Java tutorial
/* * Copyright 2012 Javier Prez Pacheco and Francisco Daz Rodriguez * TweetTopics 2.0 * javielinux@gmail.com * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package com.javielinux.tweettopics2; import android.app.AlertDialog; import android.content.DialogInterface; import android.content.Intent; import android.graphics.Color; import android.graphics.Shader; import android.graphics.drawable.BitmapDrawable; import android.os.Bundle; import android.view.View; import android.widget.*; import com.android.dataframework.DataFramework; import com.android.dataframework.Entity; import com.javielinux.adapters.RowUserListsAdapter; import com.javielinux.adapters.UsersAdapter; import com.javielinux.api.APIDelegate; import com.javielinux.api.APITweetTopics; import com.javielinux.api.loaders.GetUserListLoader; import com.javielinux.api.request.GetUserListRequest; import com.javielinux.api.response.BaseResponse; import com.javielinux.api.response.ErrorResponse; import com.javielinux.api.response.GetUserListResponse; import com.javielinux.preferences.Preferences; import com.javielinux.utils.ImageUtils; import com.javielinux.utils.Utils; import twitter4j.UserList; import java.io.File; import java.util.ArrayList; public class UserListsSelectorActivity extends BaseActivity implements APIDelegate<BaseResponse> { public static String KEY_ACTIVE_USER_ID = "KEY_ACTIVE_USER_ID"; public static String KEY_LIST_ID = "KEY_LIST_ID"; private RowUserListsAdapter userListsAdapter; private ArrayList<UserList> userListArrayList; private Entity userEntity; private long nextCursor; private boolean loadingMoreUserList; private ThemeManager themeManager; private LinearLayout mLayoutBackgroundApp; private LinearLayout viewNoLists; private LinearLayout viewLoading; private LinearLayout viewNoInternet; private GridView viewUserLists; private RelativeLayout viewUserInfo; private ImageView userIcon; private TextView userFullname; private TextView userName; private RelativeLayout layoutActionBar; private TextView titlePage; public void refreshTheme() { boolean hasWallpaper = false; File f = new File(Preferences.IMAGE_WALLPAPER); if (f.exists()) { try { BitmapDrawable bmp = (BitmapDrawable) BitmapDrawable.createFromPath(Preferences.IMAGE_WALLPAPER); bmp.setTileModeXY(Shader.TileMode.REPEAT, Shader.TileMode.REPEAT); mLayoutBackgroundApp.setBackgroundDrawable(bmp); hasWallpaper = true; } catch (OutOfMemoryError e) { e.printStackTrace(); } } if (!hasWallpaper) { mLayoutBackgroundApp.setBackgroundColor( Color.parseColor("#" + themeManager.getStringColor("color_background_new_status"))); } themeManager.setColors(); layoutActionBar.setBackgroundDrawable( ImageUtils.createBackgroundDrawable(this, themeManager.getColor("color_top_bar"), false, 0)); titlePage.setTextColor(themeManager.getColor("color_indicator_text")); titlePage.setTextSize(getResources().getDimension(R.dimen.text_size_title_page)); } @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); userEntity = null; try { DataFramework.getInstance().open(this, Utils.packageName); userEntity = DataFramework.getInstance().getTopEntity("users", "", ""); } catch (Exception e) { e.printStackTrace(); } if (userEntity == null) { Utils.showMessage(this, R.string.error_general); finish(); } nextCursor = -1; loadingMoreUserList = false; themeManager = new ThemeManager(this); themeManager.setTheme(); setContentView(R.layout.userlistsselector_activity); mLayoutBackgroundApp = (LinearLayout) this.findViewById(R.id.user_lists_parent); layoutActionBar = (RelativeLayout) findViewById(R.id.user_list_bar_action); titlePage = (TextView) this.findViewById(R.id.user_list_bar_title); refreshTheme(); viewNoLists = (LinearLayout) this.findViewById(R.id.user_lists_view_no_lists); viewLoading = (LinearLayout) this.findViewById(R.id.user_lists_view_loading); viewNoInternet = (LinearLayout) this.findViewById(R.id.user_lists_view_no_internet); viewUserLists = (GridView) this.findViewById(R.id.grid_userlist); viewUserInfo = (RelativeLayout) this.findViewById(R.id.user_info); userIcon = (ImageView) this.findViewById(R.id.user_icon); userFullname = (TextView) this.findViewById(R.id.user_fullname); userName = (TextView) this.findViewById(R.id.user_name); viewUserInfo.