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andreiverdes/AwesomeCursorAdapter.java

Last active August 29, 2015 14:14
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Faster alternative for OrmLiteCursorAdapter with OrmLite 4.48
Raw
AwesomeCursorAdapter.java
package com.example.ormlite.cursor;
/**
* Created by andrei on 27/01/15.
*/
import android.content.Context;
import android.database.Cursor;
import android.view.View;
import android.view.ViewGroup;
import android.widget.CursorAdapter;
import com.okit.app.android.widget.bindable.IBindable;
import java.util.HashMap;
public abstract class AwesomeCursorAdapter<T, ViewType extends View & IBindable<T>> extends CursorAdapter{
public static final int MODEL_TAG_ID = "MODEL_TAG_ID".hashCode();
private HashMap<Integer, T> mPositionsMap;
public AwesomeCursorAdapter(Context context) {
super(context, null, false);
this.mPositionsMap = new HashMap<>();
}
@SuppressWarnings("unchecked")
@Override public View getView(int position, View convertView, ViewGroup parent) {
View view = super.getView(position, convertView, parent);
this.mPositionsMap.put(position % getCursor().getCount(), ((T) view.getTag(MODEL_TAG_ID)));
return view;
}
@Override public View newView(Context context, Cursor cursor, ViewGroup parent) {
ViewType view = getNewView(context, cursor, parent);
view.setTag(MODEL_TAG_ID, getNewModel());
return view;
}
@SuppressWarnings("unchecked")
@Override public final void bindView(View itemView, Context context, Cursor cursor) {
ViewType itemViewType = (ViewType) itemView;
T t = ((T) itemViewType.getTag(MODEL_TAG_ID));
this.mapCursorToModel(cursor, t);
itemViewType.bindView(context, t);
}
@Override public T getItem(int position) {
return mPositionsMap.get(position % getCursor().getCount());
}
/**
* Here is where you map the cursor values to your model
* @return The built and initialized model
*/
protected abstract void mapCursorToModel(Cursor pCursor, T pObject);
/**
* Should return a new View to be bond with the Model
* @return
*/
protected abstract ViewType getNewView(Context context, Cursor cursor, ViewGroup parent);
/**
* Should return a new Model
* @return a new model
*/
protected abstract T getNewModel();
}
Raw
DeviceItemView.java
package com.example.ormlite.cursor;
import android.content.Context;
import android.util.AttributeSet;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.okit.app.android.model.account.DeviceModel;
import com.okit.app.android.widget.bindable.IBindable;
/**
* Created by andrei on 30/01/15.
*/
public class DeviceItemView extends LinearLayout implements IBindable<DeviceModel> {
private TextView mNameTextView;
private TextView mIdTextView;
public DeviceItemView(Context context) {
super(context);
}
public DeviceItemView(Context context, AttributeSet attrs) {
super(context, attrs);
}
public DeviceItemView(Context context, AttributeSet attrs, int defStyleAttr) {
super(context, attrs, defStyleAttr);
}
public void init(Context pContext){
//inflate your view here and find the children views;
inflate(pContext, R.layout.your_awesome_device_item_view_layout, null);
this.mNameTextView = (TextView)this.findViewById(R.id.your_awesome_device_name_text_view);
this.mIdTextView = (TextView)this.findViewById(R.id.your_awesome_device_id_text_view);
}
@Override public void bindView(Context pContext, DeviceModel pModel) {
//here map your model to the view and do the actual binding...
this.mNameTextView.setText(pModel.getName());
this.mIdTextView.setTag(pModel.getIid());
}
}
Raw
gistfile1.txt
package com.example.ormlite.cursor;
import android.content.Context;
import android.database.Cursor;
import android.view.ViewGroup;
import com.okit.app.android.model.account.DeviceModel;
import com.okit.app.android.orm.AwesomeCursorAdapter;
/**
* Created by andrei on 30/01/15.
*/
public class DeviceCursorAdapter extends AwesomeCursorAdapter<DeviceModel, DeviceItemView> {
public DeviceCursorAdapter(Context context) {
super(context);
}
@Override protected void mapCursorToModel(Cursor pCursor, DeviceModel pDeviceModel) {
pDeviceModel.setName(pCursor.getString(pCursor.getColumnIndex("name")));
pDeviceModel.setId(pCursor.getLong(pCursor.getColumnIndex("id")));
//...here you can map your cursor to the model
}
@Override public DeviceItemView getNewView(Context context, Cursor cursor, ViewGroup parent) {
return new DeviceItemView(context);
}
@Override public DeviceModel getNewModel() {
return new DeviceModel();
}
}
Raw
IBindable.java
package com.example.ormlite.cursor;
import android.content.Context;
/**
* Created by andrei on 26/01/15.
* Copyright (c) Greenchili BV 2014. All rights reserved.
*/
public interface IBindable<T> {
public void bindView(Context pContext, T pModel);
}
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