android，如何获取包名？ [英] android, how to get package name?

问题描述

在我的应用程序中，我需要知道包名称的名称。我没有问题，当我想抓住它在活动，但我不能把它在其他类。以下代码在活动中工作，但我不知道为什么它在简单类中有问题。

  String packageName = getPackageName ; 
  

在我的班里，我试着写下这段代码：

 上下文上下文= getApplicationContext（）; 
 String packageName = context.getPackageName（）; 
  

但编译器说 getApplicationContext（）

解决方案

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简单或另一种方式是将Context传递到辅助类的构造函数中：

  MyClassConstructor {
 
 String packageName = context.getPackageName（）; 
} 
  

In my application I need to know the name of package name. I have no problem when I want to grab it in activities but i can't take it in other classes. Following code is working in activity but i don't know why it has problem in simple class.

String packageName = getPackageName();

In my class I tried to write this code:

Context context = getApplicationContext();
String packageName = context.getPackageName();

but compiler said getApplicationContext() method is undefined for this class.

How can I take package name within this class?

解决方案

The simple, or another way is to pass Context into the helper class constructor:

MyClassConstructor(Context context){

        String packageName = context.getPackageName(); 
}

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