[英]Android, How to upload file to DropBox automatically in background (I have a code!)
我对以下代码（来自Github）进行了一些修改，以使其将视频而不是图片上传到dropBox，并且工作正常。 但是我必须单击将我定向到Android上的Gallery的按钮，然后才能选择要上传的视频文件。
我想要的是每当我启动应用程序时都直接上传特定的视频文件，而无需单击任何按钮！ 我的意思是直接转到“ /sdcard/DCIM/Camera/20140920_125202.mp4”（或任何其他选择的目录）并上传视频。
我尝试将以下内容添加到“ onCreate”中，以使其在应用程序启动时上传视频，但这不起作用吗？
Uri uri = null;
uri = Uri.parse("/sdcard/DCIM/Camera/20140920_125202.mp4");
File file = new File(getRealPathFromURI(uri));
UploadPicture upload = new UploadPicture(this, mApi,PHOTO_DIR, file);
upload.execute();
码：
@SuppressLint("SimpleDateFormat")
public class DBRoulette extends Activity {
private static final String TAG = "DBRoulette";
final static private String APP_KEY = "6c9q8fbtktytgi6";
final static private String APP_SECRET = "xxxxxxxxxxxxxxx";
// You don't need to change these, leave them alone.
final static private String ACCOUNT_PREFS_NAME = "prefs";
final static private String ACCESS_KEY_NAME = "ACCESS_KEY";
final static private String ACCESS_SECRET_NAME = "ACCESS_SECRET";
private static final boolean USE_OAUTH1 = false;
DropboxAPI<AndroidAuthSession> mApi;
private boolean mLoggedIn;
// Android widgets
private Button mSubmit;
private RelativeLayout mDisplay;
private Button mGallery;
private ImageView mImage;
private final String PHOTO_DIR = "/Motion/";
@SuppressWarnings("unused")
final static private int NEW_PICTURE = 50;
private String mCameraFileName;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mCameraFileName = savedInstanceState.getString("mCameraFileName");
}
// We create a new AuthSession so that we can use the Dropbox API.
AndroidAuthSession session = buildSession();
mApi = new DropboxAPI<AndroidAuthSession>(session);
// Basic Android widgets
setContentView(R.layout.main);
checkAppKeySetup();
mSubmit = (Button) findViewById(R.id.auth_button);
mSubmit.setOnClickListener(new OnClickListener() {
@SuppressWarnings("deprecation")
public void onClick(View v) {
// This logs you out if you're logged in, or vice versa
if (mLoggedIn) {
logOut();
} else {
// Start the remote authentication
if (USE_OAUTH1) {
mApi.getSession().startAuthentication(DBRoulette.this);
} else {
mApi.getSession().startOAuth2Authentication(
DBRoulette.this);
}
}
}
});
mDisplay = (RelativeLayout) findViewById(R.id.logged_in_display);
// This is where a photo is displayed
mImage = (ImageView) findViewById(R.id.image_view);
// This is the button to take a file from gallery
mGallery = (Button) findViewById(R.id.gallery_button);
mGallery.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setType("*/*");
intent.setAction(Intent.ACTION_PICK);
try {
startActivityForResult(intent, 1);
} catch (ActivityNotFoundException e) {
showToast("There doesn't seem to be a gallery.");
}
}
});
// Display the proper UI state if logged in or not
setLoggedIn(mApi.getSession().isLinked());
}
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putString("mCameraFileName", mCameraFileName);
super.onSaveInstanceState(outState);
}
@Override
protected void onResume() {
super.onResume();
AndroidAuthSession session = mApi.getSession();
// The next part must be inserted in the onResume() method of the
// activity from which session.startAuthentication() was called, so
// that Dropbox authentication completes properly.
