手指在屏幕的同一個位置時做事件嗎？ Libgdx

Question

如何一次性輪詢單個手指的事件？更具體地說，我需要了解一個人何時觸摸屏幕，但他們需要始終保持在同一個位置，這需要多點觸控才能實現，因此如果他們將手指放在同一個位置可以說500毫秒，那麼我可以採取行動。我所嘗試過的所有代碼都不起作用，而且我大部分都很煩惱。

Answer 1

package com.multitouch; 

import android.app.Activity; 
import android.os.Bundle; 
import android.os.Handler; 
import android.util.Log; 
import android.view.MotionEvent; 
import android.view.View; 
import android.view.View.OnTouchListener; 
import android.widget.LinearLayout; 
import android.widget.TextView; 

public class MultiTouch extends Activity { 
    protected LinearLayout sq1; 
    protected LinearLayout sq2; 
    protected LinearLayout sq3; 
    protected LinearLayout sq4; 

    protected String sqText = new String(); 
    protected String sq1Text = new String(); 
    protected String sq2Text = new String(); 
    protected String sq3Text = new String(); 

    private Handler handler = new Handler(); 

    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     setViews(); 
     handler.postDelayed(mUpdateUITimerTask, 5000); 
    } 

    private final Runnable mUpdateUITimerTask = new Runnable() { 
     public void run() { 
      // do whatever you want to change here, like: 
      updateTextField(); 
     } 
    }; 

    private void updateTextField() { 
     TextView view1 = (TextView) this.findViewById(R.id.logView); 
     TextView view2 = (TextView) this.findViewById(R.id.logView1); 
     TextView view3 = (TextView) this.findViewById(R.id.logView2); 
     TextView view4 = (TextView) this.findViewById(R.id.logView3); 


     //view1.append(sqText + "\n"); 
     view1.setText(sqText); 
     view2.setText(sq1Text); 
     view3.setText(sq2Text); 
     view4.setText(sq3Text); 

     handler.post(mUpdateUITimerTask); 
    } 

    private void setViews() { 
     sq1 = (LinearLayout) this.findViewById(R.id.square1); 
     sq2 = (LinearLayout) this.findViewById(R.id.square2); 
     sq3 = (LinearLayout) this.findViewById(R.id.square3); 
     sq4 = (LinearLayout) this.findViewById(R.id.square4); 

     sq1.setOnTouchListener(new TouchListener()); 
     sq2.setOnTouchListener(new TouchListener()); 
     sq3.setOnTouchListener(new TouchListener()); 
     sq4.setOnTouchListener(new TouchListener());   
    } 

    private class TouchListener implements OnTouchListener { 

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

      if(event.getPointerCount()>2) { 
       sq1Text = "GOT THREE POINTERS!!"; 
       sq2Text = "GOT THREE POINTERS!!"; 
       sq3Text = "GOT THREE POINTERS!!"; 
       sqText = "GOT THREE POINTERS!!"; 
      } 

