android 打电话 发送短信

1.XML布局

2.MainActivity

package com.example.Android013;
import androidx.appcompat.app.AppCompatActivity;
import android.annotation.SuppressLint;
import android.app.PendingIntent;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.telephony.SmsManager;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;
public class MainActivity extends AppCompatActivity implements View.OnClickListener {
    private Button call;
    private Button send_sms;
    private Button send_sms_noApp;
    private EditText phoneNumber;
    private EditText message;
    private String Phone;  //定义字符
    private String msg;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        call=findViewById(R.id.call);
        send_sms=findViewById(R.id.send_sms);
        send_sms_noApp=findViewById(R.id.send_sms_noApp);
        phoneNumber=findViewById(R.id.phoneNumber);
        message=findViewById(R.id.message);
        call.setOnClickListener(this);
        send_sms.setOnClickListener(this);
        send_sms_noApp.setOnClickListener(this);
    }
    @SuppressLint("WronGConstant")
    @Override
    public void onClick(View v) {
        switch (v.getId()){
            case R.id.call:
                //意图
                Intent li=new Intent();
                //设置动作
                li.setAction(Intent.ACTION_DIAL); //拨打
                //给谁打电话
                Phone=phoneNumber.getText().toString();
                li.setData(Uri.parse("tel:"+Phone));
                //启动意图
                startActivity(li);
                break;
            case R.id.send_sms:
                //意图
                Intent li1=new Intent();
               //获取电话
                Phone=phoneNumber.getText().toString();
                //获取短信
                msg=message.getText().toString();
                //设置动作
                li1.setAction(Intent.ACTION_SENDTO);//发送到哪里
                li1.setData(Uri.parse("smsto:"+Phone));  //发送到谁
                //发送内容 键值对出现
                li1.putExtra("sms_body",msg);  //一条短信只能容纳140个字节70个汉字.判断长度
                //启动意图
                startActivity(li1);
                break;
            case R.id.send_sms_noApp:  //自己发送,不启动系统自带的APP
                //短信管理者
                SmsManager manager=SmsManager.getDefault();
                //意图
                PendingIntent pendingIntent=PendingIntent.getBroadcast(MainActivity.this,0,new Intent(),0);
                manager.sendTextMessage("12306",null,"回家正好啊",pendingIntent,null);
                Toast.makeText(this,"发送成功",0).show();
                break;
        }
    }
}

AndroidManifest.xml
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