我正在尝试将用户从其Google云端硬盘中选择的图片发送到其他功能。我想检索用户选择的内容，并将照片uri或该照片的位图发送到功能。任何人都可以帮助我吗？
这是我的代码：
import android.app.Activity;
import android.content.Intent;
import android.content.IntentSender;
import android.net.Uri;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GoogleApiAvailability;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.common.api.PendingResult;
import com.google.android.gms.common.api.ResultCallback;
import com.google.android.gms.drive.Drive;
import com.google.android.gms.drive.DriveApi;
import com.google.android.gms.drive.DriveContents;
import com.google.android.gms.drive.DriveFile;
import com.google.android.gms.drive.DriveFolder;
import com.google.android.gms.drive.DriveId;
import com.google.android.gms.drive.MetadataChangeSet;
import com.google.android.gms.drive.OpenFileActivityBuilder;
import java.io.IOException;
import java.io.OutputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
public class MainActivity extends Activity implements GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener {
private static final String TAG = "Google Drive Activity";
private static final int REQUEST_CODE_RESOLUTION = 1;
private static final int REQUEST_CODE_OPENER = 2;
private GoogleApiClient mGoogleApiClient;
private boolean fileOperation = false;
private DriveId mFileId;
public DriveFile file;
@Override
protected void onCreate(Bundle savedInstanceState) {
Log.i(TAG, "Inside the onCreate Method");
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
/**
* Called when the activity will start interacting with the user.
* At this point your activity is at the top of the activity stack,
* with user input going to it.
*/
@Override
protected void onResume() {
super.onResume();
Log.i(TAG, "Inside the onResume method");
if (mGoogleApiClient == null) {
/**
* Create the API client and bind it to an instance variable.
* We use this instance as the callback for connection and connection failures.
* Since no account name is passed, the user is prompted to choose.
*/
Log.i(TAG, "Creating the API client");
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Drive.API)
.addScope(Drive.SCOPE_FILE)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.build();
}
Log.i(TAG,"About to call connect method().");
mGoogleApiClient.connect();
}
@Override
protected void onStop() {
super.onStop();
Log.i(TAG,"inside the onStop method");
if (mGoogleApiClient != null) {
// disconnect Google API client connection
mGoogleApiClient.disconnect();
}
super.onPause();
}
@Override
public void onConnectionFailed(ConnectionResult result) {
Log.i(TAG, "Inside onConnectionFailed()");
// Called whenever the API client fails to connect.
Log.i(TAG, "GoogleApiClient connection failed: " + result.toString());
if (!result.hasResolution()) {
// show the localized error dialog.
GoogleApiAvailability.getInstance().getErrorDialog(this, result.getErrorCode(), 0).show();
return;
}
/**
* The failure has a resolution. Resolve it.
* Called typically when the app is not yet authorized, and an authorization
* dialog is displayed to the user.
*/
try {
result.startResolutionForResult(this, REQUEST_CODE_RESOLUTION);
} catch (IntentSender.SendIntentException e) {
Log.e(TAG, "Exception while starting resolution activity", e);
}
}
/**
* It invoked when Google API client connected
* @param connectionHint
*/
@Override
public void onConnected(Bundle connectionHint) {
Log.i(TAG, "Inside onConnected Method()");
Toast.makeText(getApplicationContext(), "Connected", Toast.LENGTH_LONG).show();
}
/**
* It invoked when connection suspend
* @param cause
*/
@Override
public void onConnectionSuspended(int cause) {
Log.i(TAG, "GoogleApiClient connection suspended");
}
public void onClickCreateFile(View view){
fileOperation = true;
// create new contents resource
Drive.DriveApi.newDriveContents(mGoogleApiClient)
.setResultCallback(driveContentsCallback);
}
public void onClickOpenFile(View view){
fileOperation = false;
Log.i(TAG, "Selected the onClickOpenFile button");
// create new contents resource
Drive.DriveApi.newDriveContents(mGoogleApiClient)
.setResultCallback(driveContentsCallback);
}
/**
* Open list of folder and file of the Google Drive
*/
public void OpenFileFromGoogleDrive(){
Log.i(TAG, "Inside OpenFIleFromGoogleDrive method.");
IntentSender intentSender = Drive.DriveApi
.newOpenFileActivityBuilder()
//Restricting the user to only select txt and image support files for Tesseract.
.setMimeType(new String[] { "text/plain", "image/png", "image/jpeg", "image/bmp", "jpg" })
.build(mGoogleApiClient);
try {
startIntentSenderForResult(
intentSender, REQUEST_CODE_OPENER, null, 0, 0, 0);
} catch (IntentSender.SendIntentException e) {
Log.w(TAG, "Unable to send intent", e);
}
}
/**
* This is Result result handler of Drive contents.
* this callback method call CreateFileOnGoogleDrive() method
* and also call OpenFileFromGoogleDrive() method,
* send intent onActivityResult() method to handle result.
*/
final ResultCallback<DriveApi.DriveContentsResult> driveContentsCallback =
new ResultCallback<DriveApi.DriveContentsResult>() {
@Override
public void onResult(DriveApi.DriveContentsResult result) {
Log.i(TAG, "Inside onResultCallback()");
if (result.getStatus().isSuccess()) {
if (fileOperation == true) {
CreateFileOnGoogleDrive(result);
} else {
OpenFileFromGoogleDrive();
}
}
}
};
/**
* Create a file in root folder using MetadataChangeSet object.
* @param result
*/
public void CreateFileOnGoogleDrive(DriveApi.DriveContentsResult result){
Log.i(TAG, "Inside createfileongoogledrive method");
final DriveContents driveContents = result.getDriveContents();
// Perform I/O off the UI thread.
new Thread() {
@Override
public void run() {
// write content to DriveContents
OutputStream outputStream = driveContents.getOutputStream();
Writer writer = new OutputStreamWriter(outputStream);
try {
writer.write("Hello Joseph, you created me(: !");
writer.close();
} catch (IOException e) {
Log.e(TAG, e.getMessage());
}
MetadataChangeSet changeSet = new MetadataChangeSet.Builder()
.setTitle("test2")
.setMimeType("text/plain")
.setStarred(true).build();
// create a file in root folder
Drive.DriveApi.getRootFolder(mGoogleApiClient)
.createFile(mGoogleApiClient, changeSet, driveContents)
.setResultCallback(fileCallback);
}
}.start();
}
/**
* Handle result of Created file
*/
final private ResultCallback<DriveFolder.DriveFileResult> fileCallback = new
ResultCallback<DriveFolder.DriveFileResult>() {
@Override
public void onResult(DriveFolder.DriveFileResult result) {
if (result.getStatus().isSuccess()) {
Toast.makeText(getApplicationContext(), "file created: "+""+
result.getDriveFile().getDriveId(), Toast.LENGTH_LONG).show();
}
return;
}
};
/**
* Handle Response of selected file
* @param requestCode
* @param resultCode
* @param data
*/
@Override
protected void onActivityResult(final int requestCode,
final int resultCode, final Intent data) {
switch (requestCode) {
case REQUEST_CODE_OPENER:
if (resultCode == RESULT_OK) {
mFileId = (DriveId) data.getParcelableExtra(
OpenFileActivityBuilder.EXTRA_RESPONSE_DRIVE_ID);
Log.e("file id", mFileId.getResourceId() + "");
String url = "https://drive.google.com/open?id="+ mFileId.getResourceId();
Intent i = new Intent(Intent.ACTION_VIEW);
i.setData(Uri.parse(url));
startActivity(i);
}
break;
default:
super.onActivityResult(requestCode, resultCode, data);
break;
}
}
}