我正在创建一个 Android 应用程序，我想使用离线存储。因此，我创建了测试应用程序来测试 app42 BaaS。App42 在 TestApplication.java 中初始化。应用程序必须将信息保存在离线存储中（JSON 字符串中有关“Tonya”的信息），并且当互联网连接可用时，它必须将此信息发送到在线数据库。嗯，根据日志，“Tonya”是离线写的，但我使用“findAllDocuments”时并没有出现。当互联网连接可用时，它没有与在线数据库同步。我尝试使用不同的 Android 和 SDK 版本，但没有帮助。我究竟做错了什么？
这是 AndroidManifest.xml：
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.luka94.testapplication">
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS"/>
<application
android:name=".TestApplication"
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>
<receiver android:name="com.shephertz.app42.paas.sdk.android.App42BroadcastReceiver">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED"/>
</intent-filter>
</receiver>
<receiver android:name="com.shephertz.app42.paas.sdk.android.AlarmReceiver"/>
<service android:name="com.shephertz.app42.paas.sdk.android.App42DataSyncService"/>
</application>
</manifest>
这是 TestApplication.java ：
package com.luka94.testapplication;
import android.app.Application;
import com.shephertz.app42.paas.sdk.android.App42API;
import com.shephertz.app42.paas.sdk.android.App42CacheManager;
import com.shephertz.app42.paas.sdk.android.App42Response;
import com.shephertz.app42.paas.sdk.android.App42Exception;
import com.shephertz.app42.paas.sdk.android.App42BadParameterException;
import com.shephertz.app42.paas.sdk.android.App42NotFoundException;
import com.shephertz.app42.paas.sdk.android.App42CallBack;
import com.shephertz.app42.paas.sdk.android.storage.StorageService;
import com.shephertz.app42.paas.sdk.android.user.User;
import com.shephertz.app42.paas.sdk.android.user.User.Profile;
import com.shephertz.app42.paas.sdk.android.user.User.UserGender;
import com.shephertz.app42.paas.sdk.android.user.UserService;
public class TestApplication extends Application {
private UserService userService;
private StorageService storageService;
public static final String DB_NAME = "DBNAME";
@Override
public void onCreate() {
super.onCreate();
App42API.initialize(getApplicationContext(), "KEY_1", "KEY_2");
App42CacheManager.setPolicy(App42CacheManager.Policy.NETWORK_FIRST);
App42CacheManager.setExpiryInMinutes(60);
userService = App42API.buildUserService();
storageService = App42API.buildStorageService();
App42API.setOfflineStorage(true);
}
public UserService getUserService() {
return userService;
}
public StorageService getStorageService() {return storageService;}
}
这是 MainActivity.java ：
package com.luka94.testapplication;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import com.shephertz.app42.paas.sdk.android.App42API;
import com.shephertz.app42.paas.sdk.android.App42CallBack;
import com.shephertz.app42.paas.sdk.android.storage.Storage;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private TestApplication mApplication;
private String json;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mApplication = (TestApplication) getApplication();
json = "{\"name\":\"Tonya\",\"age\":\"28\",\"phone\":\"xxx-xxx-xxx\"}";
testWriteData();
getRecord();
}
private void getRecord() {
mApplication.getStorageService().findAllDocuments(TestApplication.DB_NAME,
"test", new App42CallBack() {
@Override
public void onSuccess(Object o) {
ArrayList<Storage.JSONDocument> jsonDocList = ((Storage) o).getJsonDocList();
if (!jsonDocList.isEmpty()) {
Log.d("TestApp", "objects finded");
for (int i = 0; i < jsonDocList.size(); i++) {
Log.d("TestApp", String.format("%s", jsonDocList.get(i).toString()));
}
}
Log.d("TestApp", String.format("is from online storage: %b", ((Storage) o).isOfflineSync()));
Log.d("TestApp", String.format("is from cache: %b", ((Storage) o).isFromCache()));
}
@Override
public void onException(Exception e) {
Log.d("TestApp", e.getMessage());
}
});
}
private void testWriteData() {
mApplication.getStorageService().insertJSONDocument(TestApplication.DB_NAME, "test", json, new App42CallBack() {
@Override
public void onSuccess(Object response) {
Storage storage = (Storage) response;
if (storage.isOfflineSync()) {
Log.d("TestApp", "writed offline");
} else {
Log.d("TestApp", "writed online");
}
}
@Override
public void onException(Exception ex) {
System.out.println("Exception Message : " + ex.getMessage());
}
});
}
}