Java tutorial
/* * Copyright (C) 2014 Bluetooth Connection Template * * 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.hardcopy.arduinonavi; import java.util.Timer; import java.util.TimerTask; import com.google.android.gms.maps.GoogleMap; import com.hardcopy.arduinonavi.controller.GMapControl; import com.hardcopy.arduinonavi.service.ArduinoNavigatorService; import com.hardcopy.arduinonavi.utils.AppSettings; import com.hardcopy.arduinonavi.utils.Constants; import com.hardcopy.arduinonavi.utils.Logs; import com.hardcopy.arduinonavi.utils.RecycleUtils; import com.hardcopy.arduinonavi.views.FragmentAdapter; import com.hardcopy.arduinonavi.views.IFragmentListener; import android.app.ActionBar; import android.app.Activity; import android.app.FragmentTransaction; import android.bluetooth.BluetoothAdapter; import android.content.ComponentName; import android.content.Context; import android.content.Intent; import android.content.ServiceConnection; import android.content.res.Configuration; import android.os.Bundle; import android.os.Handler; import android.os.IBinder; import android.os.Message; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.widget.Button; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; public class MainActivity extends FragmentActivity implements ActionBar.TabListener, IFragmentListener, View.OnClickListener { // Debugging private static final String TAG = "RetroWatchActivity"; // Context, System private Context mContext; private ArduinoNavigatorService mService; private ActivityHandler mActivityHandler; // Global // UI stuff private FragmentManager mFragmentManager; private FragmentAdapter mSectionsPagerAdapter; private ViewPager mViewPager; private TextView mNaviInfo = null; private Button mNaviMode = null; private ImageView mImageBT = null; private TextView mTextStatus = null; // Google map private GMapControl mMapControl; // Refresh timer private Timer mRefreshTimer = null; /***************************************************** * Overrided methods ******************************************************/ @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); //----- System, Context mContext = this; //.getApplicationContext(); mActivityHandler = new ActivityHandler(); AppSettings.initializeAppSettings(mContext); setContentView(R.layout.activity_main); // Set up the action bar. final ActionBar actionBar = getActionBar(); actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Create the adapter that will return a fragment for each of the primary sections of the app. mFragmentManager = getSupportFragmentManager(); mSectionsPagerAdapter = new FragmentAdapter(mFragmentManager, mContext, this, mActivityHandler); // Set up the ViewPager with the sections adapter. mViewPager = (ViewPager) findViewById(R.id.pager); mViewPager.setAdapter(mSectionsPagerAdapter); // When swiping between different sections, select the corresponding tab. mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { actionBar.setSelectedNavigationItem(position); } }); // For each of the sections in the app, add a tab to the action bar. for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) { // Create a tab with text corresponding to the page title defined by the adapter. actionBar .addTab(actionBar.newTab().setText(mSectionsPagerAdapter.getPageTitle(i)).setTabListener(this)); } // Setup views mNaviInfo = (TextView) findViewById(R.id.status_navi_info); mNaviInfo.setText(getResources().getString(R.string.title_destination) + ": "); mNaviMode = (Button) findViewById(R.id.btn_mode); mNaviMode.setOnClickListener(this); showUnitTypeButton(); mImageBT = (ImageView) findViewById(R.id.status_title); mImageBT.setImageDrawable(getResources().getDrawable(android.R.drawable.presence_invisible)); mTextStatus = (TextView) findViewById(R.id.status_text); mTextStatus.setText(getResources().getString(R.string.bt_state_init)); // Do data initialization after service started and binded doStartService(); } @Override public synchronized void onStart() { super.onStart(); } @Override public synchronized void onPause() { super.onPause(); } @Override public void onStop() { // Stop the timer if (mRefreshTimer != null) { mRefreshTimer.cancel(); mRefreshTimer = null; } super.onStop(); } @Override public void onDestroy() { super.onDestroy(); finalizeActivity(); } @Override public void onLowMemory() { super.onLowMemory(); // onDestroy is not always called when applications are finished by Android system. finalizeActivity(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.action_scan: // Launch the DeviceListActivity to see devices and do scan doScan(); return true; case