package com.sundaymorning.slideshowremotecontrol.activity;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.databinding.DataBindingUtil;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.TextView;

import com.sundaymorning.slideshowremotecontrol.R;
import com.sundaymorning.slideshowremotecontrol.databinding.ActivityDeviceListBinding;

import java.util.Set;

/**
 * This Activity appears as a dialog. It lists any paired devices and
 * devices detected in the area after discovery. When a device is chosen
 * by the user, the MAC address of the device is sent back to the parent
 * Activity in the result Intent.
 */
public class DeviceListActivity extends Activity {

    private ActivityDeviceListBinding mActivityDeviceListBinding;

    /**
     * Tag for Log
     */
    private static final String TAG = "DeviceListActivity";

    /**
     * Return Intent extra
     */
    public static String EXTRA_DEVICE_ADDRESS = "device_address";

    /**
     * Member fields
     */
    private BluetoothAdapter mBtAdapter;

    /**
     * Newly discovered devices
     */
    private ArrayAdapter<String> mNewDevicesArrayAdapter;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        // Setup the window
        requestWindowFeature(Window.FEATURE_INDETERMINATE_PROGRESS);
        mActivityDeviceListBinding = DataBindingUtil.setContentView(this, R.layout.activity_device_list);

        // Set result CANCELED in case the user backs out
        setResult(Activity.RESULT_CANCELED);

        // Initialize the button to perform device discovery
        mActivityDeviceListBinding.btnScan.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                doDiscovery();
                v.setVisibility(View.GONE);
            }
        });

        // Initialize array adapters. One for already paired devices and
        // one for newly discovered devices
        ArrayAdapter<String> pairedDevicesArrayAdapter = new ArrayAdapter<>(this, R.layout.device_name);
        mNewDevicesArrayAdapter = new ArrayAdapter<>(this, R.layout.device_name);

        // Find and set up the ListView for paired devices
        mActivityDeviceListBinding.pairedDevices.setAdapter(pairedDevicesArrayAdapter);
        mActivityDeviceListBinding.pairedDevices.setOnItemClickListener(mDeviceClickListener);

        // Find and set up the ListView for newly discovered devices
        mActivityDeviceListBinding.newDevices.setAdapter(mNewDevicesArrayAdapter);
        mActivityDeviceListBinding.newDevices.setOnItemClickListener(mDeviceClickListener);

        // Register for broadcasts when a device is discovered
        IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);
        this.registerReceiver(mReceiver, filter);

        // Register for broadcasts when discovery has finished
        filter = new IntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
        this.registerReceiver(mReceiver, filter);

        // Get the local Bluetooth adapter
        mBtAdapter = BluetoothAdapter.getDefaultAdapter();

        // Get a set of currently paired devices
        Set<BluetoothDevice> pairedDevices = mBtAdapter.getBondedDevices();

        // If there are paired devices, add each one to the ArrayAdapter
        if (pairedDevices.size() > 0) {
            mActivityDeviceListBinding.titlePairedDevices.setVisibility(View.VISIBLE);
            for (BluetoothDevice device : pairedDevices) {
                pairedDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
            }
        } else {
            String noDevices = getResources().getText(R.string.none_paired).toString();
            pairedDevicesArrayAdapter.add(noDevices);
        }
    }

    @Override
    protected void onDestroy() {
        super.onDestroy();

        // Make sure we're not doing discovery anymore
        if (mBtAdapter != null) {
            mBtAdapter.cancelDiscovery();
        }

        // Unregister broadcast listeners
        this.unregisterReceiver(mReceiver);
    }

    /**
     * Start device discover with the BluetoothAdapter
     */
    private void doDiscovery() {
        Log.d(TAG, "doDiscovery()");

        // Indicate scanning in the title
        setProgressBarIndeterminateVisibility(true);
        setTitle(R.string.scanning);

        // Turn on sub-title for new devices
        mActivityDeviceListBinding.titleNewDevices.setVisibility(View.VISIBLE);

        // If we're already discovering, stop it
        if (mBtAdapter.isDiscovering()) {
            mBtAdapter.cancelDiscovery();
        }

        // Request discover from BluetoothAdapter
        mBtAdapter.startDiscovery();
    }

    /**
     * The on-click listener for all devices in the ListViews
     */
    private AdapterView.OnItemClickListener mDeviceClickListener = new AdapterView.OnItemClickListener() {
        public void onItemClick(AdapterView<?> av, View v, int arg2, long arg3) {
            // Cancel discovery because it's costly and we're about to connect
            mBtAdapter.cancelDiscovery();

            // Get the device MAC address, which is the last 17 chars in the View
            String info = ((TextView) v).getText().toString();
            String address = info.substring(info.length() - 17);

            // Create the result Intent and include the MAC address
            Intent intent = new Intent();
            intent.putExtra(EXTRA_DEVICE_ADDRESS, address);

            // Set result and finish this Activity
            setResult(Activity.RESULT_OK, intent);
            finish();
        }
    };

    /**
     * The BroadcastReceiver that listens for discovered devices and changes the title when
     * discovery is finished
     */
    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();

            // When discovery finds a device
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                // Get the BluetoothDevice object from the Intent
                BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                // If it's already paired, skip it, because it's been listed already
                if (device.getBondState() != BluetoothDevice.BOND_BONDED) {
                    mNewDevicesArrayAdapter.add(device.getName() + "\n" + device.getAddress());
                }
                // When discovery is finished, change the Activity title
            } else if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
                setProgressBarIndeterminateVisibility(false);
                setTitle(R.string.select_device);
                if (mNewDevicesArrayAdapter.getCount() == 0) {
                    String noDevices = getResources().getText(R.string.none_found).toString();
                    mNewDevicesArrayAdapter.add(noDevices);
                }
            }
        }
    };

}

@@ -2668,103 +2668,8 @@
 er);
-%0A        mActivityDeviceListBinding.pairedDevices.setOnItemClickListener(mDeviceClickListener);
 %0A%0A  
@@ -2821,100 +2821,8 @@
 er);
-%0A        mActivityDeviceListBinding.newDevices.setOnItemClickListener(mDeviceClickListener);
 %0A%0A  
@@ -3792,32 +3792,131 @@
 ;%0A            %7D%0A
+            mActivityDeviceListBinding.pairedDevices.setOnItemClickListener(mDeviceClickListener);%0A
         %7D else %7B
@@ -4050,32 +4050,115 @@
 add(noDevices);%0A
+            mActivityDeviceListBinding.pairedDevices.setOnItemClickListener(null);%0A
         %7D%0A    %7D%0A
@@ -7237,24 +7237,112 @@
 t() == 0) %7B%0A
+                    mActivityDeviceListBinding.newDevices.setOnItemClickListener(null);%0A
             
@@ -7476,32 +7476,161 @@
 add(noDevices);%0A
+                %7D else %7B%0A                    mActivityDeviceListBinding.newDevices.setOnItemClickListener(mDeviceClickListener);%0A
                 

Fix app crashes