Android DeadObjectException :writeCharacteristic、、DeadObjectException、

Question

我扫描了蓝牙，链接并发送了启动蓝牙设备测量功能的指令，发现了以下错误：

03-15 11:12:44.903 22685-22685/com.homehealth.bluetooth_one E/BluetoothGatt: android.os.DeadObjectException
  at android.os.BinderProxy.transact(Native Method)
  at android.bluetooth.IBluetoothGatt$Stub$Proxy.writeCharacteristic(IBluetoothGatt.java:933)
  at android.bluetooth.BluetoothGatt.writeCharacteristic(BluetoothGatt.java:952)
  at com.homehealth.bluetooth_one.BluetoothLeService.wirteCharacteristic(BluetoothLeService.java:283)
  at 

当我将蓝牙连接到我的手机时，我想要发送CMD到蓝牙设备并获取特征。我使用的方法是mBluetoothGatt.writeCharacteristic(characteristic)，mBluetoothGatt.readCharacteristic(characteristic)，mBluetoothGatt.setCharacteristicNotification(characteristic, enabled)，It is error。myCode：

活动：

if (uuid.contains("fff3")){
    mBluetoothLeService.wirteCharacteristic(gattCharacteristic);
    mBluetoothLeService.setCharacteristicNotification(gattCharacteristic, true);
    mBluetoothLeService.readCharacteristic(gattCharacteristic);
}

服务类别为：

public void wirteCharacteristic(BluetoothGattCharacteristic characteristic) {
    if (mBluetoothAdapter == null || mBluetoothGatt == null) {
        Log.w(TAG, "BluetoothAdapter not initialized");
        return;
    }
    boolean success = mBluetoothGatt.writeCharacteristic(characteristic);
    if (success) Log.i(TAG,"wirteCharacteristic successful");
}
public void readCharacteristic(BluetoothGattCharacteristic characteristic) {
    if (mBluetoothAdapter == null || mBluetoothGatt == null) {
        Log.w(TAG, "BluetoohAdapter not initialized");
        return;
    }
    Log.i(TAG,"readCharacteristic UUID="+characteristic.getUuid().toString());
   boolean success =  mBluetoothGatt.readCharacteristic(characteristic);
    if (success) Log.i(TAG,"readCharacteristic successful");
}
public void setCharacteristicNotification(BluetoothGattCharacteristic characteristic,
                                          boolean enabled) {
    if (mBluetoothAdapter == null || mBluetoothGatt == null) {
        Log.w(TAG, "BluetoothAdapter not initialized");
        return;
    }

    boolean successful = mBluetoothGatt.setCharacteristicNotification(characteristic, enabled);
    mBluetoothGatt.writeCharacteristic(characteristic);
    if (successful) {

        Log.i(TAG,"setCharacteristicNotification successful");


        BluetoothGattDescriptor descriptor = characteristic.getDescriptor(characteristic.getUuid());
        if (null == descriptor) {

            Log.e(TAG, "descriptor is null,or UUID is invalid  uuid=" + characteristic.getUuid());
            return;
        }
        descriptor.setValue(BluetoothGattDescriptor.ENABLE_NOTIFICATION_VALUE);
        mBluetoothGatt.writeDescriptor(descriptor);
    }
}

Answer 1

这就是mBluetoothGatt.writeCharacteristic(characteristic).的问题特征不是设置值。

正确的代码是：

characteristic.setValue(bytes);
mBluetoothGatt.writeCharacteristic(characteristic);