fix crashes when Application try to restore database

Author: ArchieMeng

mobile/build.gradle

@@ -8,7 +8,7 @@ android {
         minSdkVersion 19
         targetSdkVersion 25
         versionCode 30
-        versionName "2.3.2b"
+        versionName "2.3.4b"
         resConfigs "en", "zh_cn", "zh_tw"
     }
     buildTypes {

mobile/src/main/java/info/papdt/express/helper/ui/MainActivity.java

@@ -36,6 +36,8 @@ public class MainActivity extends AbsActivity implements OnMenuTabClickListener
 	private BottomBar mBottomBar;
 	private BaseFragment[] fragments;
 
+	private final String TAG = "express.MainActivity";
+
 	private PackageDatabase mDatabase;
 
 	public static final int REQUEST_ADD = 10001, RESULT_NEW_PACKAGE = 2000, REQUEST_DETAILS = 10002, RESULT_DELETED = 2001, RESULT_RENAMED = 2002;
@@ -44,6 +46,7 @@ public class MainActivity extends AbsActivity implements OnMenuTabClickListener
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
+		Log.i(TAG, "MainActivity launch");
 		super.onCreate(savedInstanceState);
 
 		if (getSettings().getBoolean(Settings.KEY_NAVIGATION_TINT, true)

mobile/src/main/java/info/papdt/express/helper/ui/SplashActivity.java

@@ -20,7 +20,7 @@
 import info.papdt.express.helper.ui.common.AbsActivity;
 
 public class SplashActivity extends AbsActivity {
-	private String TAG = "express.SplashActivity";
+	private final String TAG = "express.SplashActivity";
 	private ImageView mLogoView;
 	private AppCompatTextView mTitleView;
 	/**
@@ -31,6 +31,7 @@ public class SplashActivity extends AbsActivity {
 
 	@Override
 	protected void onCreate(Bundle savedInstanceState) {
+		Log.i(TAG, "SplashActivity launch");
 		super.onCreate(savedInstanceState);
 		if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
 			getWindow().getDecorView().setSystemUiVisibility(
@@ -64,8 +65,8 @@ protected void setUpViews() {
 		mLogoView = $(R.id.iv_logo);
 		mTitleView = $(R.id.tv_title);
 
-		MaterialImageLoader.animate(mLogoView).setDuration(1500).start();
-		mTitleView.animate().alpha(1f).setDuration(600).start();
+		MaterialImageLoader.animate(mLogoView).setDuration(1000).start();
+		mTitleView.animate().alpha(1f).setDuration(500).start();
 	}
 
 	/**

mobile/src/main/java/info/papdt/express/helper/ui/fragment/home/BaseFragment.java

@@ -1,5 +1,7 @@
 package info.papdt.express.helper.ui.fragment.home;
 
+import android.app.Activity;
+import android.content.Context;
 import android.os.AsyncTask;
 import android.os.Bundle;
 import android.os.Handler;
@@ -32,7 +34,7 @@ public abstract class BaseFragment extends AbsFragment implements SwipeRefreshLa
 	private RecyclerViewSwipeManager mSwipeManager;
 
 	private PackageDatabase mDatabase;
-
+	private static Context sInstance = null;
 	private final static int FLAG_REFRESH_LIST = 0, FLAG_UPDATE_ADAPTER_ONLY = 1;
 
 	int eggCount = 0, bigEggCount = 0;
@@ -41,8 +43,22 @@ public BaseFragment(PackageDatabase database) {
 		this.mDatabase = database;
 	}
 
-	public BaseFragment() {
-		this.mDatabase = PackageDatabase.getInstance(getContext());
+	public BaseFragment(){
+		super();
+	}
+
+	// official method to get Activity Context
+	@Override
+	public void onAttach(Activity activity) {
+		super.onAttach(activity);
+		sInstance = activity;
+	}
+
+	// restore database to reconstruct express info
+	@Override
+	public void onCreate(Bundle savedInstanceState) {
+		super.onCreate(savedInstanceState);
+		this.mDatabase = PackageDatabase.getInstance(sInstance);
 	}
 
 	@Override