将数据从Activity发送到Fragment会返回错误

Question

我使用此链接中的Bundle方法：https://stackoverflow.com/a/21102881/2641960

但我遇到了这个错误：

 -15 11:14:47.323    8558-8558/co.kssg.expertnote E/InputEventReceiver﹕      Exception dispatching input event.
 04-15 11:14:47.323    8558-8558/co.kssg.expertnote E/MessageQueue-JNI﹕      Exception in MessageQueue callback: handleReceiveCallback
 04-15 11:14:47.333    8558-8558/co.kssg.expertnote E/MessageQueue-JNI﹕      java.lang.IllegalStateException: Activity has been destroyed

以下是将数据包发送到片段的方法：

public void sendDataToFragment (String data)
{
    Bundle bundle = new Bundle();
    MainActivity ac = new MainActivity();
    FragmentManager fManager = ac.getFragmentManager();
    FragmentTransaction transaction = fManager.beginTransaction();
    bundle.putString("message", data );
    DataFragment dataFragment = new DataFragment();
    dataFragment.setArguments(bundle);
    transaction.replace(R.id.sFLayout, dataFragment);
    transaction.commit();
}

此方法放在自定义ImageView类中。

感谢您的帮助。

Answer 1

我认为这MainActivity ac = new MainActivity();无效。

您应该在ImageView类的构造函数中添加一个引用，如下所示：

public class ImageView {
    private Activity mainActivity;

    public void ImageView(Activity mainActivity) {
        this.mainActivity = mainActivity;
    }

    public void sendDataToFragment (String data){
        Bundle bundle = new Bundle();
        FragmentManager fManager = mainActivity.getFragmentManager();
        FragmentTransaction transaction = fManager.beginTransaction();
        bundle.putString("message", data );
        DataFragment dataFragment = new DataFragment();
        dataFragment.setArguments(bundle);
        transaction.replace(R.id.sFLayout, dataFragment);
        transaction.commit();
    }
}