Java tutorial
/* * Copyright (C) 2009 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 oyagev.projects.android.ArduCopter; import java.lang.reflect.Array; import java.nio.ByteBuffer; import java.util.Hashtable; import java.util.Map; import org.json.JSONArray; import org.json.JSONObject; import oyagev.projects.YCommunicator.CallbackInterface; import oyagev.projects.YCommunicator.YCommunicator; import android.app.ActionBar; import android.app.Activity; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.content.Context; import android.content.Intent; import android.content.SharedPreferences; import android.graphics.drawable.GradientDrawable.Orientation; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.AttributeSet; import android.util.Log; import android.view.KeyEvent; import android.view.Menu; import android.view.MenuInflater; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.view.ViewManager; import android.view.Window; import android.view.View.OnClickListener; import android.view.inputmethod.EditorInfo; import android.widget.ArrayAdapter; import android.widget.Button; import android.widget.EditText; import android.widget.LinearLayout; import android.widget.LinearLayout.LayoutParams; import android.widget.ListView; import android.widget.ProgressBar; import android.widget.SeekBar; import android.widget.SeekBar.OnSeekBarChangeListener; import android.widget.TextView; import android.widget.Toast; /** * This is the main Activity that displays the current chat session. */ public class BluetoothChat extends Activity { // Debugging private static final String TAG = "BluetoothChat"; private static final boolean D = true; // 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 BluetoothChatService Handler public static final String DEVICE_NAME = "device_name"; public static final String TOAST = "toast"; // Intent request codes private static final int REQUEST_CONNECT_DEVICE_SECURE = 1; private static final int REQUEST_CONNECT_DEVICE_INSECURE = 2; private static final int REQUEST_ENABLE_BT = 3; // Layout Views private ListView mConversationView; private EditText mOutEditText; private Button mSendButton; // Name of the connected device private String mConnectedDeviceName = null; // Array adapter for the conversation thread private ArrayAdapter<String> mConversationArrayAdapter; // String buffer for outgoing messages private StringBuffer mOutStringBuffer; // Local Bluetooth adapter private BluetoothAdapter mBluetoothAdapter = null; // Member object for the chat services private BluetoothChatService mChatService = null; private YCommunicator ycomm = null; private Hashtable<View, Integer> viewCmdMap; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if (D) Log.e(TAG, "+++ ON CREATE +++"); // Set up the window layout setContentView(R.layout.main); // 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 public void onStart() { super.onStart(); if (D) Log.e(TAG, "++ ON START ++"); ycomm = new YCommunicator(); setupControls(); // If BT is not on, request that it be enabled. // setupChat() will then be called during onActivityResult if (!mBluetoothAdapter.isEnabled()) { Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableIntent, REQUEST_ENABLE_BT); // Otherwise, setup the chat session } else { if (mChatService == null) setupChat(); } } @Override public synchronized void onResume() { super.onResume(); if (D) Log.e(TAG, "+ ON RESUME +"); // 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 (mChatService != null) { // Only if the state is STATE_NONE, do we know that we haven't started already if (mChatService.getState() == BluetoothChatService.STATE_NONE) { // Start the Bluetooth chat services mChatService.start(); } } } private void setupControls() { Log.d(TAG, "setupControls()"); SharedPreferences settings = getSharedPreferences(SettingsActivity.PREFS_NAME, MODE_PRIVATE); String strPrefs = settings.getString("prefs", "{}"); cleanControls(); try { JSONObject prefs = new JSONObject(strPrefs); JSONArray controls = prefs.getJSONArray("controls"); for (int i = 0; i < controls.length(); i++) { JSONObject row = (JSONObject) controls.get(i); Log.d(TAG, "Adding control: " + row.getString("type")); addControl(row.getString("name"), row.getString("type"), row.getInt("cmd")); } } catch (Exception e) { // TODO Auto-generated catch block //e.printStackTrace(); Toast.makeText(this, e.getMessage().toString(), Toast.LENGTH_LONG).show(); Log.e(TAG, e.getMessage().toString()); } /* SeekBar s = (SeekBar)findViewById(R.id.seek1); TextView t = (TextView)findViewById(R.id.seek_text1); s.setOnSeekBarChangeListener(new MSeekListener(s,t)); */ } private void setupChat() { Log.d(TAG, "setupChat()"); // Initialize the array adapter for the conversation thread mConversationArrayAdapter = new ArrayAdapter<String>(this, R.layout.message); //mConversationView = (ListView) findViewById(R.id.in); //mConversationView.setAdapter(mConversationArrayAdapter); /* // Initialize the compose