我尝试使用我的代码连接到名为slate的外部硬件设备。我按照其API指南中的说明操作，让设备与我的Android应用程序一起使用。但是，这里似乎有一些我无法注意到的东西，我甚至无法在他们的示例应用程序中找到相关信息......这个问题是：我尝试连接到设备，但连接尚未完成。这是我点击Connect to之前的调试输出，直到我点击Connect ...
06-07 02:44:06.384 4444-4444/com.example.qwill.thoughtcast I/BluetoothDevice: connectGatt
06-07 02:44:06.386 1553-2143/? W/Bth: BluetoothFreeze:tag: 181 uid: 10143 pid: 4444
06-07 02:44:06.387 1873-2001/? I/BluetoothState: new active bluetooth uid: 10143, pid:4444, reason:BLE_CONNECT
06-07 02:44:06.396 1553-2143/? W/Bth: BluetoothFreeze:tag: 181 uid: 10143 pid: 4444
06-07 02:44:06.396 1553-2143/? I/BtGatt.JNI: gattClientRegisterAppNative(L997): gattClientRegisterAppNative, register_client begin
gattClientRegisterAppNative(L1003): gattClientRegisterAppNative, register_client
gattClientRegisterAppNative(L1005): gattClientRegisterAppNative, register_client finish
06-07 02:44:06.396 1553-2048/? I/bt_att: GATT_Register
GATT_Register: allocated gatt_if=6
GATT_StartIf gatt_if=6
06-07 02:44:06.396 1553-1762/? W/bt_btif: HAL bt_gatt_callbacks->client->register_client_cb
如果任何人都知道为什么我无法连接到我的设备，请告诉我。
这是我连接设备的地方......
listie.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
// Stop scanning
slateManager.stopScan();
slateManager.connect(slateManager.getDeviceByIndex(position));
}
});
答案 0 :(得分：0)
配对设备。使用此代码。它对我有用
public class BTBluetoothActivity extends AppCompatActivity {
private ArrayList<BluetoothDevice> mDeviceList = new
ArrayList<BluetoothDevice>();
private BluetoothAdapter mBluetoothAdapter;
private ProgressDialog mProgressDlg;
private TextView mStatusTv;
private Button mActivateBtn;
private Button mPairedBtn;
private Button mScanBtn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_btbluetooth);
mStatusTv = (TextView) findViewById(R.id.tv_status);
mActivateBtn = (Button) findViewById(R.id.btn_enable);
mPairedBtn = (Button) findViewById(R.id.btn_view_paired);
mScanBtn = (Button) findViewById(R.id.btn_scan);
mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
mProgressDlg = new ProgressDialog(this);
mProgressDlg.setMessage("Scanning...");
mProgressDlg.setCancelable(false);
mProgressDlg.setButton(DialogInterface.BUTTON_NEGATIVE, "Cancel", new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
mBluetoothAdapter.cancelDiscovery();
}
});
if (mBluetoothAdapter == null) {
showUnsupported();
} else {
mPairedBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Set<BluetoothDevice> pairedDevices = mBluetoothAdapter.getBondedDevices();
if (pairedDevices == null || pairedDevices.size() == 0) {
showToast("No Paired Devices Found");
} else {
ArrayList<BluetoothDevice> list = new ArrayList<BluetoothDevice>();
list.addAll(pairedDevices);
if (list != null) {
Intent intent = new Intent(BTBluetoothActivity.this, DeviceListActivity.class);
intent.putParcelableArrayListExtra("device.list", list);
startActivity(intent);
} else {
Toast.makeText(BTBluetoothActivity.this, "Bluetooth device not found", Toast.LENGTH_SHORT).show();
}
}
}
});
mScanBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View arg0) {
ensureDiscoverable();
mBluetoothAdapter.startDiscovery();
}
});
mActivateBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mBluetoothAdapter.isEnabled()) {
mBluetoothAdapter.disable();
showDisabled();
} else {
Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
startActivityForResult(intent, 1000);
}
}
});
if (mBluetoothAdapter.isEnabled()) {
showEnabled();
} else {
showDisabled();
}
}
IntentFilter filter = new IntentFilter();
filter.addAction(BluetoothAdapter.ACTION_STATE_CHANGED);
filter.addAction(BluetoothDevice.ACTION_FOUND);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_STARTED);
filter.addAction(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
filter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
registerReceiver(mReceiver, filter);
IntentFilter btCheck = new IntentFilter();
btCheck.addAction(BluetoothDevice.ACTION_ACL_CONNECTED);
btCheck.addAction(BluetoothDevice.ACTION_ACL_DISCONNECTED);
