Saturday 1 April 2017

Dyanamic ImageLoading in Android RecyclerView

Step 1:
gradle
compile 'com.android.support:appcompat-v7:25.0.1'
compile 'com.android.support:design:25.0.1'
compile 'com.android.support:support-v4:25.0.1'
compile 'com.android.support:recyclerview-v7:25.0.1'
compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'








Step 2:




Manifests






<!-- if you want to load images from the internet -->


<uses-permission android:name="android.permission.INTERNET" />



<!-- if you want to load images from a file OR from the internet -->


<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />






<application    android:name=".ApplicationName"
    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>
   
</application>









Step3:


Java File:


import android.app.Application;
import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.Signature;
import android.util.Base64;
import android.util.Log;

import com.fastxpo.android.fnbdelivery.utils.Utils;
import com.loopj.android.http.RequestParams;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;
import com.nostra13.universalimageloader.core.assist.QueueProcessingType;

import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;



/** * Created by karthic on 18-12-2015. */public class ApplicationName extends Application {
    public static String deviceId;

    @Override    public void onCreate() {
        super.onCreate();
        initImageLoader(getApplicationContext());
        LoadDeviceId();

        try {
            PackageInfo info = getPackageManager().getPackageInfo(
                    "com.gurubhai.fast",
                    PackageManager.GET_SIGNATURES);
            for (Signature signature : info.signatures) {
                MessageDigest md = MessageDigest.getInstance("SHA");
                md.update(signature.toByteArray());
                Log.d("KeyHash:",md+ Base64.encodeToString(md.digest(), Base64.DEFAULT));
            }
        } catch (PackageManager.NameNotFoundException e) {

        } catch (NoSuchAlgorithmException e) {

        }
    }


    public static void initImageLoader(Context context) {
        ImageLoaderConfiguration config = new ImageLoaderConfiguration.Builder(context)
                .threadPriority(Thread.NORM_PRIORITY - 2)
                .denyCacheImageMultipleSizesInMemory()
                .discCacheFileNameGenerator(new SHA256FileNameGenerator())
                .tasksProcessingOrder(QueueProcessingType.LIFO)
                .build();
        ImageLoader.getInstance().init(config);
    }

}









ImageDownloaderListener.java:






import android.graphics.Bitmap;

public interface ImageDownloaderListener {
    public void imageDownloadComplete(Bitmap bitmap);

    public void imageDownloadFailed();
}









ImageLoader.java:




import android.graphics.Bitmap;
import android.view.View;
import android.widget.ImageView;
import com.fastxpo.android.fnbdelivery.common.ApiConstants;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.assist.FailReason;
import com.nostra13.universalimageloader.core.listener.ImageLoadingListener;




public class ImageLoader {
    private com.nostra13.universalimageloader.core.ImageLoader imageLoader;
    private DisplayImageOptions options;
    private ImageDownloaderListener imageDownloaderListener;

    public ImageLoader(int onLoading, int onFailed) {
        try {
            imageLoader = com.nostra13.universalimageloader.core.ImageLoader.getInstance();
            options = new DisplayImageOptions.Builder()
                    .showImageOnLoading(onLoading)
                    .showImageForEmptyUri(onFailed)
                    .showImageOnFail(onFailed)
                    .cacheInMemory(true)
                    .cacheOnDisc(true)
                    .considerExifParams(true)
                    .bitmapConfig(Bitmap.Config.ARGB_8888)
                    .build();
        } catch (Exception e) {
            e.printStackTrace();
        }

    }

    public void displayImage(String url, ImageView imageView) {
        imageLoader.displayImage(ApiConstants.SERVER_URL + ApiConstants.IMAGEPATH + url, imageView, options);
    }

    public Bitmap getBitmap(String imageUrl) {
        final Bitmap[] bitmap = {null};
        imageLoader.loadImage(imageUrl, new ImageLoadingListener() {

            @Override            public void onLoadingStarted(String imageUri, View view) {
            }

            @Override            public void onLoadingFailed(String imageUri, View view,
                                        FailReason failReason) {
                if (imageDownloaderListener != null) {
                    imageDownloaderListener.imageDownloadFailed();
                }
            }

            @Override            public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
                if (imageDownloaderListener != null) {
                    imageDownloaderListener.imageDownloadComplete(loadedImage);
                    bitmap[0] = loadedImage;
                }
            }

