任意地方显示对话框

AlertDialog.Builder builder = new AlertDialog.Builder(this);
   LayoutInflater inf = getLayoutInflater();
    View layout = inf.inflate(R.layout.main, null);
    builder.setView(layout);
    builder.setTitle("Add to Home screen");
AlertDialog dialog = builder.create();
    WindowManager.LayoutParams WMLP = dialog.getWindow().getAttributes();
    int dialogOriginalHeight = WMLP.height;
WMLP.height += 750;
Log.i("XnY", "x="+WMLP.x+", y="+WMLP.y);
WMLP.x = -10;   //x position
WMLP.y = -10;   //y position
Log.i("XnY", "x="+WMLP.x+", y="+WMLP.y);
dialog.getWindow().setAttributes(WMLP);
Log.i("POSITION", "POS::HEIGHT:"+WMLP.height);
dialog.show();