registerReceiver(btConnectionCheck, btCheck);
}
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, 3000);
startActivity(discoverableIntent);
}
}
@Override
public void onPause() {
if (mBluetoothAdapter != null) {
if (mBluetoothAdapter.isDiscovering()) {
mBluetoothAdapter.cancelDiscovery();
}
}
super.onPause();
}
@Override
public void onDestroy() {
unregisterReceiver(mReceiver);
unregisterReceiver(btConnectionCheck);
mBluetoothAdapter.disable();
super.onDestroy();
}
private void showEnabled() {
mStatusTv.setText("Bluetooth is On");
mStatusTv.setTextColor(Color.BLUE);
mActivateBtn.setText("Turn OFF");
mActivateBtn.setEnabled(true);
mPairedBtn.setEnabled(true);
mScanBtn.setEnabled(true);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mPairedBtn.setBackground(getResources().getDrawable(R.drawable.rectangle));
mScanBtn.setBackground(getResources().getDrawable(R.drawable.rectangle));
}
}
private void showDisabled() {
inCheck = true;
mStatusTv.setText("Bluetooth is Off");
mStatusTv.setTextColor(Color.RED);
mActivateBtn.setText("Turn ON");
mActivateBtn.setEnabled(true);
mPairedBtn.setEnabled(false);
mScanBtn.setEnabled(false);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
mPairedBtn.setBackground(getResources().getDrawable(R.drawable.rectcheck));
mScanBtn.setBackground(getResources().getDrawable(R.drawable.rectcheck));
}
}
private void showUnsupported() {
mStatusTv.setText("Bluetooth is unsupported by this device");
inCheck = false;
mActivateBtn.setText("Turn ON");
mActivateBtn.setEnabled(false);
mPairedBtn.setEnabled(false);
mScanBtn.setEnabled(false);
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, BluetoothAdapter.ERROR);
if (state == BluetoothAdapter.STATE_ON) {
showToast("Enabled");
showEnabled();
}
} else if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
mDeviceList = new ArrayList<BluetoothDevice>();
mProgressDlg.show();
} else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
mProgressDlg.dismiss();
if (inCheck) {
if (mDeviceList == null || mDeviceList.size() == 0) {
showToast("No bluetooth device found around");
} else {
Intent newIntent = new Intent(BTBluetoothActivity.this, DeviceListActivity.class);
newIntent.putParcelableArrayListExtra("device.list", mDeviceList);
startActivity(newIntent);
}
}
} else if (BluetoothDevice.ACTION_FOUND.equals(action)) {
BluetoothDevice device = (BluetoothDevice) intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
mDeviceList.add(device);
// showToast("Found device " + device.getName());
}
else if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)){
BluetoothDevice mDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
if (mDevice.getBondState() == BluetoothDevice.BOND_BONDED){
Log.d(DEVICE_NAME, "BroadcastReceiver: BOND_BONDED.");
// Device will be pair and return here
}
//case2: creating a bone
if (mDevice.getBondState() == BluetoothDevice.BOND_BONDING) {
Log.d(DEVICE_NAME, "BroadcastReceiver: BOND_BONDING.");
}
//case3: breaking a bond
if (mDevice.getBondState() == BluetoothDevice.BOND_NONE) {
Log.d(DEVICE_NAME, "BroadcastReceiver: BOND_NONE.");
}
}
}
};
BroadcastReceiver btConnectionCheck = new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)){
Toast.makeText(context, "BT Connected", Toast.LENGTH_SHORT).show();
} else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)){
Toast.makeText(context, "BT DisConnected", Toast.LENGTH_SHORT).show();
}
}
};
}
设备列表类
public class DeviceListActivity extends AppCompatActivity {
private ListView mListView;
private TextView status;
private DeviceListAdapters mAdapter;
private ArrayList<BluetoothDevice> mDeviceList;
private boolean doubleActivity;
private BluetoothDevice device;
private boolean stopWorker;
private int readBufferPosition;
private Thread workerThread;
InputStream mmInputStream;
private byte[] readBuffer;
private BluetoothSocket mmSocket;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_device_list);
