Java tutorial
/* Copyright 2017 Andrew Dawson * * This file is a part of Tusky. * * This program 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. * * Tusky 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. * * You should have received a copy of the GNU General Public License along with Tusky; if not, * see <http://www.gnu.org/licenses>. */ package com.keylesspalace.tusky; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.drawable.Drawable; import android.net.Uri; import android.os.Bundle; import android.support.annotation.AttrRes; import android.support.annotation.Nullable; import android.support.design.widget.AppBarLayout; import android.support.design.widget.CollapsingToolbarLayout; import android.support.design.widget.FloatingActionButton; import android.support.design.widget.Snackbar; import android.support.design.widget.TabLayout; import android.support.v4.view.ViewCompat; import android.support.v4.view.ViewPager; import android.support.v7.app.ActionBar; import android.support.v7.widget.Toolbar; import android.text.method.LinkMovementMethod; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import com.keylesspalace.tusky.entity.Account; import com.keylesspalace.tusky.entity.Relationship; import com.pkmmte.view.CircularImageView; import com.squareup.picasso.Picasso; import java.text.NumberFormat; import java.util.ArrayList; import java.util.List; import butterknife.BindView; import butterknife.ButterKnife; import retrofit2.Call; import retrofit2.Callback; import retrofit2.Response; public class AccountActivity extends BaseActivity { private static final String TAG = "AccountActivity"; // logging tag private String accountId; private boolean following = false; private boolean blocking = false; private boolean muting = false; private boolean isSelf; private TabLayout tabLayout; private Account loadedAccount; @BindView(R.id.account_locked) ImageView accountLockedView; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_account); ButterKnife.bind(this); if (savedInstanceState != null) { accountId = savedInstanceState.getString("accountId"); } else { Intent intent = getIntent(); accountId = intent.getStringExtra("id"); } SharedPreferences preferences = getSharedPreferences(getString(R.string.preferences_file_key), Context.MODE_PRIVATE); String loggedInAccountId = preferences.getString("loggedInAccountId", null); final Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); ActionBar actionBar = getSupportActionBar(); if (actionBar != null) { actionBar.setTitle(null); actionBar.setDisplayHomeAsUpEnabled(true); actionBar.setDisplayShowHomeEnabled(true); } // Add a listener to change the toolbar icon color when it enters/exits its collapsed state. AppBarLayout appBarLayout = (AppBarLayout) findViewById(R.id.account_app_bar_layout); final CollapsingToolbarLayout collapsingToolbar = (CollapsingToolbarLayout) findViewById( R.id.collapsing_toolbar); appBarLayout.addOnOffsetChangedListener(new AppBarLayout.OnOffsetChangedListener() { @AttrRes int priorAttribute = R.attr.account_toolbar_icon_tint_uncollapsed; @Override public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) { @AttrRes int attribute; if (collapsingToolbar.getHeight() + verticalOffset < 2 * ViewCompat.getMinimumHeight(collapsingToolbar)) { attribute = R.attr.account_toolbar_icon_tint_collapsed; } else { attribute = R.attr.account_toolbar_icon_tint_uncollapsed; } if (attribute != priorAttribute) { priorAttribute = attribute; Context context = toolbar.getContext(); ThemeUtils.setDrawableTint(context, toolbar.getNavigationIcon(), attribute); ThemeUtils.setDrawableTint(context, toolbar.getOverflowIcon(), attribute); } } }); FloatingActionButton floatingBtn = (FloatingActionButton) findViewById(R.id.floating_btn); floatingBtn.hide(); CircularImageView avatar = (CircularImageView) findViewById(R.id.account_avatar); ImageView header = (ImageView) findViewById(R.id.account_header); avatar.setImageResource(R.drawable.avatar_default); header.setImageResource(R.drawable.account_header_default); obtainAccount(); if (!accountId.equals(loggedInAccountId)) { isSelf = false; obtainRelationships(); } else { /* Cause the options menu to update and instead show an options menu for when the * account being shown is their own account. */ isSelf = true; invalidateOptionsMenu(); } // Setup the tabs and timeline pager. AccountPagerAdapter adapter = new AccountPagerAdapter(getSupportFragmentManager(), this, accountId); String[] pageTitles = { getString(R.string.title_statuses), getString(R.string.title_follows), getString(R.string.title_followers) }; adapter.setPageTitles(pageTitles); ViewPager viewPager = (ViewPager) findViewById(R.id.pager); int pageMargin = getResources().getDimensionPixelSize(R.dimen.tab_page_margin); viewPager.setPageMargin(pageMargin); Drawable pageMarginDrawable = ThemeUtils.getDrawable(this, R.attr.tab_page_margin_drawable, R.drawable.tab_page_margin_dark); viewPager.setPageMarginDrawable(pageMarginDrawable); viewPager.setAdapter(adapter); tabLayout = (TabLayout) findViewById(R.id.tab_layout); tabLayout.setupWithViewPager(viewPager); for (int i = 0; i < tabLayout.getTabCount(); i++) { TabLayout.Tab tab = tabLayout.getTabAt(i); if (tab != null) { tab.setCustomView(adapter.getTabView(i, tabLayout)); } } } private void obtainAccount() { mastodonAPI.account(accountId).enqueue(new Callback<Account>() { @Override public void onResponse(Call<Account> call, retrofit2.Response<Account> response) { if (response.isSuccessful()) { onObtainAccountSuccess(response.body()); } else { onObtainAccountFailure(); } } @Override public void onFailure(Call<Account> call, Throwable t) { onObtainAccountFailure(); } }); } @Override protected void onSaveInstanceState(Bundle outState) { outState.putString("accountId", accountId); super.onSaveInstanceState(outState); } private void onObtainAccountSuccess(Account account) { loadedAccount = account; TextView username = (TextView) findViewById(R.id.account_username); TextView displayName = (TextView) findViewById(R.id.account_display_name); TextView note = (TextView) findViewById(R.id.account_note); CircularImageView avatar = (CircularImageView) findViewById(R.id.account_avatar); ImageView header = (ImageView) findViewById(R.id.account_header); String usernameFormatted = String.format(getString(R.string.status_username_format), account.username); username.setText(usernameFormatted); displayName.setText(account.getDisplayName()); note.setText(account.note); note.setLinksClickable(true); note.setMovementMethod(LinkMovementMethod.getInstance()); if (account.locked) { accountLockedView.setVisibility(View.VISIBLE); } else { accountLockedView.setVisibility(View.GONE); } Picasso.with(this).load(account.avatar).placeholder(R.drawable.avatar_default) .error(R.drawable.avatar_error).into(avatar); Picasso.with(this).load(account.header).placeholder(R.drawable.account_header_missing).into(header); NumberFormat nf = NumberFormat.getInstance(); // Add counts to the tabs in the TabLayout. String[] counts = { nf.format(Integer.parseInt(account.statusesCount)), nf.format(Integer.parseInt(account.followingCount)), nf.format(Integer.parseInt(account.followersCount)), }; for (int i = 0; i < tabLayout.getTabCount(); i++) { TabLayout.Tab tab = tabLayout.getTabAt(i); if (tab != null) { View view = tab.getCustomView(); if (view != null) { TextView total = (TextView) view.findViewById(R.id.total); total.setText(counts[i]); } } } } private void onObtainAccountFailure() { Snackbar.make(tabLayout, R.string.error_generic, Snackbar.LENGTH_LONG) .setAction(R.string.action_retry, new View.OnClickListener() { @Override public void onClick(View v) { obtainAccount(); } }).show(); } private void obtainRelationships() { List<String> ids = new ArrayList<>(1); ids.add(accountId); mastodonAPI.relationships(ids).enqueue(new Callback<List<Relationship>>() { @Override public void onResponse(Call<List<Relationship>> call, retrofit2.Response<List<Relationship>> response) { if (response.isSuccessful()) { Relationship relationship = response.body().get(0); onObtainRelationshipsSuccess(relationship.following, relationship.blocking, relationship.muting); } else { onObtainRelationshipsFailure(new Exception(response.message())); } } @Override public void onFailure(Call<List<Relationship>> call, Throwable t) { onObtainRelationshipsFailure((Exception) t); } }); } private void onObtainRelationshipsSuccess(boolean following, boolean blocking, boolean muting) { this.following = following; this.blocking = blocking; this.muting = muting; if (!following || !blocking || !muting) { invalidateOptionsMenu(); } updateButtons(); } private void updateFollowButton(FloatingActionButton button) { if (following) { button.setImageResource(R.drawable.ic_person_minus_24px); button.setContentDescription(getString(R.string.action_unfollow)); } else { button.setImageResource(R.drawable.ic_person_add_24dp); button.setContentDescription(getString(R.string.action_follow)); } } private void updateButtons() { invalidateOptionsMenu(); final FloatingActionButton floatingBtn = (FloatingActionButton) findViewById(R.id.floating_btn); if (!isSelf && !blocking) { floatingBtn.show(); updateFollowButton(floatingBtn); floatingBtn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { follow(accountId); updateFollowButton(floatingBtn); } }); } } private void onObtainRelationshipsFailure(Exception