R.id.action_discoverable: // Ensure this device is discoverable by others ensureDiscoverable(); return true; } return false; } @Override public void onBackPressed() { super.onBackPressed(); // TODO: Disable this line to run below code } @Override public void onConfigurationChanged(Configuration newConfig) { // This prevents reload after configuration changes super.onConfigurationChanged(newConfig); } /** * Implements TabListener */ @Override public void onTabSelected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { // When the given tab is selected, switch to the corresponding page in the ViewPager. mViewPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } @Override public void onTabReselected(ActionBar.Tab tab, FragmentTransaction fragmentTransaction) { } @Override public void OnFragmentCallback(int msgType, int arg0, int arg1, String arg2, String arg3, Object arg4) { switch (msgType) { case IFragmentListener.CALLBACK_RUN_IN_BACKGROUND: if (mService != null) mService.startServiceMonitoring(); break; case IFragmentListener.CALLBACK_MAP_CREATED: if (arg4 != null) { mMapControl = new GMapControl(mContext, null, this, (GoogleMap) arg4, arg0, arg1); } break; case IFragmentListener.CALLBACK_MAP_UPDATE_NAVI_INFO: showDestination(arg2, arg3, arg0, arg1, (String) arg4); //if(mService != null) // mService.sendMessageToRemote(); break; default: break; } } @Override public void onClick(View v) { switch (v.getId()) { case R.id.btn_mode: int unitType = AppSettings.getUnitType(); if (unitType == GMapControl.UNIT_TYPE_METERS) { AppSettings.setSettingsValue(AppSettings.SETTINGS_UNIT_TYPE, false, GMapControl.UNIT_TYPE_FEET, 0, null); } else { AppSettings.setSettingsValue(AppSettings.SETTINGS_UNIT_TYPE, false, GMapControl.UNIT_TYPE_METERS, 0, null); } showUnitTypeButton(); break; } } /***************************************************** * Private methods ******************************************************/ /** * Service connection */ private ServiceConnection mServiceConn = new ServiceConnection() { public void onServiceConnected(ComponentName className, IBinder binder) { Log.d(TAG, "Activity - Service connected"); mService = ((ArduinoNavigatorService.ServiceBinder) binder).getService(); // Activity couldn't work with mService until connections are made // So initialize parameters and settings here. Do not initialize while running onCreate() initialize(); } public void onServiceDisconnected(ComponentName className) { mService = null; } }; /** * Start service if it's not running */ private void doStartService() { Log.d(TAG, "# Activity - doStartService()"); startService(new Intent(this, ArduinoNavigatorService.class)); bindService(new Intent(this, ArduinoNavigatorService.class), mServiceConn, Context.BIND_AUTO_CREATE); } /** * Stop the service */ private void doStopService() { Log.d(TAG, "# Activity - doStopService()"); mService.finalizeService(); stopService(new Intent(this, ArduinoNavigatorService.class)); } /** * Initialization / Finalization */ private void initialize() { Logs.d(TAG, "# Activity - initialize()"); mService.setupService(mActivityHandler); // If BT is not on, request that it be enabled. // RetroWatchService.setupBT() will then be called during onActivityResult if (!mService.isBluetoothEnabled()) { Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, Constants.REQUEST_ENABLE_BT); } // Load activity reports and display if (mRefreshTimer != null) { mRefreshTimer.cancel(); } // Use below timer if you want scheduled job //mRefreshTimer = new Timer(); //mRefreshTimer.schedule(new RefreshTimerTask(), 5*1000); } private void finalizeActivity() { Logs.d(TAG, "# Activity - finalizeActivity()"); if (!AppSettings.getBgService()) { doStopService(); } else { } // Clean used resources RecycleUtils.recursiveRecycle(getWindow().getDecorView()); System.gc(); } /** * Launch the DeviceListActivity to see devices and do scan */ private void doScan() { Intent intent = new Intent(this, DeviceListActivity.class); startActivityForResult(intent, Constants.REQUEST_CONNECT_DEVICE); } /** * Ensure this device is discoverable by others */ private void ensureDiscoverable() { if (mService.getBluetoothScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) { Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300); startActivity(intent); } } private void showDestination(String lat, String lang, int distance, int angle, String options) { mNaviInfo.setText(lat + ", " + lang); int unitType = 0; String strUnit = " meters"; if (options.contains("meter")) { unitType = GMapControl.UNIT_TYPE_METERS; } else { unitType = GMapControl.UNIT_TYPE_FEET; strUnit = " feet"; } if (unitType == GMapControl.UNIT_TYPE_METERS) { if (distance > 1000) { distance = distance / 1000; unitType = GMapControl.UNIT_TYPE_KMETERS; strUnit = " km"; } } else if (unitType == GMapControl.UNIT_TYPE_FEET) { distance *= 3.2808; if (distance > 5280) { distance = distance / 5280; // I assumed that 1 Mile = 5280 Feet. unitType = GMapControl.UNIT_TYPE_MILES; strUnit = " miles"; } } mNaviInfo.append("\n" + distance); mNaviInfo.append(strUnit); mNaviInfo.append(", " + angle); mNaviInfo.append("'"); } private void showUnitTypeButton() { int unitType = AppSettings.getUnitType(); if (unitType == GMapControl.UNIT_TYPE_METERS) { mNaviMode.setText(getResources().getString(R.string.title_unit_meter)); } else { mNaviMode.setText(getResources().getString(R.string.title_unit_feet)); } } /***************************************************** * Public classes ******************************************************/ /** * Receives result from external activity */ public void onActivityResult(int requestCode, int resultCode, Intent data) { Logs.d(TAG, "onActivityResult " + resultCode); switch (requestCode) { case Constants.REQUEST_CONNECT_DEVICE: // When DeviceListActivity returns with a device to connect if (resultCode == Activity.RESULT_OK) { // Get the device MAC address String address = data.getExtras().getString(DeviceListActivity.EXTRA_DEVICE_ADDRESS); // Attempt to connect to the device if (address != null && mService != null) mService.connectDevice(address); } break; case Constants.REQUEST_ENABLE_BT: // When the request to enable Bluetooth returns if (resultCode == Activity.RESULT_OK) { // Bluetooth is now enabled, so set up a BT session mService.setupBT(); } else { // User did not enable Bluetooth or an error occured Logs.e(TAG, "BT is not enabled"); Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show(); } break; } // End of switch(requestCode) } /***************************************************** * Handler, Callback, Sub-classes ******************************************************/ public class ActivityHandler extends Handler { @Override public void handleMessage(Message msg) { switch (msg.what) { // Receives BT state messages from service // and updates BT state UI case Constants.MESSAGE_BT_STATE_INITIALIZED: mTextStatus.setText(getResources().getString(R.string.bt_title) + ": " + getResources().getString(R.string.bt_state_init)); mImageBT.setImageDrawable(getResources().getDrawable(android.R.drawable.presence_invisible)); break; case Constants.MESSAGE_BT_STATE_LISTENING: mTextStatus.setText(getResources().getString(R.string.bt_title) + ": " + getResources().getString(R.string.bt_state_wait)); mImageBT.setImageDrawable(getResources().getDrawable(android.R.drawable.presence_invisible)); break; case Constants.MESSAGE_BT_STATE_CONNECTING: mTextStatus.setText(getResources().getString(R.string.bt_title) + ": " + getResources().getString(R.string.bt_state_connect)); mImageBT.setImageDrawable(getResources().getDrawable(android.R.drawable.presence_away)); break; case Constants.MESSAGE_BT_STATE_CONNECTED: if (mService != null) { String deviceName = mService.getDeviceName(); if (deviceName != null) { mTextStatus.setText(getResources().getString(R.string.bt_title) + ": " + getResources().getString(R.string.bt_state_connected) + " " + deviceName); mImageBT.setImageDrawable(getResources().getDrawable(android.R.drawable.presence_online)); } } break; case Constants.MESSAGE_BT_STATE_ERROR: mTextStatus.setText(getResources().getString(R.string.bt_state_error)); mImageBT.setImageDrawable(getResources().getDrawable(android.R.drawable.presence_busy)); break; // BT Command status case Constants.MESSAGE_CMD_ERROR_NOT_CONNECTED: mTextStatus.setText(getResources().getString(R.string.bt_cmd_sending_error)); mImageBT.setImageDrawable(getResources().getDrawable(android.R.drawable.presence_busy)); break; /////////////////////////////////////////////// // When there's incoming packets on bluetooth // do the UI works like below /////////////////////////////////////////////// // case Constants.MESSAGE_READ_ACCEL_REPORT: // ActivityReport ar = (ActivityReport)msg.obj; // if(ar != null) { // TimelineFragment frg = (TimelineFragment) mSectionsPagerAdapter.getItem(FragmentAdapter.FRAGMENT_POS_TIMELINE); // frg.showActivityReport(ar); // } // break; default: break; } super.handleMessage(msg); } } // End of class ActivityHandler /** * Auto-refresh Timer */ private class RefreshTimerTask extends TimerTask { public RefreshTimerTask() { } public void run() { mActivityHandler.post(new Runnable() { public void run() { // TODO: mRefreshTimer = null; } }); } } }