系統服務
1、活動管理器
<uses-permission android:name="android.permission.GET_TASKS"/> ActivityManager activityManager = (ActivityManager) getSystemService(Context.ACTIVITY_SERVICE); 2、警報管理器
AlarmManager alarmManager = (AlarmManager) getSystemService(Context.ALARM_SERVICE); 3、音頻管理器
AudioManager audioManager = (AudioManager) getSystemService(Context.AUDIO_SERVICE); 4、剪貼闆管理器
ClipboardManager clipboardManager = (ClipboardManager) getSystemService(Context.CLIPBOARD_SERVICE); 5、連接配接管理器
權限：<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/> ConnectivityManager connectivityManager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE); 6、輸入法管理器
InputMethodManager inputMethodManager = (InputMethodManager) getSystemService(Context.INPUT_METHOD_SERVICE); 7、鍵盤管理器
KeyguardManager keyguardManager = (KeyguardManager) getSystemService(Context.KEYGUARD_SERVICE); 8、布局解壓器管理器
LayoutInflater layoutInflater = (LayoutInflater) getSystemService(Context.LAYOUT_INFLATER_SERVICE); 9、位置管理器
LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); 10、通知管理器
NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); 11、電源管理器
權限：<uses-permission android:name="android.permission.DEVICE_POWER"/> PowerManager powerManager = (PowerManager) getSystemService(Context.POWER_SERVICE); 12、搜尋管理器
SearchManager searchManager = (SearchManager) getSystemService(Context.SEARCH_SERVICE); 13、傳感器管理器
SensorManager sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE); 14、電話管理器
<uses-permission android:name="android.permission.READ_PHONE_STATE"/> TelephonyManager telephonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE); 15、振動器
<uses-permission android:name="android.permission.VIBRATE"/> Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); 16、牆紙
<uses-permission android:name="android.permission.SET_WALLPAPER"/> WallpaperService wallpaperService = (WallpaperService) getSystemService(Context.WALLPAPER_SERVICE); 17、Wi-Fi管理器
<uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/> WifiManager wifiManager = (WifiManager) getSystemService(Context.WIFI_SERVICE); 18、視窗管理器
WindowManager windowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE); 正常
1、發送短信
<uses-permission android:name="android.permission.SEND_SMS"/> SmsManager sm = SmsManager.getDefault(); String destinationNumber ="0123456789"; String text = "Hello, MOTO!"; sm.sendTextMessage(destinationNumber, null, text, null, null); 2、狀态欄通知
int notificationID = 10; NotificationManager notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE); Notification notification = new Notification(R.drawable.yourIconId, "Put your notification text here", System.currentTimeMillis()); Intent intent = new Intent(this, YourActivityName.class); PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, intent, 0); notification.setLatestEventInfo(this, "Put your title here", "Put your text here", pendingIntent); notificationManager.notify(notificationID, notification); 3、指定時間内手機震動
<uses-permission android:name="android.permission.VIBRATE"/> Vibrator vibrator = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE); vibrator.vibrate(1000); vibrator.vibrate(new long[] {0, 200, 100, 100, 500, 500}, 4); 對話框
1、日期選擇器對話框
DatePickerDialog.OnDateSetListener datePickerDialogListener = new DatePickerDialog.OnDateSetListener() { public void onDateSet(DatePicker view, int year,int monthOfYear, int dayOfMonth) { //........ } }; Calendar calendar = Calendar.getInstance(); int year = calendar.get(Calendar.YEAR); int month = calendar.get(Calendar.MONTH); int day = calendar.get(Calendar.DAY_OF_MONTH); DatePickerDialog datePickerDialog = new DatePickerDialog(this,datePickerDialogListener,year, month, day); datePickerDialog.show(); 2、時間選取器對話框
TimePickerDialog.OnTimeSetListener timePickerDialogListener = new TimePickerDialog.OnTimeSetListener() { public void onTimeSet(TimePicker view, int hourOfDay, int minute) { //......... } }; Calendar c = Calendar.getInstance(); int hour = c.get(Calendar.HOUR_OF_DAY); int minute = c.get(Calendar.MINUTE); TimePickerDialog timerPickerDialog = new TimePickerDialog(this,timePickerDialogListener, hour, minute, false); timerPickerDialog.show(); 3、全屏顯示
int flag = WindowManager.layoutParams.FLAG_FULLSCREEN;//定義全屏參數 getWindow().setFlags(flag,flag);//設定flag标示 GPS
1、擷取目前的GPS坐标
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 0, 0, new LocationListener() { public void onStatusChanged(String provider, int status, Bundle extras) { } public void onStatusChanged(String provider, int status, Bundle extras) { } public void onProviderDisabled(String provider) { } public void onLocationChanged(Location location) { double latitute = location.getLatitude(); double longitude = location.getLongitude(); } }); 2、擷取最近一次已知的GPS坐标
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); Location location = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER); double latitute, longitude = 0; if(location != null) { latitute = location.getLatitude(); longitude = location.getLongitude(); }); 3、GPS坐标之間的距離
Location src = new Location("gps"); Location dest = new Location("gps"); src.setLatitude(originLatitude); src.setLongitude(originLongitude); dest.setLatitude(originLatitude); dest.setLongitude(originLongitude); float distance = src.distanceTo(dest); 4、注冊監聽GPS狀态變化
