有没有机会在新线程中简单地调用方法？

Question

我的问题是，当我运行 android 应用程序时，如果打印机处于离线状态，此方法需要一分钟才能运行。我想运行它在后台的另一个线程上，并且原始线程可以运行不间断。感谢您的任何建议，祝编码愉快！

public class MainActivity extends WebView {
public PrinterManager printerManager;
public final int REQUEST_COARSE_LOCATION_PERMISSIONS = 52;
private JSPlugin plugin;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
    registerReceiver(mBluetoothReceiver, filter);
}

@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
    switch (requestCode) {
        case REQUEST_COARSE_LOCATION_PERMISSIONS: {
            if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                //printerManager.connectDefaultPrinter(0);
                //printerManager.connectDefaultPrinter(1);

                printerManager.connectAll(); <----- This method call i want to do in new thread
            } else {
                Toast.makeText(this,
                        "NO Bluetooth RIGHTS",
                        Toast.LENGTH_LONG).show();
            }
            return;
        }
    }
}

Answer 1

您可以简单地创建一个 Thread 对象并将您的方法放入其中。
这里的代码适用于您的案例：

public class MainActivity extends WebView {
    public PrinterManager printerManager;
    public final int REQUEST_COARSE_LOCATION_PERMISSIONS = 52;
    private JSPlugin plugin;
    
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        IntentFilter filter = new IntentFilter(BluetoothAdapter.ACTION_STATE_CHANGED);
        registerReceiver(mBluetoothReceiver, filter);
    }
    
    @Override
    public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
        switch (requestCode) {
            case REQUEST_COARSE_LOCATION_PERMISSIONS: {
                if (grantResults.length == 1 && grantResults[0] == PackageManager.PERMISSION_GRANTED) {
                    ConnectingThread connectingThread = new ConnectingThread();
                    connectingThread.start();
                } else {
                    Toast.makeText(this, "NO Bluetooth RIGHTS", Toast.LENGTH_LONG).show();
                }
                return;
            }
        }
    }

    private class ConnectingThread extends Thread {
    
        public ConnectingThread() {
        }
    
        public void run() {
            // You can set a low priority, if you want, using:
            //Thread.currentThread().setPriority(Thread.MIN_PRIORITY);
            printerManager.connectAll();
        }
    }
}

根据您的管理需要，您可以决定将connectingThread 的定义放在不同的位置。

有没有机会在新线程中简单地调用方法？

Is there any chance to simply call method in new thread?

java

multithreading

android