Android实现短信加密功能（发送加密短信、解密本地短信）

import android.app.Activity; import android.content.Intent; import android.support.v7.app.AppCompatActivity; import android.os.Bundle; import android.view.View; import android.widget.Button;  public class MainActivity extends Activity {   @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_main);   InitView();  }   private void InitView() {  Button send=(Button)findViewById(R.id.bt_send);  Button receive=(Button)findViewById(R.id.bt_receive);   send.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View view) {   Intent intent=new Intent(MainActivity.this,SendActivity.class);   startActivity(intent);   }  });   receive.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View view) {   Intent intent=new Intent(MainActivity.this,ReceiveActivity.class);   startActivity(intent);   }  });  } } 

import android.app.Activity; import android.app.PendingIntent; import android.content.BroadcastReceiver; import android.content.Context; import android.content.Intent; import android.content.IntentFilter; import android.os.Bundle; import android.telephony.SmsManager; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.EditText; import android.widget.Toast;  /**  * Created by 佳佳 on 2015/12/21.  */ public class SendActivity extends Activity {   private IntentFilter sendFilter;  private SendStatusReceiver sendStatusReceiver;   @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_send);   InitView();  }   private void InitView() {  Button cancel = (Button) findViewById(R.id.cancel_edit);  Button send = (Button) findViewById(R.id.send_edit);  final EditText phone = (EditText) findViewById(R.id.phone_edit_text);  final EditText msgInput = (EditText) findViewById(R.id.content_edit_text);   //为发送短信设置要监听的广播  sendFilter = new IntentFilter();  sendFilter.addAction("SENT_SMS_ACTION");  sendStatusReceiver = new SendStatusReceiver();  registerReceiver(sendStatusReceiver, sendFilter);   send.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View v) {   Toast.makeText(SendActivity.this, "加密发送中，请稍后...", Toast.LENGTH_SHORT).show();   //接收edittext中的内容,并且进行加密   //倘若char+8超出了表示范围，则把原字符发过去   String address = phone.getText().toString();   String content = msgInput.getText().toString();   String contents = "";   for (int i = 0; i < content.length(); i++) {    try {    contents += (char) (content.charAt(i) + 8);    }catch (Exception e) {    contents += (char) (content.charAt(i));    }   }    //Log.i("hahaha",contents);    //发送短信   //并使用sendTextMessage的第四个参数对短信的发送状态进行监控   SmsManager smsManager = SmsManager.getDefault();   Intent sentIntent = new Intent("SENT_SMS_ACTION");   PendingIntent pi = PendingIntent.getBroadcast(    SendActivity.this, 0, sentIntent, 0);   smsManager.sendTextMessage(address, null,    contents.toString(), pi, null);   }  });   cancel.setOnClickListener(new View.OnClickListener() {   @Override   public void onClick(View view) {   finish();   }  });  }   class SendStatusReceiver extends BroadcastReceiver {   @Override  public void onReceive(Context context, Intent intent) {   if (getResultCode() == RESULT_OK) {   //发送成功   Toast.makeText(context, "Send succeeded", Toast.LENGTH_LONG)    .show();    Intent intent1 = new Intent(SendActivity.this, ReceiveActivity.class);   startActivity(intent1);   finish();   } else {   //发送失败   Toast.makeText(context, "Send failed", Toast.LENGTH_LONG)    .show();   }  }   }   @Override  protected void onDestroy() {  super.onDestroy();  //在Activity摧毁的时候停止监听  unregisterReceiver(sendStatusReceiver);  } } 