mDeviceList = getIntent().getExtras().getParcelableArrayList("device.list");
mListView = (ListView) findViewById(R.id.lv_paired);
mAdapter = new DeviceListAdapters(this);
status = findViewById(R.id.tv_status);
status.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
}
});
mAdapter.setData(mDeviceList);
mAdapter.setListener(new DeviceListAdapters.OnPairButtonClickListener() {
@Override
public void onPairButtonClick(int position) {
device = mDeviceList.get(position);
if (device.getBondState() == BluetoothDevice.BOND_BONDED) {
unpairDevice(device);
} else {
showToast("Pairing...");
pairDevice(device);
}
}
});
mListView.setAdapter(mAdapter);
registerReceiver(mPairReceiver, new IntentFilter(BluetoothDevice.ACTION_BOND_STATE_CHANGED));
}
@Override
public void onDestroy() {
unregisterReceiver(mPairReceiver);
super.onDestroy();
}
private void showToast(String message) {
Toast.makeText(getApplicationContext(), message, Toast.LENGTH_SHORT).show();
}
private void pairDevice(BluetoothDevice device) {
try {
Method method = device.getClass().getMethod("createBond", (Class[]) null);
method.invoke(device, (Object[]) null);
doubleActivity = true;
} catch (Exception e) {
e.printStackTrace();
}
}
private void unpairDevice(BluetoothDevice device) {
try {
Method method = device.getClass().getMethod("removeBond", (Class[]) null);
method.invoke(device, (Object[]) null);
} catch (Exception e) {
e.printStackTrace();
}
}
private final BroadcastReceiver mPairReceiver = new BroadcastReceiver() {
public void onReceive(Context context, Intent intent) {
String action = intent.getAction();
if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
final int state = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
final int prevState = intent.getIntExtra(BluetoothDevice.EXTRA_PREVIOUS_BOND_STATE, BluetoothDevice.ERROR);
if (state == BluetoothDevice.BOND_BONDED && prevState == BluetoothDevice.BOND_BONDING) {
showToast("Paired");
} else if (state == BluetoothDevice.BOND_NONE && prevState == BluetoothDevice.BOND_BONDED){
showToast("Unpaired");
}
mAdapter.notifyDataSetChanged();
}
}
};
@Override
protected void onPause() {
if (doubleActivity){
finish();
}
super.onPause();
}
}
适配器级
public class DeviceListAdapters extends BaseAdapter {
private LayoutInflater mInflater;
private List<BluetoothDevice> mData;
private OnPairButtonClickListener mListener;
public DeviceListAdapters(Context context) {
mInflater = LayoutInflater.from(context);
}
public void setData(List<BluetoothDevice> data) {
mData = data;
}
public void setListener(OnPairButtonClickListener listener) {
mListener = listener;
}
public int getCount() {
return (mData == null) ? 0 : mData.size();
}
public Object getItem(int position) {
return null;
}
public long getItemId(int position) {
return position;
}
public View getView(final int position, View convertView, ViewGroup parent) {
ViewHolder holder;
if (convertView == null) {
convertView = mInflater.inflate(R.layout.list_item_devices, null);
holder = new ViewHolder();
holder.nameTv = (TextView) convertView.findViewById(R.id.tv_name);
holder.addressTv = (TextView) convertView.findViewById(R.id.tv_address);
holder.pairBtn = (Button) convertView.findViewById(R.id.btn_pair);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
BluetoothDevice device = mData.get(position);
holder.nameTv.setText(device.getName());
holder.addressTv.setText(device.getAddress());
holder.pairBtn.setText((device.getBondState() == BluetoothDevice.BOND_BONDED) ? "Unpair" : "Pair");
holder.pairBtn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (mListener != null) {
mListener.onPairButtonClick(position);
}
}
});
return convertView;
}
static class ViewHolder {
TextView nameTv;
TextView addressTv;
TextView pairBtn;
}
public interface OnPairButtonClickListener {
public abstract void onPairButtonClick(int position);
}
}
activity_btbluetooth.xml
<RelativeLayout
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@color/green"
