[英]react-native-camera (android): takePictureAsync() throws error
从 react-native-camera 调用 takePictureAsync() 后,我收到此错误:
{
"framesToPop": 1,
"nativeStackAndroid": [],
"userInfo": null,
"message": "Preview is paused - resume it before taking a picture.",
"code": "E_TAKE_PICTURE_FAILED",
"line": 2131,
"column": 45,
"sourceURL": "http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false"
}
所以我在调用 takePictureAsync() 之前尝试使用 resumePreview() 方法,现在我收到了不同的错误消息:
{
"framesToPop": 1,
"nativeStackAndroid": [],
"userInfo": null,
"message": "takePicture failed",
"code": "E_TAKE_PICTURE_FAILED",
"line": 2131,
"column": 45,
"sourceURL": "http://10.0.2.2:8081/index.bundle?platform=android&dev=true&minify=false"
}
我的组件和用法与https://react-native-community.github.io/react-native-camera/docs/rncamera相同
<RNCamera
ref={ref => {
this.camera = ref;
}}
style={styles.preview}
type={RNCamera.Constants.Type.back}
flashMode={RNCamera.Constants.FlashMode.on}
androidCameraPermissionOptions={{
title: 'Permission to use camera',
message: 'We need your permission to use your camera',
buttonPositive: 'Ok',
buttonNegative: 'Cancel',
}}
androidRecordAudioPermissionOptions={{
title: 'Permission to use audio recording',
message: 'We need your permission to use your audio',
buttonPositive: 'Ok',
buttonNegative: 'Cancel',
}}
onGoogleVisionBarcodesDetected={({ barcodes }) => {
console.log(barcodes);
}}
/>
takePicture = async () => {
if (this.camera) {
const options = { quality: 0.5, base64: true };
try {
this.camera.resumePreview();
const data = await this.camera.takePictureAsync(options);
console.log(data.uri);
} catch (error) {
console.log(JSON.stringify(error, null, 2));
}
}
};
版本:
"react-native": "0.61.2",
"react-native-camera": "git+https://git@github.com/react-native-community/react-native-camera.git",
在 iOS 上运行良好。 这是图书馆的问题还是我的实现?
尝试使用组件作为 FaCC (Function as Child Components)! 这种方式对我有用。
const PendingView = () => (
<View
style={{
flex: 1,
backgroundColor: 'lightgreen',
justifyContent: 'center',
alignItems: 'center',
}}
>
<Text>Waiting</Text>
</View>
);
class ExampleApp extends PureComponent {
render() {
return (
<View style={styles.container}>
<RNCamera
style={styles.preview}
type={RNCamera.Constants.Type.back}
>
{({ camera, status, recordAudioPermissionStatus }) => {
if (status !== 'READY') return <PendingView />;
return (
<View style={{ flex: 0, flexDirection: 'row', justifyContent: 'center' }}>
<TouchableOpacity onPress={() => this.takePicture(camera)} style={styles.capture}>
<Text style={{ fontSize: 14 }}> SNAP </Text>
</TouchableOpacity>
</View>
);
}}
</RNCamera>
</View>
);
}
takePicture = async function(camera) {
const options = { quality: 0.5, base64: true };
const data = await camera.takePictureAsync(options);
// eslint-disable-next-line
console.log(data.uri);
};
}
const styles = StyleSheet.create({
container: {
flex: 1,
flexDirection: 'column',
backgroundColor: 'black',
},
preview: {
flex: 1,
justifyContent: 'flex-end',
alignItems: 'center',
},
capture: {
flex: 0,
backgroundColor: '#fff',
borderRadius: 5,
padding: 15,
paddingHorizontal: 20,
alignSelf: 'center',
margin: 20,
},
});
这是图书馆的问题还是我的实现?
示例代码似乎有问题。 我注意到了同样的事情,我的解决方案类似于FredVieira,但不使用 FaCC。 除非 RNCamera 组件有子组件,否则相机似乎不会在 Android 上恢复。 因此,如果您将示例从
<RNCamera ... />
<View ...>
<TouchableOpacity ...>
<Text style={{ fontSize: 14 }}> SNAP </Text>
</TouchableOpacity>
</View>
到
<RNCamera ...>
<View ...>
<TouchableOpacity ...>
<Text style={{ fontSize: 14 }}> SNAP </Text>
</TouchableOpacity>
</View>
</RNCamera>
它应该工作。 所以你可以使用一个函数或一个组件,只要 RNCamera 有一个孩子。
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