如何将BluthoothGatt数据发送到另一个活动

Question

如何将BluetoothGatt数据发送到另一个活动。

在android studio中，我尝试连接BLE设备，尝试了Intent.putExtra，但无法解决。

btn2.setOnClickListener(new View.OnClickListener() {
        @RequiresApi(api = Build.VERSION_CODES.LOLLIPOP)
        @Override
        public void onClick(View v) {
            btn1.setBackground(getDrawable(R.drawable.buttonshape));
            btn2.setBackground(getDrawable(R.drawable.underline));
            btn3.setBackground(getDrawable(R.drawable.buttonshape));
            Intent intent = new Intent(getApplicationContext(), LEDActivity.class);
            intent.putExtra("connected", connected_);
            Intent intent1 = new Intent(SettingActivity.this, LEDActivity.class);
            **intent1.putExtra("blegatt", ble_gatt_.getDevice());
            //intent1.putExtra("blegatt", String.valueOf(ble_gatt_));**
            startActivity(intent);
            overridePendingTransition(R.anim.slide_in_right, R.anim.slide_out_left);
        }
    }



private void sendData( View v ) {
    // check connection
    Intent intent = getIntent();
    boolean connected = intent.getBooleanExtra("connected", false);
    **BluetoothGatt ble_gatt = intent.getParcelableExtra("blegatt");**
    //BluetoothGatt ble_gatt = getIntent().getExtras().getParcelable("blegatt");
    Toast.makeText(this,"ble_gatt_ -> " + ble_gatt, Toast.LENGTH_LONG).show();
    if ( !connected ) {
        Log.e( TAG, "Failed to sendData due to no connection" );
        return;
    }
    // find command characteristics from the GATT server
    BluetoothGattCharacteristic cmd_characteristic= BluetoothUtils.findCommandCharacteristic( ble_gatt );
    // disconnect if the characteristic is not found
    if( cmd_characteristic == null ) {
        Log.e( TAG, "Unable to find cmd characteristic" );
        set_.disconnectGattServer();
        return;
    }
    // start stimulation
    startStimulation( cmd_characteristic, 1 );
}

我希望完美地传递BluetoothGatt的数据，但实际我的代码传递null