Java tutorial
/* * This is the source code of Telegram for Android v. 3.x.x. * It is licensed under GNU GPL v. 2 or later. * You should have received a copy of the license in this archive (see LICENSE). * * Copyright Nikolai Kudashov, 2013-2016. */ package org.telegram.ui; import android.content.Context; import android.os.Bundle; import android.support.annotation.NonNull; import android.support.v4.content.ContextCompat; import android.text.Spannable; import android.text.SpannableStringBuilder; import android.text.Spanned; import android.text.method.LinkMovementMethod; import android.util.TypedValue; import android.view.Gravity; import android.view.MotionEvent; import android.view.Surface; import android.view.View; import android.view.ViewTreeObserver; import android.view.WindowManager; import android.widget.FrameLayout; import android.widget.ImageView; import android.widget.LinearLayout; import android.widget.TextView; import org.telegram.messenger.AndroidUtilities; import org.telegram.messenger.FileLog; import org.telegram.messenger.LocaleController; import org.telegram.messenger.ApplicationLoader; import org.telegram.messenger.Utilities; import org.telegram.tgnet.TLRPC; import org.telegram.messenger.MessagesController; import org.telegram.messenger.R; import org.telegram.ui.ActionBar.ActionBar; import org.telegram.ui.ActionBar.BaseFragment; import org.telegram.ui.Components.IdenticonDrawable; import org.telegram.ui.Components.LayoutHelper; import org.telegram.ui.ActionBar.Theme; import org.telegram.ui.Components.URLSpanReplacement; public class IdenticonActivity extends BaseFragment { private int chat_id; private static class LinkMovementMethodMy extends LinkMovementMethod { @Override public boolean onTouchEvent(@NonNull TextView widget, @NonNull Spannable buffer, @NonNull MotionEvent event) { try { return super.onTouchEvent(widget, buffer, event); } catch (Exception e) { FileLog.e("tmessages", e); } return false; } } public IdenticonActivity(Bundle args) { super(args); } @Override public boolean onFragmentCreate() { chat_id = getArguments().getInt("chat_id"); return super.onFragmentCreate(); } @Override public View createView(Context context) { actionBar.setBackButtonImage(R.drawable.ic_ab_back); actionBar.setAllowOverlayTitle(true); actionBar.setTitle(LocaleController.getString("EncryptionKey", R.string.EncryptionKey)); actionBar.setActionBarMenuOnItemClick(new ActionBar.ActionBarMenuOnItemClick() { @Override public void onItemClick(int id) { if (id == -1) { finishFragment(); } } }); fragmentView = new LinearLayout(context); LinearLayout linearLayout = (LinearLayout) fragmentView; linearLayout.setOrientation(LinearLayout.VERTICAL); linearLayout.setWeightSum(100); linearLayout.setBackgroundColor(ContextCompat.getColor(context, R.color.card_background)); fragmentView.setOnTouchListener(new View.OnTouchListener() { @Override public boolean onTouch(View v, MotionEvent event) { return true; } }); FrameLayout frameLayout = new FrameLayout(context); frameLayout.setPadding(AndroidUtilities.dp(20), AndroidUtilities.dp(20), AndroidUtilities.dp(20), AndroidUtilities.dp(20)); linearLayout.addView(frameLayout, LayoutHelper.createLinear(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT, 50.0f)); ImageView identiconView = new ImageView(context); identiconView.setScaleType(ImageView.ScaleType.FIT_XY); frameLayout.addView(identiconView, LayoutHelper.createFrame(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT)); frameLayout = new FrameLayout(context); frameLayout.setBackgroundColor(ContextCompat.getColor(context, R.color.background)); frameLayout.setPadding(AndroidUtilities.dp(10), 0, AndroidUtilities.dp(10), AndroidUtilities.dp(10)); linearLayout.addView(frameLayout, LayoutHelper.createLinear(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT, 50.0f)); TextView textView = new TextView(context); textView.setTextColor(ContextCompat.getColor(context, R.color.secondary_text)); textView.setTextSize(TypedValue.COMPLEX_UNIT_DIP, 16); textView.setLinksClickable(true); textView.setClickable(true); textView.setMovementMethod(new LinkMovementMethodMy()); //textView.setAutoLinkMask(Linkify.WEB_URLS); textView.setLinkTextColor(Theme.MSG_LINK_TEXT_COLOR); textView.setGravity(Gravity.CENTER); frameLayout.addView(textView, LayoutHelper.createFrame(LayoutHelper.MATCH_PARENT, LayoutHelper.MATCH_PARENT)); TLRPC.EncryptedChat encryptedChat = MessagesController.getInstance().getEncryptedChat(chat_id); if (encryptedChat != null) { IdenticonDrawable drawable = new IdenticonDrawable(); identiconView.setImageDrawable(drawable); drawable.setEncryptedChat(encryptedChat); TLRPC.User user = MessagesController.getInstance().getUser(encryptedChat.user_id); SpannableStringBuilder hash = new SpannableStringBuilder(); if (encryptedChat.key_hash.length > 16) { String hex = Utilities.bytesToHex(encryptedChat.key_hash); for (int a = 0; a < 32; a++) { if (a != 0) { if (a % 8 == 0) { hash.append('\n'); } else if (a % 4 == 0) { hash.append(' '); } } hash.append(hex.substring(a * 2, a * 2 + 2)); hash.append(' '); } hash.append("\n\n"); } hash.append(AndroidUtilities.replaceTags(LocaleController.formatString("EncryptionKeyDescription", R.string.EncryptionKeyDescription, user.first_name, user.first_name))); final String url = "telegram.org"; int index = hash.toString().indexOf(url); if (index != -1) { hash.setSpan( new URLSpanReplacement( LocaleController.getString("EncryptionKeyLink", R.string.EncryptionKeyLink)), index, index + url.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE); } textView.setText(hash); } return fragmentView; } @Override public void onConfigurationChanged(android.content.res.Configuration newConfig) { super.onConfigurationChanged(newConfig); fixLayout(); } @Override public void onResume() { super.onResume(); fixLayout(); } private void fixLayout() { ViewTreeObserver obs = fragmentView.getViewTreeObserver(); obs.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() { @Override public boolean onPreDraw() { if (fragmentView == null) { return true; } fragmentView.getViewTreeObserver().removeOnPreDrawListener(this); LinearLayout layout = (LinearLayout) fragmentView; WindowManager manager = (WindowManager) ApplicationLoader.applicationContext .getSystemService(Context.WINDOW_SERVICE); int rotation = manager.getDefaultDisplay().getRotation(); if (rotation == Surface.ROTATION_270 || rotation == Surface.ROTATION_90) { layout.setOrientation(LinearLayout.HORIZONTAL); } else { layout.setOrientation(LinearLayout.VERTICAL); } fragmentView.setPadding(fragmentView.getPaddingLeft(), 0, fragmentView.getPaddingRight(), fragmentView.getPaddingBottom()); return true; } }); } }