Android-監聽作業系統簡訊
想要訪問Android作業系統的ContentProvider就需要明白以下原理:
在Android作業系統裡面的 /packsges/目錄:
apps: 很多的系統應用,例如:聯絡人,瀏覽器,音樂播放器,設定,相機 ......
............
providers:系統對外暴露的ContentProvider:
這樣就明白了,Android作業系統裡面的應用(apps),是訪問系統對外暴露的ContentProvider(providers)
既然說Android作業系統裡面的應用(apps),是訪問系統對外暴露的ContentProvider(providers):
/data/data/com.android.mms(放置在apps目錄裡面)
/data/data/com.android.providers.telephony(放置在providers目錄裡面)
mms(簡訊應用) 是呼叫 providers.telephony(內容提供者裡面的資料),如圖:
簡訊應用沒有資料庫,那簡訊應用的資料是從哪裡來的 ?
答:簡訊應用是去 增刪改查了 com.android.providers.telephony 暴露簡訊資料的應用
apps:packages/apps/Mms Android檔案系統裡 /data/data/com.android.mms 簡訊應用
provider: packages/provider/ Android檔案系統裡 /data/data/com.android.providers.telephony 暴露簡訊資料的應用
閱讀packages/provider/TelephonyProvider/com.android.providers.telephony 暴露簡訊資料的應用 資料庫:
mmssms.db 資料庫 其他應用是沒有許可權訪問的,為什麼所有應用都能獲取到 packgeas/providers/....裡面到所有應用,因為這些應用通過ContentProvider對外暴露了
閱讀mmssms.db
開啟後:表非常多,等等, 但是隻需要關注一張核心的表,sms
關注的欄位:address:簡訊號碼, date:簡訊時間 ,body:簡訊內容
手機裡只有一條簡訊:
閱讀packages/provider/TelephonyProvider/com.android.providers.telephony AndroidManifest.xml
檢視AndroidManifest.xml provider節點:關注ContentProvider物件,授權,許可權 等;
SmsProvider:內容提供者
sms:授權,這授權真短
exported:對外輸出
READ_SMS/WRITE_SMS:訪問者必須要配置的許可權
<!-- This is a singleton provider that is used by all users. A new instance is not created for each user. And the db is shared as well. --> <provider android:name="SmsProvider" android:authorities="sms" android:multiprocess="false" android:exported="true" android:singleUser="true" android:readPermission="android.permission.READ_SMS" android:writePermission="android.permission.WRITE_SMS" />
閱讀packages/provider/TelephonyProvider/com.android.providers.telephony SmsProvider.java
首先要找到的就是Uri,所以搜尋UriMatcher的matcher.addURI
private static final UriMatcher sURLMatcher = new UriMatcher(UriMatcher.NO_MATCH); static { sURLMatcher.addURI("sms", null, SMS_ALL); sURLMatcher.addURI("sms", "#", SMS_ALL_ID); sURLMatcher.addURI("sms", "inbox", SMS_INBOX); sURLMatcher.addURI("sms", "inbox/#", SMS_INBOX_ID); sURLMatcher.addURI("sms", "sent", SMS_SENT); sURLMatcher.addURI("sms", "sent/#", SMS_SENT_ID); sURLMatcher.addURI("sms", "draft", SMS_DRAFT); sURLMatcher.addURI("sms", "draft/#", SMS_DRAFT_ID); sURLMatcher.addURI("sms", "outbox", SMS_OUTBOX); sURLMatcher.addURI("sms", "outbox/#", SMS_OUTBOX_ID); sURLMatcher.addURI("sms", "undelivered", SMS_UNDELIVERED); sURLMatcher.addURI("sms", "failed", SMS_FAILED); sURLMatcher.addURI("sms", "failed/#", SMS_FAILED_ID); sURLMatcher.addURI("sms", "queued", SMS_QUEUED); sURLMatcher.addURI("sms", "conversations", SMS_CONVERSATIONS); sURLMatcher.addURI("sms", "conversations/*", SMS_CONVERSATIONS_ID); sURLMatcher.addURI("sms", "raw", SMS_RAW_MESSAGE); sURLMatcher.addURI("sms", "attachments", SMS_ATTACHMENT); sURLMatcher.addURI("sms", "attachments/#", SMS_ATTACHMENT_ID); sURLMatcher.addURI("sms", "threadID", SMS_NEW_THREAD_ID); sURLMatcher.addURI("sms", "threadID/*", SMS_QUERY_THREAD_ID); sURLMatcher.addURI("sms", "status/#", SMS_STATUS_ID); sURLMatcher.addURI("sms", "sr_pending", SMS_STATUS_PENDING); sURLMatcher.addURI("sms", "icc", SMS_ALL_ICC); sURLMatcher.addURI("sms", "icc/#", SMS_ICC); //we