Java tutorial
/* * Copyright (C) 2013 The Android Open Source Project * * 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.wordpress.bennthomsen.ble_uart_remote; import android.app.Activity; import android.app.AlertDialog; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.BroadcastReceiver; import android.content.ComponentName; import android.content.Context; import android.content.DialogInterface; import android.content.Intent; import android.content.IntentFilter; import android.content.ServiceConnection; import android.content.res.Configuration; import android.nfc.NdefMessage; import android.nfc.NdefRecord; import android.nfc.NfcAdapter; import android.os.Bundle; import android.os.IBinder; import android.os.Parcelable; import android.support.v4.content.LocalBroadcastManager; import android.util.Log; import android.view.MotionEvent; import android.view.View; import android.widget.Button; import android.widget.TextView; import android.widget.Toast; import java.nio.charset.Charset; import java.text.DateFormat; import java.util.Date; public class MainActivity extends Activity implements View.OnTouchListener { private static final int REQUEST_SELECT_DEVICE = 1; private static final int REQUEST_ENABLE_BT = 2; public static final int REQUEST_SELECT_RECIPE = 3; public static final String TAG = "nRFUART"; private static final int UART_PROFILE_CONNECTED = 20; private static final int UART_PROFILE_DISCONNECTED = 21; private static final int OPERATION = 0x00; private static final int NO_OPERATION = 0x00; private static final int COMMAND = 0x01; private static final int PROGRAM = 0x02; private static final int PRESSED = 0x01; private static final int NOT_PRESSED = 0x00; private static final int TIME_MORE = 0x04; private static final int TIME_LESS = 0x05; private static final int DOUGH_QNT = 0x02; private static final int INIT_STOP = 0x06; private static final int OPTIONS = 0x01; private static final int COLOR = 0x03; private static final int TEST_LED = 0x07; byte[] value; private boolean isConnected; private Bakery bakery; private Recipe recipe; private int mState = UART_PROFILE_DISCONNECTED; private UartService mService = null; private BluetoothDevice mDevice = null; private BluetoothAdapter mBtAdapter = null; private Button btnConnectDisconnect, time_more, time_less, dough_qnt, options, color, init_stop, startRecipe; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mBtAdapter = BluetoothAdapter.getDefaultAdapter(); if (mBtAdapter == null) { Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show(); finish(); return; } btnConnectDisconnect = (Button) findViewById(R.id.btn_select); time_more = (Button) findViewById(R.id.button_time_more); time_less = (Button) findViewById(R.id.button_time_less); dough_qnt = (Button) findViewById(R.id.button_dough_qnt); options = (Button) findViewById(R.id.button_options); color = (Button) findViewById(R.id.button_color); init_stop = (Button) findViewById(R.id.button_init_stop); startRecipe = (Button) findViewById(R.id.startRecipesBookSelectionActivity); // dont allow the user click on these buttons if not connected and GATT service discovered. time_more.setEnabled(false); time_less.setEnabled(false); dough_qnt.setEnabled(false); options.setEnabled(false); color.setEnabled(false); init_stop.setEnabled(false); isConnected = false; service_init(); // Handler Disconnect & Connect button btnConnectDisconnect.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { if (!mBtAdapter.isEnabled()) { Log.i(TAG, "onClick - BT not enabled yet"); Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, REQUEST_ENABLE_BT); } else { if (btnConnectDisconnect.getText().equals("Connect")) { //Connect button pressed, open DeviceListActivity class, with popup windows that scan for devices Intent newIntent = new Intent(MainActivity.this, DeviceListActivity.class); startActivityForResult(newIntent, REQUEST_SELECT_DEVICE); } else { //Disconnect button pressed if (mDevice != null) { mService.disconnect(); } } } } }); //Handler startRecipe startRecipe.