Android implements the function of sending text messages

renderings

Code

Add permissions first

	<!-- 允许程序发送SMS短信 -->
    <uses-permission android:name="android.permission.SEND_SMS"></uses-permission>

    <!-- 允许程序读取短信息 -->
    <uses-permission android:name="android.permission.READ_SMS"></uses-permission>

    <!-- 允许程序监控一个将收到短信息，记录或处理 -->
    <uses-permission android:name="android.permission.RECEIVE_SMS"></uses-permission>

.java

Customize text message content by user inputting mobile phone number

	/**
     * 由用户输入手机号
     * @param message：短信内容
     */
    private void send(String message) {
    
    
        Intent sendIntent = new Intent(Intent.ACTION_VIEW);
        sendIntent.putExtra("sms_body", message);
        sendIntent.setType("vnd.android-dir/mms-sms");
        startActivity(sendIntent);
    }

Jump to the system to send SMS page to customize the text message content of mobile phone number

	/**
     * 跳转系统发送短信页面
     *
     * @param phone：手机号
     * @param message：短信内容
     */
    private void sendSms(String phone, String message) {
    
    
        Uri uri = Uri.parse("smsto:" + phone);
        Intent sendIntent = new Intent(Intent.ACTION_VIEW, uri);
        sendIntent.putExtra("sms_body", message);
        startActivity(sendIntent);
    }

All code

package top.gaojc.sendsmsdemo;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.widget.Button;

public class MainActivity extends AppCompatActivity {
    
    

    private Button btSendSms;
    private final String PHONE = "173011201164";
    private final String MESSAGE = "你好";

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

        btSendSms = findViewById(R.id.bt_send_sms);

        btSendSms.setOnClickListener(v -> {
    
    
            send(MESSAGE);
        });
    }

    /**
     * 由用户输入手机号
     * @param message：短信内容
     */
    private void send(String message) {
    
    
        Intent sendIntent = new Intent(Intent.ACTION_VIEW);
        sendIntent.putExtra("sms_body", message);
        sendIntent.setType("vnd.android-dir/mms-sms");
        startActivity(sendIntent);
    }

    /**
     * 跳转系统发送短信页面
     *
     * @param phone：手机号
     * @param message：短信内容
     */
    private void sendSms(String phone, String message) {
    
    
        Uri uri = Uri.parse("smsto:" + phone);
        Intent sendIntent = new Intent(Intent.ACTION_VIEW, uri);
        sendIntent.putExtra("sms_body", message);
        startActivity(sendIntent);
    }

}

.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <Button
        android:id="@+id/bt_send_sms"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="发送短信"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>