拖动图像设备

Question

我想移动图像在Android上触摸事件，因为我的手指移动图像必须移动手指的坐标。请任何人都可以帮助我？

Answer 1

package com.hb.skew; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Paint.Style; 
import android.graphics.RectF; 
import android.graphics.drawable.GradientDrawable.Orientation; 
import android.os.Bundle; 
import android.view.Gravity; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.LinearLayout; 

public class SkewActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 


     LinearLayout li = new LinearLayout(this); 
     li.setGravity(Gravity.CENTER_HORIZONTAL); 
     li.setOrientation(LinearLayout.VERTICAL); 

     li.addView(new MyView(this),this.getWindowManager().getDefaultDisplay().getWidth(), 100); 
    // li.addView(new MyView(this),this.getWindowManager().getDefaultDisplay().getWidth(), 100); 

     setContentView(li); 
    } 
} 
class MyView extends View{ 

     Paint paint = new Paint(); 
     public MyView(Context context) { 
       super(context); 
       setBackgroundColor(Color.BLUE); 
       setFocusable(true); 
       setFocusableInTouchMode(true); 
       paint.setStyle(Style.FILL_AND_STROKE); 
       paint.setColor(Color.RED); 
       paint.setAntiAlias(true); 
     } 

     @Override 
     protected void onDraw(Canvas canvas) { 
       super.onDraw(canvas); 

         RectF rf= new RectF(); 
         rf.left=20; 
         rf.top=0; 
         rf.bottom=100; 
         rf.right=100; 

         canvas.skew(+0f, +0.3f); 
         canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.icon), null, rf ,paint); 
         //canvas.drawRect(20, 30, 100, 130, paint);  
         canvas.restore(); 
         rf.left+=50; 
         rf.top=30; 
         rf.bottom=130; 
         rf.right+=100; 
         canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.icon), null, rf ,paint); 

         canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.icon), x, y ,paint); 

     } 

     float x,y; 
     @Override 
     public boolean onTouchEvent(MotionEvent event) { 


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


       invalidate(); 
       return true; 
     } 

} 

---

package com.hb.skew; 

import android.app.Activity; 
import android.content.Context; 
import android.graphics.BitmapFactory; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.graphics.Paint.Style; 
import android.graphics.RectF; 
import android.graphics.drawable.GradientDrawable.Orientation; 
import android.os.Bundle; 
import android.view.Gravity; 
import android.view.MotionEvent; 
import android.view.View; 
import android.widget.LinearLayout; 

public class SkewActivity extends Activity { 
    /** Called when the activity is first created. */ 
    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 


     LinearLayout li = new LinearLayout(this); 
     li.setGravity(Gravity.CENTER_HORIZONTAL); 
     li.setOrientation(LinearLayout.VERTICAL); 

     li.addView(new MyView(this),this.getWindowManager().getDefaultDisplay().getWidth(), 100); 
    // li.addView(new MyView(this),this.getWindowManager().getDefaultDisplay().getWidth(), 100); 

     setContentView(li); 
    } 
} 
class MyView extends View{ 

    Paint paint = new Paint(); 
    public MyView(Context context) { 
     super(context); 
     setBackgroundColor(Color.BLUE); 
     setFocusable(true); 
     setFocusableInTouchMode(true); 
     paint.setStyle(Style.FILL_AND_STROKE); 
     paint.setColor(Color.RED); 
     paint.setAntiAlias(true); 
    } 

    @Override 
    protected void onDraw(Canvas canvas) { 
     super.onDraw(canvas); 

      RectF rf= new RectF(); 
      rf.left=20; 
      rf.top=0; 
      rf.bottom=100; 
      rf.right=100; 

      canvas.skew(+0f, +0.3f); 
      canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.icon), null, rf ,paint); 
      //canvas.drawRect(20, 30, 100, 130, paint); 
      canvas.restore(); 
      rf.left+=50; 
      rf.top=30; 
      rf.bottom=130; 
      rf.right+=100; 
      canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.icon), null, rf ,paint); 

      canvas.drawBitmap(BitmapFactory.decodeResource(getResources(), R.drawable.icon), x, y ,paint); 

    } 

    float x,y; 
    @Override 
    public boolean onTouchEvent(MotionEvent event) { 


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


     invalidate(); 
     return true; 
    } 

}