView = (TextView) findViewById(R.id.errorSorryView); String text = sorryView.getText().toString(); text += "\n" + getString(R.string.guru_meditation); sorryView.setText(text); } @Override public void onBackPressed() { //super.onBackPressed(); goToReturnActivity(); } public String getCurrentTimeStamp() { SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm"); df.setTimeZone(TimeZone.getTimeZone("GMT")); return df.format(new Date()); } private class IpRagneRequester implements Runnable { Handler h = new Handler(); public void run() { String ipRange = "none"; try { Downloader dl = new Downloader(); String ip = dl.download("https://ifcfg.me/ip"); ipRange = Parser.matchGroup1("([0-9]*\\.[0-9]*\\.)[0-9]*\\.[0-9]*", ip) + "0.0"; } catch (Exception e) { Log.d(TAG, "Error while error: could not get iprange"); e.printStackTrace(); } finally { h.post(new IpRageReturnRunnable(ipRange)); } } } private class IpRageReturnRunnable implements Runnable { String ipRange; public IpRageReturnRunnable(String ipRange) { this.ipRange = ipRange; } public void run() { globIpRange = ipRange; if (infoView != null) { String text = infoView.getText().toString(); text += "\n" + globIpRange; infoView.setText(text); reportButton.setEnabled(true); } } } }