簡單的Java問題

Question

示例1 - 工作

public class MainScreen extends Activity implements OnClickListener { 

    public void onClick(View v) { 
     Button touchedButton = (Button) v; 

     Test (MainScreen.this, touchedButton.getId()); 
     } 

    public void Test (MainScreen mainscreen, int touchedButton) { 

    if (touchedButton == R.id.serviceButton) 
    startService(new Intent(mainscreen, SimpleService.class)); 

    if (touchedButton == R.id.cancelButton) 
    stopService(new Intent(mainscreen, SimpleService.class)); 
} 
} 

例2 - 不工作

public class MainScreen extends Activity implements OnClickListener { 

    public void onClick(View v) { 
     Button touchedButton = (Button) v; 

     Secondary.Test (MainScreen.this, touchedButton.getId()); 
      } 
} 


public class Secondary extends Activity { 


public void Test (MainScreen mainscreen, int touchedButton) { 

    if (touchedButton == R.id.serviceButton) 
    startService(new Intent(mainscreen,SimpleService.class)); 

    if (touchedButton == R.id.cancelButton) 
    stopService(new Intent(mainscreen,SimpleService.class)); 
     } 
} 

爲什麼例2不工作？

Answer 1

你試圖靜態調用非靜態方法在這條線：

Secondary.Test (MainScreen.this, touchedButton.getId()); 

你需要創建一個實例的Secondary和實例調用Test()或更改Secondary.Test()要像一個靜態方法這樣的：

public static void Test (MainScreen mainscreen, int touchedButton) {