tools:context="com.BTBluetooth.BTBluetoothActivity">
<ImageView
android:id="@+id/icon_bt"
android:scaleType="matrix"
android:layout_marginTop="20dp"
android:layout_alignParentTop="true"
android:layout_centerHorizontal="true"
android:src="@drawable/btbackground"
android:layout_width="wrap_content"
android:layout_height="wrap_content" />
<android.support.v7.widget.CardView
android:layout_below="@id/icon_bt"
app:cardElevation="60dp"
app:cardCornerRadius="40dp"
android:layout_marginLeft="40dp"
android:layout_marginRight="40dp"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<LinearLayout
android:padding="30dp"
android:layout_gravity="center"
android:orientation="vertical"
android:layout_width="match_parent"
android:layout_height="match_parent">
<TextView
android:background="@drawable/loginrect"
android:textStyle="bold"
android:id="@+id/tv_status"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:gravity="center"
android:textSize="24sp"
android:textColor="#ff0000"
android:text="Bluetooth off" />
<Button
android:layout_marginTop="3dp"
android:background="@drawable/rectangle"
android:textColor="@color/white"
android:textStyle="bold"
android:id="@+id/btn_enable"
android:layout_gravity="end"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="Turn On" />
<Button
android:layout_marginTop="3dp"
android:background="@drawable/rectangle"
android:textColor="@color/white"
android:textStyle="bold"
android:id="@+id/btn_view_paired"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:enabled="false"
android:text="view paired" />
<Button
android:layout_marginTop="3dp"
android:background="@drawable/rectangle"
android:textColor="@color/white"
android:textStyle="bold"
android:id="@+id/btn_scan"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:enabled="false"
android:text="scan devices" />
</LinearLayout>
</android.support.v7.widget.CardView>
</RelativeLayout>
activity_device_list.xml
<LinearLayout
android:orientation="vertical"
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="#bebebe"
tools:context="com..BTBluetooth.DeviceListActivity">
<TextView
android:id="@+id/tv_status"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp"
android:padding="5dp"
android:textStyle="bold"
android:textColor="@color/white"
android:background="@color/toolbarcolor"
android:text="Bluetooth Devices" />
<ListView
android:id="@+id/lv_paired"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginTop="2dp"
android:cacheColorHint="#00000000" />
</LinearLayout>
list_item_devices.xml
<?xml version="1.0" encoding="utf-8"?>
<android.support.v7.widget.CardView xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="wrap_content"
xmlns:app="http://schemas.android.com/apk/res-auto"
app:cardElevation="20dp"
app:cardCornerRadius="2dp">
<RelativeLayout
android:padding="16dp"
android:background="#e1e1e1"
android:layout_width="match_parent"
android:layout_height="wrap_content">
<Button
android:background="@drawable/switch_track_on"
android:textColor="@color/white"
android:textStyle="bold"
android:id="@+id/btn_pair"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_centerInParent="true"
android:layout_alignParentRight="true"
android:text="text pair" />
<TextView
android:id="@+id/tv_name"
android:textStyle="bold"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@+id/btn_pair"
android:layout_alignTop="@+id/btn_pair"
android:layout_alignParentLeft="true"
android:textSize="18sp"
android:textColor="@color/black"
android:text="Galaxy Nexus" />
<TextView
android:layout_marginTop="2dp"
android:id="@+id/tv_address"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_toLeftOf="@+id/btn_pair"
android:layout_alignParentLeft="true"
android:layout_alignBottom="@+id/btn_pair"
android:text="000000000" />
</RelativeLayout>
</android.support.v7.widget.CardView>
答案 1 :(得分：0)
正如我在许多BLE应用中看到的那样，他们在stopScan()和connecGatt()方法之间保留了一些时间。
startScan()和stopScan() connectGatt() transferData() 在这些任务之间保持一段时间肯定有助于提高效率 LE连接。