短信发送器

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:context="com.example.wang.duanxin.MainActivity">

<TextView
android:id="@+id/tv_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="请输入手机号:" />
<EditText
android:id="@+id/et_number"
android:inputType="number"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:accessibilityTraversalBefore="@id/tv_number"/>
<TextView
android:id="@+id/tv_content"
android:layout_below="@+id/et_number"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:gravity="top"
android:text="请输入短信内容:" />

<EditText
android:id="@+id/et_content"
android:layout_width="match_parent"
android:layout_height="200px"
android:layout_below="@+id/tv_content"/>
<Button
android:id="@+id/btn_send"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_below="@+id/et_content"
android:text="发送短信"/>
</RelativeLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.wang.duanxin">
<uses-permission android:name="android.permission.SEND_SMS"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

package com.example.wang.duanxin;

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

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

private EditText etNumber;
private EditText etContent;

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

EditText etnumber=(EditText) findViewById(R.id.et_number);
EditText etContent = (EditText)findViewById(R.id.et_content);

Button button = (Button)findViewById(R.id.btn_send);
button.setOnClickListener(this);

}

@Override
public void onClick(View v) {
//号码
String number = etNumber.getText().toString();
//内容
String content = etNumber.getText().toString();

SmsManager smsManager=SmsManager.getDefault();
smsManager.sendTextMessage(
"10086",
null,
content,
null,
null
);

}
}