我尝试了很多方法,但我无法成功。我还没有找到任何适用于 Android 的源代码示例(关于 rekognition)
Developer Guide里面有JAVA的源代码,但是试了TT还是无法实现
我尝试通过从外部存储(从模拟器)发送图像文件来检测人脸 我不知道我做错了什么(我不擅长编码) 这是我的代码
AmazonRekognitionClient amazonRekognitionClient;
Image getAmazonRekognitionImage;
DetectFacesRequest detectFaceRequest;
DetectFacesResult detectFaceResult;
File file = new File(Environment.getExternalStorageDirectory(),"sungyeol.jpg.jpg");
public void test_00(View view) {
ByteBuffer imageBytes;
try{
InputStream inputStream = new FileInputStream(file.getAbsolutePath().toString());
imageBytes = ByteBuffer.wrap(IOUtils.toByteArray(inputStream));
Log.e("InputStream: ",""+inputStream);
Log.e("imageBytes: ","");
getAmazonRekognitionImage.withBytes(imageBytes);
// Initialize the Amazon Cognito credentials provider
CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
getApplicationContext(),
"us-east-2:.......", // Identity Pool ID
Regions.US_EAST_2 // Region
);
//I want "ALL" attributes
amazonRekognitionClient = new AmazonRekognitionClient(credentialsProvider);
detectFaceRequest = new DetectFacesRequest()
.withAttributes(Attribute.ALL.toString())
.withImage(getAmazonRekognitionImage);
detectFaceResult = amazonRekognitionClient.detectFaces(detectFaceRequest);
detectFaceResult.getFaceDetails();
}
catch(Exception ex){
Log.e("Error on something:","Message:"+ex.getMessage());
}
这是我的错误
02-04 09:30:07.268 29405-29405/? E/InputStream:: java.io.FileInputStream@a9b23e7
02-04 09:30:07.271 29405-29405/? E/Error on something:: Message:Attempt to invoke virtual method 'com.amazonaws.services.rekognition.model.Image com.amazonaws.services.rekognition.model.Image.withBytes(java.nio.ByteBuffer)' on a null object reference
什么是空对象引用? 我尝试更改文件路径,但他说没有这样的文件...当我更改为此路径时,上面有错误。 顺便说一句,我已经向用户请求了从 Android 模拟器访问文件夹的权限
请帮帮我 附言。抱歉我的英语不好
提前谢谢你。
最佳答案
现在我可以解决这些问题了。我经历过很多很多事情<3 <3 <3。 谢谢
我是泰国人,我不得不更加努力地寻找解决方案,因为缺乏特定语言的信息。这是我的解决方案。
我的解决方案是:
0.Rekognition 有一个设置端点--> http://docs.aws.amazon.com/general/latest/gr/rande.html#rekognition_region
1.在“空对象引用问题”上,我发现我必须先创建一个新对象,例如“Image image = new Image();” <-- “new” 命令在该类中创建一个对象实例
2.在上面的错误之后,又出现了更多的错误(Errors on NetworkOnMainThreadException),所以我尝试了一切直到找到这个页面--> https://docs.aws.amazon.com/cognito/latest/developerguide/getting-credentials.html该页面说...
因此,我查找了有关 AsyncTask 的更多信息,然后我创建了一个 AsyncTask 类,然后我将所有有关初始化、请求和响应的代码移至 AsyncTask 类。 ตอนรันตอนท้ายๆน้ำตาจิไหล 我的代码有效...TT 结论是 sungyeol.jpg.jpg 文件有效
例如
private void testTask(){
.... all code in the main thread particularly on the requests and responses
from the services
//print the response or the result
//Log.e() makes the message in the android monitor red like an error
Log.e("Response:", [responseparameter.toString()]);
}
//create the inherited class from the AsyncTask Class
//(you can create within your activity class)
class AsyncTaskRunner extends AsyncTask<String,String,String>{
@Override
public String doInBackground(String ... input){
testTask(); // call the testTask() method that i have created
return null; // this override method must return String
}
}
//I've created a button for running the task
public void buttonTask(View view){
AsyncTaskRunner runner = new AsyncTaskRunner();
runner.execute();
}
有关 AsyncTask 的更多信息:
https://developer.android.com/training/basics/network-ops/connecting.html#AsyncTask
http://www.compiletimeerror.com/2013/01/why-and-how-to-use-asynctask.html#.WJdkqVOLTIU
我希望这些帮助:)
关于java - 如何使用 Android Studio 在 Amazon Rekognition AWS 中检测人脸?,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/42041693/