将Mongo DB与Android应用程序连接

我正在尝试构建Android应用程序以连接到MongoDB。 坚持这个问题。

MongoDB是可访问的，没有安全性。 可以使用Mono Explorer从手机添加数据。

public void sendMessage(View view) throws UnknownHostException { /**** Connect to MongoDB ****/ // Since 2.10.0, uses MongoClient MongoClient mongo = new MongoClient("", 27017); /**** Get database ****/ DB db = mongo.getDB("test"); DBCollection table = db.getCollection("test"); BasicDBObject document = new BasicDBObject(); document.put("name", "mkyong"); document.put("age", 30); document.put("createdDate", new Date(0)); try { table.insert(document); } catch (NullPointerException e) { throw new RuntimeException("unable to connect to MongoDB " + table.getFullName(), e); } } 

日志：

 11-04 19:01:56.825: E/dalvikvm(4448): Could not find class 'javax.management.ObjectName', referenced from method com.mongodb.util.management.jmx.JMXMBeanServer.createObjectName 11-04 19:01:57.095: E/AndroidRuntime(4448): FATAL EXCEPTION: main 11-04 19:01:57.095: E/AndroidRuntime(4448): java.lang.IllegalStateException: Could not execute method of the activity 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.view.View$1.onClick(View.java:3691) 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.view.View.performClick(View.java:4211) 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.view.View$PerformClick.run(View.java:17267) 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.os.Handler.handleCallback(Handler.java:615) 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.os.Handler.dispatchMessage(Handler.java:92) 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.os.Looper.loop(Looper.java:137) 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.app.ActivityThread.main(ActivityThread.java:4898) 11-04 19:01:57.095: E/AndroidRuntime(4448): at java.lang.reflect.Method.invokeNative(Native Method) 11-04 19:01:57.095: E/AndroidRuntime(4448): at java.lang.reflect.Method.invoke(Method.java:511) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773) 11-04 19:01:57.095: E/AndroidRuntime(4448): at dalvik.system.NativeStart.main(Native Method) 11-04 19:01:57.095: E/AndroidRuntime(4448): Caused by: java.lang.reflect.InvocationTargetException 11-04 19:01:57.095: E/AndroidRuntime(4448): at java.lang.reflect.Method.invokeNative(Native Method) 11-04 19:01:57.095: E/AndroidRuntime(4448): at java.lang.reflect.Method.invoke(Method.java:511) 11-04 19:01:57.095: E/AndroidRuntime(4448): at android.view.View$1.onClick(View.java:3686) 11-04 19:01:57.095: E/AndroidRuntime(4448): ... 11 more 11-04 19:01:57.095: E/AndroidRuntime(4448): Caused by: java.lang.IllegalStateException: _out shouldn't be null 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DBPort.go(DBPort.java:110) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DBPort.call(DBPort.java:74) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DBTCPConnector.innerCall(DBTCPConnector.java:286) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DBTCPConnector.call(DBTCPConnector.java:257) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:310) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DB.command(DB.java:274) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DB.command(DB.java:256) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.DB.command(DB.java:313) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.mongodb.Mongo.getDatabaseNames(Mongo.java:393) 11-04 19:01:57.095: E/AndroidRuntime(4448): at com.example.myfirstapp.MainActivity.sendMessage(MainActivity.java:48) 11-04 19:01:57.095: E/AndroidRuntime(4448): ... 14 more