android - 尝试使用蓝牙代码...问题

Question

使用运行 cyanogenmod 7.03 的 HTC Desire 调试一些新的安卓蓝牙代码。我使用 BluetoothChat 项目最初只使用一个按钮打开/关闭蓝牙...

每次我添加影响 BluetoothAdapter 的东西时，应用程序都会关闭

例如mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
如果 (!mBluetoothAdapter.isEnabled())导致我的应用程序关闭

这是我的完整代码，来自 JocActivity.java - 我的主要且唯一的 java 文件:很多内容都被注释掉了，因为我一直在尝试不同的东西，但它基本上是这样设置的，当按下按钮时，就会查询蓝牙适配器。我正在尝试让 Logcat 工作，但它还没有告诉我太多信息:(有小费吗？我认为我的 SDK 可能兼容 2.2，但我的手机是 2.3.3我正在下载 2.3.3，但这里的速度很慢 :(

package test.joc;

import android.app.Activity;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.Toast;

public class JocActivity extends Activity implements OnClickListener{
    /** Called when the activity is first created. */

    // Debugging
    private static final String TAG = "joc";
    private static final boolean D = true;

    // Intent request codes
    private static final int REQUEST_CONNECT_DEVICE_SECURE = 1;
    private static final int REQUEST_CONNECT_DEVICE_INSECURE = 2;
    private static final int REQUEST_ENABLE_BT = 3;

    // Local Bluetooth adapter
    private BluetoothAdapter mBluetoothAdapter = null;


    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        Button button = (Button)findViewById(R.id.button1);
        button.setOnClickListener(this);

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

        // If the adapter is null, then Bluetooth is not supported
        if (mBluetoothAdapter == null) {
            Toast.makeText(this, "Bluetooth is not available", Toast.LENGTH_LONG).show();
            finish();
            return;
        }
    }

   /* @Override
    public void onStart() {
        super.onStart();
        if(D) Log.e(TAG, "++ ON START ++");

        // If BT is not on, request that it be enabled.
        // setupChat() will then be called during onActivityResult
        if (!mBluetoothAdapter.isEnabled()) {
            Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
        // Otherwise, setup the chat session
        } else {
            //if (mChatService == null) setupChat();
            Context context = getApplicationContext();
            CharSequence text = "Bluetooth enabled!";
            int duration = Toast.LENGTH_SHORT;
            Toast.makeText(context, text, duration).show();
        }
    }*/


 // Implement the OnClickListener callback
    public void onClick(View v) {
      // do something when the button is clicked
        Context context = getApplicationContext();
        int duration = Toast.LENGTH_SHORT;
        if(D) Log.e(TAG, "++ ON START ++");

        //BluetoothAdapter.enable();
        //Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        //InstanceOfAnActivity.startActivity(enableIntent);
        /*Intent btIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
        btIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
        context.startActivity(btIntent);*/

        // If BT is not on, request that it be enabled.
        // setupChat() will then be called during onActivityResult
        // Get local Bluetooth adapter
        mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
        if (!mBluetoothAdapter.isEnabled()) {/*
            Intent enableIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
            startActivityForResult(enableIntent, REQUEST_ENABLE_BT);
            Toast.makeText(context, "Bluetooth Enabled", duration).show();
        // Otherwise, setup the chat session
        } else {
            //if (mChatService == null) setupChat();*/
            Toast.makeText(context, "Ready", duration).show();
        }   
    }
}

Answer 1

您可能需要添加 bluetooth permission到你的 AndroidManifest.xml。但是请在 logcat/ddms 中检查堆栈跟踪。