Java tutorial
/* * Copyright (C) 2015 IMDEA Networks * * 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 org.imdea.panel; import android.app.AlertDialog; import android.app.FragmentManager; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.SharedPreferences; import android.os.Bundle; import android.preference.PreferenceManager; import android.support.v4.app.FragmentActivity; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.inputmethod.InputMethodManager; import android.widget.AdapterView; import android.widget.Button; import android.widget.EditText; import android.widget.ListView; import android.widget.TextView; import org.imdea.panel.Database.BtMessage; import org.imdea.panel.Database.DBHelper; import org.imdea.panel.Services.mqtt.mqttService; import org.imdea.panel.adapter.ItemAdapter; import java.util.ArrayList; public class showMessages extends FragmentActivity { public static ListView listv; public static Button send_btn; public static EditText text_field; public static ArrayList<BtMessage> messages; public static String tag; public static ItemAdapter adapter; public static SharedPreferences SP; public FragmentManager fm; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_show_messages); tag = getIntent().getExtras().getString("tag"); messages = DBHelper.recoverMessagesByTag(Global.db, tag); setTitle(tag); fm = getFragmentManager(); getActionBar().setDisplayHomeAsUpEnabled(true); getActionBar().setDisplayShowHomeEnabled(true); SP = PreferenceManager.getDefaultSharedPreferences(this); listv = (ListView) findViewById(R.id.listViewM); send_btn = (Button) findViewById(R.id.btnSend); text_field = (EditText) findViewById(R.id.inputMsg); send_btn.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { String text = text_field.getText().toString(); if (!text.isEmpty()) { text = text.replace("\n", " "); BtMessage item = new BtMessage(text, SP.getString("username_field", "anonymous")); Log.w("NEW MSG", item.toJson().toString()); item.isMine = true; item.setTag(tag); DBHelper.insertMessage(Global.db, item); text_field.setText(""); if (Global.mqtt) mqttService.sendToPeers(item); sendBroadcast(new Intent("org.imdea.panel.MESSAGE_WRITTEN")); TagsFragment.refresh(); } InputMethodManager inputManager = (InputMethodManager) getSystemService( Context.INPUT_METHOD_SERVICE); inputManager.hideSoftInputFromWindow(getCurrentFocus().getWindowToken(), InputMethodManager.HIDE_NOT_ALWAYS); refresh(); } }); adapter = new ItemAdapter(this, messages) { public void onEntrada(Object item, View view) { TextView text_msg = (TextView) view.findViewById(R.id.msg); text_msg.setText(((BtMessage) item).msg); TextView text_user = (TextView) view.findViewById(R.id.name); text_user.setText(((BtMessage) item).user); } }; listv.setAdapter(adapter); listv.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() { public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) { final BtMessage listItem = (BtMessage) listv.getItemAtPosition(position); Log.i("TAG_FRAGMENT", "Long Click on " + listItem.toString()); AlertDialog.Builder builder = new AlertDialog.Builder(showMessages.this); final CharSequence[] shareItems = { "Delete", "Information" }; builder.setCancelable(true).setItems(shareItems, new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { if (id == 0) { DBHelper.deleteMessage(Global.db, listItem); //Messages.deleteMessage(listItem); refresh(); } else { Intent intent = new Intent(getBaseContext(), InfoActivity.class); intent.putExtra("HASH", listItem.toHash()); startActivity(intent); } } }); /*builder.setCancelable(true).setPositiveButton("DELETE", new DialogInterface.OnClickListener() { public void onClick(DialogInterface dialog, int id) { DBHelper.deleteMessage(MainActivity.db,(BtMessage) listItem); refresh(); } });*/ AlertDialog alert = builder.create(); alert.show(); return false; } }); } public static void refresh() { if (messages != null) { messages.clear(); messages.addAll(DBHelper.recoverMessagesByTag(Global.db, tag)); } else { messages = DBHelper.recoverMessagesByTag(Global.db, tag); } adapter.notifyDataSetChanged(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.menu_show_messages, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { // Handle action bar item clicks here. The action bar will // automatically handle clicks on the Home/Up button, so long // as you specify a parent activity in AndroidManifest.xml. switch (item.getItemId()) { case R.id.action_newMsg: Bundle args = new Bundle(); args.putBoolean("isTag", false); args.putString("Tag", tag); InputFragment newMsgDialog = new InputFragment(); newMsgDialog.setArguments(args); newMsgDialog.show(getSupportFragmentManager(), "fragment_edit_name"); return true; case android.R.id.home: this.finish(); return true; } return super.onOptionsItemSelected(item); } }