Android Studio 蓝牙配对

代码片段

activity

package com.example.day10_2;

import android.Manifest;
import android.annotation.SuppressLint;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Parcelable;
import android.support.annotation.NonNull;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.Button;
import android.widget.ListView;

import com.example.day10.R;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;

public class Main2Activity extends AppCompatActivity implements View.OnClickListener {
    List<BluetoothDevice> list;
    MyAdapter myAdapter;
    BluetoothAdapter bluetoothAdapter;
    BluetoothManager bluetoothManager;
    BluetoothReceiver bluetoothReceiver;

    Button start, stop, search;
    ListView lv;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);

        initView();
        request();
        initDate();
    }

    public void initDate() {
        bluetoothManager = (BluetoothManager) getSystemService(BLUETOOTH_SERVICE);
        bluetoothAdapter = bluetoothManager.getAdapter();
        if (bluetoothAdapter == null) {
            finish();
            return;
        }
        bluetoothReceiver = new BluetoothReceiver();
        IntentFilter intentFilter = new IntentFilter();
        intentFilter.addAction(BluetoothDevice.ACTION_FOUND);
        intentFilter.addAction(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
        intentFilter.addAction(BluetoothDevice.ACTION_BOND_STATE_CHANGED);
        registerReceiver(bluetoothReceiver, intentFilter);
    }

    public void initView() {
        start = findViewById(R.id.start);
        stop = findViewById(R.id.stop);
        search = findViewById(R.id.serach);
        lv = findViewById(R.id.list);
        list = new ArrayList<>();

        start.setOnClickListener(this);
        stop.setOnClickListener(this);
        search.setOnClickListener(this);

        myAdapter = new MyAdapter(list);
        lv.setAdapter(myAdapter);

        lv.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                try {
                    Method method = BluetoothDevice.class.getMethod("createBond");
                    method.invoke(list.get(position));
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public void request() {
        if (Build.VERSION.SDK_INT > Build.VERSION_CODES.M) {
            int i = checkSelfPermission(Manifest.permission.BLUETOOTH);
            int i2 = checkSelfPermission(Manifest.permission.BLUETOOTH_ADMIN);
            int i3 = checkSelfPermission(Manifest.permission.ACCESS_COARSE_LOCATION);

            int granted = PackageManager.PERMISSION_GRANTED;
            if (i != granted || i2 != granted || granted != i3) {
                String[] permiss = {Manifest.permission.BLUETOOTH, Manifest.permission.BLUETOOTH_ADMIN, Manifest.permission.ACCESS_COARSE_LOCATION};
                requestPermissions(permiss, 100);
            }
        }
    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
        if (requestCode == 100) {
            if (grantResults[0] != PackageManager.PERMISSION_GRANTED) {

            }
        }
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.start:
                boolean enable = bluetoothAdapter.enable();
                if (!enable) {
                    Intent intent = new Intent();
                    intent.setAction(BluetoothAdapter.ACTION_REQUEST_ENABLE);
                    intent.setAction(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
                    intent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 200);
                }
                break;
            case R.id.stop:
                bluetoothAdapter.disable();
                list.clear();
                myAdapter.notifyDataSetChanged();
                break;
            case R.id.serach:
                bluetoothAdapter.startDiscovery();
                break;
        }
    }

    public class BluetoothReceiver extends BroadcastReceiver {
        @Override
        public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            switch (action) {
                case BluetoothDevice.ACTION_BOND_STATE_CHANGED:
                    BluetoothDevice bluetoothDevice = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    int state = bluetoothDevice.getBondState();
                    if (state == BluetoothDevice.BOND_BONDED) {
                        Log.e("###", "连接成功");
                    }

                    break;
                case BluetoothDevice.ACTION_FOUND:
                    BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                    list.add(device);
                    myAdapter.notifyDataSetChanged();
                    break;
                case BluetoothAdapter.ACTION_DISCOVERY_FINISHED:
                    myAdapter.notifyDataSetChanged();
                    break;
            }
        }
    }
}

ListView适配器

package com.example.day10_2;

import android.bluetooth.BluetoothDevice;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import com.example.day10.R;

import java.util.ArrayList;
import java.util.List;

class MyAdapter extends BaseAdapter {
    List<BluetoothDevice> list;

    public MyAdapter(List<BluetoothDevice> list) {
        this.list = list;
    }

    @Override
    public int getCount() {
        return list.size();
    }

    @Override
    public Object getItem(int position) {
        return null;
    }

    @Override
    public long getItemId(int position) {
        return position;
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        ViewHolder viewHolder;
        if (convertView == null) {
            viewHolder = new ViewHolder();
            convertView = View.inflate(parent.getContext(), R.layout.list, null);
            viewHolder.name = convertView.findViewById(R.id.name);
            viewHolder.address = convertView.findViewById(R.id.address);
            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
            viewHolder.name.setText(list.get(position).getName());
            viewHolder.address.setText(list.get(position).getAddress());
        }
        return convertView;
    }

    public class ViewHolder {
        TextView name;
        TextView address;
    }
}