From 6874aa81f3a566fa2846f0b76a0301e2d8d13435 Mon Sep 17 00:00:00 2001
From: tongzihan <15671769870@163.com>
Date: Wed, 6 Aug 2025 11:49:27 +0800
Subject: [PATCH] =?UTF-8?q?=E6=9B=9D=E5=85=89=E4=B8=AD=E5=BF=83=E7=82=B9?=
 =?UTF-8?q?=E8=AE=BE=E7=BD=AE?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../main/ets/cameramanagers/CameraManager.ets | 26 +++++++++++++++++++
 entry/src/main/ets/pages/Index.ets            | 24 ++++++++++++++++-
 2 files changed, 49 insertions(+), 1 deletion(-)

diff --git a/camera/src/main/ets/cameramanagers/CameraManager.ets b/camera/src/main/ets/cameramanagers/CameraManager.ets
index afa66c2..2300c3b 100644
--- a/camera/src/main/ets/cameramanagers/CameraManager.ets
+++ b/camera/src/main/ets/cameramanagers/CameraManager.ets
@@ -87,6 +87,7 @@ export class CameraManager {
       // [End session]
       this.session = session as (camera.PhotoSession | camera.VideoSession);
       this.setFocusMode(camera.FocusMode.FOCUS_MODE_AUTO);
+      this.setExposureMode(camera.ExposureMode.EXPOSURE_MODE_AUTO);
     } catch (e) {
       Logger.error(TAG, `Failed to start camera session. Cause ${JSON.stringify(e)}`);
     }
@@ -156,6 +157,31 @@ export class CameraManager {
   }
   // [End setFocusPoint]
 
+  // [Start setExposureMode]
+  setExposureMode(exposureMode: camera.ExposureMode) {
+    try {
+      const isSupported = this.session?.isExposureModeSupported(exposureMode);
+      if (!isSupported) {
+        Logger.error(TAG, `setExposureMode error: focus mode ${exposureMode} is not supported`);
+        return;
+      }
+      this.session?.setExposureMode(exposureMode);
+    } catch(e) {
+      Logger.error(TAG, 'setExposureMode error ' + JSON.stringify(e));
+    }
+  }
+  // [End setExposureMode]
+
+  // [Start setMeteringPoint]
+  setMeteringPoint(point: camera.Point) {
+    try {
+      this.session?.setMeteringPoint(point);
+    } catch(e) {
+      Logger.error(TAG, 'setMeteringPoint error ' + JSON.stringify(e));
+    }
+  }
+  // [End setMeteringPoint]
+
   setZoomRatio(zoom: number) {
     try {
       this.session?.setZoomRatio(zoom);
diff --git a/entry/src/main/ets/pages/Index.ets b/entry/src/main/ets/pages/Index.ets
index c03def1..3e94243 100644
--- a/entry/src/main/ets/pages/Index.ets
+++ b/entry/src/main/ets/pages/Index.ets
@@ -75,6 +75,7 @@ struct Index {
   private focusBoxTimer: RefreshableTimer = new RefreshableTimer(() => {
     this.isFocusBoxVisible = false;
   }, 3 * 1000);
+  private exposureFontSize: number = 24;
 
   @State isSleeping: boolean = false;
   private sleepTimer?: RefreshableTimer;
@@ -286,10 +287,11 @@ struct Index {
             previewSize.height
           );
           this.cameraManager.setFocusPoint(cameraPoint);
+          this.cameraManager.setMeteringPoint(cameraPoint);
           this.focusBoxPosition = getClampedChildPosition(this.focusBoxSize, {
             width: this.getUIContext().px2vp(previewSize.width),
             height: this.getUIContext().px2vp(previewSize.height)
-          }, event)
+          }, event);
           this.focusBoxTimer.refresh();
         })
       // [EndExclude Stack]
@@ -308,6 +310,10 @@ struct Index {
           .width(80)
           .height(80)
           .position(this.focusBoxPosition)
+        SymbolGlyph($r('sys.symbol.sun_max'))
+          .fontSize(this.exposureFontSize)
+          .fontColor([Color.White])
+          .position(this.getExposurePosition())
       }
 
       if(this.isDelayTakePhoto){
@@ -405,6 +411,22 @@ struct Index {
     return this.PreviewImageHeight / displayRatio;
   }
 
+  getExposurePosition(): Edges {
+    const focusBoxLeft = this.focusBoxPosition.left as number;
+    const focusBoxTop = this.focusBoxPosition.top as number;
+    const exposureWidth = this.exposureFontSize;
+    const exposureHeight = this.exposureFontSize;
+    const focusBoxWidth = this.focusBoxSize.width;
+    const focusBoxHeight = this.focusBoxSize.height;
+    const previewWidth = this.getUIContext().px2vp(this.previewVM.previewSize.width);
+    const GAP = 10;
+    const top = focusBoxTop - exposureHeight / 2 + focusBoxHeight / 2;
+    const left = focusBoxLeft > previewWidth / 2
+      ? focusBoxLeft - GAP - exposureWidth
+      : focusBoxLeft + focusBoxWidth + GAP;
+    return { top, left };
+  }
+
   @Builder
   previewImageView() {
     Image(this.previewImage)
-- 
Gitee