java - 将多个 Intent 用于不同的 Activity 和最终的电子邮件 Intent

Question

我正在制作一个表单应用程序，用于收集信息并通过电子邮件发送。 MainActivity 收集电话号码，然后是警告消息 Activity ，然后是名称 Activity 等。我遇到的问题是将从 EditText 字段收集的数据发送到最终 AgreementActivity 以作为电子邮件发送，这对我来说不起作用。我到处都看过，但我无法弄清楚如何在将输入数据发送到最终协议(protocol) Activity 时将用户发送到下一个 Activity ，以便可以通过电子邮件发送。

这就是我目前所拥有的。

 public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);



    // Find the next button
    final Button next1 = (Button) findViewById(R.id.button);

    // Find the Edit Text Field to input Phone Number
    final EditText phoneField = (EditText) findViewById(R.id.edit_text_phone);

    // Set a click listener on the next button
    next1.setOnClickListener(new View.OnClickListener() {
        // The code in this method will be executed when the next1 Button is clicked on.
        @Override
        public void onClick(View view) {

            // sends data collected from edit text box to be sent to final page so it can be
            // sent in an email message.

            Intent phoneNumber = new Intent(MainActivity.this, AgreementActivity.class);
            phoneNumber.putExtra("phoneMessage", phoneField.getText().toString());
            startActivity(phoneNumber);

            //starts next activity
            Intent nextButton = new Intent(MainActivity.this, Warning.class);
            startActivity(nextButton);
        }
    });

}

这是发送电子邮件的最终协议(protocol) Activity 。但是邮件主题行的最终结果是“您的电话号码为空”

public class AgreementActivity extends AppCompatActivity {
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.agreement_activity);


    // Find the submit button
    final Button submit = (Button) findViewById(R.id.button6);


    // This is the input from user for phone number field
    final Bundle phoneNumber = getIntent().getExtras();



    // Set a click listener on that View
    submit.setOnClickListener(new View.OnClickListener() {
        // The code in this method will be executed when the Submit Button is clicked on.
        @Override
        public void onClick(View view) {



            Intent intent = new Intent(Intent.ACTION_SENDTO);
            intent.setData(Uri.parse("mailto:"));
            intent.getBundleExtra("phoneMessage");
            intent.putExtra(Intent.EXTRA_SUBJECT, "Your Phone Number is " + phoneNumber);

            if (intent.resolveActivity(getPackageManager()) != null) {
                startActivity(intent);
            }


        }


    });
}

Answer 1

在您的 AgreementActivity 中，使用以下方法获取电话号码:

final String phoneNumber = getIntent().getStringExtra("phoneMessage");