[移动开发]03.鸿蒙HarmonyOS卡片 状态栏透明和代码设置渐变色

1.状态栏透明和去掉标题栏

• 状态栏透明：
  WindowManager.getInstance().getTopWindow().get().addFlags(WindowManager.LayoutConfig.MARK_ALLOW_EXTEND_LAYOUT);
• 去掉状态栏:
  getWindow().addFlags(WindowManager.LayoutConfig.MARK_FULL_SCREEN);
• 去掉标题栏

 "abilities": [
	"metaData":{
          "customizeData":[
            {
              "name": "hwc-theme",
              "value": "androidhwext:style/Theme.Emui.Light.NoTitleBar",
              "extra": ""
            }
          ]
        }
]

更多状态栏和导航栏处理：玩转HarmonyOS 状态栏&标题栏&导航栏相关操作方法整理

2.代码设置渐变色shape

由于看到不能在shape直接设置渐变，所以找到一个公共方法去设置：

    /**
     * 渐变色背景
     */
    public static ShapeElement getButtonShape(AbilityContext context, float radius, int resStartId, int resEndId) {
        ShapeElement shapeElement = new ShapeElement();
        shapeElement.setCornerRadius(radius);
        shapeElement.setShape(ShapeElement.RECTANGLE);
        //color关键值
        RgbColor[] rgbColors = new RgbColor[]{
                RgbColor.fromArgbInt(context.getColor(resStartId)),
                RgbColor.fromArgbInt(context.getColor(resEndId))};
        shapeElement.setRgbColors(rgbColors);
        //线性变化：对应type="linear"
        shapeElement.setShaderType(ShapeElement.LINEAR_GRADIENT_SHADER_TYPE);
        //变化方向，从左到右：对应angle="0"
        shapeElement.setGradientOrientation(ShapeElement.Orientation.LEFT_TO_RIGHT);
        return shapeElement;
    }

    /**
     * 通过id获取View
     */
    public static <T extends Component> T findById(AbilitySlice context, int id) {
        return (T) context.findComponentById(id);
    }

使用：

Button btn_rectangle = (Button) findComponentById(ResourceTable.Id_bt_search_button);
btn_rectangle.setBackground(ViewUil.getButtonShape(this, 54, ResourceTable.Color_btn_start_search, ResourceTable.Color_btn_end_search));

发现没有color文件，创建一个color.json文件：


得到对应的color文件：

{
  "color": [
    {
      "name": "btn_start_search",
      "value": "#D6A2FF"
    },
    {
      "name": "btn_end_search",
      "value": "#AC69FD"
    },
    {
      "name": "color_868686",
      "value": "#868686"
    }
  ]
}