将数据传递给已经具有来自 activity 的 Intent 过滤器的广播接收器

pass data to broadcast receiver that already has intent filter coming from activity

当phone连接到车内的蓝牙时。我希望我的应用程序自动打开。为此,我必须将配对的汽车蓝牙设备名称保存到一个字符串中。然后当 phones 蓝牙连接到某物时。我必须检查它是否是汽车。如果是,我想启动一项服务。

我很难将包含蓝牙汽车设备名称的字符串传递给接收器,因为我的接收器已经在接收一个 intent 过滤器来监听 ACTION_ACL_CONNECTED。是否可以将意图和意图过滤器发送到同一个接收者。

在这种情况下,如何将 btdeviceName 字符串从 activity 发送到接收方。

主要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;

蓝牙接收器

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();
    }


}

}

一个IntentFilter可以有多个动作。因此,首先创建您自己的自定义操作名称来监听并将其添加到 blueToothFilter.

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

一旦您使用此 IntentFilter 注册 bluetoothBroadcast 接收器,它现在将接收两个操作的调用。在 onReceive 中添加另一个条件来处理您的新自定义操作。

最后在您的 Activity 中发送一个广播,其中包含您的自定义操作和准备就绪后的设备名称。

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

sendBroadcast(intent);

更新

我现在了解到您希望 BluetoothDevice deviceString pairedDevice 一次调用 onReceive()。这是不可能的,因为这些变量是从单独的操作中获取的,并且每个操作调用一次 onReceive()

要解决此问题,您可以将 BluetoothReceiver 更改为 Activity 的内部 class,这样您就可以保留对所需数据的引用。