if (session.authenticationSuccessful()) {
try {
// Mandatory call to complete the auth
session.finishAuthentication();
// Store it locally in our app for later use
storeAuth(session);
setLoggedIn(true);
} catch (IllegalStateException e) {
showToast("Couldn't authenticate with Dropbox:"
+ e.getLocalizedMessage());
Log.i(TAG, "Error authenticating", e);
}
}
}
// This is what gets called on finishing a media piece to import
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// return from file upload
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 1) {
Uri uri = null;
if (data != null) {
uri = Uri.parse(data.getData().toString());
}
File file = new File(getRealPathFromURI(uri));
if (uri != null) {
UploadPicture upload = new UploadPicture(this, mApi,PHOTO_DIR, file);
upload.execute();
}
} else if(requestCode == 2){
Uri uri = null;
if (data != null) {
uri = data.getData();
}
if (uri == null && mCameraFileName != null) {
uri = Uri.fromFile(new File(mCameraFileName));
}
File file = new File(mCameraFileName);
if (uri != null) {
UploadPicture upload = new UploadPicture(this, mApi,
PHOTO_DIR, file);
upload.execute();
}
}
} else {
Log.w(TAG, "Unknown Activity Result from mediaImport: "
+ resultCode);
}
}
private void logOut() {
// Remove credentials from the session
mApi.getSession().unlink();
// Clear our stored keys
clearKeys();
// Change UI state to display logged out version
setLoggedIn(false);
}
@SuppressWarnings("deprecation")
public String getRealPathFromURI(Uri contentUri)
{
String[] proj = { MediaStore.Audio.Media.DATA };
Cursor cursor = managedQuery(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
/**
* Convenience function to change UI state based on being logged in
*/
private void setLoggedIn(boolean loggedIn) {
mLoggedIn = loggedIn;
if (loggedIn) {
mSubmit.setText("Logout from Dropbox");
mDisplay.setVisibility(View.VISIBLE);
} else {
mSubmit.setText("Login with Dropbox");
mDisplay.setVisibility(View.GONE);
mImage.setImageDrawable(null);
}
}
private void checkAppKeySetup() {
// Check to make sure that we have a valid app key
if (APP_KEY.startsWith("CHANGE") || APP_SECRET.startsWith("CHANGE")) {
showToast("You must apply for an app key and secret from developers.dropbox.com, and add them to the DBRoulette ap before trying it.");
finish();
return;
}
// Check if the app has set up its manifest properly.
Intent testIntent = new Intent(Intent.ACTION_VIEW);
String scheme = "db-" + APP_KEY;
String uri = scheme + "://" + AuthActivity.AUTH_VERSION + "/test";
testIntent.setData(Uri.parse(uri));
PackageManager pm = getPackageManager();
if (0 == pm.queryIntentActivities(testIntent, 0).size()) {
showToast("URL scheme in your app's "
+ "manifest is not set up correctly. You should have a "
+ "com.dropbox.client2.android.AuthActivity with the "
+ "scheme: " + scheme);
finish();
}
}
private void showToast(String msg) {
Toast error = Toast.makeText(this, msg, Toast.LENGTH_LONG);
error.show();
}
/**
* Shows keeping the access keys returned from Trusted Authenticator in a
* local store, rather than storing user name & password, and
* re-authenticating each time (which is not to be done, ever).
*/
private void loadAuth(AndroidAuthSession session) {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME, 0);
String key = prefs.getString(ACCESS_KEY_NAME, null);
String secret = prefs.getString(ACCESS_SECRET_NAME, null);
if (key == null || secret == null || key.length() == 0
|| secret.length() == 0)
return;
if (key.equals("oauth2:")) {
// If the key is set to "oauth2:", then we can assume the token is
// for OAuth 2.
session.setOAuth2AccessToken(secret);
} else {
// Still support using old OAuth 1 tokens.
session.setAccessTokenPair(new AccessTokenPair(key, secret));
}
}
/**
* Shows keeping the access keys returned from Trusted Authenticator in a
* local store, rather than storing user name & password, and
* re-authenticating each time (which is not to be done, ever).
*/
private void storeAuth(AndroidAuthSession session) {
// Store the OAuth 2 access token, if there is one.
String oauth2AccessToken = session.getOAuth2AccessToken();
if (oauth2AccessToken != null) {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME,
0);
Editor edit = prefs.edit();
edit.putString(ACCESS_KEY_NAME, "oauth2:");
edit.putString(ACCESS_SECRET_NAME, oauth2AccessToken);
edit.commit();
return;
}
// Store the OAuth 1 access token, if there is one. This is only
// necessary if
// you're still using OAuth 1.
AccessTokenPair oauth1AccessToken = session.getAccessTokenPair();
if (oauth1AccessToken != null) {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME,
0);
Editor edit = prefs.edit();
edit.putString(ACCESS_KEY_NAME, oauth1AccessToken.key);
edit.putString(ACCESS_SECRET_NAME, oauth1AccessToken.secret);
edit.commit();
return;
}
}
private void clearKeys() {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME, 0);
Editor edit = prefs.edit();
edit.clear();
edit.commit();
}
private AndroidAuthSession buildSession() {
AppKeyPair appKeyPair = new AppKeyPair(APP_KEY, APP_SECRET);
AndroidAuthSession session = new AndroidAuthSession(appKeyPair);
loadAuth(session);
return session;
}
}
这听起来像是AsyncTask的工作，看着您的代码，看起来您已使所有代码正确上传，您可能只需要将其卸载到后台线程即可。 然后，当一切完成后，可以将回调发送到您的主应用程序线程。
如果需要，您还可以在过程中使用显示的加载指示器，但这是可选的。
http://developer.android.com/reference/android/os/AsyncTask.html
我通过在定义的“ mApi”之后添加一些修改来解决我的问题。 现在，当我调用应用程序时，该应用程序会将视频文件“ 20140920_125202.mp4”直接上传到dropBox。 谢谢大家
@SuppressLint("SimpleDateFormat")
public class DBRoulette extends Activity {
private static final String TAG = "DBRoulette";
final static private String APP_KEY = "6c9q8fbtktytgi6";
final static private String APP_SECRET = "xxxxxxxxxxxxxxx";
// You don't need to change these, leave them alone.
final static private String ACCOUNT_PREFS_NAME = "prefs";
final static private String ACCESS_KEY_NAME = "ACCESS_KEY";
final static private String ACCESS_SECRET_NAME = "ACCESS_SECRET";
private static final boolean USE_OAUTH1 = false;
DropboxAPI<AndroidAuthSession> mApi;
private boolean mLoggedIn;
// Android widgets
private Button mSubmit;
private RelativeLayout mDisplay;
private Button mGallery;
private ImageView mImage;
private final String PHOTO_DIR = "/Motion/";
@SuppressWarnings("unused")
final static private int NEW_PICTURE = 50;
private String mCameraFileName;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (savedInstanceState != null) {
mCameraFileName = savedInstanceState.getString("mCameraFileName");
}
// We create a new AuthSession so that we can use the Dropbox API.
AndroidAuthSession session = buildSession();
mApi = new DropboxAPI<AndroidAuthSession>(session);
// Basic Android widgets
setContentView(R.layout.main);
checkAppKeySetup();
mSubmit = (Button) findViewById(R.id.auth_button);
mSubmit.setOnClickListener(new OnClickListener() {
@SuppressWarnings("deprecation")
public void onClick(View v) {
// This logs you out if you're logged in, or vice versa
if (mLoggedIn) {
logOut();
} else {
// Start the remote authentication
if (USE_OAUTH1) {
mApi.getSession().startAuthentication(DBRoulette.this);
} else {
mApi.getSession().startOAuth2Authentication(
DBRoulette.this);
}
}
}
});
mDisplay = (RelativeLayout) findViewById(R.id.logged_in_display);
// This is where a photo is displayed
mImage = (ImageView) findViewById(R.id.image_view);
// This is the button to take a file from gallery
mGallery = (Button) findViewById(R.id.gallery_button);
mGallery.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
Intent intent = new Intent();
intent.setType("*/*");
intent.setAction(Intent.ACTION_PICK);
try {
startActivityForResult(intent, 1);
} catch (ActivityNotFoundException e) {
showToast("There doesn't seem to be a gallery.");
}
}
});
File outFile = new File("/mnt/sdcard/DCIM/Camera/20140920_125202.mp4");
mCameraFileName = outFile.toString();
UploadPicture upload = new UploadPicture(DBRoulette.this, mApi, PHOTO_DIR,outFile);
upload.execute();
// Display the proper UI state if logged in or not
setLoggedIn(mApi.getSession().isLinked());
}
@Override
protected void onSaveInstanceState(Bundle outState) {
outState.putString("mCameraFileName", mCameraFileName);
super.onSaveInstanceState(outState);
}
@Override
protected void onResume() {
super.onResume();
AndroidAuthSession session = mApi.getSession();
// The next part must be inserted in the onResume() method of the
// activity from which session.startAuthentication() was called, so
// that Dropbox authentication completes properly.
if (session.authenticationSuccessful()) {
try {
// Mandatory call to complete the auth
session.finishAuthentication();
// Store it locally in our app for later use
storeAuth(session);
setLoggedIn(true);
} catch (IllegalStateException e) {
showToast("Couldn't authenticate with Dropbox:"
+ e.getLocalizedMessage());
Log.i(TAG, "Error authenticating", e);
}
}
}
// This is what gets called on finishing a media piece to import
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
// return from file upload
if (resultCode == Activity.RESULT_OK) {
if (requestCode == 1) {
Uri uri = null;
if (data != null) {
uri = Uri.parse(data.getData().toString());
}
File file = new File(getRealPathFromURI(uri));
if (uri != null) {
UploadPicture upload = new UploadPicture(this, mApi,PHOTO_DIR, file);
upload.execute();
}
} else if(requestCode == 2){
Uri uri = null;
if (data != null) {
uri = data.getData();
}
if (uri == null && mCameraFileName != null) {
uri = Uri.fromFile(new File(mCameraFileName));
}
File file = new File(mCameraFileName);
if (uri != null) {
UploadPicture upload = new UploadPicture(this, mApi,
PHOTO_DIR, file);
upload.execute();
}
}
} else {
Log.w(TAG, "Unknown Activity Result from mediaImport: "
+ resultCode);
}
}
private void logOut() {
// Remove credentials from the session
mApi.getSession().unlink();
// Clear our stored keys
clearKeys();
// Change UI state to display logged out version
setLoggedIn(false);
}
@SuppressWarnings("deprecation")
public String getRealPathFromURI(Uri contentUri)
{
String[] proj = { MediaStore.Audio.Media.DATA };
Cursor cursor = managedQuery(contentUri, proj, null, null, null);
int column_index = cursor.getColumnIndexOrThrow(MediaStore.Audio.Media.DATA);
cursor.moveToFirst();
return cursor.getString(column_index);
}
/**
* Convenience function to change UI state based on being logged in
*/
private void setLoggedIn(boolean loggedIn) {
mLoggedIn = loggedIn;
if (loggedIn) {
mSubmit.setText("Logout from Dropbox");
mDisplay.setVisibility(View.VISIBLE);
} else {
mSubmit.setText("Login with Dropbox");
mDisplay.setVisibility(View.GONE);
mImage.setImageDrawable(null);
}
}
private void checkAppKeySetup() {
// Check to make sure that we have a valid app key
if (APP_KEY.startsWith("CHANGE") || APP_SECRET.startsWith("CHANGE")) {
showToast("You must apply for an app key and secret from developers.dropbox.com, and add them to the DBRoulette ap before trying it.");
finish();
return;
}
// Check if the app has set up its manifest properly.
Intent testIntent = new Intent(Intent.ACTION_VIEW);
String scheme = "db-" + APP_KEY;
String uri = scheme + "://" + AuthActivity.AUTH_VERSION + "/test";
testIntent.setData(Uri.parse(uri));
PackageManager pm = getPackageManager();
if (0 == pm.queryIntentActivities(testIntent, 0).size()) {
showToast("URL scheme in your app's "
+ "manifest is not set up correctly. You should have a "
+ "com.dropbox.client2.android.AuthActivity with the "
+ "scheme: " + scheme);
finish();
}
}
private void showToast(String msg) {
Toast error = Toast.makeText(this, msg, Toast.LENGTH_LONG);
error.show();
}
/**
* Shows keeping the access keys returned from Trusted Authenticator in a
* local store, rather than storing user name & password, and
* re-authenticating each time (which is not to be done, ever).
*/
private void loadAuth(AndroidAuthSession session) {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME, 0);
String key = prefs.getString(ACCESS_KEY_NAME, null);
String secret = prefs.getString(ACCESS_SECRET_NAME, null);
if (key == null || secret == null || key.length() == 0
|| secret.length() == 0)
return;
if (key.equals("oauth2:")) {
// If the key is set to "oauth2:", then we can assume the token is
// for OAuth 2.
session.setOAuth2AccessToken(secret);
} else {
// Still support using old OAuth 1 tokens.
session.setAccessTokenPair(new AccessTokenPair(key, secret));
}
}
/**
* Shows keeping the access keys returned from Trusted Authenticator in a
* local store, rather than storing user name & password, and
* re-authenticating each time (which is not to be done, ever).
*/
private void storeAuth(AndroidAuthSession session) {
// Store the OAuth 2 access token, if there is one.
String oauth2AccessToken = session.getOAuth2AccessToken();
if (oauth2AccessToken != null) {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME,
0);
Editor edit = prefs.edit();
edit.putString(ACCESS_KEY_NAME, "oauth2:");
edit.putString(ACCESS_SECRET_NAME, oauth2AccessToken);
edit.commit();
return;
}
// Store the OAuth 1 access token, if there is one. This is only
// necessary if
// you're still using OAuth 1.
AccessTokenPair oauth1AccessToken = session.getAccessTokenPair();
if (oauth1AccessToken != null) {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME,
0);
Editor edit = prefs.edit();
edit.putString(ACCESS_KEY_NAME, oauth1AccessToken.key);
edit.putString(ACCESS_SECRET_NAME, oauth1AccessToken.secret);
edit.commit();
return;
}
}
private void clearKeys() {
SharedPreferences prefs = getSharedPreferences(ACCOUNT_PREFS_NAME, 0);
Editor edit = prefs.edit();
edit.clear();
edit.commit();
}
private AndroidAuthSession buildSession() {
AppKeyPair appKeyPair = new AppKeyPair(APP_KEY, APP_SECRET);
AndroidAuthSession session = new AndroidAuthSession(appKeyPair);
loadAuth(session);
return session;
}
}
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