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { Intent booksIntent = new Intent(MainActivity.this, SelectionListActivity.class); booksIntent.putExtra("file", "recipes_books"); booksIntent.putExtra("level", "books"); booksIntent.putExtra("list_title", "Livros de receitas"); booksIntent.putExtra("isConnected", isConnected); startActivityForResult(booksIntent, REQUEST_SELECT_RECIPE); } }); time_more.setOnTouchListener(this); time_less.setOnTouchListener(this); options.setOnTouchListener(this); dough_qnt.setOnTouchListener(this); color.setOnTouchListener(this); init_stop.setOnTouchListener(this); } //UART service connected/disconnected private ServiceConnection mServiceConnection = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder rawBinder) { mService = ((UartService.LocalBinder) rawBinder).getService(); Log.d(TAG, "onServiceConnected mService= " + mService); if (!mService.initialize()) { Log.e(TAG, "Unable to initialize Bluetooth"); finish(); } nfc_init(); // only check for NFC after ServiceConnection is finished; } public void onServiceDisconnected(ComponentName classname) { } }; private final BroadcastReceiver UARTStatusChangeReceiver = new BroadcastReceiver() { public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (action.equals(UartService.ACTION_GATT_CONNECTED)) { runOnUiThread(new Runnable() { public void run() { String currentDateTimeString = DateFormat.getTimeInstance().format(new Date()); Log.d(TAG, "UART_CONNECT_MSG"); btnConnectDisconnect.setText("Disconnect"); ((TextView) findViewById(R.id.deviceName)).setText(mDevice.getName() + " - ready"); mState = UART_PROFILE_CONNECTED; isConnected = true; } }); } if (action.equals(UartService.ACTION_GATT_DISCONNECTED)) { runOnUiThread(new Runnable() { public void run() { String currentDateTimeString = DateFormat.getTimeInstance().format(new Date()); Log.d(TAG, "UART_DISCONNECT_MSG"); btnConnectDisconnect.setText("Connect"); time_more.setEnabled(false); time_less.setEnabled(false); dough_qnt.setEnabled(false); options.setEnabled(false); color.setEnabled(false); init_stop.setEnabled(false); ((TextView) findViewById(R.id.deviceName)).setText("Not Connected"); mState = UART_PROFILE_DISCONNECTED; mService.disconnect(); isConnected = false; } }); } if (action.equals(UartService.ACTION_GATT_SERVICES_DISCOVERED)) { // mService.enableTXNotification(); time_more.setEnabled(true); time_less.setEnabled(true); dough_qnt.setEnabled(true); options.setEnabled(true); color.setEnabled(true); init_stop.setEnabled(true); } if (action.equals(UartService.DEVICE_DOES_NOT_SUPPORT_UART)) { showMessage("Device doesn't support UART. Disconnecting"); mService.disconnect(); } } }; /* Known bugs of nfc_init: - tap the NFC when app is running breaks the software - Does not check if the device is there since .getRemoteDevice(deviceAddress) does not do it - sometimes mDevice.getName() is returning null if the app connects to the machine before any manual attempt (using scanlist) Possible solution: Implements scan here using the MAC Address from tha NFC tag, but only connect if this was found in the scan process */ private void nfc_init() { if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(getIntent().getAction())) { NdefMessage[] msgs = null; Parcelable[] rawMsgs = getIntent().getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES); String deviceAddress; if (rawMsgs != null) { msgs = new NdefMessage[rawMsgs.length]; for (int i = 0; i < rawMsgs.length; ++i) { msgs[i] = (NdefMessage) rawMsgs[i]; } NdefRecord[] records = msgs[0].getRecords(); deviceAddress = new String(records[1].getPayload(), 1, records[1].getPayload().length - 1, Charset.forName("UTF-8")); // record 1 contains the MAC Address deviceAddress = deviceAddress.substring(2); // remove the language mark "en" coded in the NDEF text/plain record mDevice = mBtAdapter.getDefaultAdapter().getRemoteDevice(deviceAddress); // no testa s retorna mDevice com o endereo passado ((TextView) findViewById(R.id.deviceName)).setText(mDevice.getName() + " - connecting"); mService.connect(deviceAddress); Log.d(TAG, "... NFC_init mDevice= " + mDevice + " mService= " + mService); } } } private void service_init() { Intent bindIntent = new Intent(this, UartService.class); bindService(bindIntent, mServiceConnection, Context.BIND_AUTO_CREATE); LocalBroadcastManager.getInstance(this).registerReceiver(UARTStatusChangeReceiver, makeGattUpdateIntentFilter()); } private static IntentFilter makeGattUpdateIntentFilter() { final IntentFilter intentFilter = new IntentFilter(); intentFilter.addAction(UartService.ACTION_GATT_CONNECTED); intentFilter.addAction(UartService.ACTION_GATT_DISCONNECTED); intentFilter.addAction(UartService.ACTION_GATT_SERVICES_DISCOVERED); intentFilter.addAction(UartService.DEVICE_DOES_NOT_SUPPORT_UART); return