我试图实现了Android样本中给出的蓝牙聊天的例子。 我拥有的Android 4.1版本上运行一个糖豆设备上运行它。
该应用程序只是强制关闭。 的发射活动的发射活动代码的一部分是这样的。
当我注释的行“mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter（）;” 应用程序不强制关闭。 和所有的吐司消息也被显示，其不与线未注释
private BluetoothAdapter mBluetoothAdapter = null;
// Member object for the chat services
private BluetoothChatService mChatService = null;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
Toast.makeText(getApplicationContext(),"BluetothChat oncreate()", Toast.LENGTH_LONG).show();
if(D) Log.e(TAG, "+++ ON CREATE +++");
// Set up the window layout
setContentView(R.layout.main);
// Get local Bluetooth adapter
try {
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;
}
} catch (Exception e) {
Toast.makeText(this,e.toString(), Toast.LENGTH_LONG).show();
}
}
@Override
public void onStart() {
Toast.makeText(getApplicationContext(),"BluetothChat onstart()", Toast.LENGTH_LONG).show();
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
try {
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();
}
}
} catch (Exception e) {
Toast.makeText(this,e.toString(), Toast.LENGTH_LONG).show();
}
}
