为什么我收到SETID（）未定义

Question

当我使用setId(D)，我收到此错误信息：

The method setId() is undefined for the type MainActivity 

如果我不能在这种情况下使用setId()，有没有其他的方法来设置一个ID为TextView动态？

MainActivity：

... 
public void onClick(View view) { 
    ... 
    if (D>=0) {screen();} 
    D=D+1; 
} 

public void screen() { 
    setId(D); 
    if (D==0) { 
    TextView D = (TextView) findViewById(R.id.D); 
    D.setText("the button was pressed: " +D+ "time"); 
    } 
} 
... 

// I dont want to write twenty conditions 
if (D==1) { 
    TextView D1 = (TextView) findViewById(R.id.1);  
    D1.setText("some text" +num); 
    }  
if (D==2) { 
    TextView D2 = (TextView) findViewById(R.id.2);  
    D2.setText("some text" +num) ; 
    } 
if (D==3) { 
    TextView D3 = (TextView) findViewById(R.id.3);  
    D3.setText("some text" +num) ; 
    } 
// and so on... 

activity_main.xml中：

<TextView   
    android:id="@+id/1" 
    android:layout_width="wrap_content" 
    android:layout_height="40dp" 
    android:layout_alignParentLeft="true" 
    android:layout_marginTop="20dp" /> 

<TextView   
    android:id="@+id/2" 
    android:layout_width="wrap_content" 
    android:layout_height="40dp" 
    android:layout_alignParentLeft="true" 
    android:layout_marginTop="40dp" /> 

<TextView 
    android:id="@+id/3" 
    android:layout_width="wrap_content" 
    android:layout_height="40dp" 
    android:layout_alignParentLeft="true" 
    android:layout_marginTop="60dp" /> 

... 

Answer 1

... 
public void onClick(View view) {   
...   
     // pass the clicked view 
     if (D>=0) {screen(view);}     
     D=D+1;    
} 

public void screen(View view) { 
    /// call setId on the view that was clicked  
    view.setId(D); 
    if (D==0) { // maybe you want !=0 here instead 
     // D already should exist as a number, notice the name change in next 2 line 
     TextView textview_D = (TextView) findViewById(R.id.D);  
     textview_D.setText("the button was pressed: " +D+ "time"); 
    } 
} 
... 

Answer 2

ID不意味着改变或将被用作变量。对于附加到视图的元数据，您可能需要查看view.tag http://developer.android.com/reference/android/view/View.html#getTag()

您还可以通过标记检索视图。 http://developer.android.com/reference/android/view/View.html#findViewWithTag(java.lang.Object)

请注意，还有其他方式来存储计数器。通常在你的活动中一个简单的领域就足够了。