field with a listener for the return key mOutEditText = (EditText) findViewById(R.id.edit_text_out); mOutEditText.setOnEditorActionListener(mWriteListener); // Initialize the send button with a listener that for click events mSendButton = (Button) findViewById(R.id.button_send); mSendButton.setOnClickListener(new OnClickListener() { public void onClick(View v) { // Send a message using content of the edit text widget TextView view = (TextView) findViewById(R.id.edit_text_out); String message = view.getText().toString(); sendMessage(message); } }); */ // Initialize the BluetoothChatService to perform bluetooth connections mChatService = new BluetoothChatService(this, mHandler); // Initialize the buffer for outgoing messages mOutStringBuffer = new StringBuffer(""); } @Override public synchronized void onPause() { super.onPause(); if (D) Log.e(TAG, "- ON PAUSE -"); } @Override public void onStop() { super.onStop(); if (D) Log.e(TAG, "-- ON STOP --"); } @Override public void onDestroy() { super.onDestroy(); // Stop the Bluetooth chat services if (mChatService != null) mChatService.stop(); if (D) Log.e(TAG, "--- ON DESTROY ---"); } private void ensureDiscoverable() { if (D) Log.d(TAG, "ensure discoverable"); 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); } } /** * Sends a message. * @param message A string of text to send. */ private void sendMessage(String message) { // Check that there's actually something to send if (message.length() > 0) { // Get the message bytes and tell the BluetoothChatService to write byte[] send = message.getBytes(); sendMessage(send); } } private void sendMessage(byte[] message) { if (mChatService.getState() != BluetoothChatService.STATE_CONNECTED) { Toast.makeText(this, R.string.not_connected, Toast.LENGTH_SHORT).show(); return; } mChatService.write(message); // Reset out string buffer to zero and clear the edit text field mOutStringBuffer.setLength(0); //mOutEditText.setText(mOutStringBuffer); } // The action listener for the EditText widget, to listen for the return key private TextView.OnEditorActionListener mWriteListener = new TextView.OnEditorActionListener() { public boolean onEditorAction(TextView view, int actionId, KeyEvent event) { // If the action is a key-up event on the return key, send the message if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) { String message = view.getText().toString(); sendMessage(message); } if (D) Log.i(TAG, "END onEditorAction"); return true; } }; private final void setStatus(int resId) { //final ActionBar actionBar = getActionBar(); //actionBar.setSubtitle(resId); } private final void setStatus(CharSequence subTitle) { //final ActionBar actionBar = getActionBar(); //actionBar.setSubtitle(subTitle); } // 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: if (D) Log.i(TAG, "MESSAGE_STATE_CHANGE: " + msg.arg1); switch (msg.arg1) { case BluetoothChatService.STATE_CONNECTED: setStatus(getString(R.string.title_connected_to, mConnectedDeviceName)); mConversationArrayAdapter.clear(); break; case BluetoothChatService.STATE_CONNECTING: setStatus(R.string.title_connecting); break; case BluetoothChatService.STATE_LISTEN: case BluetoothChatService.STATE_NONE: setStatus(R.string.title_not_connected); break; } break; case MESSAGE_WRITE: byte[] writeBuf = (byte[]) msg.obj; // construct a string from the buffer String writeMessage = new String(writeBuf); mConversationArrayAdapter.add("Me: " + writeMessage); break; case MESSAGE_READ: byte[] readBuf = (byte[]) msg.obj; // construct a string from the valid bytes in the buffer //String readMessage = new String(readBuf, 0, msg.arg1); //mConversationArrayAdapter.add(mConnectedDeviceName+": " + readMessage); //Toast.makeText(getApplicationContext(), "Got msg", 1).show(); int i; byte b; //Log.d("incoming","Start message:"); for (i = 0; i < msg.arg1; i++) { b = readBuf[i]; //Log.d("incoming",""+(int)b); ycomm.write(b); } //Log.d("incoming","End message!"); 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) { if (D) Log.d(TAG, "onActivityResult " + resultCode); switch (requestCode) { case REQUEST_CONNECT_DEVICE_SECURE: // When DeviceListActivity returns with a device to connect if (resultCode == Activity.RESULT_OK) { connectDevice(data, true); } break; case REQUEST_CONNECT_DEVICE_INSECURE: // When DeviceListActivity returns with a device to connect if (resultCode == Activity.RESULT_OK) { connectDevice(data, false); } 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 setupChat(); } else { // User did not enable Bluetooth or an error occurred Log.d(TAG, "BT not enabled"); Toast.makeText(this, R.string.bt_not_enabled_leaving, Toast.LENGTH_SHORT).show(); finish(); } } } private void connectDevice(Intent data, boolean secure) { // 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 mChatService.connect(device, secure); } @Override public boolean onCreateOptionsMenu(Menu menu) { MenuInflater inflater = getMenuInflater(); inflater.inflate(R.menu.option_menu, menu); return