- Changing Transaction List to use PagedList

app/build.gradle

@@ -34,11 +34,12 @@ dependencies {
     compile 'com.android.support.constraint:constraint-layout:1.0.2'
     testCompile 'junit:junit:4.12'
 
-    compile "android.arch.lifecycle:runtime:1.0.0-alpha9"
+    compile "android.arch.lifecycle:runtime:1.0.0-alpha9-1"
-    compile "android.arch.lifecycle:extensions:1.0.0-alpha9"
+    compile "android.arch.lifecycle:extensions:1.0.0-alpha9-1"
-    annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha9"
+    annotationProcessor "android.arch.lifecycle:compiler:1.0.0-alpha9-1"
-    compile 'android.arch.persistence.room:runtime:1.0.0-alpha9';
+    compile 'android.arch.persistence.room:runtime:1.0.0-alpha9-1';
-    apt "android.arch.persistence.room:compiler:1.0.0-alpha9";
+    apt "android.arch.persistence.room:compiler:1.0.0-alpha9-1";
+    compile "android.arch.paging:runtime:1.0.0-alpha1";
 
     compile 'com.idescout.sql:sqlscout-server:2.0';
 }

app/src/main/java/cy/agorise/crystalwallet/IntroActivity.java

@@ -5,6 +5,7 @@ import android.arch.lifecycle.LiveData;
 import android.arch.lifecycle.Observer;
 import android.arch.lifecycle.ViewModelProvider;
 import android.arch.lifecycle.ViewModelProviders;
+import android.arch.paging.PagedList;
 import android.os.Bundle;
 import android.support.annotation.Nullable;
 import android.support.v7.app.AppCompatActivity;
@@ -31,11 +32,11 @@ public class IntroActivity extends LifecycleActivity {
         transactionListView = this.findViewById(R.id.transaction_list);
 
         transactionListViewModel = ViewModelProviders.of(this).get(TransactionListViewModel.class);
-        LiveData<List<CryptoCoinTransaction>> transactionData = transactionListViewModel.getTransactionList();
+        LiveData<PagedList<CryptoCoinTransaction>> transactionData = transactionListViewModel.getTransactionList();
 
-        transactionData.observe(this, new Observer<List<CryptoCoinTransaction>>() {
+        transactionData.observe(this, new Observer<PagedList<CryptoCoinTransaction>>() {
             @Override
-            public void onChanged(List<CryptoCoinTransaction> cryptoCoinTransactions) {
+            public void onChanged(PagedList<CryptoCoinTransaction> cryptoCoinTransactions) {
                 transactionListView.setData(cryptoCoinTransactions);
             }
         });

app/src/main/java/cy/agorise/crystalwallet/dao/TransactionDao.java

@@ -1,6 +1,7 @@
 package cy.agorise.crystalwallet.dao;
 
 import android.arch.lifecycle.LiveData;
+import android.arch.paging.LivePagedListProvider;
 import android.arch.persistence.room.Dao;
 import android.arch.persistence.room.Insert;
 import android.arch.persistence.room.OnConflictStrategy;
@@ -19,6 +20,9 @@ public interface TransactionDao {
     @Query("SELECT * FROM crypto_coin_transaction")
     LiveData<List<CryptoCoinTransaction>> getAll();
 
+    @Query("SELECT * FROM crypto_coin_transaction ORDER BY date ASC")
+    LivePagedListProvider<Integer, CryptoCoinTransaction>  transactionsByDate();
+
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     public void insertTransaction(CryptoCoinTransaction... transactions);
 }

app/src/main/java/cy/agorise/crystalwallet/models/CryptoCoinTransaction.java

@@ -3,6 +3,8 @@ package cy.agorise.crystalwallet.models;
 import android.arch.persistence.room.ColumnInfo;
 import android.arch.persistence.room.Entity;
 import android.arch.persistence.room.PrimaryKey;
+import android.support.annotation.NonNull;
+import android.support.v7.recyclerview.extensions.DiffCallback;
 
 import java.util.Date;
 
@@ -130,4 +132,37 @@ public class CryptoCoinTransaction {
     public int getIdAsset() { return idAsset; }
 
     public void setIdAsset(int idAsset) { this.idAsset = idAsset; }
+
+
+    public static final DiffCallback<CryptoCoinTransaction> DIFF_CALLBACK = new DiffCallback<CryptoCoinTransaction>() {
+        @Override
+        public boolean areItemsTheSame(
+                @NonNull CryptoCoinTransaction oldTransaction, @NonNull CryptoCoinTransaction newTransaction) {
+            return oldTransaction.getId() == newTransaction.getId();
+        }
+        @Override
+        public boolean areContentsTheSame(
+                @NonNull CryptoCoinTransaction oldTransaction, @NonNull CryptoCoinTransaction newTransaction) {
+            return oldTransaction.equals(newTransaction);
+        }
+    };
+
+
+    @Override
+    public boolean equals(Object o) {
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        CryptoCoinTransaction that = (CryptoCoinTransaction) o;
+
+        if (isInput != that.isInput) return false;
+        if (accountId != that.accountId) return false;
+        if (amount != that.amount) return false;
+        if (idAsset != that.idAsset) return false;
+        if (isConfirmed != that.isConfirmed) return false;
+        if (date != null ? !date.equals(that.date) : that.date != null) return false;
+        if (from != null ? !from.equals(that.from) : that.from != null) return false;
+        return to != null ? to.equals(that.to) : that.to == null;
+
+    }
 }

app/src/main/java/cy/agorise/crystalwallet/viewmodels/TransactionListViewModel.java

@@ -4,6 +4,7 @@ import android.app.Application;
 import android.arch.lifecycle.AndroidViewModel;
 import android.arch.lifecycle.LiveData;
 import android.arch.lifecycle.ViewModel;
+import android.arch.paging.PagedList;
 import android.content.Context;
 
 import java.util.List;
@@ -18,17 +19,21 @@ import cy.agorise.crystalwallet.views.TransactionListView;
 
 public class TransactionListViewModel extends AndroidViewModel {
 
-    private LiveData<List<CryptoCoinTransaction>> transactionList;
+    private LiveData<PagedList<CryptoCoinTransaction>> transactionList;
     private CrystalDatabase db;
 
     public TransactionListViewModel(Application application) {
         super(application);
         this.db = CrystalDatabase.getAppDatabase(application.getApplicationContext());
-        transactionList = this.db.transactionDao().getAll();
+        transactionList = this.db.transactionDao().transactionsByDate().create(0,
+                new PagedList.Config.Builder()
+                        .setPageSize(10)
+                        .setPrefetchDistance(10)
+                        .build()
+        );
     }
 
-    public LiveData<List<CryptoCoinTransaction>> getTransactionList(){
+    public LiveData<PagedList<CryptoCoinTransaction>> getTransactionList(){
         return this.transactionList;
     }
-
 }

app/src/main/java/cy/agorise/crystalwallet/views/TransactionListAdapter.java

@@ -2,9 +2,11 @@ package cy.agorise.crystalwallet.views;
 
 
 import android.arch.lifecycle.LiveData;
+import android.arch.paging.PagedListAdapter;
 import android.content.Context;
 import android.support.annotation.NonNull;
 import android.support.annotation.Nullable;
+import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -21,36 +23,24 @@ import cy.agorise.crystalwallet.models.CryptoCoinTransaction;
  * Created by Henry Varona on 11/9/2017.
  */
 
-public class TransactionListAdapter extends ArrayAdapter<CryptoCoinTransaction> {
+public class TransactionListAdapter extends PagedListAdapter<CryptoCoinTransaction, TransactionViewHolder> {
 
-    //List<CryptoCoinTransaction> items;
+    public TransactionListAdapter() {
-
+        super(CryptoCoinTransaction.DIFF_CALLBACK);
-    public TransactionListAdapter(Context context, List<CryptoCoinTransaction> items) {
-        super(context, 0, items);
-    }
-
-    public void updateData(List<CryptoCoinTransaction> items){
-        this.clear();
-        this.addAll(items);
-        this.notifyDataSetChanged();
     }
 
