android ble蓝牙不稳定,Android BLE 蓝牙的一些总结
https://github.com/Jasonchenlijian/FastBle
0.下载依赖库，添加库
1对蓝牙初始化和权限声明
1.1声明权限(AndroidManifest.xml中)
1.2在AndroidManifest.xml中还需要初始化蓝牙，我们新建一个class比如BleApplication,其中个代码如下：
@Override
public void onCreate() {
super.onCreate();
BleManager.getInstance().init(this);
BleManager.getInstance()
.enableLog(true)
.setMaxConnectCount(7)
.setOperateTimeout(5000);
1.3之后在AndroidManifest.xml中运用
2.在Activity中写蓝牙搜索，连接的代码
可以用一个BleManager变量，因为之后会用到很多次BleManager.getInstance();
private BleManager bleManager;
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
bleManager = BleManager.getInstance();
2.1在生命周期onResume中 判断有无蓝牙连接，如果没有就开始检查蓝牙状态和搜索蓝牙.
这有三个方法checkBluetoothState()， searchBluetoothDevices()，showConnectedDevice()
@Override
protected void onResume() {
super.onResume();
//检查蓝牙连接
if (BleManager.getInstance().getAllConnectedDevice().size() == 0){
checkBluetoothState();
searchBluetoothDevices();
}else
{
showConnectedDevice();
}
}
2.2几个方法的代码：
2.2.1checkBluetoothState()
//检测蓝牙打开情况
private void checkBluetoothState(){
if (!bleManager.isBlueEnable()){
//判断是否打开蓝牙
AlertDialog.Builder builder = new AlertDialog.Builder(BleSearchActivity.this);
builder.setTitle(R.string.ble_tips) //标题
.setMessage(R.string.ble_connect_suggestion) //提示内容
.setPositiveButton(R.string.positive_bt, new DialogInterface.OnClickListener() { //确定按钮
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_BLUETOOTH_SETTINGS);
startActivity(intent);
}
})
.setNegativeButton(R.string.negative_bt,null);
builder.show();
}
}
2.2.2 searchBluetoothDevices()
private void searchBluetoothDevices(){
bleManager.disconnectAllDevice();
BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (!bluetoothAdapter.isEnabled()) {
Toast.makeText(this, R.string.open_ble, Toast.LENGTH_LONG).show();
return;
}
String[] permissions = {Manifest.permission.ACCESS_FINE_LOCATION};
ListpermissionDeniedList = new ArrayList<>();
for (String permission : permissions) {
int permissionCheck = ContextCompat.checkSelfPermission(this, permission);
if (permissionCheck == PackageManager.PERMISSION_GRANTED) {
//检查权限
onPermissionGranted(permission);
} else {
permissionDeniedList.add(permission);
}
}
if (!permissionDeniedList.isEmpty()) {
String[] deniedPermissions = permissionDeniedList.toArray(new String[permissionDeniedList.size()]);
ActivityCompat.requestPermissions(this, deniedPermissions, REQUEST_CODE_PERMISSION_LOCATION);
}
}
2.2.2.1 onPermissionGranted
//检查权限
private void onPermissionGranted(String permission) {
//确定配置了 位置信息 权限
switch (permission) {
case Manifest.permission.ACCESS_FINE_LOCATION:
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M && !checkGPSIsOpen()) {
new android.app.AlertDialog.Builder(this)
.setTitle(R.string.ble_tips)
.setMessage(R.string.gps_notify)
.setNegativeButton(R.string.negative_bt,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
finish();
}
})
.setPositiveButton(R.string.set_gprs_tips,
new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
Intent intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
startActivityForResult(intent, REQUEST_CODE_OPEN_GPS);
}
})
.setCancelable(false)
.show();
} else {
startScan();
}
break;
}
}
2.2.2.1.1 checkGPSIsOpen()
private boolean checkGPSIsOpen() {
LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
if (locationManager == null)
return false;
return locationManager.isProviderEnabled(android.location.LocationManager.GPS_PROVIDER);
}
2.2.2.1.2 startScan()开始扫描蓝牙
//开始扫描
private void startScan() {
//设置扫描规则
