LVGL 8.2 pie chart

Create a pie chart

static void lv_example_meter_4(void)
{
    lv_obj_t* meter = lv_meter_create(lv_scr_act());
    /*Remove the background and the circle from the middle*/
    lv_obj_remove_style(meter, NULL, LV_PART_MAIN);  // 移除LV_PART_MAIN特性
    lv_obj_remove_style(meter, NULL, LV_PART_INDICATOR);   // 移除LV_PART_INDICATOR特性
    lv_obj_set_size(meter, 200, 200);  // 设置大小
    lv_obj_center(meter);  // 居中显示
    /*Add a scale first with no ticks.*/
    lv_meter_scale_t* scale = lv_meter_add_scale(meter);  
    lv_meter_set_scale_ticks(meter, scale, 0, 0, 0, lv_color_black());  //无刻度线
    lv_meter_set_scale_range(meter, scale, 0, 100, 360, 0); // 0~100%，角度范围360，3点钟偏移角度0
    /*Add a three arc indicator*/
    lv_coord_t indic_w = 100; 
    lv_meter_indicator_t* indic1 = lv_meter_add_arc(meter, scale, indic_w, lv_palette_main(LV_PALETTE_ORANGE), 0);   // orange颜色饼块
    lv_meter_set_indicator_start_value(meter, indic1, 0);
    lv_meter_set_indicator_end_value(meter, indic1, 40);
    lv_meter_indicator_t* indic2 = lv_meter_add_arc(meter, scale, indic_w, lv_palette_main(LV_PALETTE_YELLOW), 0); // yellow颜色饼块
    lv_meter_set_indicator_start_value(meter, indic2, 40); /*Start from the previous*/
    lv_meter_set_indicator_end_value(meter, indic2, 80);
    lv_meter_indicator_t* indic3 = lv_meter_add_arc(meter, scale, indic_w, lv_palette_main(LV_PALETTE_DEEP_ORANGE), 0); // deep orange颜色饼块
    lv_meter_set_indicator_start_value(meter, indic3, 80); /*Start from the previous*/
    lv_meter_set_indicator_end_value(meter, indic3, 100);
}

运行效果图