When use the method setTargetResolution, the metadata would be lost.

[luoyexk]

Use the code below to query metadata.

    val model = ExifInterface(savedUri.toFile()).getAttribute(ExifInterface.TAG_MODEL)
    Log.d(TAG, "Photo capture succeeded: model ==> $model")

Here is patch.

The target branch hash is : 852767fd 2021/5/27 at 21:32

Index: CameraXBasic/app/src/main/AndroidManifest.xml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- CameraXBasic/app/src/main/AndroidManifest.xml	(revision 852767fddd25b0f33e117d811bd5cdb6694b8904)
+++ CameraXBasic/app/src/main/AndroidManifest.xml	(date 1624348335530)
@@ -41,7 +41,7 @@
             android:clearTaskOnLaunch="true"
             android:theme="@style/AppTheme"
             android:icon="@mipmap/ic_launcher"
-            android:screenOrientation="fullUser"
+            android:screenOrientation="portrait"
             android:rotationAnimation="seamless"
             android:resizeableActivity="true"
             android:configChanges="orientation|screenLayout|screenSize|smallestScreenSize"
Index: CameraXBasic/app/src/main/res/layout/fragment_camera.xml
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- CameraXBasic/app/src/main/res/layout/fragment_camera.xml	(revision 852767fddd25b0f33e117d811bd5cdb6694b8904)
+++ CameraXBasic/app/src/main/res/layout/fragment_camera.xml	(date 1624354469810)
@@ -14,8 +14,8 @@
   ~ See the License for the specific language governing permissions and
   ~ limitations under the License.
   -->
-<androidx.constraintlayout.widget.ConstraintLayout
-    xmlns:android="http://schemas.android.com/apk/res/android"
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     android:id="@+id/camera_container"
     android:background="@android:color/black"
     android:layout_width="match_parent"
@@ -24,6 +24,8 @@
     <androidx.camera.view.PreviewView
         android:id="@+id/view_finder"
         android:layout_width="match_parent"
-        android:layout_height="match_parent" />
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintDimensionRatio="W, 3:4"
+        android:layout_height="0dp" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>
\ No newline at end of file
Index: CameraXBasic/app/src/main/java/com/android/example/cameraxbasic/fragments/CameraFragment.kt
IDEA additional info:
Subsystem: com.intellij.openapi.diff.impl.patch.CharsetEP
<+>UTF-8
===================================================================
--- CameraXBasic/app/src/main/java/com/android/example/cameraxbasic/fragments/CameraFragment.kt	(revision 852767fddd25b0f33e117d811bd5cdb6694b8904)
+++ CameraXBasic/app/src/main/java/com/android/example/cameraxbasic/fragments/CameraFragment.kt	(date 1624355800525)
@@ -30,6 +30,7 @@
 import android.os.Build
 import android.os.Bundle
 import android.util.Log
+import android.util.Size
 import android.view.KeyEvent
 import android.view.LayoutInflater
 import android.view.View
@@ -52,6 +53,7 @@
 import androidx.core.content.ContextCompat
 import androidx.core.net.toFile
 import androidx.core.view.setPadding
+import androidx.exifinterface.media.ExifInterface
 import androidx.fragment.app.Fragment
 import androidx.lifecycle.lifecycleScope
 import androidx.localbroadcastmanager.content.LocalBroadcastManager
@@ -290,7 +292,7 @@
         // Preview
         preview = Preview.Builder()
                 // We request aspect ratio but no resolution
-                .setTargetAspectRatio(screenAspectRatio)
+                .setTargetResolution(Size(3648, 2736))
                 // Set initial target rotation
                 .setTargetRotation(rotation)
                 .build()
@@ -300,7 +302,7 @@
                 .setCaptureMode(ImageCapture.CAPTURE_MODE_MINIMIZE_LATENCY)
                 // We request aspect ratio but no resolution to match preview config, but letting
                 // CameraX optimize for whatever specific resolution best fits our use cases
-                .setTargetAspectRatio(screenAspectRatio)
+                .setTargetResolution(Size(3648, 2736))
                 // Set initial target rotation, we will have to call this again if rotation changes
                 // during the lifecycle of this use case
                 .setTargetRotation(rotation)
@@ -309,7 +311,7 @@
         // ImageAnalysis
         imageAnalyzer = ImageAnalysis.Builder()
                 // We request aspect ratio but no resolution
-                .setTargetAspectRatio(screenAspectRatio)
+                .setTargetResolution(Size(3648, 2736))
                 // Set initial target rotation, we will have to call this again if rotation changes
                 // during the lifecycle of this use case
                 .setTargetRotation(rotation)
@@ -411,6 +413,9 @@
                         val savedUri = output.savedUri ?: Uri.fromFile(photoFile)
                         Log.d(TAG, "Photo capture succeeded: $savedUri")
 
+                        val model = ExifInterface(savedUri.toFile()).getAttribute(ExifInterface.TAG_MODEL)
+                        Log.d(TAG, "Photo capture succeeded: model ==> $model")
+
                         // We can only change the foreground Drawable using API level 23+ API
                         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                             // Update the gallery thumbnail with latest picture taken

I found that the metadata lost after androidx.camera.core.internal.utils.ImageUtil#cropByteArray called.