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MIT License
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package com.luugiathuy.apps.remotebluetooth; //ww w .j a v a2 s .c o m import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.Window; import android.widget.TextView; import android.widget.Toast; public class RemoteBluetooth extends Activity { // Layout view private TextView mTitle; // Intent request codes private static final int REQUEST_CONNECT_DEVICE = 1; private static final int REQUEST_ENABLE_BT = 2; // Message types sent from the BluetoothChatService Handler public static final int MESSAGE_STATE_CHANGE = 1; public static final int MESSAGE_READ = 2; public static final int MESSAGE_WRITE = 3; public static final int MESSAGE_DEVICE_NAME = 4; public static final int MESSAGE_TOAST = 5; // Key names received from the BluetoothCommandService Handler public static final String DEVICE_NAME = "device_name"; public static final String TOAST = "toast"; // Name of the connected device private String mConnectedDeviceName = null; // Local Bluetooth adapter private BluetoothAdapter mBluetoothAdapter = null; // Member object for Bluetooth Command Service private BluetoothCommandService mCommandService = null; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Set up the window layout requestWindowFeature(Window.FEATURE_CUSTOM_TITLE); setContentView(R.layout.main); getWindow().setFeatureInt(Window.FEATURE_CUSTOM_TITLE, R.layout.custom_title); // Set up the custom title mTitle = (TextView) findViewById(R.id.title_left_text); mTitle.setText(R.string.app_name); mTitle = (TextView) findViewById(R.id.title_right_text); // Get local Bluetooth adapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); // If the adapter is null, then Bluetooth is not supported if (mBluetoothAdapter == null) { Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show(); finish(); return; } } @Override protected void onStart() { super.onStart(); // If BT is not on, request that it be enabled. // setupCommand() will then be called during onActivityResult if (!mBluetoothAdapter.isEnabled()) { Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, REQUEST_ENABLE_BT); } // otherwise set up the command service else { if (mCommandService==null) setupCommand(); } } @Override protected void onResume() { super.onResume(); // Performing this check in onResume() covers the case in which BT was // not enabled during onStart(), so we were paused to enable it... // onResume() will be called when ACTION_REQUEST_ENABLE activity returns. if (mCommandService != null) { if (mCommandService.getState() == BluetoothCommandService.STATE_NONE) { mCommandService.start(); } } } private void setupCommand() { // Initialize the BluetoothChatService to perform bluetooth connections mCommandService = new BluetoothCommandService(this, mHandler); } @Override protected void onDestroy() { super.onDestroy(); if (mCommandService != null) mCommandService.stop(); } private void ensureDiscoverable() { if (mBluetoothAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) { Intent discoverableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300); startActivity(discoverableIntent); } } // The Handler that gets information back from the BluetoothChatService private final Handler mHandler = new Handler() { @Override public void handleMessage(Message msg) { switch (msg.what) { case MESSAGE_STATE_CHANGE: switch (msg.arg1) { case BluetoothCommandService.STATE_CONNECTED: mTitle.setText(R.string.title_connected_to); mTitle.append(mConnectedDeviceName); break; case BluetoothCommandService.STATE_CONNECTING: mTitle.setText(R.string.title_connecting); break; case BluetoothCommandService.STATE_LISTEN: case BluetoothCommandService.STATE_NONE: mTitle.setText(R.string.title_not_connected); break; } break; case MESSAGE_DEVICE_NAME: // save the connected device's name mConnectedDeviceName = msg.getData().getString(DEVICE_NAME); Toast.makeText(getApplicationContext(), "Connected to " + mConnectedDeviceName, Toast.LENGTH_SHORT).show(); break; case MESSAGE_TOAST: Toast.makeText(getApplicationContext(), msg.getData().getString(TOAST), Toast.LENGTH_SHORT).show(); break; } } }; public void onActivityResult(int requestCode, int resultCode, Intent data) { switch (requestCode) { case 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); // Get the BLuetoothDevice object BluetoothDevice device = mBluetoothAdapter.getRemoteDevice(address); // Attempt to connect to the device mCommandService.connect(device); } break; case REQUEST_ENABLE_BT: // When the request to enable Bluetooth returns if (resultCode == Activity.RESULT_OK) { // Bluetooth is now enabled, so set up a chat session setupCommand(); } else { // User did not enable Bluetooth or an error occured Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show(); finish(); } } } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.option_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()) { case R.id.scan: // Launch the DeviceListActivity to see devices and do scan Intent serverIntent = new Intent(this, DeviceListActivity.class); startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE); return true; case R.id.discoverable: // Ensure this device is discoverable by others ensureDiscoverable(); return true; } return false; } @Override public boolean onKeyDown(int keyCode, KeyEvent event) { if (keyCode == KeyEvent.KEYCODE_VOLUME_UP) { mCommandService.write(BluetoothCommandService.VOL_UP); return true; } else if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN){ mCommandService.write(BluetoothCommandService.VOL_DOWN); return true; } return super.onKeyDown(keyCode, event); } }