import android.app.Activity; import android.content.Intent; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.util.Log; import android.view.View; import android.widget.AdapterView; import android.widget.ListView; import android.widget.SimpleAdapter; import android.widget.TextView;  import java.text.SimpleDateFormat; import java.util.ArrayList; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; public class ReceiveActivity extends Activity implements AdapterView.OnItemClickListener{  private TextView Tv_address;  private TextView Tv_body;  private TextView Tv_time;  private ListView listview;  private List<Map<String, Object>> dataList;  private SimpleAdapter simple_adapter;   @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_receive);   InitView();  }   @Override  protected void onStart() {  super.onStart();  RefreshList();  }    private void InitView() {  Tv_address = (TextView) findViewById(R.id.tv_address);  Tv_body = (TextView) findViewById(R.id.tv_body);  Tv_time = (TextView) findViewById(R.id.tv_time);  listview = (ListView) findViewById(R.id.list_receive);  dataList = new ArrayList<Map<String, Object>>();   listview.setOnItemClickListener(this);  }   private void RefreshList() {  //从短信数据库读取信息  Uri uri = Uri.parse("content://sms/");  String[] projection = new String[]{"address", "body", "date"};  Cursor cursor = getContentResolver().query(uri, projection, null, null, "date desc");  startManagingCursor(cursor);   //此处为了简化代码提高效率，仅仅显示20条最近短信  for (int i = 0; i < 20; i++) {   //从手机短信数据库获取信息   if(cursor.moveToNext()) {   String address = cursor.getString(cursor.getColumnIndex("address"));   String body = cursor.getString(cursor.getColumnIndex("body"));   long longDate = cursor.getLong(cursor.getColumnIndex("date"));   //将获取到的时间转换为我们想要的方式   SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd hh:mm:ss");   Date d = new Date(longDate);   String time = dateFormat.format(d);     Map<String, Object> map = new HashMap<String, Object>();   map.put("address", address);   map.put("body", body+"body");   map.put("time", time+" time");   dataList.add(map);   }  }   simple_adapter = new SimpleAdapter(this, dataList, R.layout.activity_receive_list_item,   new String[]{"address", "body", "time"}, new int[]{   R.id.tv_address, R.id.tv_body, R.id.tv_time});  listview.setAdapter(simple_adapter);  }   @Override  public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {  //获取listview中此个item中的内容  //content的内容格式如下  //{body=[B@43c2da70body, address=+8615671562394address, time=2015-12-24 11:55:50time}  String content = listview.getItemAtPosition(i) + "";  String body = content.substring(content.indexOf("body=") + 5,   content.indexOf("body,"));  //Log.i("hahaha",body);  String address = content.substring(content.indexOf("address=") + 8,   content.lastIndexOf(","));  //Log.i("hahaha",address);  String time = content.substring(content.indexOf("time=") + 5,   content.indexOf(" time}"));  //Log.i("hahaha",time);   //使用bundle存储数据发送给下一个Activity  Intent intent=new Intent(ReceiveActivity.this,ReceiveActivity_show.class);  Bundle bundle = new Bundle();  bundle.putString("body", body);  bundle.putString("address", address);  bundle.putString("time", time);  intent.putExtras(bundle);  startActivity(intent);   } } 

import android.app.Activity; import android.os.Bundle; import android.widget.TextView;  public class ReceiveActivity_show extends Activity {  private TextView Address_show;  private TextView Time_show;  private TextView Early_body_show;  private TextView Late_body_show;   @Override  protected void onCreate(Bundle savedInstanceState) {  super.onCreate(savedInstanceState);  setContentView(R.layout.activity_receive_show);   InitView();  }   private void InitView() {   Address_show = (TextView) findViewById(R.id.address_show);  Time_show = (TextView) findViewById(R.id.time_show);  Early_body_show = (TextView) findViewById(R.id.early_body_show);  Late_body_show = (TextView) findViewById(R.id.late_body_show);   //接收内容和id  Bundle bundle = this.getIntent().getExtras();  String body = bundle.getString("body");  String time = bundle.getString("time");  String address = bundle.getString("address");    Address_show.setText(address);  Early_body_show.setText(body);  Time_show.setText(time);   //对短信消息进行解密后显示在textview中  //倘若char+8超出了表示范围，则直接按照原字符解析  String real_content = "";  for (int i = 0; i < body.length(); i++) {   try {   char textchar=(char) (body.charAt(i) + 8);   real_content += (char) (body.charAt(i) - 8);   }catch (Exception e){   real_content += (char) (body.charAt(i));   }  }  Late_body_show.setText(real_content);  }  } 

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical">   <TextView  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:background="#000"  android:padding="12dp"  android:text="加密短信"  android:textColor="#fff"  android:textSize="25sp"  android:textStyle="bold" />  <Button  android:layout_marginTop="120dp"  android:id="@+id/bt_send"  android:layout_width="200dp"  android:layout_height="80dp"  android:text="发送加密短信"  android:layout_gravity="center"  android:textSize="20dp"/>  <Button  android:id="@+id/bt_receive"  android:layout_width="200dp"  android:layout_height="80dp"  android:layout_gravity="center"  android:text="解密本地短信"  android:textSize="20dp"  android:layout_below="@+id/bt_send"/>  </LinearLayout> 

