android - 飞行模式验证 No class Def

Question

此代码生成以下错误。有谁知道为什么？谢谢!

java.lang.NoClassDefFoundError: android.provider.Settings$Global

@SuppressLint( "NewApi" )
@SuppressWarnings("deprecation")
public boolean isAirplaneModeOn(Context context) {

    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN){
        return Settings.Global.getInt(context.getContentResolver(),
           Settings.Global.AIRPLANE_MODE_ON, 0) != 0; //<--Error here
    } else {
        return Settings.System.getInt(context.getContentResolver(),
               Settings.System.AIRPLANE_MODE_ON, 0) != 0;
    }

}

Answer 1

您应该检查以下内容:

if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN_MR1){

因为该类是在 API 级别 17 中引入的，即 Build.VERSION_CODES.JELLY_BEAN_MR1。或者你可以这样做:

if(Build.VERSION.SDK_INT > Build.VERSION_CODES.JELLY_BEAN){