TableShowView.java

package com.duguang.baseanimation.ui.imitate.widget;

import com.duguang.baseanimation.R;

import android.content.Context;
import android.graphics.Color;
import android.view.LayoutInflater;
import android.view.MotionEvent;
import android.view.View;
import android.view.WindowManager;
import android.view.View.OnTouchListener;
import android.widget.Toast;

public class TableShowView extends View {
	// 如果是想显示歌词则继承TextView并复写ondraw方法。
		// 开启一个线程不断的调用ondraw方法去更改你所写的继承自TextView的内容
		// 这里随便写了个集成自view的= =这个不是重点

		Context						c;
		WindowManager				mWM;		// WindowManager
		WindowManager.LayoutParams	mWMParams;	// WindowManager参数
		View						win;
		int tag = 0;
		int oldOffsetX;
		int oldOffsetY;

		public TableShowView(Context context) {
			// TODO Auto-generated constructor stub
			super(context);
			c = context;
		}

		public void fun() {
			// 设置载入view WindowManager参数
			mWM = (WindowManager) c.getSystemService(Context.WINDOW_SERVICE);
			win = LayoutInflater.from(c).inflate(R.layout.activity_imitate_widget_ctrl_window, null);
			win.setBackgroundColor(Color.TRANSPARENT);
			// 这里是随便载入的一个布局文件
			
			win.setOnTouchListener(new OnTouchListener() {
				// 触屏监听
				float	lastX, lastY;

				public boolean onTouch(View v, MotionEvent event) {
					final int action = event.getAction();

					float x = event.getX();
					float y = event.getY();
					
					if(tag == 0){
					   oldOffsetX= mWMParams.x; // 偏移量
					   oldOffsetY = mWMParams.y; // 偏移量
					}
					
				    
					if (action == MotionEvent.ACTION_DOWN) {
						lastX = x;
						lastY = y;

					}
					else if (action == MotionEvent.ACTION_MOVE) {
						mWMParams.x += (int) (x - lastX); // 偏移量
						mWMParams.y += (int) (y - lastY); // 偏移量
						
						tag = 1;
						mWM.updateViewLayout(win, mWMParams);
					}

					else if (action ==  MotionEvent.ACTION_UP){
						int newOffsetX = mWMParams.x;
						int newOffsetY = mWMParams.y;					
						if(oldOffsetX == newOffsetX && oldOffsetY == newOffsetY){
							Toast.makeText(c, "你点到我了……疼！！！！", 1).show();
						}else {
							tag = 0;
						}
					}
					return true;
				}
			});
			


			WindowManager wm = mWM;
			WindowManager.LayoutParams wmParams = new WindowManager.LayoutParams();
			mWMParams = wmParams;
			wmParams.type = 2002; // type是关键，这里的2002表示系统级窗口，你也可以试试2003。
			wmParams.flags = 40;// 这句设置桌面可控

			wmParams.width = 50;
			wmParams.height = 50;
			wmParams.format = -3; // 透明

			wm.addView(win, wmParams);// 这句是重点 给WindowManager中丢入刚才设置的值
										// 只有addview后才能显示到页面上去。
			// 注册到WindowManager win是要刚才随便载入的layout，wmParams是刚才设置的WindowManager参数集
			// 效果是将win注册到WindowManager中并且它的参数是wmParams中设置饿

			
			

		}

}