Android中实现短信发送的一种方式

package com.test.smsmangerdemo.sendsmsactivity;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import android.app.PendingIntent;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;




/**
 *发送短信实例
 */

public class SendSmsActivity extends AppCompatActivity {
    EditText phone, content;
    Button send;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_send_sms);
        //获取 SMSManger管理器
        final SmsManager smsManager = SmsManager.getDefault();
        //初始化控件
        phone = (EditText) findViewById(R.id.et_phone);
        content = (EditText) findViewById(R.id.et_content);
        send = (Button) findViewById(R.id.btn_send);

        send.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                //创建一个 android.app.PendingIntent 对象
                PendingIntent pi = PendingIntent.getActivity(SendSmsActivity.this, 0, new Intent(), 0);

                //发送短信
                smsManager.sendTextMessage(phone.getText().toString(), null, content.getText().toString(),
                        pi, null);

                //提示短信发送完成
                Toast.makeText(SendSmsActivity.this, "短信发送完成", Toast.LENGTH_SHORT).show();
            }
        });
    }
}
package com.t