安卓：从值传递字符串数组的.java [英] Android: Pass string array from values to .java

问题描述

我用这code从我的价值观夹拉我的字符串数组：

I am using this code to pull my string array from my values folder:

String achievementNames[] = getResources().getStringArray(R.array.achieveString);
    String achievementDescriptions[] = getResources().getStringArray(R.array.achieveDescript);

然而，当我运行它，它给我的code的那些行空指针异常。有没有更好的办法来拉字符串数组或者是有我的code错误？

However, when I run this, it gives me a null pointer exception on those lines of code. Is there a better way to pull string arrays or is there an error in my code?

推荐答案

您应该不叫 getResources（）除非的onCreate（）回调被触发。

You shouldn't call getResources() unless onCreate() callback has been triggered.

public class StackStackActivity extends Activity 
{

    String[] myArray = getResources().getStringArray(R.array.glenns); // This returns null

    public StackStackActivity()
    {

        myArray = getResources().getStringArray(R.array.glenns); // This returns null also
    }

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

        myArray = getResources().getStringArray(R.array.glenns); // Returns an array from resources
    }
}

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