Question

我正在尝试以编程方式打开蓝牙：

startActivityForResult( new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE) , 1);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
}

有时可行，但有时它会卡在“打开蓝牙”屏幕上。发生这种情况时，它永远不会达到onActivityResult()。

可能导致问题的原因是什么？

我正在使用API 10

Answer 1

使用defaultAdapter，然后在Intent调用中调用这些函数

BluetoothAdapter adapter=BluetoothAdapter.getDefaultAdapter();
//and to enable bluetooth just use
adapter.enable();
//and to disable bluetooth just use
adapter.disable();

Answer 2

我猜这段代码可能有用，

public void enableBT(View view){
BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (!mBluetoothAdapter.isEnabled()){
    Intent intentBtEnabled = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE); 
    // The REQUEST_ENABLE_BT constant passed to startActivityForResult() is a locally defined integer (which must be greater than 0), that the system passes back to you in your onActivityResult()  
    // implementation as the requestCode parameter.  
    int REQUEST_ENABLE_BT = 1;
    startActivityForResult(intentBtEnabled, REQUEST_ENABLE_BT);
    } }

不要忘记在android_manifest.xml中添加以下权限

<uses-permission android:name="android.permission.BLUETOOTH"/>

坚持打开蓝牙

2 个答案: