怎么从maiactivity.java中往布局中添加一个文本编辑框
EditText et_miyue=new EditText(null);
et_miyue.setHint("请输入密钥...");
et_miyue.setSingleLine(true);
et_miyue.setAlpha(getWallpaperDesiredMinimumWidth());
et_miyue.setX(BIND_ABOVE_CLIENT);
addContentView(et_miyue,null);