android.graphics.Camera API 中文翻译

public class Camera extends Object


类:概述(Overview)

Camera实例可以被用来计算3D转换并生成一个矩阵,这个矩阵可以被应用为实例在一个Canvas画布上。



Public Constructors
Camera()
Creates a new camera, with empty transformations. 
创建一个Camera的实例,空参数代表没有任何的转换;

Public Methods
void applyToCanvas( Canvas canvas)
Computes the matrix corresponding to the current transformation and applies it to the specified Canvas.
计算对应当前变换矩阵应用指定画布上
Parameters
     canvas The Canvas to set the transform matrix onto.
将此画布设置到变换的Matrix 矩阵上面
float dotWithNormal(float dx, float dy, float dz)
float getLocationX()
Gets the x location of the camera.
获取camera对象X轴的位置
float getLocationY()
Gets the y location of the camera.
获取camera对象Y轴的位置
float getLocationZ()
Gets the z location of the camera.
获取camera对象Z轴的位置
void getMatrix( Matrix matrix)
Computes the matrix corresponding to the current transformation and copies it to the supplied matrix object.
计算对应当前变换矩阵复制提供矩阵对象中
Parameters
matrix The matrix to copy the current transforms into.
需要复制当前转换的矩阵.

void restore()
Restores the saved state, if any.
在任何情况下,恢复保存的状态;
void rotate(float x, float y, float z)
Applies a rotation transform around all three axis.
适用于Camera对象对应三个轴的旋转变换
Parameters
x The angle of rotation around the X axis, in degrees
y The angle of rotation around the Y axis, in degrees
z The angle of rotation around the Z axis, in degrees
x 以X轴为基准以度单位旋转的角度
y 以Y轴为基准以度单位旋转的角度
z 以Z轴为基准以度单位旋转的角度
See Also
void rotateX(float deg)
Applies a rotation transform around the X axis.
适用于绕X轴的旋转变换
Parameters
deg The angle of rotation around the X axis, in degrees
角度参数 以X轴为基准以度单位旋转的角度

void rotateY(float deg)
Applies a rotation transform around the Y axis.
适用于绕Y轴的旋转变换
Parameters
deg The angle of rotation around the Y axis, in degrees
角度参数  以Y轴为基准以度单位旋转的角度
void rotateZ(float deg)
Applies a rotation transform around the Z axis.
适用于绕Z轴的旋转变换
Parameters
deg The angle of rotation around the Z axis, in degrees
角度参数 以Z轴为基准以度单位旋转的角度
void save()
Saves the camera state.
保存Camera对象的状态,每次调用save都应与调用restore()相对应;
void setLocation(float x, float y, float z)
Sets the location of the camera.
设置Camera对象的位置, 默认 位置 设置   0, 0,-8
Parameters
x The x location of the camera
y The y location of the camera
z The z location of the camera
x 摄像机X轴的位置
y 摄像机Y轴的位置
z 摄像机Z轴的位置
void translate(float x, float y, float z)
Applies a translation transform on all three axis.
适用于在Camera对应所有三个轴上的平移转换
Parameters
x The distance to translate by on the X axis
y The distance to translate by on the Y axis
z The distance to translate by on the Z axis
x X轴上平移的距离
y Y 轴上平移的距离
z Z轴上平移的距离

Protected Methods
void finalize()
Invoked when the garbage collector has detected that this instance is no longer reachable.
垃圾回收 检测到 实例 不再 到达 时(不再有该实例被使用时) 调用;默认实现可以不做任何事情,可以重写此方法用来释放资源;


