即使使用上下文也无法引用findViewbyId（）

Roymunson 发表于 Dev

罗蒙森

在我的oncreate方法中，我有：

     @Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.game_activity);
    mContext = this;
}

mContextContext对于整个类都是静态的。

但是，即使我这样做，我也无法做到这一点：

mContext.findViewById(R.id.score_text);

它说它无法解析方法“ findViewbyId”

我究竟做错了什么？

常用软件

mContext是整个类的静态Context

请删除此。

我究竟做错了什么？

findViewById()是对一个方法Activity和Fragment。这不是的方法Context。

由于您正在调用setContentView()，因此您的onCreate()方法处于活动状态，因此您只需调用findViewById()：

/***
  Copyright (c) 2012 CommonsWare, LLC
  Licensed under the Apache License, Version 2.0 (the "License"); you may not
  use this file except in compliance with the License. You may obtain a copy
  of the License at http://www.apache.org/licenses/LICENSE-2.0. Unless required
  by applicable law or agreed to in writing, software distributed under the
  License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS
  OF ANY KIND, either express or implied. See the License for the specific
  language governing permissions and limitations under the License.

  From _The Busy Coder's Guide to Android Development_
    https://commonsware.com/Android
*/

package com.commonsware.android.extra;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class OtherActivity extends Activity {
  public static final String EXTRA_MESSAGE="msg";

  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.other);

    TextView tv=(TextView)findViewById(R.id.msg);

    tv.setText(getIntent().getStringExtra(EXTRA_MESSAGE));
  }
}