Question

由于setadapter功能的原因，应用程序不断崩溃我的最终目标是拥有一个连接到蓝牙的程序，并显示一个可以点击配对的蓝牙设备的列表视图。我经历了很多教程和论坛，无法让它发挥作用。任何正确方向的帮助将不胜感激。谢谢 //我的主要代码是：

import android.app.AlertDialog;
import android.app.ListActivity;
import android.app.ListFragment;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.recyclerview.extensions.ListAdapter;
import android.widget.ArrayAdapter;
import android.widget.ExpandableListView;
import android.widget.ListView;
import android.widget.TextView;

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


public class MainActivity extends AppCompatActivity {
public static int Request_Bluetooth = 1;
int bt = 1;
public ArrayList<BluetoothDevice> btDevices = new ArrayList<>();
ListView newDevices;
TextView tvDeviceName;
BluetoothAdapter Bluetooth;



@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.content_main);
    Bluetooth = BluetoothAdapter.getDefaultAdapter();
    newDevices = (ListView) findViewById(R.id.newDevices);
    tvDeviceName = (TextView) findViewById(R.id.tvDeviceName);
    btDevices = new ArrayList<>();

    if(Bluetooth == null){
        new AlertDialog.Builder(this)
                .setTitle("Bluetooth")
                .setMessage("This device does not support Bluetooth")
                .setPositiveButton("Main Menu",
                        new DialogInterface.OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {

                                System.exit(0);
                            }
                        })
                .setIcon(android.R.drawable.ic_dialog_alert)
                .show();
    }
    if (!Bluetooth.isEnabled()){
        Intent enable = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        startActivityForResult(enable, Request_Bluetooth);

    }
    Intent discoverable = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
    discoverable.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,1000);
    startActivity(discoverable);

    Set<BluetoothDevice> pairedDevices = Bluetooth.getBondedDevices();
    ArrayAdapter<String> s = new ArrayAdapter<String>(this, android.R.layout.simple_list_item_1, R.id.newDevices);
    for(BluetoothDevice bt : pairedDevices) {
        s.add(bt.getName());
        //Used to check that the devices are being captured 
       // tvDeviceName.append("\n Device:" + bt.getName() + ", " +bt);


    }
    newDevices.setAdapter(s);


}


}

请帮忙

我正在尝试生成已配对的蓝牙设备的可点击列表视图

0 个答案: