Android 工作多点触控按钮

Question

您好，我想创建 2 个按钮，我想多点触控？？

我尝试过，但在互联网上没有例子..

所以如果你有一个你可以分享或者你能给我意见吗？ 我的代码是这样的，但不支持多点触控

 package multi.touch;

 import android.app.Activity;
 import android.os.Bundle;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.View.OnTouchListener;
 import android.widget.AbsoluteLayout.LayoutParams;
 import android.widget.Button;
 import android.widget.TextView;

 public class baslat extends Activity implements OnTouchListener  { 
 TextView yazi;
 TextView bir,iki;
 Button buton1,buton2;

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

 yazi=(TextView)findViewById(R.id.textView1);
 bir=(TextView)findViewById(R.id.textView2);
 iki=(TextView)findViewById(R.id.textView3);
 buton1=(Button)findViewById(R.id.button1);
 buton2=(Button)findViewById(R.id.button2);

 buton2.setOnTouchListener(this);

 buton1.setOnTouchListener(this);

 }
 @Override
 public boolean onTouchEvent(MotionEvent event) {
    yazi.setText(String.valueOf(event.getPointerCount()+"\n\n"));
            bir.setText(String.valueOf("Birinci "
 + (int)event.getX(0)+"\n\n"+(int)event.getY(0)));
        iki.setText(String.valueOf("Ikinci"+
 (int)event.getX(1)+"\n\n"+(int)event.getY(1)));
    //buton2.setLayoutParams(new
 LayoutParams(LayoutParams.WRAP_CONTENT,LayoutParams.WRAP_CONTENT,
 (int)event.getX(0),
 (int)event.getY(0)));      return
 super.onTouchEvent(event);
            } @Override public boolean onTouch(View v, MotionEvent event) {
    Button fds=(Button)v;


            return false; }


 }

Answer 1

老问题，但我一直在纠结这个问题，直到我终于遇到了设置

android:splitMotionEvents="true"

在包含按钮视图的布局视图上，它允许按下多个按钮，我发现在 sdk 演示下载中提供的 ApiDemos 中进行挖掘

Answer 2

在 Android UI 框架中，所有的触摸事件都属于触摸起源的 View。因此，如果您触摸 Button，所有触摸事件都会通过该 Button 处理，直到您抬起手指为止；这包括用于多点触控的其他触控指针。根据我的经验，在单独的视图对象（您的 2 个按钮）之间实现多点触控的唯一方法是在一个覆盖整个屏幕的视图中捕获所有触摸事件，并自己委托触摸事件。这有点工作，但可以做到。

一个示例可能是包含一个填充屏幕但没有可绘制源（或者它是完全透明的）的 ImageView。将它放在您的其他元素之上（可能使用 FrameLayout），并在 ImageView 的 onTouchEvent() 方法中，分析触摸坐标，并将触摸事件传递给正确的按钮。使用多个触摸指针会变得相当复杂，但据我所知，这是将触摸事件传递给单独的 View 对象的唯一方法。

Answer 3

我对这个主题有点厌烦，我创建了一个处理程序类，用于使用多点触控按钮进行引导。随意使用和/或更新它。

//CLASS TO HANDLE THE EVENT
    public class MultitouchButtonHandler {
            ArrayList<View> views_info = new ArrayList<View>();
            public MultitouchButtonHandlerResult onTouchEvent(View v, MotionEvent ev) {

            //GET EVENT INFO 
            final int action = ev.getAction();
            int action_masked = action & MotionEvent.ACTION_MASK;
            if(action_masked==MotionEvent.ACTION_MOVE){
                return null;
            }

                //GET ABSOLUTE SIZE AND CHECK IF THIS ANY VIEW ATTACHED TO THIS POSITION
                final int original_location[] = { 0, 0 };
                v.getLocationOnScreen(original_location);
                final int actionPointerIndex = ev.getActionIndex();
                float rawX = (int) ev.getX(actionPointerIndex) + original_location[0];
                float rawY = (int) ev.getY(actionPointerIndex) + original_location[1];
                View eventView = getViewByLocation((int)rawX, (int)rawY);
                if(eventView==null) return null;

                MultitouchButtonHandlerResult result = new MultitouchButtonHandlerResult();
                result.view  = eventView;


                //CHECK WHAT KIND OF EVENT HAPPENED 
                switch (action_masked) {
                case MotionEvent.ACTION_DOWN: {
                    result.event_type = MotionEvent.ACTION_DOWN;
                    return result;
                }

                case MotionEvent.ACTION_UP: {
                    result.event_type = MotionEvent.ACTION_UP;
                    return result;
                }

                case MotionEvent.ACTION_CANCEL: {
                    result.event_type = MotionEvent.ACTION_CANCEL;
                    return result;
                }

                case MotionEvent.ACTION_POINTER_UP: {
                    result.event_type = MotionEvent.ACTION_UP;
                    return result;
                }

                case MotionEvent.ACTION_POINTER_DOWN: {
                    result.event_type = MotionEvent.ACTION_DOWN;
                    return result;
                }

                default:

                break;

                }

                return null;
            }

            public void addMultiTouchView(View v){
                views_info.add(v);;
            }
            public void removeMultiTouchView(View v){
                views_info.remove(v);;
            }

            public View getViewByLocation(int x, int y){

                for(int key=0; key!= views_info.size(); key++){
                    View v = views_info.get(key);
                    //GET BUTTON ABSOLUTE POSITION ON SCREEN
                    int[] v_location = { 0, 0 };
                    v.getLocationOnScreen(v_location);

                    //FIND THE BOUNDS
                    Point min = new Point(v_location[0], v_location[1]);
                    Point max = new Point(min.x + v.getWidth(), min.y + v.getHeight());


                    if(x>=min.x && x<=max.x && y>=min.y && y<=max.y){
                        //Log.d("mylog", "***Found a view: " + v.getId());
                        return v;
                    }

                }

                //Log.d("mylog", "Searching: " + x +", " + y + " but not found!");

                return null;
            }

        }

//CLASS TO FULLFILL WITH RESULT
public class MultitouchButtonHandlerResult {
    public View view;
    public int event_type;
}

//In your view 
private OnTouchListener listener_touch_button = new OnTouchListener() {

@Override
public boolean onTouch(View v, MotionEvent event) {
      MultitouchButtonHandlerResult result=multitouch_handler.onTouchEvent(v, event);
     if(result==null) return true;

                switch(result.event_type){
                    case MotionEvent.ACTION_DOWN:
                        Log.d("mylog", "DOWN");
                break;
                    case MotionEvent.ACTION_UP:
                        Log.d("mylog", "UP");
                break;
                    case MotionEvent.ACTION_CANCEL:
                            Log.d("mylog", "CANCEL");
                break;

                }

               Log.d("mylog", "View ID: " + result.view.getId());

               return false;
      }

 };

Answer 4

你检查过这个链接吗 -

如何在 Android 2 中使用多点触控
http://www.zdnet.com/blog/burnette/how-to-use-multi-touch-in-android-2/1747

How to code for multitouch