     @Override
-    public View getView(int position, View convertView, ViewGroup parent) {
+    public TransactionViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
+        return null;
+    }
+
+    @Override
+    public void onBindViewHolder(TransactionViewHolder holder, int position) {
         CryptoCoinTransaction transaction = getItem(position);
-
+        if (transaction != null) {
-        if (convertView == null) {
+            holder.bindTo(transaction);
-            convertView = LayoutInflater.from(getContext()).inflate(R.layout.transaction_list_item, parent, false);
+        } else {
-        }
+            holder.clear();
-
+        }
-        TextView tvFrom = (TextView) convertView.findViewById(R.id.fromText);
-        TextView tvTo = (TextView) convertView.findViewById(R.id.toText);
-        TextView tvAmount = (TextView) convertView.findViewById(R.id.amountText);
-
-        tvFrom.setText(transaction.getFrom());
-        tvTo.setText(transaction.getTo());
-        tvAmount.setText(""+transaction.getAmount());
-
-        return convertView;
     }
 }

app/src/main/java/cy/agorise/crystalwallet/views/TransactionListView.java

@@ -1,6 +1,9 @@
 package cy.agorise.crystalwallet.views;
 
+import android.arch.paging.PagedList;
+import android.arch.paging.PagedListAdapter;
 import android.content.Context;
+import android.support.v7.widget.RecyclerView;
 import android.util.AttributeSet;
 import android.view.View;
 import android.widget.ListView;
@@ -19,7 +22,7 @@ import cy.agorise.crystalwallet.viewmodels.TransactionListViewModel;
 public class TransactionListView extends RelativeLayout {
 
     View rootView;
-    ListView listView;
+    RecyclerView listView;
     TransactionListAdapter listAdapter;
 
     TransactionListViewModel transactionListViewModel;
@@ -30,12 +33,12 @@ public class TransactionListView extends RelativeLayout {
         this.listView = rootView.findViewById(R.id.transactionListView);
     }
 
-    public void setData(List<CryptoCoinTransaction> data){
+    public void setData(PagedList<CryptoCoinTransaction> data){
         if (this.listAdapter == null) {
-            this.listAdapter = new TransactionListAdapter(this.getContext(), data);
+            this.listAdapter = new TransactionListAdapter();
             this.listView.setAdapter(this.listAdapter);
         } else {
-            this.listAdapter.updateData(data);
+            this.listAdapter.setList(data);
         }
     }
 

app/src/main/java/cy/agorise/crystalwallet/views/TransactionViewHolder.java

@@ -0,0 +1,44 @@
+package cy.agorise.crystalwallet.views;
+
+import android.support.v7.widget.RecyclerView;
+import android.view.View;
+import android.widget.TextView;
+
+import cy.agorise.crystalwallet.R;
+import cy.agorise.crystalwallet.models.CryptoCoinTransaction;
+
+/**
+ * Created by Henry Varona on 17/9/2017.
+ */
+
+public class TransactionViewHolder extends RecyclerView.ViewHolder {
+    private TextView transactionFrom;
+    private TextView transactionTo;
+    private TextView transactionAmount;
+
+
+    public TransactionViewHolder(View itemView) {
+        super(itemView);
+        transactionFrom = (TextView) itemView.findViewById(R.id.fromText);
+        transactionTo = (TextView) itemView.findViewById(R.id.toText);
+        transactionAmount = (TextView) itemView.findViewById(R.id.amountText);
+    }
+
+    public void clear(){
+        transactionFrom.setText("loading...");
+        transactionTo.setText("");
+        transactionAmount.setText("");
+    }
+
+    public void bindTo(final CryptoCoinTransaction transaction/*, final OnTransactionClickListener listener*/) {
+        transactionFrom.setText(transaction.getFrom());
+        transactionTo.setText(transaction.getTo());
+        transactionAmount.setText(""+transaction.getAmount());
+        /*itemView.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                listener.onUserClick(user);
+            }
+        });*/
+    }
+}

app/src/main/res/layout/transaction_list.xml

@@ -3,7 +3,7 @@
     android:orientation="vertical" android:layout_width="match_parent"
     android:layout_height="match_parent">
 
-    <ListView
+    <RecyclerView
         android:id="@+id/transactionListView"
         android:layout_width="match_parent"
         android:layout_height="match_parent" />