NativeScript / NativeScript/plugins
[@nativescript/google-maps] CameraUpdate.fromCameraPosition causes NullPointerException: CameraPosition must not be null
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- 主要语言
- TypeScript
- 星标
- 206
- 派生
- 123
- 平均合并
- 2 天 1 小时
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描述
On Android, using GoogleMaps.CameraUpdate.fromCameraPosition() to update the map's camera, especially when including bearing, results in a java.lang.NullPointerException from the native Google Maps SDK.
Steps to Reproduce
-
Set up a blank nativescript-vue project
-
Initialize a nativescript/google-maps MapView.
-
Attempt to create a CameraUpdate using GoogleMaps.CameraUpdate.fromCameraPosition() with a valid CameraPosition object.
import * as GoogleMaps from '@nativescript/google-maps';
// Assume 'map' is an initialized GoogleMaps.GoogleMap instance
// Assume 'map.cameraPosition' has valid data.
// Assume 'newHeading' is a valid number (e.g., from device orientation).
const newCameraPosition: GoogleMaps.CameraPosition = {
target: map.cameraPosition.target,
zoom: map.cameraPosition.zoom,
tilt: map.cameraPosition.tilt,
bearing: newHeading, // Or any valid number, e.g., 20
};
console.log('Input newCameraPosition:', JSON.stringify(newCameraPosition)); // This logs a valid object
try {
const cameraUpdate = GoogleMaps.CameraUpdate.fromCameraPosition(newCameraPosition);
// This line below is never reached
console.log('CameraUpdate created successfully.');
} catch (e: any) {
console.error("Error creating CameraUpdate:", e);
if (global.isAndroid && e.nativeException) {
console.error("Native Android Exception:", e.nativeException);
}
}
Observed Error :
Error creating CameraUpdate fromCameraPosition: Error: java.lang.NullPointerException: cameraPosition must not be null
Native Android Exception during CameraUpdate creation: java.lang.NullPointerException: cameraPosition must not be null
Context & Impact :
-
The newCameraPosition JavaScript object supplied to fromCameraPosition is confirmed to be valid (no null, undefined, or NaN values).
-
This specific NullPointerException indicates an issue in the plugin's native bridge when converting the JavaScript CameraPosition object for fromCameraPosition.
-
As per the plugin's CameraUpdate API, fromCameraPosition is the only method that allows for setting the bearing alongside other camera parameters.
-
This bug currently prevents any programmatic control over the map's bearing, which is critical for features like compass-oriented maps.
Environment
- nativescript-vue: "3.0.1"
- @nativescript/google-maps : "1.8.0"
- Platform: Android
- Device Model: emulated Pixel 4 but also on hardware
贡献指南
从这里开始
- 先读完整个 Issue,再读项目的贡献指南。
- 在 Issue 下留言说明你要接手 —— 这能避免两个人做同样的事。
- Fork 仓库,在一个分支上完成修改。
- 提交 Pull Request,并在描述里引用这个 Issue 编号。
调研方向
从 CameraUpdate.fromCameraPosition 的 Android 实现开始,并使用此 issue 中的 TypeScript 示例复现该故障。跟踪所提供的 CameraPosition 通过 native bridge 的转换过程;当能够创建有效的 CameraUpdate 且不发生 NullPointerException 时即表示完成,包括设置 bearing 的情况。
由索引模型根据 Issue 内容生成。
评估
- 技术栈
- android, typescript
- 领域
- mobile
- Issue 类型
- 缺陷
- 难度
- 3/5
- 预计耗时
- 1-2 天
- 活跃度
- 停滞
- 描述清晰度
- 基本清楚
- 新手友好度
- 42/100