exception) { Log.e(TAG, "Could not obtain relationships. " + exception.getMessage()); } @Override public boolean onCreateOptionsMenu(Menu menu) { getMenuInflater().inflate(R.menu.account_toolbar, menu); return super.onCreateOptionsMenu(menu); } @Override public boolean onPrepareOptionsMenu(Menu menu) { if (!isSelf) { MenuItem follow = menu.findItem(R.id.action_follow); String title; if (following) { title = getString(R.string.action_unfollow); } else { title = getString(R.string.action_follow); } follow.setTitle(title); MenuItem block = menu.findItem(R.id.action_block); if (blocking) { title = getString(R.string.action_unblock); } else { title = getString(R.string.action_block); } block.setTitle(title); MenuItem mute = menu.findItem(R.id.action_mute); if (muting) { title = getString(R.string.action_unmute); } else { title = getString(R.string.action_mute); } mute.setTitle(title); } else { // It shouldn't be possible to block or follow yourself. menu.removeItem(R.id.action_follow); menu.removeItem(R.id.action_block); menu.removeItem(R.id.action_mute); } return super.onPrepareOptionsMenu(menu); } private void follow(final String id) { Callback<Relationship> cb = new Callback<Relationship>() { @Override public void onResponse(Call<Relationship> call, retrofit2.Response<Relationship> response) { if (response.isSuccessful()) { following = response.body().following; // TODO: display message/indicator when "requested" is true (i.e. when the follow is awaiting approval) updateButtons(); } else { onFollowFailure(id); } } @Override public void onFailure(Call<Relationship> call, Throwable t) { onFollowFailure(id); } }; if (following) { mastodonAPI.unfollowAccount(id).enqueue(cb); } else { mastodonAPI.followAccount(id).enqueue(cb); } } private void onFollowFailure(final String id) { View.OnClickListener listener = new View.OnClickListener() { @Override public void onClick(View v) { follow(id); } }; View anyView = findViewById(R.id.activity_account); Snackbar.make(anyView, R.string.error_generic, Snackbar.LENGTH_LONG) .setAction(R.string.action_retry, listener).show(); } private void block(final String id) { Callback<Relationship> cb = new Callback<Relationship>() { @Override public void onResponse(Call<Relationship> call, retrofit2.Response<Relationship> response) { if (response.isSuccessful()) { blocking = response.body().blocking; updateButtons(); } else { onBlockFailure(id); } } @Override public void onFailure(Call<Relationship> call, Throwable t) { onBlockFailure(id); } }; if (blocking) { mastodonAPI.unblockAccount(id).enqueue(cb); } else { mastodonAPI.blockAccount(id).enqueue(cb); } } private void onBlockFailure(final String id) { View.OnClickListener listener = new View.OnClickListener() { @Override public void onClick(View v) { block(id); } }; View anyView = findViewById(R.id.activity_account); Snackbar.make(anyView, R.string.error_generic, Snackbar.LENGTH_LONG) .setAction(R.string.action_retry, listener).show(); } private void mute(final String id) { Callback<Relationship> cb = new Callback<Relationship>() { @Override public void onResponse(Call<Relationship> call, Response<Relationship> response) { if (response.isSuccessful()) { muting = response.body().muting; updateButtons(); } else { onMuteFailure(id); } } @Override public void onFailure(Call<Relationship> call, Throwable t) { onMuteFailure(id); } }; if (muting) { mastodonAPI.unmuteAccount(id).enqueue(cb); } else { mastodonAPI.muteAccount(id).enqueue(cb); } } private void onMuteFailure(final String id) { View.OnClickListener listener = new View.OnClickListener() { @Override public void onClick(View v) { mute(id); } }; View anyView = findViewById(R.id.activity_account); Snackbar.make(anyView, R.string.error_generic, Snackbar.LENGTH_LONG) .setAction(R.string.action_retry, listener).show(); } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case android.R.id.home: { onBackPressed(); return true; } case R.id.action_mention: { if (loadedAccount == null) { // If the account isn't loaded yet, eat the input. return false; } Intent intent = new Intent(this, ComposeActivity.class); intent.putExtra("mentioned_usernames", new String[] { loadedAccount.username }); startActivity(intent); return true; } case R.id.action_open_in_web: { if (loadedAccount == null) { // If the account isn't loaded yet, eat the input. return false; } Uri uri = Uri.parse(loadedAccount.url); Intent intent = new Intent(Intent.ACTION_VIEW, uri); startActivity(intent); return true; } case R.id.action_follow: { follow(accountId); return true; } case R.id.action_block: { block(accountId); return true; } case R.id.action_mute: { mute(accountId); return true; } } return super.onOptionsItemSelected(item); } }