      if(event.getAction() == MotionEvent.ACTION_DOWN){ 
       switch(v.getId()) { 
        case R.id.square1: 
         sqText = "Square 1 Pressed::Pointer count = " + String.valueOf(event.getPointerCount()); 
        break; 
        case R.id.square2: 
         sq1Text = "Square 2 Pressed::Pointer count = " + String.valueOf(event.getPointerCount()); 
        break; 
        case R.id.square3: 
         sq2Text = "Square 3 Pressed::Pointer count = " + String.valueOf(event.getPointerCount()); 
        break; 
        case R.id.square4: 
         sq3Text = "Square 4 Pressed::Pointer count = " + String.valueOf(event.getPointerCount()); 
        break; 
       } 
      } else if(event.getAction() == MotionEvent.ACTION_POINTER_DOWN || 
         event.getAction() == MotionEvent.ACTION_POINTER_UP) { 
       switch(v.getId()) { 
        case R.id.square1: 
         sqText = "Square 1 Pointer Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square2: 
         sq1Text = "Square 2 Pointer Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square3: 
         sq2Text = "Square 3 Pointer Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square4: 
         sq3Text = "Square 4 Pointer Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
       } 
      } else if(event.getAction() == MotionEvent.ACTION_POINTER_1_DOWN) { 
       switch(v.getId()) { 
        case R.id.square1: 
         sqText = "Square 1 Pointer1Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square2: 
         sq1Text = "Square 2 Pointer1Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square3: 
         sq2Text = "Square 3 Pointer1Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square4: 
         sq3Text = "Square 4 Pointer1Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
       } 
      } else if(event.getAction() == MotionEvent.ACTION_POINTER_2_DOWN) { 
       switch(v.getId()) { 
        case R.id.square1: 
         sqText = "Square 1 Pointer2Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square2: 
         sq1Text = "Square 2 Pointer2Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square3: 
         sq2Text = "Square 3 Pointer2Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square4: 
         sq3Text = "Square 4 Pointer2Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
       } 
      } else if(event.getAction() == MotionEvent.ACTION_POINTER_3_DOWN) { 
       switch(v.getId()) { 
        case R.id.square1: 
         sqText = "Square 1 Pointer3Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square2: 
         sq1Text = "Square 2 Pointer3Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square3: 
         sq2Text = "Square 3 Pointer3Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square4: 
         sq3Text = "Square 4 Pointer3Down::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
       } 
      } else if(event.getAction() == MotionEvent.ACTION_UP) { 
       switch(v.getId()) { 
        case R.id.square1: 
         sqText = "Square 1 UP::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square2: 
         sq1Text = "Square 2 UP::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square3: 
         sq2Text = "Square 3 UP::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square4: 
         sq3Text = "Square 4 UP::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
       } 
      } else if(event.getAction() == MotionEvent.ACTION_MOVE) { 
       switch(v.getId()) { 
        case R.id.square1: 
         sqText = "Square 1 MOVE::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square2: 
         sq1Text = "Square 2 MOVE::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square3: 
         sq2Text = "Square 3 MOVE::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
        case R.id.square4: 
         sq3Text = "Square 4 MOVE::Pointer count = " + String.valueOf(event.getPointerCount()) + "\n"; 
        break; 
       } 
      } 


      // TODO Auto-generated method stub 
      return true; 
     } 

    } 
} 

XML

<?xml version="1.0" encoding="utf-8"?> 
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical" 
    android:gravity="center_horizontal" 
    android:layout_width="fill_parent" 
    android:layout_height="fill_parent" 
    android:id="@+id/MainLay" > 

    <TableLayout xmlns:android="http://schemas.android.com/apk/res/android" 
     android:layout_width="fill_parent" 
     android:layout_height="fill_parent" 
     android:orientation="vertical" 
     android:gravity="center_horizontal" android:padding="10dip"> 


     <TableRow android:gravity="center_horizontal" android:padding="10dip"> 
      <LinearLayout android:background="#FFFF00" android:id="@+id/square1" android:padding="10px" android:layout_width="125px" android:layout_height="125px"/> 
      <LinearLayout android:background="#FF00FF" android:id="@+id/square2" android:padding="10px" android:layout_width="125px" android:layout_height="125px"/> 
     </TableRow> 

     <TableRow android:gravity="center_horizontal" android:padding="10dip"> 
      <LinearLayout android:background="#00FFFF" android:id="@+id/square3" android:padding="10px" android:layout_width="125px" android:layout_height="125px"/> 
      <LinearLayout android:background="#eeeeee" android:id="@+id/square4" android:padding="10px" android:layout_width="125px" android:layout_height="125px"/> 
     </TableRow>  


      <TextView android:id="@+id/logView" android:layout_width="wrap_content" android:layout_height="wrap_content"/> 
      <TextView android:id="@+id/logView1" android:layout_width="wrap_content" android:layout_height="wrap_content"/> 
      <TextView android:id="@+id/logView2" android:layout_width="wrap_content" android:layout_height="wrap_content"/> 
      <TextView android:id="@+id/logView3" android:layout_width="wrap_content" android:layout_height="wrap_content"/> 



    </TableLayout> 

</LinearLayout>