在问这里之前我真的尝试了所有的链接。 我不知道该怎么做，我用Google搜索了所有内容并尝试了许多不同的方式，但没有任何工作。
我认为问题出在文件字符串路径中。这是我的主要代码：
package com.android.dji.eaglei;
import android.content.Intent;
import android.database.Cursor;
import android.net.Uri;
import android.os.Build;
import android.provider.MediaStore;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.Toast;
import com.amazonaws.auth.CognitoCachingCredentialsProvider;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferListener;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferObserver;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferState;
import com.amazonaws.mobileconnectors.s3.transferutility.TransferUtility;
import com.amazonaws.regions.Region;
import com.amazonaws.regions.Regions;
import com.amazonaws.services.s3.AmazonS3;
import com.amazonaws.services.s3.AmazonS3Client;
import com.amazonaws.services.s3.model.Tag;
import java.io.File;
public class MainActivity extends AppCompatActivity {
//for image upload
private ImageView imageView;
private Button button;
private static final int PICK_IMAGE = 1;
private Uri imageUri;
String imageName = "newTest.jpg";
private Button upload;
//
// for aws
String bucket = "eagleibucket";
File fileToUpload ;
AmazonS3 s3;
TransferUtility transferUtility;
//
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
// callback method to call credentialsProvider method.
credentialsProvider();
// callback method to call the setTransferUtility method
setTransferUtility();
//uploading image
imageView = (ImageView) findViewById(R.id.imageView);
button = (Button) findViewById(R.id.button);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
openGallery();
}
});
upload = (Button) findViewById(R.id.upload);
upload.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
setTransferUtility();
setFileToUpload(v);
}
});
}
protected void openGallery(){
Intent gallery = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(gallery,PICK_IMAGE);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
try {
if (resultCode == RESULT_OK && requestCode == PICK_IMAGE) {
imageUri = data.getData();
imageView.setImageURI(imageUri);
// aws uri img to upload
imageName = (String) imageView.getTag();
imageUri = data.getData();
imageView.setImageURI(imageUri);
} else {
Toast.makeText(this, "You haven't picked an image", Toast.LENGTH_LONG).show();
}
} catch (Exception e) {
Toast.makeText(this, "Something went wrong!", Toast.LENGTH_LONG).show();
}
}
public void credentialsProvider(){
// Initialize the Amazon Cognito credentials provider
CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
getApplicationContext(),
"us-west-2:edb44a70-b31e-44b0-b8c7-2d38a9c7c98f", // Identity pool ID
Regions.US_WEST_2 // Region
);
setAmazonS3Client(credentialsProvider);
}
/**
* Create a AmazonS3Client constructor and pass the credentialsProvider.
* @param credentialsProvider
*/
public void setAmazonS3Client(CognitoCachingCredentialsProvider credentialsProvider){
// Create an S3 client
s3 = new AmazonS3Client(credentialsProvider);
// Set the region of your S3 bucket
s3.setRegion(Region.getRegion(Regions.US_WEST_2));
}
public void setTransferUtility(){
transferUtility = new TransferUtility(s3, getApplicationContext());
}
/**
* This method is used to upload the file to S3 by using TransferUtility class
* @param view
*/
public void setFileToUpload(View view){
fileToUpload = new File(getRealPathFromURI(imageUri));
if (fileToUpload == null) {
Toast.makeText(this, "Could not find the filepath of the selected file", Toast.LENGTH_LONG).show();
// to make sure that file is not emapty or null
return;
}
TransferObserver transferObserver = transferUtility.upload(
bucket,
imageName,
fileToUpload
);
transferObserverListener(transferObserver);
}
/**
* This is listener method of the TransferObserver
* Within this listener method, we get status of uploading and downloading file,
* to display percentage of the part of file to be uploaded or downloaded to S3
* It displays an error, when there is a problem in uploading or downloading file to or from S3.
* @param transferObserver
*/
public void transferObserverListener(TransferObserver transferObserver){
transferObserver.setTransferListener(new TransferListener(){
@Override
public void onStateChanged(int id, TransferState state) {
Toast.makeText(getApplicationContext(), "State Change" + state,
Toast.LENGTH_SHORT).show();
}
@Override
public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {
int percentage = (int) (bytesCurrent/bytesTotal * 100);
Toast.makeText(getApplicationContext(), "Progress in %" + percentage,
Toast.LENGTH_SHORT).show();
}
@Override
public void onError(int id, Exception ex) {
Log.e("error","error");
}
});
}
private String getRealPathFromURI(Uri contentURI) {
String thePath = "no-path-found";
String[] filePathColumn = {MediaStore.Images.Media.DISPLAY_NAME};
Cursor cursor = getContentResolver().query(contentURI, filePathColumn, null, null, null);
if(cursor.moveToFirst()){
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
thePath = cursor.getString(columnIndex);
}
cursor.close();
return thePath;
}
}
清单：我添加了权限以及服务。我还添加了所需的库。
这是错误：
E/AndroidRuntime: FATAL EXCEPTION: main Process: com.android.dji.eaglei, PID:
java.lang.IllegalArgumentException: Invalid file:
at com.amazonaws.mobileconnectors.s3.transferutility.TransferUtility.upload(TransferUtility.java:478)
at com.amazonaws.mobileconnectors.s3.transferutility.TransferUtility.upload(TransferUtility.java:443)
at com.amazonaws.mobileconnectors.s3.transferutility.TransferUtility.upload(TransferUtility.java:412)
at com.amazonaws.mobileconnectors.s3.transferutility.TransferUtility.upload(TransferUtility.java:353)
at com.android.dji.eaglei.MainActivity.setFileToUpload(MainActivity.java:134)
at com.android.dji.eaglei.MainActivity$2.onClick(MainActivity.java:70)
at android.view.View.performClick(View.java:5716)
at android.widget.TextView.performClick(TextView.java:10926)
at android.view.View$PerformClick.run(View.java:22596)
at android.os.Handler.handleCallback(Handler.java:739)
at android.os.Handler.dispatchMessage(Handler.java:95)
at android.os.Looper.loop(Looper.java:148)
at android.app.ActivityThread.main(ActivityThread.java:7331)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1230)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1120)
感谢您的帮助！
答案 0 :(得分：0)
我认为您尝试上传的文件路径为空（因为没有在错误附近写入）。 尝试将fileToUpload与文件的路径，甚至是另一个文件的路径交换，仅用于检查。 当你成功使用它时，你可以试试你的文件并尝试查看fileToUpload的值是什么＆＃34; transferUtility.upload＆＃34;在应用程序运行期间。