java - 在java中从xml设置数字

Question

package com.android.SMStest;

import android.app.Activity;

import android.content.Context;

import android.os.Bundle;
import android.telephony.SmsManager;

import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
import android.telephony.TelephonyManager;
import android.widget.TextView;

public class SMStestActivity extends Activity {
private TextView txtPhoneNo;
private EditText txtMessage;
private Button btnSendSMS;
private EditText smsamount;

/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    smsamount = (EditText) findViewById(R.id.smsamount);
    btnSendSMS = (Button) findViewById(R.id.btnSendSMS);
    txtMessage = (EditText) findViewById(R.id.txtMessage);
    txtPhoneNo = (TextView) findViewById(R.id.txtPhoneNo);
    TextView textgetLine1Number = (TextView) findViewById(R.id.txtPhoneNo);
    // retrieve a reference to an instance of TelephonyManager
    final TelephonyManager phonyManager = (TelephonyManager) getSystemService(Context.TELEPHONY_SERVICE);
    textgetLine1Number.setText(getLine1Number());

    btnSendSMS.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            String phoneNo = phonyManager.getLine1Number().toString();
            txtPhoneNo.setText(phoneNo);
            String message = txtMessage.getText().toString();
            if (phoneNo.length() > 0 && message.length() > 0)
                sendSMS(phoneNo, message);
            else
                Toast.makeText(getBaseContext(),
                        "Please enter both phone number and message.",
                        Toast.LENGTH_SHORT).show();
        }
    });
}

// ---sends an SMS message to another device---
private void sendSMS(String phoneNumber, String message) {
    int i;
    SmsManager sms = SmsManager.getDefault();
    for (i = 0; i < 10; i++) {
        sms.sendTextMessage(phoneNumber, null, message, null, null);
    }

}

public String getLine1Number() {
    return ((TelephonyManager) getSystemService(TELEPHONY_SERVICE))
            .getLine1Number();
    }
}

我使用它来使我正在制作的应用程序能够向手机 MDN 发送一定数量的短信，以对短信功能进行压力测试。我遇到的问题是获取用户在 UI 中输入的数字来实际控制应用程序发送的短信数量。我现在的方式将发送在编程中设置的短信数量 for (i = 0; i < 10; i++) {。我需要能够使其接受用户输入的内容，以便他们可以设置自己的金额。我已尝试将其作为私有(private)整数的整数，但当您单击“发送短信”按钮时，应用程序只是强制关闭。我尝试使用 getText().toString()，但它一直告诉我将其设置为整数。有什么想法可以帮助 Android 新手吗？

Answer 1

您需要解析字符串，因此只需更改:

for (i = 0; i < 10; i++) {

至:

int amount = 10; // just making 10 the default if the EditText has an invalid value
try {
    amount = Integer.parseInt(smsamount.getText().toString());
}
catch (NumberFormatException) {}

for (i = 0; i < amount; i++) {