keep these for not breaking old applications sURLMatcher.addURI("sms", "sim", SMS_ALL_ICC); sURLMatcher.addURI("sms", "sim/#", SMS_ICC);
sURLMatcher.addURI("sms", null, SMS_ALL); 就是全部簡訊內容的Uir,path等於null,這樣寫是可以的,代表全部的意思
在這原始碼中,一定有傳送改變通知的程式碼:
搜尋:.notifyChange
系統原始碼中 而且還另外兩條通知的uri
測試的應用:AndroidManifest.xml 配置許可權
<!-- 訪問作業系統簡訊內容提供者應用,需要加入的許可權 android:readPermission="android.permission.READ_SMS" android:writePermission="android.permission.WRITE_SMS" --> <uses-permission android:name="android.permission.READ_SMS" /> <uses-permission android:name="android.permission.WRITE_SMS"/>
測試的應用:監聽Android作業系統聯絡人內容提供者應用裡面的簡訊資料傳送的改變
package liudeli.cp.client; import android.app.Activity; import android.app.AlertDialog; import android.database.ContentObserver; import android.database.Cursor; import android.net.Uri; import android.os.Bundle; import android.os.Handler; public class SmsActivity extends Activity { /** * 定義訪問作業系統簡訊內容提供者應用的Uri * android:authorities="sms" */ private final String AUTHORITIES = "content://sms"; private Uri telephonyUri = Uri.parse(AUTHORITIES); @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_sms); /** * 註冊內容觀察者監聽器:用於監聽/data/data/com.android.providers.telephony內容提供者應用 * 引數一:定義訪問作業系統簡訊內容提供者應用的Uri android:authorities="sms" * 引數二:要聯級 * 引數三:監聽器 */ getContentResolver().registerContentObserver(telephonyUri, true, contentObserver); } private ContentObserver contentObserver = new ContentObserver(new Handler()) { @Override public void onChange(boolean selfChange) { super.onChange(selfChange); // 簡訊資料傳送改變啦 ... /** * 查詢簡訊最新的一條資訊顯示 */ Cursor cursor = getContentResolver().query(telephonyUri, new String[]{"address", "date", "body"}, null, // 查詢條件為null null , // 查詢條件的值為null " _id desc"); // 倒序,查詢出來的第一條就是最新的簡訊 // Cursor遊標必須往下移,才能取出資料 if (cursor.moveToFirst()) { // 移動到第一條 String address = cursor.getString(cursor.getColumnIndex("address")); String body = cursor.getString(cursor.getColumnIndex("body")); alterUser(address, body); } // 關閉遊標 cursor.close(); } }; private void alterUser(String address, String body) { new AlertDialog.Builder(this) .setPositiveButton("我知道了", null) .setTitle("注意") .setMessage("簡訊傳送改變啦, /n 簡訊號碼:" + address + " /n 簡訊內容:" + body) .show(); } @Override protected void onDestroy() { super.onDestroy(); /** * 解除監聽器 */ getContentResolver().unregisterContentObserver(contentObserver); } }
Android作業系統裡面的應用(apps),是訪問系統對外暴露的ContentProvider(providers)
自己開發的應用,也是可以訪問系統對外暴露的ContentProvider(providers)