实例介绍
【实例简介】Android例子源码安卓通过蓝牙与单片机交互
【实例截图】
【核心代码】
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 | /* * 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 * * * 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.BluetoothLock;import java.util.Hashtable;import com.example.android.BluetoothLock.R;import android.annotation.SuppressLint;import android.annotation.TargetApi;import android.app.Activity;import android.app.AlertDialog;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.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.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.ListView;import android.widget.TextView;import android.widget.Toast;/** * This is the main Activity that displays the current Lock session. */public class BluetoothLock extends Activity { // Debugging private static final String TAG = "BluetoothLock"; private static final boolean D = true; // Message types sent from the BluetoothLockService 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; //设定从机模块返回的数据 public static final String OPEN_LOCK_SUCCESS = "S"; public static final String OPEN_LOCK_FAIL = "F"; // Key names received from the BluetoothLockService 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 = 1; private static final int REQUEST_ENABLE_BT = 2; // Layout Views TextView mTitle; private EditText mOutEditText; private Button mSendButton; private TextView mSetPassword; // Name of the connected device private String mConnectedDeviceName = null; // String buffer for outgoing messages private StringBuffer mOutStringBuffer; // Local Bluetooth adapter private BluetoothAdapter mBluetoothAdapter = null; // Member object for the Lock services private BluetoothLockService mLockService = null; @SuppressLint("NewApi") @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); if(D) Log.e(TAG, " ON CREATE "); // 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); //先进行连接然后才能修改密码 /** * 修改密码 */ //添加点击“修改密码”事件 mSetPassword = (TextView) findViewById(R.id.text_setPassword); mSetPassword.setOnClickListener(new OnClickListener(){ @Override //激活修改密码窗体 public void onClick(View v) { Intent intent = new Intent(BluetoothLock.this,SetPasswordActivity.class); //Intent intent = new Intent(BluetoothLock.this,otherActivity.class); startActivity(intent); } }); // 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; } } @SuppressLint("NewApi") @Override public void onStart() { super.onStart(); if(D) Log.e(TAG, " ON START "); // If BT is not on, request that it be enabled. // setupLock() 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 Lock session } else { if (mLockService == null) setupLock(); } } @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 (mLockService != null) { // Only if the state is STATE_NONE, do we know that we haven't started already if (mLockService.getState() == BluetoothLockService.STATE_NONE) { // Start the Bluetooth Lock services mLockService.start(); } } } @SuppressLint("NewApi") private void setupLock() { Log.d(TAG, "setupLock()"); // Initialize the compose field with a listener for the return key mOutEditText = (EditText) findViewById(R.id.setCurrentPassword); 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.setCurrentPassword); String message = view.getText().toString();//获取用户输入的内容 //对用户的数据进行处理 message = "&" message "$"; sendMessage(message); } }); // Initialize the BluetoothLockService to perform bluetooth connections mLockService = new BluetoothLockService(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 Lock services if (mLockService != null) mLockService.stop(); if(D) Log.e(TAG, "--- ON DESTROY ---"); } @SuppressLint("NewApi") 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); } } /** * 发送数据. * @param message A string of text to send. */ private void sendMessage(String message) { // Check that we're actually connected before trying anything if (mLockService.getState() != BluetoothLockService.STATE_CONNECTED) { Toast.makeText(this, 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 BluetoothLockService to write byte[] send = message.getBytes(); mLockService.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 @SuppressLint("NewApi") 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 回车键发送消息 if (actionId == EditorInfo.IME_NULL && event.getAction() == KeyEvent.ACTION_UP) { String message = view.getText().toString(); message = "&" message "$"; sendMessage(message); } if(D) Log.i(TAG, "END onEditorAction"); return true; } }; /** * *The Handler 获取从BluetoothLockService返回来的信息 只是为了显示 */ 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 BluetoothLockService.STATE_CONNECTED: mTitle.setText(R.string.title_connected_to); mTitle.append(mConnectedDeviceName); break; case BluetoothLockService.STATE_CONNECTING: mTitle.setText(R.string.title_connecting); break; case BluetoothLockService.STATE_LISTEN: case BluetoothLockService.STATE_NONE: mTitle.setText(R.string.title_not_connected); break; } break; case MESSAGE_WRITE: /* * 发送消息 */ byte[] writeBuf = (byte[]) msg.obj; // construct a string from the buffer String writeMessage = new String(writeBuf); 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); //开锁成功 给予提示 //DisplayToast("readMessage:" readMessage); /** * 读取接收到的消息 * * */ //对接收到的数据进行检测 if(readMessage.equals(OPEN_LOCK_SUCCESS)){ //开锁成功 给予提示 DisplayToast("开锁成功"); } else if(readMessage.equals(OPEN_LOCK_FAIL)){ DisplayToast("开锁失败"); } else { DisplayToast("程序运行未知错误"); } } //mConversationArrayAdapter.add(mConnectedDeviceName ": " readMessage); 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 DisplayToast(String str) { Toast toast=Toast.makeText(this, str, Toast.LENGTH_LONG); //toast.setGravity(Gravity.TOP, 0, 220); toast.show(); } @SuppressLint("NewApi") public void onActivityResult(int requestCode, int resultCode, Intent data) { if(D) Log.d(TAG, "onActivityResult " resultCode); 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); /* /*连接设备 根据地址获取到的device进行连接 * * */ mLockService.connect(device); DisplayToast("已经连接到从机模块"); } break; case REQUEST_ENABLE_BT: // When the request to enable Bluetooth returns if (resultCode == Activity.RESULT_OK) { // 连接成功 进行传送消息 setupLock(); //此时可以修改密码 } else { // User did not enable Bluetooth or an error occured Log.d(TAG, "BT not enabled"); 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: // 激活DeviceListActivity窗体 进行查看和扫描设备 Intent serverIntent = new Intent(this, DeviceListActivity.class); startActivityForResult(serverIntent, REQUEST_CONNECT_DEVICE); return true; case R.id.discoverable: // 确保此设备具有可检测性 ensureDiscoverable(); return true; } return false; }} |
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