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical">    <LinearLayout  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  android:padding="10dp">   <TextView   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:text="加密短信发送"   android:textColor="#000"   android:textSize="35sp" />   <View   android:layout_width="match_parent"   android:layout_height="3dp"   android:layout_marginBottom="20dp"   android:background="#CECECE" />   <TextView   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:layout_marginBottom="5dp"   android:text="发送至："   android:textSize="25sp" />   <EditText   android:id="@+id/phone_edit_text"   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:layout_marginBottom="10dp"   android:background="@drawable/edit_text_style"   android:hint="接收人手机号码"   android:maxLength="15"   android:maxLines="1"   android:textSize="19sp"   android:singleLine="true" />   <TextView   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:layout_marginBottom="5dp"   android:text="发送内容"   android:textSize="25sp" />   <EditText   android:id="@+id/content_edit_text"   android:layout_width="match_parent"   android:layout_height="0dp"   android:layout_weight="1"   android:background="@drawable/edit_text_style"   android:gravity="start"   android:hint="单条短信请保持在70字以内"   android:maxLength="70"   android:textSize="19sp"   />   <LinearLayout   android:layout_width="match_parent"   android:layout_height="wrap_content"   android:layout_margin="10dp">    <Button   android:id="@+id/cancel_edit"   android:layout_width="0dp"   android:layout_height="wrap_content"   android:layout_weight="1"   android:text="取消编辑"   android:textSize="20sp" />    <Button   android:id="@+id/send_edit"   android:layout_width="0dp"   android:layout_height="wrap_content"   android:layout_weight="1"   android:text="发 送"   android:textSize="20sp" />  </LinearLayout>  </LinearLayout> </LinearLayout> 

<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:orientation="vertical" android:layout_width="match_parent"  android:layout_height="match_parent">   <TextView  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:padding="10dp"  android:text="所有短信"  android:textColor="#fff"  android:background="#000"  android:textSize="23sp"  android:textStyle="bold"/>   <ListView  android:id="@+id/list_receive"  android:layout_width="match_parent"  android:layout_height="match_parent"></ListView>  </LinearLayout> 

<?xml version="1.0" encoding="utf-8"?>  <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical">   <TextView  android:layout_width="match_parent"  android:layout_height="wrap_content"  android:background="#000"  android:padding="12dp"  android:text="短信解密"  android:textColor="#fff"  android:textSize="25sp"  android:textStyle="bold" />   <TableLayout  android:layout_width="match_parent"  android:layout_height="match_parent"  android:orientation="vertical"  android:padding="10dp"  android:stretchColumns="1"  android:shrinkColumns="1">   <TableRow android:layout_marginTop="10dp"   android:layout_width="match_parent"   >    <TextView   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginBottom="5dp"   android:text="号码："   android:textColor="#000"   android:textSize="20sp" />    <TextView   android:id="@+id/address_show"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginBottom="10dp"   android:background="@drawable/edit_text_style"   android:maxLines="1"   android:singleLine="true"   android:textSize="18sp" />  </TableRow   >   <TableRow   android:layout_width="match_parent"   android:layout_marginBottom="10dp"   >    <TextView   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginBottom="5dp"   android:text="时间："   android:textColor="#000"   android:textSize="20sp" />    <TextView   android:id="@+id/time_show"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginBottom="10dp"   android:background="@drawable/edit_text_style"   android:maxLines="1"   android:textSize="18sp" />  </TableRow>   <TableRow android:layout_marginBottom="10dp"   android:layout_width="match_parent">    <TextView   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginBottom="5dp"   android:text="原文本："   android:textColor="#000"   android:textSize="20sp" />    <TextView   android:id="@+id/early_body_show"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:background="@drawable/edit_text_style"   android:minLines="6"   android:maxLines="6"   android:textSize="18sp"   />  </TableRow>   <TableRow   android:layout_width="match_parent">    <TextView   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:layout_marginBottom="5dp"   android:text="解析后："   android:textColor="#000"   android:textSize="20sp" />    <TextView   android:id="@+id/late_body_show"   android:layout_width="wrap_content"   android:layout_height="wrap_content"   android:background="@drawable/edit_text_style"   android:minLines="6"   android:maxLines="6"   android:singleLine="false"   android:textSize="18sp"   />  </TableRow>    </TableLayout> </LinearLayout>