2 myq 26 myq_26 于 2013.04.23 11:06 提问

在屏幕上移动图片的问题

用户想在屏幕上把图像从一个位置移动到另外一个位置,我设置了代码来移动图像,但是问题是如果我移动一个图像,邻近的图像也跟着一起移动。如何只移动一个图像?
Main.java

public class MainActivity extends Activity  {
   int windowwidth;
   int windowheight;    
   ImageView ima1,ima2;

   private android.widget.RelativeLayout.LayoutParams layoutParams ;
   // private android.widget.RelativeLayout.LayoutParams layoutParams ;
   //private android.widget.RelativeLayout.LayoutParams layoutParams ;           

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

         windowwidth = getWindowManager().getDefaultDisplay().getWidth();
         windowheight = getWindowManager().getDefaultDisplay().getHeight();

         System.out.println("width" +windowwidth);
         System.out.println("height" +windowheight);             

         ima1 = (ImageView)findViewById(R.id.imageview1);
         ima1.setOnTouchListener(new View.OnTouchListener() {  

public boolean onTouch(View v, MotionEvent event) {
       layoutParams = (RelativeLayout.LayoutParams) ima1.getLayoutParams();

         switch(event.getAction())                   
            {
              case MotionEvent.ACTION_DOWN:                          
                    break;     

              case MotionEvent.ACTION_MOVE:
                    int x_cord = (int) event.getRawX();
                    int y_cord = (int) event.getRawY();

              System.out.println("value of x" +x_cord);
              System.out.println("value of y" +y_cord);           

                    if (x_cord > windowwidth) {
                        x_cord = windowwidth;
                       }
                    if (y_cord > windowheight) {
                        y_cord = windowheight;
                       }
             layoutParams.leftMargin = x_cord-25;
             layoutParams.topMargin = y_cord-25;
             //   layoutParams.rightMargin = x_cord-25;
             //   layoutParams.bottomMargin = y_cord-25;
             ima1.setLayoutParams(layoutParams);
                     break;
               default: break;
              }  
               return true;
            }
         });

         ima2 = (ImageView)findViewById(R.id.imageview2);
         ima2.setOnTouchListener(new View.OnTouchListener() {         

     public boolean onTouch(View v, MotionEvent event) {
         layoutParams = (RelativeLayout.LayoutParams) ima2.getLayoutParams();
              switch(event.getActionMasked())
                 {
                   case MotionEvent.ACTION_DOWN:
                       break;
                   case MotionEvent.ACTION_MOVE:
                       int x_cord = (int) event.getRawX();
                       int y_cord = (int) event.getRawY();

                       System.out.println("value of x1" +x_cord);
                   System.out.println("value of y1" +y_cord);                            

                        if (x_cord > windowwidth) {
                            x_cord = windowwidth;
                        }
                        if (y_cord > windowheight) {
                            y_cord = windowheight;
                        }
                        layoutParams.leftMargin = x_cord - 25;
                        layoutParams.topMargin = y_cord - 75;
                        ima2.setLayoutParams(layoutParams);
                        break;
                    default: break;
                }
                return true;
            }
        });
       }
   }

main.xml

<?xml version="1.0" encoding="utf-8"?>
    <RelativeLayout 
        xmlns:android="http://schemas.android.com/apk/res/android"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent">
  <ImageView 
    android:layout_width="100dp" 
    android:layout_height="100dp"
    android:id="@+id/imageview1" 
    android:src="@drawable/image1"  />    
<ImageView
    android:layout_width="100sp" 
    android:layout_height="100sp" 
    android:id="@+id/imageview2"
    android:src="@drawable/image2"   />             
 </RelativeLayout>

1个回答

luhuajcdd
luhuajcdd   2013.04.23 15:51

不能用相对布局,用绝对布局应该是可以的

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