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View view) { ArrayList<Entity> userEntityList = DataFramework.getInstance().getEntityList("users", "service is null or service = \"twitter.com\""); final UsersAdapter adapter = new UsersAdapter(UserListsSelectorActivity.this, userEntityList); AlertDialog builder = new AlertDialog.Builder(UserListsSelectorActivity.this).setCancelable(true) .setTitle(R.string.users).setAdapter(adapter, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { userEntity = adapter.getItem(which); loadUserInfo(); reload(); } }).setNegativeButton(R.string.alert_dialog_cancel, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialogInterface, int i) { } }).create(); builder.show(); } }); findViewById(R.id.user_list_bar_icon).setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { UserListsSelectorActivity.this.finish(); } }); userListArrayList = new ArrayList<UserList>(); userListsAdapter = new RowUserListsAdapter(this, userListArrayList); GridView gridUserList = (GridView) this.findViewById(R.id.grid_userlist); gridUserList.setAdapter(userListsAdapter); gridUserList.setOnItemClickListener(new AdapterView.OnItemClickListener() { @Override public void onItemClick(AdapterView<?> av, View v, int pos, long id) { UserList userList = userListsAdapter.getItem(pos); Intent intent = getIntent(); intent.putExtra(KEY_ACTIVE_USER_ID, userEntity.getId()); intent.putExtra(KEY_LIST_ID, userList.getId()); setResult(RESULT_OK, intent); finish(); } }); gridUserList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { @Override public boolean onItemLongClick(AdapterView<?> av, View v, int pos, long id) { return true; } }); loadUserInfo(); reload(); } private void loadUserInfo() { if (userEntity != null) { userIcon.setImageBitmap(ImageUtils.getBitmapAvatar(userEntity.getId(), Utils.AVATAR_LARGE)); userFullname.setText(userEntity.getString("fullname")); userName.setText(userEntity.getString("name")); } } @Override protected void onDestroy() { super.onDestroy(); DataFramework.getInstance().close(); } @Override public void onError(ErrorResponse error) { error.getError().printStackTrace(); showNoInternet(); Utils.showMessage(this, error.getMsgError()); } @Override protected void onResume() { super.onResume(); } @Override public void onResults(BaseResponse response) { userListArrayList.clear(); GetUserListResponse result = (GetUserListResponse) response; userListArrayList.addAll(result.getUserListArrayList()); userListsAdapter.notifyDataSetChanged(); if (userListsAdapter.getCount() == 0) { showNoLists(); } else { showUserLists(); viewUserLists.setSelection(userListsAdapter.getCount() - 1); } } public void reload() { showLoading(); GetUserListRequest getUserListRequest = new GetUserListRequest(userEntity.getId(), userEntity.getString("name"), GetUserListLoader.OWN_LISTS, -1); APITweetTopics.execute(this, getSupportLoaderManager(), this, getUserListRequest); } public void showNoLists() { viewNoLists.setVisibility(View.VISIBLE); viewLoading.setVisibility(View.GONE); viewNoInternet.setVisibility(View.GONE); viewUserLists.setVisibility(View.GONE); } public void showLoading() { viewNoLists.setVisibility(View.GONE); viewLoading.setVisibility(View.VISIBLE); viewNoInternet.setVisibility(View.GONE); viewUserLists.setVisibility(View.GONE); } public void showNoInternet() { viewNoLists.setVisibility(View.GONE); viewLoading.setVisibility(View.GONE); viewNoInternet.setVisibility(View.VISIBLE); viewUserLists.setVisibility(View.GONE); } public void showUserLists() { viewNoLists.setVisibility(View.GONE); viewLoading.setVisibility(View.GONE); viewNoInternet.setVisibility(View.GONE); viewUserLists.setVisibility(View.VISIBLE); } }