intentFilter; } @Override public void onStart() { super.onStart(); } @Override public void onDestroy() { super.onDestroy(); Log.d(TAG, "onDestroy()"); try { LocalBroadcastManager.getInstance(this).unregisterReceiver(UARTStatusChangeReceiver); } catch (Exception ignore) { Log.e(TAG, ignore.toString()); } unbindService(mServiceConnection); mService.stopSelf(); mService = null; } @Override protected void onStop() { Log.d(TAG, "onStop"); super.onStop(); } @Override protected void onPause() { Log.d(TAG, "onPause"); super.onPause(); } @Override protected void onRestart() { super.onRestart(); Log.d(TAG, "onRestart"); } @Override public void onResume() { super.onResume(); Log.d(TAG, "onResume"); if (!mBtAdapter.isEnabled()) { Log.i(TAG, "onResume - BT not enabled yet"); Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, REQUEST_ENABLE_BT); } } @Override public void onConfigurationChanged(Configuration newConfig) { super.onConfigurationChanged(newConfig); } @Override public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case REQUEST_SELECT_DEVICE: //When the DeviceListActivity return, with the selected device address if (resultCode == Activity.RESULT_OK && data != null) { String deviceAddress = data.getStringExtra(BluetoothDevice.EXTRA_DEVICE); mDevice = BluetoothAdapter.getDefaultAdapter().getRemoteDevice(deviceAddress); Log.d(TAG, "... onActivityResultdevice.address==" + mDevice + "mserviceValue" + mService); ((TextView) findViewById(R.id.deviceName)).setText(mDevice.getName() + " - connecting"); mService.connect(deviceAddress); } break; case REQUEST_ENABLE_BT: // When the request to enable Bluetooth returns if (resultCode == Activity.RESULT_OK) { Toast.makeText(this, "Bluetooth has turned on ", Toast.LENGTH_SHORT).show(); } else { // User did not enable Bluetooth or an error occurred Log.d(TAG, "BT not enabled"); Toast.makeText(this, "Problem in BT Turning ON ", Toast.LENGTH_SHORT).show(); finish(); } break; case MainActivity.REQUEST_SELECT_RECIPE: if (resultCode != Activity.RESULT_CANCELED) { value = null; bakery = (Bakery) data.getSerializableExtra("bakery"); recipe = (Recipe) data.getSerializableExtra("recipe"); value = bakery.setProgram(value); new AlertDialog.Builder(this).setTitle("Ateno").setMessage( "Antes de continuar, cetifique-se que a bandeja foi inserida com todos os ingredientes.") .setPositiveButton("Continuar", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { //send program to the machine mService.writeRXCharacteristic(value); } }).show(); //register this operation in cloud } break; default: Log.e(TAG, "wrong request code"); break; } } private void showMessage(String msg) { Toast.makeText(this, msg, Toast.LENGTH_SHORT).show(); } @Override public void onBackPressed() { new AlertDialog.Builder(this).setTitle("Ateno").setMessage("Deseja sair da aplicao?") .setPositiveButton("Sim", new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { mService.close(); mService.stopSelf(); finish(); } }).setNegativeButton("No", null).show(); } @Override public boolean onTouch(View view, MotionEvent motionEvent) { byte[] value; value = new byte[] { NO_OPERATION, NOT_PRESSED, NOT_PRESSED, NOT_PRESSED, NOT_PRESSED, NOT_PRESSED, NOT_PRESSED, NOT_PRESSED }; if (motionEvent.getAction() == MotionEvent.ACTION_DOWN) { value[OPERATION] = COMMAND; switch (view.getId()) { case R.id.button_time_more: value[TIME_MORE] = PRESSED; break; case R.id.button_time_less: value[TIME_LESS] = PRESSED; break; case R.id.button_dough_qnt: value[DOUGH_QNT] = PRESSED; break; case R.id.button_options: value[OPTIONS] = PRESSED; break; case R.id.button_color: value[COLOR] = PRESSED; break; case R.id.button_init_stop: value[INIT_STOP] = PRESSED; break; } mService.writeRXCharacteristic(value); view.setBackgroundColor(0xFFFDFBB3); } if (motionEvent.getAction() == MotionEvent.ACTION_UP) { value[OPERATION] = COMMAND; switch (view.getId()) { case R.id.button_time_more: value[TIME_MORE] = NOT_PRESSED; break; case R.id.button_time_less: value[TIME_LESS] = NOT_PRESSED; break; case R.id.button_dough_qnt: value[DOUGH_QNT] = NOT_PRESSED; break; case R.id.button_options: value[OPTIONS] = NOT_PRESSED; break; case R.id.button_color: value[COLOR] = NOT_PRESSED; break; case R.id.button_init_stop: value[INIT_STOP] = NOT_PRESSED; break; } mService.writeRXCharacteristic(value); view.setBackgroundColor(0xFFCAC7C7); } return true; } }