How Can I Return a Boolean Value from an Android AsyncTask?

Returning a Boolean from AsyncTask

In Android development, it may be necessary to return a boolean value from an asynchronous task performed by AsyncTask. This is useful in situations where you need to determine the success or failure of a specific operation.

To return a boolean from AsyncTask, you can implement a callback interface. Here's how to do it:

1. Create a callback interface: Define an interface with a method that accepts a boolean parameter, representing the result of the task.

public interface MyInterface {
    public void myMethod(boolean result);
}

2. Pass the callback interface to AsyncTask: When creating your AsyncTask, pass the callback interface as an argument.

public class AsyncConnectTask extends AsyncTask<Void, Void, Boolean> {

    private MyInterface mListener;

    public AsyncConnectTask(Context context, String address, String user,
        String pass, int port, MyInterface mListener) {
        mContext = context;
        _address = address;
        _user = user;
        _pass = pass;
        _port = port;
        this.mListener = mListener;
    }

    // ... (Rest of the AsyncTask code)
}

3. Implement the callback method in the parent activity: In the parent activity or fragment that initiated the AsyncTask, implement the callback method defined in the interface.

AsyncConnectTask task = new AsyncConnectTask(SiteManager.this,
                        _address, _username, _password, _port,  new MyInterface() {
    @Override
    public void myMethod(boolean result) {
        if (result == true) {
            Toast.makeText(SiteManager.this, "Connection Succesful",
            Toast.LENGTH_LONG).show();
        } else {
            Toast.makeText(SiteManager.this, "Connection Failed:" + status, Toast.LENGTH_LONG).show();
        }
    }
});

task.execute();

By following these steps, you can effectively return a boolean value from an AsyncTask and handle the result accordingly.

The above is the detailed content of How Can I Return a Boolean Value from an Android AsyncTask?. For more information, please follow other related articles on the PHP Chinese website!