[移动开发]修改 android 9 蓝牙配对弹窗

广播的发出地

/packages/apps/Bluetooth/src/com/android/bluetooth/btservice/BondStateMachine.java

    private void sendDisplayPinIntent(byte[] address, int pin, int variant) {
        Intent intent = new Intent(BluetoothDevice.ACTION_PAIRING_REQUEST);
        intent.putExtra(BluetoothDevice.EXTRA_DEVICE, mRemoteDevices.getDevice(address));
        if (pin != 0) {
            intent.putExtra(BluetoothDevice.EXTRA_PAIRING_KEY, pin);
        }
        intent.putExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, variant);
        intent.setFlags(Intent.FLAG_RECEIVER_FOREGROUND);
        // Workaround for Android Auto until pre-accepting pairing requests is added.
        intent.addFlags(Intent.FLAG_RECEIVER_INCLUDE_BACKGROUND);
        mAdapterService.sendOrderedBroadcast(intent, mAdapterService.BLUETOOTH_ADMIN_PERM);
    }

因为是有序广播，而且原生里的监听并没有设置优先级。

        <receiver android:name=".bluetooth.BluetoothPairingRequest">
            <intent-filter>
                <action android:name="android.bluetooth.device.action.PAIRING_REQUEST" />
            </intent-filter>
        </receiver>

所以我们就可以注册监听设置优先级来自己处理了

参照原生的写法
/packages/apps/Settings/src/com/android/settings/bluetooth/BluetoothPairingRequest.java：

public final class BluetoothPairingRequest extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent intent) {
        String action = intent.getAction();
        if (!action.equals(BluetoothDevice.ACTION_PAIRING_REQUEST)) {
            return;
        }

        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
        int type = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_VARIANT, BluetoothDevice.ERROR);
        int pairingKey = 0;
        if (type == BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION ||
                type == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY ||
                type == BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN) {
            pairingKey = intent.getIntExtra(BluetoothDevice.EXTRA_PAIRING_KEY,
                    BluetoothDevice.ERROR);
        }
        abortBroadcast();
        //TODO 这里进行弹窗即可
    }
}

配对的处理

/packages/apps/Settings/src/com/android/settings/bluetooth/BluetoothPairingDialog.java

1. 取消配对

                //取消配对
                device.setPhonebookAccessPermission(BluetoothDevice.ACCESS_REJECTED);
                device.setMessageAccessPermission(BluetoothDevice.ACCESS_REJECTED);
                try {
                    device.setPairingConfirmation(false);
                }catch (Exception e){
                    e.printStackTrace();
                }
                device.cancelPairingUserInput();
                device.cancelBondProcess();

2. 配对

                device.setPhonebookAccessPermission(BluetoothDevice.ACCESS_ALLOWED);
                device.setMessageAccessPermission(BluetoothDevice.ACCESS_ALLOWED);
                switch (type) {
		            case BluetoothDevice.PAIRING_VARIANT_PIN:
		            case BluetoothDevice.PAIRING_VARIANT_PIN_16_DIGITS:
		                byte[] pinBytes = BluetoothDevice.convertPinToBytes(passkey);
		                if (pinBytes == null) {
		                    return;
		                }
		                device.setPin(pinBytes);
		                break;
		
		            case BluetoothDevice.PAIRING_VARIANT_PASSKEY:
		                int pass = Integer.parseInt(passkey);
		                device.setPasskey(pass);
		                break;
		
		            case BluetoothDevice.PAIRING_VARIANT_PASSKEY_CONFIRMATION:
		            case BluetoothDevice.PAIRING_VARIANT_CONSENT:
		                device.setPairingConfirmation(true);
		                break;
		
		            case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PASSKEY:
		            case BluetoothDevice.PAIRING_VARIANT_DISPLAY_PIN:
		                // Do nothing.
		                break;
		
		            case BluetoothDevice.PAIRING_VARIANT_OOB_CONSENT:
		                device.setRemoteOutOfBandData();
		                break;
            		default:
        		}

3. 其他情况监听

    class MyReceiver extends BroadcastReceiver{

        public IntentFilter filter(){
            IntentFilter intentFilter = new IntentFilter("android.bluetooth.device.action.PAIRING_CANCEL");
            intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
            return intentFilter;
        }

        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            if (BluetoothDevice.ACTION_BOND_STATE_CHANGED.equals(action)) {
                int bondState = intent.getIntExtra(BluetoothDevice.EXTRA_BOND_STATE, BluetoothDevice.ERROR);
                if (bondState == BluetoothDevice.BOND_BONDED) {//配对成功
                    dismiss();
                }else if (bondState == BluetoothDevice.BOND_NONE){//对方取消/超时/自己超时
                    dismiss();
                }
            } else if ("android.bluetooth.device.action.PAIRING_CANCEL".equals(action)) {
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                //TODO 这里和弹窗里的不是一个设备如何处理？
            }
        }
    }

关于Dialog弹窗

       Window window = getWindow();
       //去除边距
       window.getDecorView().setPadding(0, 0, 0, 0);
       //去除暗淡和模糊效果
       window.clearFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND | WindowManager.LayoutParams.FLAG_DIM_BEHIND);
       WindowManager.LayoutParams lp = window.getAttributes();
       lp.flags = WindowManager.LayoutParams.FLAG_FULLSCREEN;
       lp.width = WindowManager.LayoutParams.MATCH_PARENT;
       lp.height = WindowManager.LayoutParams.MATCH_PARENT;
       window.setAttributes(lp);
       //让其不依赖 Activity
       window.setType(WindowManager.LayoutParams.TYPE_APPLICATION_OVERLAY);

设置主题供参考

    <style name="Theme.Dialog" parent="Theme.AppCompat.NoActionBar">
        <item name="android:windowNoTitle">true</item>
        <item name="android:windowIsFloating">false</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowFrame">@null</item>
        <item name="android:backgroundDimEnabled">false</item>
    </style>