Android 开发实例：图片拖动的实现(java)

核心提示：package org.anjoy.activity;import *.*;// 图片拖动示例public class MoveImageViewSample extends Activity {private int screenWidth, screenHeight;// ImageView 图片显示区域priva

package org.anjoy.activity;

import *.*;

// 图片拖动示例

public class MoveImageViewSample extends Activity {

private int screenWidth, screenHeight;

// ImageView 图片显示区域

private ImageView iv_1;

// TextView 显示屏幕，图片位置等信息

private TextView tv_1, tv_2, tv_3;

// 图片的位置参数对象，

// 通过Drawable对象的getLayoutParams()方法取得，可得到图片的位置信息

// 通过设置LayoutParams方法的x,y坐标，并传给图片，可以改变图片的位置，如：

// setLayoutParams(paramsIv_1)

private AbsoluteLayout.LayoutParams paramsIv_1;

// 记录图片的长宽，与左上角一点的坐标

private int picWidth, picHeight, picX, picY;

// 在onTouchEvent方法中设置，标记是否击中图片

private boolean clickPic;

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

// 全屏显示

requestWindowFeature(Window.FEATURE_NO_TITLE);

getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,

WindowManager.LayoutParams.FLAG_FULLSCREEN);

// 加载layout

setContentView(R.layout.moveimageviewsample);

// 得到屏幕分辨率，并在text view 1 上显示

tv_1 = (TextView) this.findViewById(R.id.TextInfo_1);

screenWidth = AnjoyUtil.getScreenWidth(this);

screenHeight = AnjoyUtil.getScreenHight(this);

tv_1.setText("Anjoy Screen information" + screenHeight + ":"

+ screenWidth);

// 加载图片，在image view 1上显示

Drawable pic = getResources().getDrawable(R.drawable.icon);

iv_1 = (ImageView) this.findViewById(R.id.ImageView01);

iv_1.setImageDrawable(pic);

// iv_1.setBackgroundColor(Color.LTGRAY);

iv_1.setScaleType(ScaleType.FIT_CENTER);