Example usage for android.bluetooth BluetoothGatt readCharacteristic

Introduction

In this page you can find the example usage for android.bluetooth BluetoothGatt readCharacteristic.

Prototype

public boolean readCharacteristic(BluetoothGattCharacteristic characteristic) 

Source Link

Document

Reads the requested characteristic from the associated remote device.

Usage

From source file:ble.AndroidBle.java

public boolean readCharacteristic(String address, BleGattCharacteristic characteristic) {
    BluetoothGatt gatt = mBluetoothGatts.get(address);
    if (gatt == null) {
        return false;
    }/*from w  w  w. j a  va2s.com*/

    return gatt.readCharacteristic(characteristic.getGattCharacteristicA());
}

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From source file:org.physical_web.physicalweb.BluetoothSite.java

@Override
public void onServicesDiscovered(BluetoothGatt gatt, int status) {
    Log.i(TAG, "Services Discovered");
    if (status != BluetoothGatt.GATT_SUCCESS) {
        Log.e(TAG, "Service discovery failed!");
        return;/*from  ww w . j a  v  a 2 s  .c  om*/
    }

    try {
        mHtml = new FileOutputStream(getHtmlFile());
    } catch (FileNotFoundException e) {
        Log.e(TAG, "File not found", e);
        return;
    }

    characteristic = gatt.getService(SERVICE_UUID).getCharacteristic(CHARACTERISTIC_WEBPAGE_UUID);
    gatt.readCharacteristic(characteristic);
}

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From source file:com.google.android.apps.forscience.ble.MyBleService.java

void readValue(String address, BluetoothGattCharacteristic theCharacteristic) {
    BluetoothGatt bluetoothGatt = addressToGattClient.get(address);
    if (bluetoothGatt == null) {
        Log.w(TAG, "No connection found for: " + address);
        sendGattBroadcast(address, BleEvents.READ_CHAR_FAIL, null);
        return;/*  www  . j  av a  2 s  . c om*/
    }
    bluetoothGatt.readCharacteristic(theCharacteristic);
}

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From source file:com.wolkabout.hexiwear.service.BluetoothService.java

private void readCharacteristic(final BluetoothGatt gatt, final Characteristic characteristic) {
    if (!isConnected) {
        return;/*from  w  ww  . jav a2s.  co  m*/
    }

    final BluetoothGattCharacteristic gattCharacteristic = readableCharacteristics
            .get(characteristic.getUuid());
    if (gattCharacteristic != null) {
        gatt.readCharacteristic(gattCharacteristic);
    }
}

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From source file:org.physical_web.physicalweb.BluetoothSite.java

@Override
public void onCharacteristicRead(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic, int status) {
    // Make sure the site is running.  It can stop if the dialog is dismissed very quickly.
    if (!isRunning()) {
        close();//from www.  ja va 2s.c  o  m
        return;
    }

    // Make sure the read was successful.
    if (status != BluetoothGatt.GATT_SUCCESS) {
        Log.i(TAG, "onCharacteristicRead unsuccessful: " + status);
        close();
        Toast.makeText(activity, R.string.ble_download_error_message, Toast.LENGTH_SHORT).show();
        return;
    }

    // Record the data.
    Log.i(TAG, "onCharacteristicRead successful");
    try {
        mHtml.write(characteristic.getValue());
    } catch (IOException e) {
        Log.e(TAG, "Could not write to buffer", e);
        close();
        return;
    }

    // Request a new read if we are not done.
    if (characteristic.getValue().length == transferRate) {
        gatt.readCharacteristic(this.characteristic);
        return;
    }

    // At this point we are done.  Show the file.
    Log.i(TAG, "transfer is complete");
    close();
    openInChrome(getHtmlFile());
}

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From source file:kr.ac.kaist.resl.sensorservice.BluetoothService.java

private boolean readCharacteristic(BluetoothGatt gatt, BluetoothGattCharacteristic characteristic) {
    if (null == characteristic)
        return false;

    final int charaProp = characteristic.getProperties();

    if ((charaProp | BluetoothGattCharacteristic.PROPERTY_READ) > 0) {
        // If there is an active notification on a characteristic,
        // clear it first so it doesn't update the data field on the user interface.
        if (mNotifyCharacteristic != null) {
            bleService.setCharacteristicNotification(gatt, mNotifyCharacteristic, false);
            mNotifyCharacteristic = null;
        }/*  www  . ja va  2s . com*/

        //JS: if no data is displayed, immediately read data from the connected sensor.
        gatt.readCharacteristic(characteristic);
    }

    if ((charaProp | BluetoothGattCharacteristic.PROPERTY_NOTIFY) > 0) {
        mNotifyCharacteristic = characteristic;
        bleService.setCharacteristicNotification(gatt, characteristic, true);
    }

    return true;
}

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From source file:com.nbplus.iotapp.bluetooth.BluetoothLeService.java

/**
 * Request a read on a given {@code BluetoothGattCharacteristic}. The read result is reported
 * asynchronously through the {@code BluetoothGattCallback#onCharacteristicRead(android.bluetooth.BluetoothGatt, android.bluetooth.BluetoothGattCharacteristic, int)}
 * callback./*ww w . j  a  va 2s .  c om*/
 *
 */
public boolean readCharacteristic(String address, String serviceUuid, String characteristicUuid) {
    Log.d(TAG, "readCharacteristic add = " + address + ", svc = " + serviceUuid + ", char = "
            + characteristicUuid);
    if (StringUtils.isEmptyString(address) || StringUtils.isEmptyString(serviceUuid)
            || StringUtils.isEmptyString(characteristicUuid)) {
        Log.w(TAG, "Unknown parameter");
        return false;
    }
    BluetoothGatt bluetoothGatt = mConnectedBluetoothGattMap.get(address);
    if (mBluetoothAdapter == null || bluetoothGatt == null) {
        Log.w(TAG, "BluetoothAdapter not initialized");
        return false;
    }
    BluetoothGattService service = bluetoothGatt.getService(UUID.fromString(serviceUuid));
    if (service == null) {
        Log.w(TAG, "Service not found.");
        return false;
    }
    BluetoothGattCharacteristic characteristic = service.getCharacteristic(UUID.fromString(characteristicUuid));
    if (characteristic == null) {
        Log.w(TAG, "characteristic not found.");
        return false;
    }
    boolean result = bluetoothGatt.readCharacteristic(characteristic);
    Log.d(TAG, "Read charac uuid = " + characteristic.getUuid().toString() + ", result = " + result);

    return result;
}

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