From 0a5978937ff95a266c3a70415393c15fd340c1a3 Mon Sep 17 00:00:00 2001 From: Yuichi Araki Date: Mon, 1 Sep 2014 19:50:36 +0900 Subject: BluetoothChat: Porting from legacy directory. Change-Id: I7d7b39f6cefdf7e3e40bdf1655df5a994af15f8a --- .../bluetoothchat/BluetoothChatFragment.java | 397 +++++++++++++++++++++ 1 file changed, 397 insertions(+) create mode 100644 connectivity/bluetooth/BluetoothChat/BluetoothChatSample/src/main/java/com/example/android/bluetoothchat/BluetoothChatFragment.java (limited to 'connectivity/bluetooth/BluetoothChat/BluetoothChatSample/src/main/java/com/example/android/bluetoothchat/BluetoothChatFragment.java') diff --git a/connectivity/bluetooth/BluetoothChat/BluetoothChatSample/src/main/java/com/example/android/bluetoothchat/BluetoothChatFragment.java b/connectivity/bluetooth/BluetoothChat/BluetoothChatSample/src/main/java/com/example/android/bluetoothchat/BluetoothChatFragment.java new file mode 100644 index 00000000..8ca2b533 --- /dev/null +++ b/connectivity/bluetooth/BluetoothChat/BluetoothChatSample/src/main/java/com/example/android/bluetoothchat/BluetoothChatFragment.java @@ -0,0 +1,397 @@ +/* + * Copyright (C) 2014 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.example.android.bluetoothchat; + +import android.app.ActionBar; +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.support.annotation.Nullable; +import android.support.v4.app.Fragment; +import android.support.v4.app.FragmentActivity; +import android.view.KeyEvent; +import android.view.LayoutInflater; +import android.view.Menu; +import android.view.MenuInflater; +import android.view.MenuItem; +import android.view.View; +import android.view.ViewGroup; +import android.view.inputmethod.EditorInfo; +import android.widget.ArrayAdapter; +import android.widget.Button; +import android.widget.EditText; +import android.widget.ListView; +import android.widget.TextView; +import android.widget.Toast; + +import com.example.android.common.logger.Log; + +/** + * This fragment controls Bluetooth to communicate with other devices. + */ +public class BluetoothChatFragment extends Fragment { + + private static final String TAG = "BluetoothChatFragment"; + + // 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 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; + + @Override + public void onCreate(Bundle savedInstanceState) { + super.onCreate(savedInstanceState); + setHasOptionsMenu(true); + // Get local Bluetooth adapter + mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter(); + + // If the adapter is null, then Bluetooth is not supported + if (mBluetoothAdapter == null) { + FragmentActivity activity = getActivity(); + Toast.makeText(activity, "Bluetooth is not available", Toast.LENGTH_LONG).show(); + activity.finish(); + } + } + + + @Override + public void onStart() { + super.onStart(); + // 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 void onDestroy() { + super.onDestroy(); + if (mChatService != null) { + mChatService.stop(); + } + } + + @Override + public 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 (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(); + } + } + } + + @Override + public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, + @Nullable Bundle savedInstanceState) { + return inflater.inflate(R.layout.fragment_bluetooth_chat, container, false); + } + + @Override + public void onViewCreated(View view, @Nullable Bundle savedInstanceState) { + mConversationView = (ListView) view.findViewById(R.id.in); + mOutEditText = (EditText) view.findViewById(R.id.edit_text_out); + mSendButton = (Button) view.findViewById(R.id.button_send); + } + + /** + * Set up the UI and background operations for chat. + */ + private void setupChat() { + Log.d(TAG, "setupChat()"); + + // Initialize the array adapter for the conversation thread + mConversationArrayAdapter = new ArrayAdapter(getActivity(), R.layout.message); + + mConversationView.setAdapter(mConversationArrayAdapter); + + // Initialize the compose field with a listener for the return key + mOutEditText.setOnEditorActionListener(mWriteListener); + + // Initialize the send button with a listener that for click events + mSendButton.setOnClickListener(new View.OnClickListener() { + public void onClick(View v) { + // Send a message using content of the edit text widget + View view = getView(); + if (null != view) { + TextView textView = (TextView) view.findViewById(R.id.edit_text_out); + String message = textView.getText().toString(); + sendMessage(message); + } + } + }); + + // Initialize the BluetoothChatService to perform bluetooth connections + mChatService = new BluetoothChatService(getActivity(), mHandler); + + // Initialize the buffer for outgoing messages + mOutStringBuffer = new StringBuffer(""); + } + + /** + * Makes this device discoverable. + */ + 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); + } + } + + /** + * Sends a message. + * + * @param message A string of text to send. + */ + private void sendMessage(String message) { + // Check that we're actually connected before trying anything + if (mChatService.getState() != BluetoothChatService.STATE_CONNECTED) { + Toast.makeText(getActivity(), R.string.not_connected, Toast.LENGTH_SHORT).show(); + return; + } + + // 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(); + mChatService.write(send); + + // 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); + } + return true; + } + }; + + /** + * Updates the status on the action bar. + * + * @param resId a string resource ID + */ + private void setStatus(int resId) { + FragmentActivity activity = getActivity(); + if (null == activity) { + return; + } + final ActionBar actionBar = activity.getActionBar(); + if (null == actionBar) { + return; + } + actionBar.setSubtitle(resId); + } + + /** + * Updates the status on the action bar. + * + * @param subTitle status + */ + private void setStatus(CharSequence subTitle) { + FragmentActivity activity = getActivity(); + if (null == activity) { + return; + } + final ActionBar actionBar = activity.getActionBar(); + if (null == actionBar) { + return; + } + 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 Constants.MESSAGE_STATE_CHANGE: + 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 Constants.MESSAGE_WRITE: + byte[] writeBuf = (byte[]) msg.obj; + // construct a string from the buffer + String writeMessage = new String(writeBuf); + mConversationArrayAdapter.add("Me: " + writeMessage); + break; + case Constants.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); + break; + case Constants.MESSAGE_DEVICE_NAME: + // save the connected device's name + mConnectedDeviceName = msg.getData().getString(Constants.DEVICE_NAME); + Toast.makeText(getActivity(), "Connected to " + + mConnectedDeviceName, Toast.LENGTH_SHORT).show(); + break; + case Constants.MESSAGE_TOAST: + Toast.makeText(getActivity(), msg.getData().getString(Constants.TOAST), + Toast.LENGTH_SHORT).show(); + break; + } + } + }; + + public void onActivityResult(int requestCode, int resultCode, Intent data) { + 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(getActivity(), R.string.bt_not_enabled_leaving, + Toast.LENGTH_SHORT).show(); + getActivity().finish(); + } + } + } + + /** + * Establish connection with other divice + * + * @param data An {@link Intent} with {@link DeviceListActivity#EXTRA_DEVICE_ADDRESS} extra. + * @param secure Socket Security type - Secure (true) , Insecure (false) + */ + 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 void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { + inflater.inflate(R.menu.bluetooth_chat, menu); + } + + @Override + public boolean onOptionsItemSelected(MenuItem item) { + switch (item.getItemId()) { + case R.id.secure_connect_scan: { + // Launch the DeviceListActivity to see devices and do scan + Intent serverIntent = new Intent(getActivity(), 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 + Intent serverIntent = new Intent(getActivity(), DeviceListActivity.class); + startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE_INSECURE); + return true; + } + case R.id.discoverable: { + // Ensure this device is discoverable by others + ensureDiscoverable(); + return true; + } + } + return false; + } + +} -- cgit v1.2.3