Question

我目前正在发展这种观点。

我的目标API版本将是API5。

左侧A，B，C，D指参考图像（这些不可点击）下方显示图像是＆＃34;可拖动＆＃34;他们被洗牌了。现在，用户必须拖动底部图像并将其放入相应的＆＃34; Droppable Area＆＃34;在屏幕的右侧。 Demo Image

正在使用，这种布局：

.xml格式：

<LinearLayout id="@+id/container"
orientation="vertical">

 <LinearLayout android:orientation="horizontal"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher">
    <ImageView android:src="#FFFFFF"
               android"id="@+id/img">
 </LinearLayout>


 <LinearLayout android:orientation="horizontal"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher">
    <ImageView android:src="#FFFFFF"
               android"id="@+id/img1">
 </LinearLayout>


 <LinearLayout android:orientation="horizontal"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher">
    <ImageView android:src="#FFFFFF"
               android"id="@+id/img2">
 </LinearLayout>



 <LinearLayout android:orientation="horizontal"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher">
    <ImageView android:src="#FFFFFF"
               android"id="@+id/img3">
 </LinearLayout>





 <LinearLayout android:orientation="horizontal"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher"
               android:id="@+id/imgDrop"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher"
               android:id="@+id/imgDrop1"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher"
               android:id="@+id/imgDrop2"
               android:weight="1">
    <ImageView android:src="@drawable/ic_launcher"
               android:id="@+id/imgDrop3"
               android:weight="1">

 </LinearLayout>

对于MainActivity，我尝试使用以下代码来拖动＆amp;使用以下代码从开发人员网站和StackOverFlow中删除单个图像，它正在运行：

MainActivity.java：

public class MainActivity extends Activity implements OnTouchListener {
private View selected_item = null;
private int offset_x = 0;
private int offset_y = 0;
Boolean touchFlag=false;
boolean dropFlag=false;
LayoutParams imageParams;
ImageView imageDrop,image1,image2;
int crashX,crashY;
Drawable dropDrawable,selectDrawable;
Rect dropRect,selectRect;
int topy,leftX,rightX,bottomY;

int dropArray[];    

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    ViewGroup container = (ViewGroup) findViewById(R.id.container);
    imageDrop=(ImageView) findViewById(R.id.ImgDrop);       
    image1=(ImageView) findViewById(R.id.img);      
    image2=(ImageView) findViewById(R.id.img2);
    container.setBackgroundColor(Color.GREEN);

    container.setOnTouchListener(new View.OnTouchListener() 
    {
        @SuppressWarnings("deprecation")
        public boolean onTouch(View v, MotionEvent event) 
        {
            if(touchFlag==true)
            {
                System.err.println("Display If  Part ::->"+touchFlag);
                switch (event.getActionMasked()) 
                {
                case MotionEvent.ACTION_DOWN :

                     topy=imageDrop.getTop();
                     leftX=imageDrop.getLeft();
                     rightX=imageDrop.getRight();   
                     bottomY=imageDrop.getBottom();
                    System.err.println("Display Top-->"+topy);      
                    System.err.println("Display Left-->"+leftX);
                    System.err.println("Display Right-->"+rightX);
                    System.err.println("Display Bottom-->"+bottomY);                


                    //opRect.
                    break;
                case MotionEvent.ACTION_MOVE:
                    crashX=(int) event.getX();
                    crashY=(int) event.getY();
                    System.err.println("Display Here X Value-->"+crashX);
                    System.err.println("Display Here Y Value-->"+crashY);

                    int x = (int) (event.getX() - offset_x);
                    int y = (int) (event.getY() - offset_y);                                          
                    int w = getWindowManager().getDefaultDisplay().getWidth() - 50;
                    int h = getWindowManager().getDefaultDisplay().getHeight() - 10;
                    if (x > w)
                        x = w;
                    if (y > h)
                        y = h;                      
                    RelativeLayout.LayoutParams lp = new RelativeLayout.LayoutParams(new ViewGroup.MarginLayoutParams(  
                            RelativeLayout.LayoutParams.WRAP_CONTENT,   RelativeLayout.LayoutParams.WRAP_CONTENT));

                    lp.setMargins(x, y, 0, 0);                  

