java - 尝试发送电子邮件时出现错误

Question

我的代码是...

public class AndroidEmailActivity extends Activity {

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        final EditText edittextEmailAddress = (EditText) findViewById(R.id.email_address);
        final EditText edittextEmailSubject = (EditText) findViewById(R.id.email_subject);
        final EditText edittextEmailText = (EditText) findViewById(R.id.email_text);
        Button buttonSendEmail_intent = (Button) findViewById(R.id.sendemail_intent);

        buttonSendEmail_intent.setOnClickListener(new Button.OnClickListener() {

            @Override
            public void onClick(View arg0) {
                // TODO Auto-generated method stub

                String emailAddress = edittextEmailAddress.getText().toString();
                String emailSubject = edittextEmailSubject.getText().toString();
                String emailText = edittextEmailText.getText().toString();

                String emailAddressList[] = { emailAddress };

                Intent intent = new Intent(Intent.ACTION_SEND);
                intent.setType("plain/text");
                intent.putExtra(Intent.EXTRA_EMAIL, emailAddressList);
                intent.putExtra(Intent.EXTRA_SUBJECT, emailSubject);
                intent.putExtra(Intent.EXTRA_TEXT, emailText);
                startActivity(Intent.createChooser(intent,
                        "Choice App t send email:"));

            }
        });
    }
}

我在控制台窗口中收到错误

[2011-10-18 12:43:54 - AndroidEmail] Re-installation failed due to different application signatures.
[2011-10-18 12:43:54 - AndroidEmail] You must perform a full uninstall of the application. WARNING: This will remove the application data!
[2011-10-18 12:43:54 - AndroidEmail] Please execute 'adb uninstall com.android.email' in a shell.
[2011-10-18 12:43:54 - AndroidEmail] Launch canceled!

Answer 1

我认为发生此错误的原因是，应用程序已从另一台计算机安装在设备中。要解决此问题，您首先需要卸载该应用程序，然后尝试安装新的应用程序。