将数据传递到已经具有来自活动的意图过滤器的广播接收器

Question

when the phone is connected to the bluetooth in the car. I want my app to switch on automatically. to do this i have to save the paired car bluetooth device name to a string. then when the phones bluetooth is connected to something. I have to check if its the car. If it is i want to start a service.

I'm having difficulty passing the string that contains the bluetooth car device name to the receiver, as my receiver is already receiving a intent filter to listen out for ACTION_ACL_CONNECTED. is it possible to send a intent & an intent filter to the same receiver.

How can I can send the btdeviceName string from the activity to the receiver in this case.

Main Activity

 private void addDrawerItems() {

    final BroadcastReceiver bluetoothBroadcast = new BluetoothReceiver();
    final IntentFilter blueToothFilter = new IntentFilter(BluetoothDevice.ACTION_ACL_CONNECTED);


    final Intent btbroadcastIntent = new Intent(this, BluetoothReceiver.class);
    btbroadcastIntent.putExtra("btDeviceName", mPairedBluetoothDevice);


    String[] osArray = {"Bluetooth Auto Start", "Reply to Calls", "Reply to sms", "Customise Message"};

    mAdapter = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_multiple_choice, osArray);


    if (mIsPremiumUser) {
        mDrawerList.setChoiceMode(AbsListView.CHOICE_MODE_MULTIPLE);
    } else {
        mDrawerList.setChoiceMode(AbsListView.CHOICE_MODE_NONE);
    }

    mDrawerList.setAdapter(mAdapter);


    mDrawerList.setOnItemLongClickListener(new AdapterView.OnItemLongClickListener() {
        @Override
        public boolean onItemLongClick(AdapterView<?> parent, View view, int position, long id) {


            if (position == 0) {
                Toast.makeText(getApplicationContext(), "blue", Toast.LENGTH_LONG).show();
                showBluetoothDialog();
            }
            return true;
        }
    });


    mDrawerList.setOnItemClickListener(new AdapterView.OnItemClickListener() {

        @Override
        public void onItemClick(AdapterView<?> parent, View view, int position, long id) {

            CheckedTextView ctv = (CheckedTextView) view;

            if (!mIsPremiumUser) {
                Toast.makeText(getApplication(), "Upgrade", Toast.LENGTH_LONG).show();
                return;
            }


            switch (position) {

                case 0:

                    if (ctv.isChecked()) {

                        if (!isblueToothRegistered) {
                            registerReceiver(bluetoothBroadcast, blueToothFilter);
                            sendBroadcast(btbroadcastIntent);
                            isblueToothRegistered = true;
                        }

                    } else {
                        if (isblueToothRegistered) {
                            unregisterReceiver(bluetoothBroadcast);
                            isblueToothRegistered = false;
                        }
                    }

                    break;

BluetoothReceiver

public class BluetoothReceiver extends BroadcastReceiver {

private MainActivity ma;
private String pairedDevice;


public void onReceive(Context context, Intent intent) {


    Toast.makeText(context, "Receieved", Toast.LENGTH_LONG).show();
    String action = intent.getAction();

    pairedDevice = intent.getStringExtra("btDeviceName");
    Toast.makeText(context, pairedDevice + "2", Toast.LENGTH_LONG).show();

    final BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);


    if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
        Toast.makeText(context, "Bluetooth Connected", Toast.LENGTH_LONG).show();


        if (device.getName().equals(pairedDevice)) {
            Toast.makeText(context, device.getName() + " 1", Toast.LENGTH_LONG).show();
        }


    } else if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
        Toast.makeText(context, "Bluetooth Disconnected", Toast.LENGTH_LONG).show();
    }


}

}

Answer 1

An IntentFilter can have multiple actions. So start by creating your own custom action name to listen for and add it to the blueToothFilter .

blueToothFilter.addAction("my.custom.action");

Once you register the bluetoothBroadcast receiver with this IntentFilter it will now receive calls for both actions. Add another condition in onReceive to handle your new custom action.

Finally in your Activity send a broadcast with your custom action and the device name when ready.

Intent intent = new Intent()
        .setAction("my.custom.action")
        .putExtra("btDeviceName", mPairedBluetoothDevice);

sendBroadcast(intent);

---

UPDATE

I now understand that you want both the BluetoothDevice device and String pairedDevice in a single call to onReceive() . That is not possible since those variables are taken from separate actions and each action calls onReceive() once.

To fix this you can change the BluetoothReceiver to be an inner class of your Activity so you can keep a reference to the data you need there.