Android触屏测试实例代码

package com.test;import android.app.Activity;import android.os.Bundle;import android.util.DisplayMetrics;import android.util.Log;import android.view.MotionEvent;import android.view.View;import android.widget.AbsoluteLayout;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;public class TouchActivity extends Activity {  /*声明ImageView变量*/  private ImageView mImageView01;  /*声明相关变量作为存储图片宽高,位置使用*/  private int intWidth, intHeight, intDefaultX, intDefaultY;  private float mX, mY;   /*声明存储屏幕的分辨率变量 */  private int intScreenX, intScreenY;  public void onCreate(Bundle savedInstanceState)  {   super.onCreate(savedInstanceState);    setContentView(R.layout.main);      /* 取得屏幕对象 */   DisplayMetrics dm = new DisplayMetrics();    getWindowManager().getDefaultDisplay().getMetrics(dm);      /* 取得屏幕解析像素 */   intScreenX = dm.widthPixels;   intScreenY = dm.heightPixels;      /* 设置图片的宽高 */   intWidth = 100;   intHeight = 100;   /*通过findViewById构造器创建ImageView对象*/    mImageView01 =(ImageView) findViewById(R.id.myImageView1);   /*将图片从Drawable赋值给ImageView来呈现*/   mImageView01.setImageResource(R.drawable.baby);      /* 初始化按钮位置居中 */   RestoreButton();      /* 当点击ImageView，还原初始位置 */   mImageView01.setOnClickListener(new Button.OnClickListener()   {    @Override    public void onClick(View v)    {     RestoreButton();    }   });  }    /*覆盖触控事件*/  public boolean onTouchEvent(MotionEvent event)   {   /*取得手指触控屏幕的位置*/   float x = event.getX();   float y = event.getY();      try   {    /*触控事件的处理*/    switch (event.getAction())     {     /*点击屏幕*/     case MotionEvent.ACTION_DOWN:      picMove(x, y);       break;     /*移动位置*/     case MotionEvent.ACTION_MOVE:      picMove(x, y);       break;     /*离开屏幕*/     case MotionEvent.ACTION_UP:      picMove(x, y);        break;    }   }catch(Exception e)    {     e.printStackTrace();    }   return true;  }  /*移动图片的方法*/  private void picMove(float x, float y)  {   /*默认微调图片与指针的相对位置*/   mX=x-(intWidth/2);   mY=y-(intHeight/2);      /*防图片超过屏幕的相关处理*/   /*防止屏幕向右超过屏幕*/   if((mX+intWidth)>intScreenX)   {    mX = intScreenX-intWidth;   }   /*防止屏幕向左超过屏幕*/   else if(mX<0)   {    mX = 0;   }   /*防止屏幕向下超过屏幕*/   else if ((mY+intHeight)>intScreenY)   {    mY=intScreenY-intHeight;   }   /*防止屏幕向上超过屏幕*/   else if (mY<0)   {    mY = 0;   }   /*通过log 来查看图片位置*/   Log.i("jay", Float.toString(mX)+","+Float.toString(mY));   /* 以setLayoutParams方法，重新安排Layout上的位置 */   mImageView01.setLayoutParams   (    new AbsoluteLayout.LayoutParams    (intWidth,intHeight,(int) mX,(int)mY)   );  }    /* 还原ImageView位置的事件处理 */  public void RestoreButton()  {   intDefaultX = ((intScreenX-intWidth)/2);   intDefaultY = ((intScreenY-intHeight)/2);   /*Toast还原位置坐标*/   mMakeTextToast   (    "("+    Integer.toString(intDefaultX)+    ","+    Integer.toString(intDefaultY)+")",true   );      /* 以setLayoutParams方法，重新安排Layout上的位置 */   mImageView01.setLayoutParams   (    new AbsoluteLayout.LayoutParams    (intWidth,intHeight,intDefaultX,intDefaultY)   );  }    /*自定义一发出信息的方法*/  public void mMakeTextToast(String str, boolean isLong)  {   if(isLong==true)   {    Toast.makeText(TouchActivity.this, str, Toast.LENGTH_LONG).show();   }   else   {    Toast.makeText(TouchActivity.this, str, Toast.LENGTH_SHORT).show();   }  }}