BleScanRuleConfig scanRuleConfig = new BleScanRuleConfig.Builder()
// .setServiceUuids(serviceUuids) // 只扫描指定的服务的设备，可选
// .setDeviceName(true, null) // 只扫描指定广播名的设备，可选
// .setDeviceMac("34:81:F4:16:60:4F") // 只扫描指定mac的设备，可选
// .setAutoConnect(isAutoConnect) // 连接时的autoConnect参数，可选，默认false
.setScanTimeOut(5000) // 扫描超时时间，可选，默认10秒
.build();
bleManager.initScanRule(scanRuleConfig);
bleManager.scan(new BleScanCallback() {
@Override
public void onScanStarted(boolean success) {
mDeviceAdapter.clearScanDevice();
mDeviceAdapter.notifyDataSetChanged();
}
@Override
public void onLeScan(BleDevice bleDevice) {
super.onLeScan(bleDevice);
}
@Override
public void onScanning(BleDevice bleDevice) {
if (bleDevice.getName() != null){
mDeviceAdapter.addDevice(bleDevice);
mDeviceAdapter.notifyDataSetChanged();
}
}
@Override
public void onScanFinished(ListscanResultList) {
}
});
}
3.在列表中显示搜到的蓝牙，通过点击连接，用到listview
3.1点击连接蓝牙的代码
private void connect(final BleDevice bleDevice){
bleManager.connect(bleDevice, new BleGattCallback() {
@Override
public void onStartConnect() {
simpleDialog.setMessage("waiting..");
simpleDialog.show();
}
@Override
public void onConnectFail(BleException exception) {
simpleDialog.dismiss();
Toast.makeText(BleSearchActivity.this, R.string.label_failed,Toast.LENGTH_SHORT).show();
}
@Override
public void onConnectSuccess(BleDevice bleDevice, BluetoothGatt gatt, int status) {
mBleDevice = bleDevice;
simpleDialog.dismiss();
mDeviceAdapter.removeDevice(bleDevice);
mDeviceAdapter.notifyDataSetChanged();
mBleStatus.setText(bleDevice.getName());
mBleStatus.setTextColor(0xFF1DE9B6);
setMtu(bleDevice,27);
}
@Override
public void onDisConnected(boolean isActiveDisConnected, BleDevice device, BluetoothGatt gatt, int status) {
mDeviceAdapter.removeDevice(device);
mDeviceAdapter.notifyDataSetChanged();
mBleStatus.setText(R.string.noconnect_label);
mBleStatus.setTextColor(getResources().getColor(R.color.ivory));
ConnectObManager.getInstance().notifyObserver(bleDevice);
}
});
}
设置传输单元的最大长度
private void setMtu(BleDevice bleDevice, int mtu) {
BleManager.getInstance().setMtu(bleDevice, mtu, new BleMtuChangedCallback() {
@Override
public void onSetMTUFailure(BleException exception) {
// MyLog.i(TAG, "onsetMTUFailure" + exception.toString());
}
@Override
public void onMtuChanged(int mtu) {
// MyLog.i(TAG, "onMtuChanged: " + mtu);
try {
Thread.sleep(100);
} catch (InterruptedException e) {
e.printStackTrace();
}
MainActivity.actionStart(BleSearchActivity.this,"");
finish();
}
});
}
列表代码
mDeviceAdapter = new DeviceAdapter(this);
mDeviceAdapter.setOnDeviceClickListener(new DeviceAdapter.OnDeviceClickListener() {
@Override
public void onConnect(BleDevice bleDevice) {
if (!BleManager.getInstance().isConnected(bleDevice)) {
BleManager.getInstance().cancelScan();
connect(bleDevice);
}
}
@Override
public void onDisConnect(BleDevice bleDevice) {
if (BleManager.getInstance().isConnected(bleDevice)) {
BleManager.getInstance().disconnect(bleDevice);
}
}
});
ListView listView_device = (ListView) findViewById(R.id.liv_ble_device);
listView_device.setAdapter(mDeviceAdapter);
警告对话框代码
simpleDialog = new ProgressDialog(this);
simpleDialog.setCanceledOnTouchOutside(false);
//对话框取消的监听
simpleDialog.setOnCancelListener(new DialogInterface.OnCancelListener() {
@Override
public void onCancel(DialogInterface dialog) {
if (!BleManager.getInstance().isConnected(mBleDevice)) {
//MyLog.i(TAG, "进度框取消");
BleManager.getInstance().destroy();
simpleDialog.dismiss();
BleManager.getInstance().init(getApplication());
}
}
});