无法在Android中解析ContextCompat [英] Cannot Resolve ContextCompat in Android

问题描述

我有一个名为dialog的AlertDialogue对象。我正在尝试添加一个图标。我看到现在不推荐使用这种语法：

  dialog.setIcon（getResources（）。getDrawable（R.drawable.myImage）; 
  

我到处读到这应该有用：

  dialog.setIcon（ContextCompat.getDrawable（context，R.drawable.myImage））; 
  

然而，Android Studio无法识别ContextCompat语法。我应该导入一些东西吗？谢谢。

***更新：感谢@Sharj下面的正确答案。如果你们需要视觉，我也制作了一个快速视频： https://www.youtube.com/watch?v=eFiaO0srQro&feature=youtu.be

解决方案

ContextCompat 是支持的一部分library v4。你添加了支持库吗？ 4你的项目？

  android.support.v4.content.ContextCompat 
  

如果你还没有

你可以在app文件夹下的build.gradle文件中包含支持库pre> 依赖项{
//其他东西在这里
编译'com.android.support:support-v4:23.0.0'
//更新23.0.0到最新版本

}


I have an AlertDialogue object called dialog. I am attempting to add an icon to it. I see that this syntax is now deprecated:

dialog.setIcon(getResources().getDrawable(R.drawable.myImage);

I'm reading everywhere that this should work:

dialog.setIcon(ContextCompat.getDrawable(context, R.drawable.myImage));

However, the ContextCompat syntax is not being recognized by Android Studio. Is there something that I should be importing? Thank you.

***Update: Thank's to @Sharj for the correct answer below. I made a quick video too if you guys need a visual: https://www.youtube.com/watch?v=eFiaO0srQro&feature=youtu.be

解决方案

ContextCompat is part of support library v4. Have you added support library 4 to your project?

android.support.v4.content.ContextCompat

You can include support library to your build.gradle file under app folder if you haven't already

dependencies {
// other stuff here
    compile 'com.android.support:support-v4:23.0.0'
// update the 23.0.0 to latest version available

}

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