Android 6.0系统发短信（备忘）

package com.ymroom.smsmessage;

import android.Manifest;
import android.content.pm.PackageManager;
import android.os.Bundle;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v7.app.AppCompatActivity;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import java.util.ArrayList;

public class MainActivity extends AppCompatActivity {
    private EditText phoneNumText;
    private EditText contentText;
    private final static int My_CallPhone_Permission = 1;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        phoneNumText = (EditText) this.findViewById(R.id.phoneNum);
        contentText = (EditText) this.findViewById(R.id.smsContent);
        Button btn = (Button) this.findViewById(R.id.btnsend);
        btn.setOnClickListener(new BtnClickListener());

    }

    @Override
    public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
        if(requestCode==My_CallPhone_Permission){
            if(grantResults[0]==PackageManager.PERMISSION_GRANTED){
                SendMsg();
            }else{
                Toast.makeText(MainActivity.this,"授权失败",Toast.LENGTH_SHORT).show();
            }
            return;
        }
        super.onRequestPermissionsResult(requestCode, permissions, grantResults);
    }


    private  void SendMsg(){
        String phone = phoneNumText.getText().toString();
        String content = contentText.getText().toString();
        if (phone.trim().equals("")) {
            Toast.makeText(MainActivity.this, "号码不能为空", Toast.LENGTH_SHORT).show();
            return;
        }
        if (content.trim().equals("")) {
            Toast.makeText(MainActivity.this, "信息不能为空", Toast.LENGTH_SHORT).show();
            return;
        }
        SmsManager sms = SmsManager.getDefault();
        ArrayList<String> texts = sms.divideMessage(content);
        for (String text : texts) {
            sms.sendTextMessage(phone, null, text, null, null);
        }
        Toast.makeText(MainActivity.this, "发送完成", Toast.LENGTH_SHORT).show();
    }

    private final class BtnClickListener implements View.OnClickListener {

        @Override
        public void onClick(View view) {
            if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.SEND_SMS)!= PackageManager.PERMISSION_GRANTED)
            {
                ActivityCompat.requestPermissions(MainActivity.this,new String[]{Manifest.permission.SEND_SMS,Manifest.permission.READ_SMS},My_CallPhone_Permission);
            }
            else
            {
                SendMsg();
            }
        }
    }
}

和以前的低版本系统区别并不太大，主要是加了权限判断。