这是我第一次使用 fragment (android 开发新手),我正在尝试设置一个微调器。目前我对上下文很困惑,似乎无法解决这个错误:
Error:(52, 78) error: incompatible types: HotkeysFragment cannot be converted to Context
这是它所指的代码:
热键 fragment .java
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
Spinner hotkey_selector_spinner = (Spinner) rootView.findViewById(R.id.hotkey_selector_spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.hotkey_options, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
hotkey_selector_spinner.setAdapter(adapter);
}
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
final View rootViewB = inflater.inflate(R.layout.fragment_hotkeys, container, false);
rootView = rootViewB;
return rootViewB;
}
具体线路是:
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this,
R.array.hotkey_options, android.R.layout.simple_spinner_item);
进口:
import android.app.Activity;
import android.net.Uri;
import android.os.Bundle;
import android.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import java.util.zip.Inflater;
我怎样才能解决这个问题?
最佳答案
来自 here 的关于 Fragments 的 Android 文档:
所以,除了将 this
改为 getActivity()
之外,我还建议你在 getActivity()
中使用 onActivityCreated()
(因为你还需要先对 View 进行膨胀)
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
if (getArguments() != null) {
mParam1 = getArguments().getString(ARG_PARAM1);
mParam2 = getArguments().getString(ARG_PARAM2);
}
Spinner hotkey_selector_spinner = (Spinner) getView().findViewById(R.id.hotkey_selector_spinner);
ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getActivity(),
R.array.hotkey_options, android.R.layout.simple_spinner_item);
adapter.setDropDownViewResource(android.R.layout.simple_spinner_dropdown_item);
hotkey_selector_spinner.setAdapter(adapter);
}