android 12 锁屏界面图标太小

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1.先找到图标ic_unlock.xml
2.更具图标找到

SystemUI$ grep "ic_unlock" * -Rn
src/com/android/keyguard/LockIconViewController.java:179:            R.drawable.ic_unlock,

3.定位到控件
src/com/android/keyguard/LockIconView

4.定位到layout

    <com.android.keyguard.LockIconView
        android:id="@+id/lock_icon_view"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content">
        <!-- Background protection -->
        <ImageView
            android:id="@+id/lock_icon_bg"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:background="@drawable/fingerprint_bg"
            android:visibility="invisible"/>

        <ImageView
            android:id="@+id/lock_icon"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:padding="@dimen/lock_icon_padding"
            android:layout_gravity="center"
            android:scaleType="centerCrop"/>

        <!-- Fingerprint -->
        <!-- AOD dashed fingerprint icon with moving dashes -->
        <com.airbnb.lottie.LottieAnimationView
            android:id="@+id/lock_udfps_aod_fp"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:padding="@dimen/lock_icon_padding"
            android:layout_gravity="center"
            android:scaleType="centerCrop"
            systemui:lottie_autoPlay="false"
            systemui:lottie_loop="true"
            systemui:lottie_rawRes="@raw/udfps_aod_fp"/>
    </com.android.keyguard.LockIconView>

修改内边距大小

    <!-- Padding for the lock icon on the keyguard. In pixels - should not scale with display size. -->
    <dimen name="lock_icon_padding">0px</dimen>

旋转图标方向

Index: src/com/android/keyguard/LockIconViewController.java
@@ -268,7 +268,7 @@
         mShowAODFpIcon = mIsDozing && mUdfpsEnrolled && !mRunningFPS;
 
         final CharSequence prevContentDescription = mView.getContentDescription();
-        mView.setRotation(180);
+        mView.setRotation(0);
         if (mShowLockIcon) {
             mView.setImageDrawable(mLockIcon);
             mView.setVisibility(View.VISIBLE);

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