来电号码归属地提示框

模仿Toast实现提示框

Toast提示只要提示的时间够长，就可以浮动到其他任何界面之上，所以我们可以模仿Toast来实现来电号码归属地的提示框

WindowManager
The interface that apps use to talk to the window manager. Use Context.getSystemService(Context.WINDOW_SERVICE) to get one of these. Each window manager instance is bound to a particular Display.
1. void addView(View view,ViewGroup.LayoutParams params)
  将一个View视图显示到当前窗口，LayoutParams are used by views to tell their parents how they want to be laid out.
2. void removeView(View view); 将一个View视图从当前窗口中移除。

自定义窗体提示框(参考Toast源码)

WindowManager wm = (WindowManager) getSystemService(WINDOW_SERVICE); 
View view = View.inflate(getApplicationContext(), R.layout.toast_location,
				null); 
TextView tv = (TextView) view.findViewById(R.id.tv_toast_address);
tv.setText(address);
LayoutParams params = new LayoutParams();
params.height = WindowManager.LayoutParams.WRAP_CONTENT;
params.width = WindowManager.LayoutParams.WRAP_CONTENT;
params.gravity = Gravity.LEFT | Gravity.TOP;
params.x = sp.getInt("lastx", 0);
params.y = sp.getInt("lasty", 0);
//本来还有一个FLAG_NOTUCHALBE为了让下面能触摸把这个给去掉了
params.flags = WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE  
		| WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON;
params.format = PixelFormat.TRANSLUCENT;	//源码中这里是TYPE_TAOST但是这里为了下面要进行点击拖动事件，而Toast不能拖动，
所以这里改成了TYPE_PRIORITY_PHONE,这是一个系统类型的提示框，使用这个提示框必须要申请权限,android.permission.SYSTEM_ALERT_WINDOW
params.type = WindowManager.LayoutParams.TYPE_PRIORITY_PHONE; 
wm.addView(view, params);

WindowManager添加的显示框的简单拖动
该这个View注册一个onTouchListener

public void showLocation(String address) {
    view = View.inflate(getApplicationContext(), R.layout.toast_location,
            null);
    // 得到sp
    int which = sp.getInt("which", 0);
    view.setBackgroundResource(bgs[which]);
    view.setOnTouchListener(new OnTouchListener() {
        int startX ,startY;

        public boolean onTouch(View v, MotionEvent event) {
            switch (event.getAction()) {
            
            case MotionEvent.ACTION_DOWN:
                Log.i(TAG,"摸到");
                startX = (int) event.getRawX();
                startY  = (int) event.getRawY();
                break;
            case MotionEvent.ACTION_MOVE:
                Log.i(TAG,"移动");
                int newX = (int) event.getRawX();
                int newY  = (int) event.getRawY();
                int dx = newX - startX;
                int dy = newY - startY;
                params.x+=dx;
                params.y+=dy;	//这里在WindowManager中不能够使用layout方法了，无效，只能使用layoutparams来更新位置，这里的params就是上面的那个params
                wm.updateViewLayout(view, params);
                //重新初始化 手指的位置
                startX = (int) event.getRawX();
                startY  = (int) event.getRawY();
                break;
            }
            return true;
        }
    });
}

普通ImageView随手指拖动改变位置

iv_drag_view.setOnTouchListener(new OnTouchListener() {
	//记录住最初手指按下时的位置
	int startX , startY; 
	//onTouch方法的返回值如果是true监听器会把这个事件给消费掉, false则监听器不会消费掉这个事件
	public boolean onTouch(View v, MotionEvent event) {
		switch (event.getAction()) {  
			case MotionEvent.ACTION_DOWN:
				Log.i(TAG,"摸到这个控件了");
				startX = (int) event.getRawX();//记录手指第一次点击到屏幕时候距离x和y轴的距离
				startY = (int) event.getRawY();
			break;
			case MotionEvent.ACTION_MOVE:// 手指在屏幕上移动的事件
				Log.i(TAG,"移动");
				int newX = (int) event.getRawX(); //在移动的过程中不断的获取到手指当前移动到的位置
				int newY = (int) event.getRawY();
				int dx = newX - startX;           //计算出手指移动了多少
				int dy = newY - startY;
				int l = iv_drag_view.getLeft(); //获取图片上下左右的长度
				int r = iv_drag_view.getRight();
				int b = iv_drag_view.getBottom();
				int t = iv_drag_view.getTop();
						
				int newl = l+dx; //计算图片应该移动的距离
				int newr = r+dx;
				int newt = t+dy;//imageview 在窗体中新的位置
				int newb = b+dy;
						
				//判断如果图片准备移动到的位置超出了屏幕就不让它移动,这里减去30是减去窗体上面的状态栏的高度
				if(newl<0||newt < 0 ||newb>display.getHeight()-30||newr>display.getWidth()){
					break;
				}            
				//将图片移动到新的位置。直接调用ImageView的layout方法
				iv_drag_view.layout(newl,  newt, newr, newb); 
				//一旦图片移动到新的位置就重新计算手指当前的位置，这样循环下去就能实现随着手指的拖动
				startX = (int) event.getRawX();
				startY = (int) event.getRawY();
			break;
			case MotionEvent.ACTION_UP: // 手指在离开屏幕的一瞬间对应的事件.
			Log.i(TAG,"放手");
			int lasty = iv_drag_view.getTop();//得到最后在离屏幕上方的距离
			int lastx = iv_drag_view.getLeft();//得到最后离屏幕左边的距离
			Editor editor = sp.edit();
			editor.putInt("lastx", lastx);
			editor.putInt("lasty", lasty);
			editor.commit();
			break;
		}
			return true; //这地方一定要返回true告诉系统这个事件做完了
	}
});

注意：在onCreate方法中使用layout方法是没有效果的，因为在进入一个Activity中系统首先会执行一个计算的操作，计算各个控件的布局，然后调用setContentView方法显示出来这个控件，第二步才会执行这个layout方法，但是在onCreate方法中设置了layout，在执行layout这段代码的时候，窗体有可能还没有计算完控件的布局，所以先执行了这个layout，然后又执行了计算控件布局来显示，这样layout就没效了，这里要怎么弄呢只能是通过设置这个控件的layout布局，这样在计算位置的时候就能计算了，这样设置布局能让它在计算的时候就计算了。如下，在onCreate方法中去这样设置。

protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    sp = getSharedPreferences("config", MODE_PRIVATE);
    // Have the system blur any windows behind this one.
    getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND,
            WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
    wm = (WindowManager) getSystemService(WINDOW_SERVICE);//窗体管理者
    display = wm.getDefaultDisplay();
    
    setContentView(R.layout.activity_drag_view);
    tv_drag_view = (TextView) findViewById(R.id.tv_drag_view);
    iv_drag_view = (ImageView) findViewById(R.id.iv_drag_view);
    
    int lastx = sp.getInt("lastx", 0);
    int lasty = sp.getInt("lasty", 0);
    
    RelativeLayout.LayoutParams params = (LayoutParams) iv_drag_view.getLayoutParams();
    params.leftMargin = lastx;
    params.topMargin = lasty;
    iv_drag_view.setLayoutParams(params); 
}

注意：在WindowManager中要想更新控件的距离就不能用layout方法了，只能用mWindowManager.updateViewLayout(view, params);

实现双击事件

双击的定义 Android中没有提供双击的点击事件，双击就是单位时间内的两次点击
触摸和点击事件的区别点击事件: 一组动作的集合点击 - 停留 - 离开. 触摸事件: 手指按下屏幕手指在屏幕上移动手指离开屏幕的一瞬间

public class DragViewActivity extends Activity {
	protected static final String TAG = "DragViewActivity";
	private ImageView iv_drag_view;
	private TextView tv_drag_view;
	private SharedPreferences sp;

	private WindowManager wm;
	private Display  display; //窗体的显示的分辨率

	private long firstClickTime;//第一次点击时候的事件

	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		sp = getSharedPreferences("config", MODE_PRIVATE);
		// Have the system blur any windows behind this one.
		getWindow().setFlags(WindowManager.LayoutParams.FLAG_BLUR_BEHIND,
				WindowManager.LayoutParams.FLAG_BLUR_BEHIND);
		wm = (WindowManager) getSystemService(WINDOW_SERVICE);//窗体管理者
		display = wm.getDefaultDisplay();

		setContentView(R.layout.activity_drag_view);
		tv_drag_view = (TextView) findViewById(R.id.tv_drag_view);
		iv_drag_view = (ImageView) findViewById(R.id.iv_drag_view);

		int lastx = sp.getInt("lastx", 0);
		int lasty = sp.getInt("lasty", 0);

		RelativeLayout.LayoutParams params = (LayoutParams) iv_drag_view.getLayoutParams();
		params.leftMargin = lastx;
		params.topMargin = lasty;
		iv_drag_view.setLayoutParams(params);

		iv_drag_view.setOnClickListener(new OnClickListener() {

			public void onClick(View v) {
				Log.i(TAG,"被点击了.");
				if(firstClickTime>0){//说明这是第二次点击.
					long secondTime = System.currentTimeMillis();
					long dtime = secondTime - firstClickTime;
					if(dtime<500){
						//双击事件.
						Log.i(TAG,"双击居中");
						int iv_width = iv_drag_view.getRight() - iv_drag_view.getLeft();
						iv_drag_view.layout(display.getWidth()/2-iv_width/2, iv_drag_view.getTop(), display.getWidth()/2+iv_width/2, iv_drag_view.getBottom());
						int lasty = iv_drag_view.getTop();//得到最后在离屏幕上方的距离
						int lastx = iv_drag_view.getLeft();//得到最后离屏幕左边的距离
						Editor editor = sp.edit();
						editor.putInt("lastx", lastx);
						editor.putInt("lasty", lasty);
						editor.commit();
					}
					firstClickTime = 0;//将第一次点击的时间还原成0。
					return;
				} else {
				//第一次点击
					firstClickTime = System.currentTimeMillis();//  记录第一次点击的时间
						//新开一个线程，在这个子线程中如果是500毫秒内没有再点击就将第一次点击的时间设置为0
					new Thread(){
						public void run() {
							try {
								Thread.sleep(500);
								firstClickTime = 0;
							} catch (InterruptedException e) {
								e.printStackTrace();
							}
						};
					}.start();
				}				
			}
		});
	}
}

触摸和双击同时发生时候的返回值

//onTouch方法的返回值，True if the listener has consumed the event, false otherwise,true 监听器会把这个事件给消费掉, false 不会消费掉这个事件
iv_drag_view.setOnTouchListener(new OnTouchListener() {

	int startX , startY;
	public boolean onTouch(View v, MotionEvent event) {
		switch (event.getAction()) {
		case MotionEvent.ACTION_DOWN:// 手指触摸到屏幕的事件
			Log.i(TAG,"摸到这个控件了");
			startX = (int) event.getRawX();
			startY = (int) event.getRawY();
			break;
		case MotionEvent.ACTION_MOVE:// 手指在屏幕上移动的事件
			Log.i(TAG,"移动");
			int newX = (int) event.getRawX();
			int newY = (int) event.getRawY();
			int dx = newX - startX;
			int dy = newY - startY;
			int l = iv_drag_view.getLeft();
			int r = iv_drag_view.getRight();
			int b = iv_drag_view.getBottom();
			int t = iv_drag_view.getTop();

			int newl = l+dx;
			int newr = r+dx;
			int newt = t+dy;//imageview 在窗体中新的位置
			int newb = b+dy;

			if(newl<0||newt < 0 ||newb>display.getHeight()-30||newr>display.getWidth()){
				break;
			}

			int tv_height = tv_drag_view.getBottom() - tv_drag_view.getTop();

			if(newt>display.getHeight()/2){//imageview在窗体的下方
				//textview在窗体的上方
				tv_drag_view.layout(tv_drag_view.getLeft(), 0, tv_drag_view.getRight(), tv_height);
			}else{
				tv_drag_view.layout(tv_drag_view.getLeft(), display.getHeight()-tv_height-30, tv_drag_view.getRight(), display.getHeight()-30);
				//textview在窗体的下方
			}

			iv_drag_view.layout(newl,  newt, newr, newb);

			//更新手指开始的位置.
			startX = (int) event.getRawX();
			startY = (int) event.getRawY();
			break;
		case MotionEvent.ACTION_UP: // 手指在离开屏幕的一瞬间对应的事件.
			Log.i(TAG,"放手");
			int lasty = iv_drag_view.getTop();//得到最后在离屏幕上方的距离
			int lastx = iv_drag_view.getLeft();//得到最后离屏幕左边的距离
			Editor editor = sp.edit();
			editor.putInt("lastx", lastx);
			editor.putInt("lasty", lasty);
			editor.commit();
			break;
		}
		// 这里对于触摸事件应该是返回true为什么这里返回false呢，因为这里这一个控件同时实现了点击和触摸这两个事件，如果返回true，
		// 那么就不可能发生点击事件了，所以对于同时实现点击和触摸的控件返回值要为false
		return false;
	}
});

邮箱：charon.chui@gmail.com
Good Luck!

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