标注一下下面每行代码的作用package com.example.mapdemo; import android.content.Context; import android.content.Intent; import android.content.pm.PackageManager; import android.os.Bundle; import android.util.Log; import android.Manifest; import android.view.KeyEvent; import android.view.inputmethod.InputMethodManager; import android.widget.Toast; import androidx.activity.EdgeToEdge; import androidx.activity.result.ActivityResultLauncher; import androidx.activity.result.contract.ActivityResultContracts; import androidx.annotation.NonNull; import androidx.appcompat.app.AppCompatActivity; import androidx.core.graphics.Insets; import androidx.core.view.ViewCompat; import androidx.core.view.WindowInsetsCompat; import com.amap.api.location.AMapLocation; import com.amap.api.location.AMapLocationClient; import com.amap.api.location.AMapLocationClientOption; import com.amap.api.location.AMapLocationListener; import com.amap.api.maps.AMap; import com.amap.api.maps.CameraUpdate; import com.amap.api.maps.CameraUpdateFactory; import com.amap.api.maps.LocationSource; import com.amap.api.maps.UiSettings; import com.amap.api.maps.model.CameraPosition; import com.amap.api.maps.model.LatLng; import com.amap.api.maps.model.Marker; import com.amap.api.maps.model.MarkerOptions; import com.amap.api.services.core.AMapException; import com.amap.api.services.core.LatLonPoint; import com.amap.api.services.core.PoiItem; import com.amap.api.services.geocoder.GeocodeAddress; import com.amap.api.services.geocoder.GeocodeQuery; import com.amap.api.services.geocoder.GeocodeResult; import com.amap.api.services.geocoder.GeocodeSearch; import com.amap.api.services.geocoder.RegeocodeAddress; import com.amap.api.services.geocoder.RegeocodeQuery; import com.amap.api.services.geocoder.RegeocodeResult; import com.amap.api.services.poisearch.PoiResult; import com.amap.api.services.poisearch.PoiSearch; import com.example.mapdemo.databinding.ActivityMainBinding; import java.util.ArrayList; import java.util.List; publi
03-17
Pinning is deprecated since Android Q. Please use trim or other methods. 2025-10-21 16:12:37.614 7290-7290 CompatChangeReporter com.example.erweima D Compat change id reported: 377864165; UID 10218; state: ENABLED 2025-10-21 16:12:37.616 7290-7290 DesktopModeFlags com.example.erweima D Toggle override initialized to: OVERRIDE_UNSET 2025-10-21 16:12:37.642 7290-7290 example.erweima com.example.erweima I hiddenapi: Accessing hidden method Landroid/view/View;->computeFitSystemWindows(Landroid/graphics/Rect;Landroid/graphics/Rect;)Z (runtime_flags=0, domain=platform, api=unsupported) from Landroidx/appcompat/widget/ViewUtils; (domain=app) using reflection: allowed 2025-10-21 16:12:37.642 7290-7290 example.erweima com.example.erweima I hiddenapi: Accessing hidden method Landroid/view/ViewGroup;->makeOptionalFitsSystemWindows()V (runtime_flags=0, domain=platform, api=unsupported) from Landroidx/appcompat/widget/ViewUtils; (domain=app) using reflection: allowed 2025-10-21 16:12:37.707 7290-7290 CameraPreview com.example.erweima D resume() 2025-10-21 16:12:37.716 7290-7331 CameraInstance com.example.erweima D Opening camera 2025-10-21 16:12:37.755 7290-7290 HWUI com.example.erweima W Unknown dataspace 0 2025-10-21 16:12:37.768 7290-7331 CameraBase com.example.erweima I Connect camera (legacy API) - rotationOverride 1, forceSlowJpegMode 0 2025-10-21 16:12:37.801 7290-7331 CameraBase com.example.erweima W An error occurred while connecting to camera 1: Status(-8, EX_SERVICE_SPECIFIC): '1: validateClientPermissionsLocked:1788: Caller "com.example.erweima" (PID 7290, UID 10218) cannot open camera "10" without camera permission' 2025-10-21 16:12:37.804 7290-7331 CameraInstance com.example.erweima E Failed to open camera java.lang.RuntimeException: Fail to connect to camera service at android.hardware.Camera.<init>(Camera.java:597) at android.hardware.Camera.open(Camera.java:475) at android.hardware.Camera.open(Camera.java:464) at com.google.zxing.client.android.camera.open.OpenCameraInterface.open(OpenCameraInterface.java:83) at com.journeyapps.barcodescanner.camera.CameraManager.open(CameraManager.java:141) at com.journeyapps.barcodescanner.camera.CameraInstance$1.run(CameraInstance.java:200) at android.os.Handler.handleCallback(Handler.java:995) at android.os.Handler.dispatchMessage(Handler.java:103) at android.os.Looper.loopOnce(Looper.java:248) at android.os.Looper.loop(Looper.java:338) at android.os.HandlerThread.run(HandlerThread.java:85) 2025-10-21 16:12:37.844 7290-7331 CameraInstance com.example.erweima D Configuring camera 2025-10-21 16:12:37.847 7290-7331 CameraInstance com.example.erweima E Failed to configure camera java.lang.RuntimeException: Camera not open at com.journeyapps.barcodescanner.camera.CameraManager.configure(CameraManager.java:160) at com.journeyapps.barcodescanner.camera.CameraInstance$2.run(CameraInstance.java:213) at android.os.Handler.handleCallback(Handler.java:995) at android.os.Handler.dispatchMessage(Handler.java:103) at android.os.Looper.loopOnce(Looper.java:248) at android.os.Looper.loop(Looper.java:338) at android.os.HandlerThread.run(HandlerThread.java:85) 闪退
10-22
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