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.addGpsStatusListener(new GpsStatus.Listener() { public void onGpsStatusChanged(int event) { switch(event) { // Event sent when the GPS system has started case GpsStatus.GPS_EVENT_STARTED: // put your code here break; // Event sent when the GPS system has stopped case GpsStatus.GPS_EVENT_STOPPED: // put your code here break; // Event sent when the GPS system has received its first fix since starting case GpsStatus.GPS_EVENT_FIRST_FIX: // put your code here break; // Event sent periodically to report GPS satellite status case GpsStatus.GPS_EVENT_SATELLITE_STATUS: // put your code here break; } } }); 5、注冊監聽鄰近提示
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION"/> PendingIntent pendingIntent = getPendindIntent(); LocationManager locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE); locationManager.addProximityAlert(latitude, longitude, radius, -1, pendingIntent); public PendingIntent getPendindIntent() { // return PendingIntent.getService(Context, int, Intent, int); // return PendingIntent.getActivity(Context, int, Intent, int); return PendingIntent.getBroadcast(Context, int, Intent, int); } 媒體
1、播放應用程式自帶的音頻或視訊檔案
MediaPlayer mp = MediaPlayer.create(this, R.raw.soundId); mp.start(); 2、播放位于指定的檔案路徑或 URL 的音頻或視訊
MediaPlayer mp = new MediaPlayer(); mp.setDataSource(FILE_PATH_OR_URL); mp.prepare(); mp.start(); 3、開始錄制音頻
<uses-permission android:name="android.permission.RECORD_AUDIO"/> MediaRecorder recorder = new MediaRecorder(); recorder.setAudioSource(MediaRecorder.AudioSource.MIC); recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP); recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB); recorder.setOutputFile(PATH_NAME); // The file must already exist recorder.prepare(); recorder.start(); 4、停止錄制音頻
recorder.stop(); recorder.release(); 藍牙
1、驗證是否支援藍牙
<uses-permission android:name="android.permission.BLUETOOTH"/> BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); if (btAdapter == null) { // Bluetooth is not supported, do something here to warn the user return; } 2、連接配接至裝置
<uses-permission android:name="android.permission.BLUETOOTH"/> UUID MY_UUID = UUID.fromString("yourdata"); BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); BluetoothSocket socket = null; try { socket = device.createRfcommSocketToServiceRecord(MY_UUID); btAdapter.cancelDiscovery(); socket.connect(); } catch(IOException e) { //......... } finally { socket.close(); } 3、啟用藍牙
<uses-permission android:name="android.permission.BLUETOOTH"/> int ENABLE_BLUETOOTH = 1; BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); if (btAdapter == null) return; if (!btAdapter.isEnabled()) { Intent enableBluetooth = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); startActivityForResult(enableBluetooth, ENABLE_BLUETOOTH); // Now implement the onActivityResult() and wait for it to be invoked with ENABLE_BLUETOOTH } 4、擷取成對裝置
BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); Set<BluetoothDevice> devices = btAdapter.getBondedDevices(); if (devices.size() > 0) { for (BluetoothDevice pairedDevice : devices) { // do something useful with the device } } 5、確定可檢測此裝置
BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); if (btAdapter == null) return; if (btAdapter.getScanMode() != BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE) { Intent makeDiscoverable = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE); makeDiscoverable.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 500); // In a real situation you would probably use startActivityForResult to get the user decision. startActivity(makeDiscoverable); } 6、等待傳入連接配接
UUID MY_UUID = UUID.fromString("yourdata"); String NAME = "BluetoothExample"; BluetoothServerSocket btServerSocket = null; BluetoothAdapter btAdapter = BluetoothAdapter.getDefaultAdapter(); BluetoothSocket socket = null; try { btServerSocket = btAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID); socket = btServerSocket.accept(); } catch (IOException e) { // Deal with it } if (socket != null) { InputStream inputStream = null; OutputStream outputStream = null; try { inputStream = socket.getInputStream(); outputStream = socket.getOutputStream(); } catch (IOException e) { // Deal with it } } 7、遠端裝置檢測寄存器
IntentFilter intentFilter = new IntentFilter(BluetoothDevice.ACTION_FOUND); this.registerReceiver(bluetoothReceiver, intentFilter); intentFilter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED); this.registerReceiver(bluetoothReceiver, intentFilter); private final BroadcastReceiver bluetoothReceiver = new BroadcastReceiver() { @Override public void onReceive(Context context, Intent intent) { String action = intent.getAction(); if (BluetoothDevice.ACTION_FOUND.equals(action)) { BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE); if (device.getBondState() != BluetoothDevice.BOND_BONDED) { // device is not already paired. Do something useful here. } } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) { // do something useful here } } }; ![與專家面對面：Android開發入門問與答[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)