Question

基本上我想在超出下面的类y后发出警报声。我有这个课程，我已将Context作为参数传递：

public class Point {

  private Context context;
  private int x;
  private int y;

public Point( Context context, int x, int y)
{
    this.context=context;
    this.x = x;
    this.y = y;

    if(y>30000){
        Uri notification = RingtoneManager.getDefaultUri(RingtoneManager.TYPE_NOTIFICATION);
        MediaPlayer mp = MediaPlayer.create(context, notification);
        mp.start();
    }
}

public int getX() {
    return x;
}

public int getY() {
    return y;
  }

}

我真的不知道如何在这个类中返回Context，它有一个返回上面类中构造函数Point的方法（它调用Point类）但是这是我试过的：

public class UbidotsData {

 public static Point getDataFromReceiver(int x)
{
    ApiClient api = new ApiClient("A1E-0d8bec822d9d5ccae0fb08a75dfdb22e17c3");
    Variable ldr = api.getVariable("5a5f80eec03f971388983b8e");
    Value[] values = ldr.getValues();
    int newValue = (int) values[0].getValue();

    return new Point(Context.getContext,x, newValue); //error "cannot resolve symbol 'getContext'" occurs here
    }
}

这是Context.java类：

public class Context extends Application {

 public static Context mcontext;

 public void onCreate() {
    super.onCreate();
    mcontext= (Context) getApplicationContext();
}
 public static Context getContext(){
    return mcontext;
   }
}

的AndroidManifest.xml：

<application
    android:allowBackup="true"
    android:name= "com.example.teerna.smartagriculturev5.Context"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">
    <activity
        android:name=".MainActivity"
        android:label="@string/app_name">
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>
    </activity>
 </application>

</manifest>

Android：如何从另一个类返回类中的上下文（在getContext（）处获取错误）

0 个答案: