要实现安卓无需用户交互发送Gmail的功能,可以使用Android的Gmail API。下面是一个使用Java语言的示例代码:
首先,在AndroidManifest.xml文件中添加以下权限和服务声明:
接下来,创建一个名为GmailSender的类,用于发送Gmail消息:
import android.accounts.Account;
import android.accounts.AccountManager;
import android.content.Context;
import android.os.AsyncTask;
import android.util.Log;
import com.google.api.client.extensions.android.http.AndroidHttp;
import com.google.api.client.googleapis.auth.oauth2.GoogleCredential;
import com.google.api.client.googleapis.extensions.android.gms.auth.GoogleAccountCredential;
import com.google.api.client.googleapis.json.GoogleJsonResponseException;
import com.google.api.client.googleapis.services.AbstractGoogleClientRequest;
import com.google.api.client.googleapis.services.CommonGoogleClientRequestInitializer;
import com.google.api.client.googleapis.services.json.AbstractGoogleJsonClient;
import com.google.api.client.googleapis.services.json.AbstractGoogleJsonClient.Builder;
import com.google.api.client.http.HttpRequestInitializer;
import com.google.api.client.json.JsonFactory;
import com.google.api.client.json.jackson2.JacksonFactory;
import com.google.api.services.gmail.Gmail;
import com.google.api.services.gmail.GmailScopes;
import com.google.api.services.gmail.model.Message;
import com.google.api.services.gmail.model.MessagePart;
import com.google.api.services.gmail.model.ModifyMessageRequest;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.util.Collections;
import java.util.List;
public class GmailSender {
private static final String TAG = "GmailSender";
private static final String APPLICATION_NAME = "Your Application Name";
private static final String SCOPES = GmailScopes.GMAIL_SEND;
private static final String USER_ID = "me";
private Context context;
private Gmail gmailService;
public GmailSender(Context context) {
this.context = context;
this.gmailService = buildGmailService();
}
private Gmail buildGmailService() {
GoogleAccountCredential credential = GoogleAccountCredential.usingOAuth2(
context, Collections.singleton(SCOPES))
.setSelectedAccount(getGoogleAccount());
HttpRequestInitializer requestInitializer = new CommonGoogleClientRequestInitializer() {
@Override
protected void initialize(AbstractGoogleClientRequest> request) throws IOException {
super.initialize(request);
request.setDisableGZipContent(true);
}
};
Builder builder = new Builder(
AndroidHttp.newCompatibleTransport(),
new JacksonFactory(),
credential)
.setHttpRequestInitializer(requestInitializer)
.setApplicationName(APPLICATION_NAME);
return builder.build();
}
private String getGoogleAccount() {
Account[] accounts = AccountManager.get(context).getAccountsByType("com.google");
if (accounts.length > 0) {
return accounts[0].name;
}
return null;
}
public void sendEmail(String recipient, String subject, String body) {
new SendEmailTask(recipient, subject, body).execute();
}
private class SendEmailTask extends AsyncTask {
private String recipient;
private String subject;
private String body;
public SendEmailTask(String recipient, String subject, String body) {
this.recipient = recipient;
this.subject = subject;
this.body = body;
}
@Override
protected Void doInBackground(Void... params) {
try {
Message message = createMessageWithEmail(createEmail(recipient, subject, body));
gmailService.users().messages().send(USER_ID, message).execute();
Log.d(TAG, "Email sent successfully");
} catch (IOException e) {
Log.e(TAG, "Failed to send email", e);
}
return null;
}
private Message createMessageWithEmail(Message emailContent) throws IOException {
ByteArrayOutputStream buffer = new ByteArrayOutputStream();
emailContent.encode(buffer);
byte[] bytes = buffer.toByteArray();
String encodedEmail = android.util.Base64.encodeToString(bytes, android.util.Base64.URL_SAFE);
Message message = new Message();
message.setRaw(encodedEmail);
return message;
}
private Message create
上一篇:安卓 - 位置权限 - 弹窗响应
下一篇:安卓 - 希伯来文显示错误