true; } @Override public boolean onOptionsItemSelected(MenuItem item) { Intent serverIntent = null; switch (item.getItemId()) { /*case R.id.secure_connect_scan: // Launch the DeviceListActivity to see devices and do scan serverIntent = new Intent(this, DeviceListActivity.class); startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_SECURE); return true;*/ case R.id.insecure_connect_scan: // Launch the DeviceListActivity to see devices and do scan serverIntent = new Intent(this, DeviceListActivity.class); startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_INSECURE); return true; case R.id.open_settings_ic: // Launch the DeviceListActivity to see devices and do scan serverIntent = new Intent(this, SettingsActivity.class); //startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_INSECURE); startActivity(serverIntent); return true; case R.id.discoverable: // Ensure this device is discoverable by others ensureDiscoverable(); return true; } return false; } private void addControl(String name, String type, int commandValue) { Log.d(TAG, "Adding cmd: " + commandValue); LinearLayout row = new LinearLayout(this); row.setOrientation(LinearLayout.HORIZONTAL); row.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT)); View view = new TextView(this); //hidden view for command value TextView cmdView = new TextView(this); cmdView.setLayoutParams(new LinearLayout.LayoutParams(0, 0)); cmdView.setVisibility(View.INVISIBLE); cmdView.setText(String.valueOf(commandValue)); cmdView.setTag("cmd"); //Setup the control if (type.equals("Button")) { view = new Button(this); ((Button) view).setText(name); ((Button) view).setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { TextView cmd = (TextView) ((LinearLayout) v.getParent()).findViewWithTag("cmd"); dispatchUserEvent((int) Integer.valueOf(cmd.getText().toString()), new byte[] { 1 }); } }); } else if (type.equals("Edit")) { view = new EditText(this); ((EditText) view).setText(name); } else if (type.equals("Label")) { view = new TextView(this); ((TextView) view).setText(name); } else if (type.equals("Scrollbar")) { view = new LinearLayout(this); TextView text = new TextView(this); text.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT)); text.setText(name); text.setTag("seek_text"); SeekBar bar = new SeekBar(this); bar.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT)); ((LinearLayout) view).setOrientation(LinearLayout.VERTICAL); ((LinearLayout) view).addView(text); ((LinearLayout) view).addView(bar); bar.setOnSeekBarChangeListener(new OnSeekBarChangeListener() { @Override public void onStopTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onStartTrackingTouch(SeekBar seekBar) { // TODO Auto-generated method stub } @Override public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { TextView cmd = (TextView) ((LinearLayout) ((LinearLayout) seekBar.getParent()).getParent()) .findViewWithTag("cmd"); ByteBuffer buffer = ByteBuffer.allocate(2); buffer.putShort((short) progress); dispatchUserEvent((int) Integer.valueOf(cmd.getText().toString()), buffer.array()); } }); } else if (type.equals("Input String")) { view = new LinearLayout(this); TextView text = new TextView(this); text.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.WRAP_CONTENT, LinearLayout.LayoutParams.WRAP_CONTENT)); text.setText(name); text.setTag("inp_text"); TextView inp = new TextView(this); inp.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT)); //((LinearLayout)view).setOrientation(LinearLayout.VERTICAL); ((LinearLayout) view).addView(text); ((LinearLayout) view).addView(inp); ycomm.registerCallback((byte) commandValue, new CallbackView(getApplicationContext(), inp) { @Override public void run(byte type, byte command, byte[] data, byte data_langth) { // TODO Auto-generated method stub String str = new String(data); ((TextView) this.view).setText(str); } }); } else { return; } view.setLayoutParams(new LinearLayout.LayoutParams(LinearLayout.LayoutParams.MATCH_PARENT, LinearLayout.LayoutParams.WRAP_CONTENT)); row.addView(cmdView); row.addView(view); ((LinearLayout) findViewById(R.id.controls_layout)).addView(row); } private void cleanControls() { LinearLayout controls = ((LinearLayout) findViewById(R.id.controls_layout)); controls.removeAllViews(); } private void dispatchUserEvent(int command, byte[] data) { Log.d(TAG, String.format("Dispatching cmd %d", command)); //byte[] buff = ByteBuffer.allocate(4).putInt(progress).array(); ycomm.dispatch((byte) 0, (byte) command, data); //Integer i = Integer.valueOf(progress); //Log.d("Listener","State: "+bt.getState()); byte buffOut[] = new byte[ycomm.available()]; int i = 0; while (ycomm.available() > 0) { buffOut[i++] = ycomm.read(); } sendMessage(buffOut); } abstract class CallbackView implements CallbackInterface { Context context; View view; public CallbackView(Context context, View view) { this.context = context; this.view = view; } } }