                    //Drop Image Here                       
                    if(crashX > leftX && crashX < rightX && crashY > topy && crashY < bottomY )                     
                    {                           
                        Drawable temp=selected_item.getBackground();                            
                        imageDrop.setBackgroundDrawable(temp);
                        imageDrop.bringToFront();                           
                        dropFlag=true;
                        selected_item.setVisibility(View.INVISIBLE);
                    }
                    //Drop Image Here                       
                    selected_item.setLayoutParams(lp);
                    break;  
                case MotionEvent.ACTION_UP:
                    //                      
                    touchFlag=false;
                    if(dropFlag==true)
                    {
                        dropFlag=false;
                    }
                    else
                    {
                        selected_item.setLayoutParams(imageParams);
                    }                       
                    break;
                default:
                    break;
                }
            }else
            {
                System.err.println("Display Else Part ::->"+touchFlag);
            }               
            return true;
        }
    });

    image1.setOnTouchListener(this);
    image2.setOnTouchListener(this);
}

public boolean onTouch(View v, MotionEvent event) 
{   
    switch (event.getActionMasked()) 
    {
    case MotionEvent.ACTION_DOWN:
        touchFlag=true;
        offset_x = (int) event.getX();
        offset_y = (int) event.getY();
        selected_item = v;
        imageParams=v.getLayoutParams();
        break;
    case MotionEvent.ACTION_UP:
        selected_item=null;
        touchFlag=false;
        break;
    default:
        break;
    }       
    return false;

} }

我的问题是如何实现我需要的逻辑方式，如上图所示。

任何建议或参考都非常值得注意。感谢。

Answer 1

检查这是否有用

创建一个实现OnTouchListener

的新类MultiTouchListener

import android.util.Log;
import android.view.MotionEvent;
import android.view.View;
import android.view.View.OnTouchListener;

public class MultiTouchListener implements OnTouchListener
{

private float mPrevX;
private float mPrevY;

public MainActivity mainActivity;
public MultiTouchListener(MainActivity mainActivity1) {
    mainActivity = mainActivity1;
}

@Override
public boolean onTouch(View view, MotionEvent event) {

    int action = event.getAction();
    switch (action ) {
        case MotionEvent.ACTION_DOWN: {

            mPrevX = event.getX();
            mPrevY = event.getY();
            break;
        }

        case MotionEvent.ACTION_MOVE:
        {
            // Find the index of the active pointer and fetch its position.
                float currX = event.getX();
                float currY = event.getY();


                    adjustTranslation(view, currX - mPrevX, currY - mPrevY);

            break;
        }

        case MotionEvent.ACTION_CANCEL:
            break;

        case MotionEvent.ACTION_UP:
            break;


    }

    return true;
}



private static void adjustTranslation(View view, float deltaX, float deltaY) 
{
    float[] deltaVector = { deltaX, deltaY };
    view.getMatrix().mapVectors(deltaVector);
    view.setTranslationX(view.getTranslationX() + deltaVector[0]);
    view.setTranslationY(view.getTranslationY() + deltaVector[1]);
}

}

现在在MainActivity中，假设imgDrop是可拖动的图像，然后将touchListener应用于此图像：

MultiTouchListener touchListener=new MultiTouchListener(this);
imgDrop.setOnTouchListener(touchListener);

这会将touchListener应用于你的imageView。现在实现你的逻辑。首先在MainActivity中为每个imageView分配一个标签，你必须放下你可拖动的图像（白色imageViews）。我假设那些为base1，base2等等。

//一些全局声明

    ImageView base;
    float v_origX,v_origY; // Used for original X and Y of ImageViews

//在MainActivity的OnCreate（）中

base1.setTag(0);
base2.setTag(1);
base3.setTag(2);
base4.setTag(3);

//检查基本imageView的标签的功能

public void checkTag(Object tag)
{

    if(tag.equals(0))
    base=(ImageView)findViewById(R.id.base1);
    else if(tag.equals(1))
    base=(ImageView)findViewById(R.id.base2);
    else if(tag.equals(2))
    base=(ImageView)findViewById(R.id.base3);
            else if(tag.equals(3))
    base=(ImageView)findViewById(R.id.base4);
    tag=this.tag;
    //You can get the X and Y and the corresponding width and height for the imageViews to apply the logic for intersection
    /* b_x=base.getX();
    b_y=base.getY();
    b_x_width=base.getX()+base.getWidth();
    b_y_height=base.getY()+base.getHeight(); */
}

///////////检查图像的交点（拖放）

    public void checkIntersection(View imgView)
{
    ImageView view=(ImageView)findViewById(imgView.getId());
 // You can get the X and Y coordinates and width and height of the Dragged ImageView as
     /* v_x=view.getX();
    v_y=view.getY();
    v_x_width=view.getX()+view.getWidth();
    v_y_height=view.getY()+view.getHeight(); */

    if( Comparison of X and Y coordinates of dragged ImageViews and base ImageView)
             {
                // Stuff if Intersection is correct 
              }
    else
    {
// Move the imageView back to their original position if matching sequence is wrong
        view.setX(v_origX);
        view.setY(v_origY);

    }
}

//在MultiTouchListener中更新几行 //用

更新ACTION_DOWN

    case MotionEvent.ACTION_DOWN: {

//Get the original x and y coordinates 

            mainActivity.v_origX=view.getX();
            mainActivity.v_origY=view.getY();

}

并在ACTION_UP中添加

case MotionEvent.ACTION_UP:
            mainActivity.checkTag(view.getTag());
            mainActivity.checkIntersection(view);

将多个图像拖放到相应位置

1 个答案: