Android中如何自定义view

Hi,titan:

To the best of my knowledge, there are two ways to implement customized view.

The first is using "WindowManager.LayoutParams"
Ex as below,

WindowManager.LayoutParams lp;//allen add view begin        LayoutInflater inflate = (LayoutInflater)getSystemService(Context.LAYOUT_INFLATER_SERVICE);        floatview = (RelativeLayout) inflate.inflate(R.layout.mapfloatview, null);        mWindowManager = (WindowManager)getSystemService(Context.WINDOW_SERVICE);        lp = new WindowManager.LayoutParams(     320, 40,                -160,-180,                 WindowManager.LayoutParams.TYPE_APPLICATION,                 WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE                    | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,                //WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS,                PixelFormat.TRANSLUCENT);   //allen add view end mWindowManager.addView(floatview, lp);

And the second is to define your customized view's class, see below:

drawView dv;dv = new drawView(this);//try to canvas, not used nowpublic class drawView extends View{private Bitmap bmp;private int x, y;public drawView(Context context){super(context);setFocusable(true);bmp = BitmapFactory.decodeResource(getResources(), R.drawable.b1);x = 0;y = 0;}@Overridepublic void onDraw(Canvas canvas){super.onDraw(canvas);Paint paint = new Paint();/*switch(posState){case PosState.LEFT_TOP:{if(leftTopState == LEFT_TOP_STATE_ONE){Log.i(TAG,"leftTopState == LEFT_TOP_STATE_ONE");canvas.drawBitmap(bmp, 0, 0, paint);}else if(leftTopState == LEFT_TOP_STATE_TWO){Log.i(TAG,"leftTopState == LEFT_TOP_STATE_TWO");canvas.drawBitmap(bmp, 0, 189, paint);}break;}}*///Here you may draw anythingcanvas.drawBitmap(bmp, x, y, paint);}}//Add viewlayout.addView(dv);

BR,
Allen

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