如何找到触摸事件时，手指刷过一个ImageView的 [英] How to find touch event when finger is swiped over an ImageView

问题描述

如何当手指刷过的图像发现触摸事件。

相对布局包含多个图像视图。它们被随机放置。当我刷卡我的手指在屏幕上我想捕捉在其上的用户已经超过了他的手指图像视图。

我能捕捉到相对布局触摸事件，请建议一些方式来捕捉图像视图
感动在相对布局的刷卡动作。

附加的图像布局更好地理解。

code：

 公共类MainActivity延伸活动{    ImageView的ImageView的;
    矩形imageViewArea;
    @覆盖
    保护无效的onCreate（捆绑savedInstanceState）{
        super.onCreate（savedInstanceState）;
        的setContentView（R.layout.activity_main）;
        ImageView的=（ImageView的）findViewById（R.id.imageView）;
        imageViewArea =新的矩形（）;
        //imageView.getGlobalVisibleRect(imageViewArea）;
        //不工作
        imageView.setOnTouchListener（新OnTouchListener（）{            @覆盖
            公共布尔onTouch（视图V，MotionEvent事件）{
                // TODO自动生成方法存根
                返回false;
            }
        }）;
    }    //加工
    @覆盖
    公共布尔onTouchEvent（MotionEvent事件）{
        // TODO自动生成方法存根
        开关（event.getActionMasked（））
        {
        案例MotionEvent.ACTION_DOWN：
            打破;
        案例MotionEvent.ACTION_MOVE：
            Log.i（日志，ACTION_MOVE）;            INT X =（int）的event.getX（）;
            INT Y =（int）的event.getY（）;            //不工作
            如果（imageViewArea.contains（X，Y））{
                Toast.makeText（getApplicationContext（），点击，Toast.LENGTH_LONG）.show（）;
            }            打破;
        案例MotionEvent.ACTION_UP：
            打破;
        默认：
            打破;
        }
        返回super.onTouchEvent（事件）;
    }
 

解决方案

此示例code可以帮助你...

 最后RelativeLayout的布局=（RelativeLayout的）findViewById（R.id.detailsView）;
    最后ImageView的ImageView的=（ImageView的）findViewById（R.id.imageView）;
    最后矩形imageViewArea =新的矩形（）;
    imageView.getGlobalVisibleRect（imageViewArea）;
    layout.setOnTouchListener（新View.OnTouchListener（）{        @覆盖
        公共布尔onTouch（视图V，MotionEvent事件）{
            INT X =（int）的event.getX（）;
            INT Y =（int）的event.getY（）;
            如果（imageViewArea.contains（X，Y））{
                //刷卡是掠过的ImageView ....
            }
            返回true;
        }
    }）;
 

编辑：

 私人ImageView的ImageView的;
私人矩形imageRect;@覆盖
保护无效的onCreate（捆绑savedInstanceState）{
    // TODO自动生成方法存根
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.activity_main）;
    ImageView的=（ImageView的）findViewById（R.id.imageView1）;
}
@覆盖
公共布尔onTouchEvent（MotionEvent事件）{
    super.onTouchEvent（事件）;
    如果（imageRect == NULL）{
        imageRect =新的矩形（）;
        imageView.getGlobalVisibleRect（imageRect）;
    }
    INT X =（int）的event.getX（）;
    INT Y =（int）的event.getY（）;
    如果（imageRect.contains（X，Y））{
        Log.i（TAG，摸掠过ImageView的）;
    }
    返回true;
}
 

How to find touch event when finger is swiped over an Image.

Relative layout contains multiple image view. they are randomly placed. When I swipe my finger over screen I want to capture image view over which user has crossed his finger.

I am able to capture relative layout touch event Please suggest some way to capture image view touched in the swipe action in relative layout.

attached image layout for better understanding.

CODE:

public class MainActivity extends Activity {

    ImageView imageView;
    Rect imageViewArea;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        imageView=(ImageView) findViewById(R.id.imageView);
        imageViewArea = new Rect();
        //imageView.getGlobalVisibleRect(imageViewArea);


        //not working
        imageView.setOnTouchListener(new OnTouchListener() {

            @Override
            public boolean onTouch(View v, MotionEvent event) {
                // TODO Auto-generated method stub
                return false;
            }
        });
    }

    //working
    @Override
    public boolean onTouchEvent(MotionEvent event) {
        // TODO Auto-generated method stub
        switch(event.getActionMasked())
        {
        case MotionEvent.ACTION_DOWN:
            break;
        case MotionEvent.ACTION_MOVE:
            Log.i("log", "ACTION_MOVE");

            int x = (int) event.getX();
            int y = (int) event.getY();

            //not working 
            if(imageViewArea.contains(x, y)) {
                Toast.makeText(getApplicationContext(), "clicked", Toast.LENGTH_LONG).show();
            }

            break;
        case MotionEvent.ACTION_UP:
            break;
        default:
            break;
        }
        return super.onTouchEvent(event);
    }

解决方案

this sample code may help you...

    final RelativeLayout layout  =(RelativeLayout) findViewById(R.id.detailsView);
    final ImageView imageView = (ImageView) findViewById(R.id.imageView);
    final Rect imageViewArea = new Rect();
    imageView.getGlobalVisibleRect(imageViewArea);
    layout.setOnTouchListener(new View.OnTouchListener() {

        @Override
        public boolean onTouch(View v, MotionEvent event) {
            int x = (int) event.getX();
            int y = (int) event.getY();
            if(imageViewArea.contains(x, y)) {
                // swipe is passing over ImageView....
            }
            return true;
        }
    });

EDIT:

private ImageView imageView;
private Rect imageRect;

@Override
protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    imageView = (ImageView) findViewById(R.id.imageView1);
}


@Override
public boolean onTouchEvent(MotionEvent event) {
    super.onTouchEvent(event);
    if (imageRect == null) {
        imageRect = new Rect();
        imageView.getGlobalVisibleRect(imageRect);
    }
    int x = (int) event.getX();
    int y = (int) event.getY();
    if (imageRect.contains(x, y)) {
        Log.i(TAG, "touch passing over imageView");
    }
    return true;
}

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