我正在开发一个 android 应用程序来将文件上传到亚马逊 s3 服务器。它工作正常。现在，我想在应用程序中添加暂停和恢复功能。我正在使用传输效用函数。是否有任何解决方案或如何通过共享偏好来实现？请帮我。
MainActivity.java
public class MainActivity extends AppCompatActivity {
Button button;
Button pause;
Button resume;
TextView size;
TextView completed;
TextView per;
static String filePath = "";
static String extension = "";
static String fileTempName = "";
float percentage = 0;
Uri selectedFileUri = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
button = (Button) findViewById(R.id.button);
pause = (Button) findViewById(R.id.pause);
resume = (Button) findViewById(R.id.resume);
size = (TextView) findViewById(R.id.size);
completed = (TextView) findViewById(R.id.completed);
per = (TextView) findViewById(R.id.per);
button.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent = new Intent();
intent.setType("*/*");
intent.setAction(Intent.ACTION_GET_CONTENT);
startActivityForResult(Intent.createChooser(intent, "Select File"), 1);
}
});
pause.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Toast.makeText(MainActivity.this, "clicked",Toast.LENGTH_SHORT).show();
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
if (requestCode == 1 && resultCode == RESULT_OK) {
selectedFileUri = data.getData();
filePath = new PathUtils().getPath(MainActivity.this, selectedFileUri);
extension = filePath.substring(filePath.lastIndexOf("."));
Log.d("LOGTAG", "extension : "+extension);
fileUpload();
}
}
private void fileUpload() {
File file = new File(filePath);
String timeStamp = new SimpleDateFormat("yyyyMMddHHmmss").format(new Date());
Random Number = new Random();
int Rnumber = Number.nextInt(10000000);
fileTempName = Rnumber +timeStamp+extension;
Log.d("LOGTAG", "timestamp" + fileTempName);// Initialize the Amazon Cognito credentials provider
CognitoCachingCredentialsProvider credentialsProvider = new CognitoCachingCredentialsProvider(
getApplicationContext(),
"xxxxx:xxx-xxxxxxx-xxx-xxxxxxx", // Identity Pool ID
Regions.REGION // Region
);
AmazonS3 s3 = new AmazonS3Client(credentialsProvider);
s3.setRegion(com.amazonaws.regions.Region.getRegion(Regions.AP_SOUTH_1));
try {
s3.putObject(new PutObjectRequest(
BUCKET-NAME, fileTempName, file).withCannedAcl(CannedAccessControlList.PublicRead)); // this will set the permission as PublicRead
} catch (Exception ex) {
ex.getMessage();
}
TransferUtility transferUtility = new TransferUtility(s3, this);
TransferObserver transferObserver = transferUtility.upload("BUCKET-NAME",fileTempName,file);
putObjectRequest.withCannedAcl(CannedAccessControlList.PublicRead); // public for all
s3.putObject(putObjectRequest); // upload file*/
transferObserver.setTransferListener(new TransferListener() {
@Override
public void onStateChanged(int id, TransferState state) {
if(state == TransferState.COMPLETED) {
Toast.makeText(MainActivity.this,"Error",Toast.LENGTH_SHORT).show();
}
}
@Override
public void onProgressChanged(int id, long bytesCurrent, long bytesTotal) {
/*int percentage = (int) (bytesCurrent / bytesTotal * 100);
Log.d("LOGTAG", "Percentage : " + percentage);*/
long _bytesCurrent = bytesCurrent;
long _bytesTotal = bytesTotal;
percentage = ((float)_bytesCurrent /(float)_bytesTotal * 100);
String pr = String.format("%.2f", percentage);
per.setText(pr + "%");
completed.setText(Long.toString(bytesCurrent));
size.setText(Long.toString(bytesTotal));
Log.d("percentage","Per1 : " +percentage);
Log.d("LOGTAG", String.format("onProgressChanged: %d, total: %d, current: %d ",
id, bytesTotal, bytesCurrent));
}
@Override
public void onError(int id, Exception ex) {
Log.e("LOGTAG", "Error : " + ex.getMessage());
}
});
}
}