            @Override            public void onLoadingCancelled(String imageUri, View view) {
                if (imageDownloaderListener != null) {
                    imageDownloaderListener.imageDownloadFailed();
                }
            }
        });
        return bitmap[0];
    }

    public void pause() {
        imageLoader.pause();
    }

    public void resume() {
        imageLoader.resume();
    }

    public void clearCache() {
        imageLoader.clearDiscCache();
        imageLoader.clearMemoryCache();
    }

    public void stop() {
        imageLoader.stop();
    }


}






SHA256FileNameGenerator.java




import com.nostra13.universalimageloader.cache.disc.naming.FileNameGenerator;
import com.nostra13.universalimageloader.utils.L;
import java.math.BigInteger;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;

public class SHA256FileNameGenerator implements FileNameGenerator {

   private static final String HASH_ALGORITHM = "SHA256";
   private static final int RADIX = 10 + 26; // 10 digits + 26 letters
   @Override   public String generate(String imageUri) {
      byte[] sha256 = getSHA256(imageUri.getBytes());
      BigInteger bi = new BigInteger(sha256).abs();
      return bi.toString(RADIX);
   }

   private byte[] getSHA256(byte[] data) {
      byte[] hash = null;
      try {
         MessageDigest digest = MessageDigest.getInstance(HASH_ALGORITHM);
         digest.update(data);
         hash = digest.digest();
      } catch (NoSuchAlgorithmException e) {
         L.e(e);
      }
      return hash;
   }

}









MainActivity.java


package com.fastxpo.android.fnbdelivery.activity;
import android.app.Activity;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.widget.Toast;
import com.fastxpo.android.fnbdelivery.R;
import com.fastxpo.android.fnbdelivery.adapter.CartAdapter;
import com.fastxpo.android.fnbdelivery.bean.orders.LineItem;
import com.fastxpo.android.fnbdelivery.sqlite.SqliteDBHandler;
import java.util.List;


public class MainActivityextends AppCompatActivity {

    RecyclerView cartRecyclerView;
    Activity activity;

    @Override    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        activity = this;
        mainRecyclerView = (RecyclerView) findViewById(R.id.mainRecyclerView);
       
        List<LineItem> allLineItems = getAllList();
        if (allLineItems.size() > 0) {
            mainRecyclerView.setLayoutManager(new LinearLayoutManager(activity, LinearLayoutManager.VERTICAL, false));
            MainAdapter mainAdapter = new MainAdapter(activity, allLineItems);
            mainRecyclerView.setAdapter(mainAdapter );
        } else {
            Toast.makeText(activity, "main List Empty", Toast.LENGTH_SHORT).show();
        }
    }
}



MainAdapter.java


package com.fastxpo.android.fnbdelivery.adapter;
import android.annotation.TargetApi;
import android.content.Context;
import android.os.Build;
import android.support.v7.widget.RecyclerView;
import android.text.TextUtils;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ImageView;
import android.widget.LinearLayout;
import android.widget.TextView;
import com.fastxpo.android.fnbdelivery.R;
import com.fastxpo.android.fnbdelivery.api.manager.ImageLoader;
import com.fastxpo.android.fnbdelivery.bean.orders.LineItem;
import java.util.List;

/** * Created by karthic on 1/4/2017. */
public class MainAdapterextends RecyclerView.Adapter<MainAdapter.MyViewHolder> {

    private Context context;
    private List<LineItem> lineItemList = null;
    private ImageLoader imageLoader;

    public MainAdapter(Context context, List<LineItem> mainDataList) {

        this.context = context;
        this.lineItemList = mainDataList;
        imageLoader = new ImageLoader(R.drawable.loading, R.drawable.loading);
    }


    public static class MyViewHolder extends RecyclerView.ViewHolder {

        protected TextView name;
        protected TextView number;
        protected ImageView image;
        protected LinearLayout relativeLayout;

        public MyViewHolder(View itemView) {
            super(itemView);
            name = (TextView) itemView.findViewById(R.id.productnameTable);
            number = (TextView) itemView.findViewById(R.id.priceTv);
            image = (ImageView) itemView.findViewById(R.id.contactimage);
            relativeLayout = (LinearLayout) itemView.findViewById(R.id.llRelativeLayout);
        }
    }

    @Override    public MainAdapter.MyViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view;
        view = LayoutInflater.from(parent.getContext()).inflate(R.layout.product_row, parent, false);
        MainAdapter.MyViewHolder myViewHolder = new MainAdapter.MyViewHolder(view);

        return myViewHolder;
    }

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    @Override    public void onBindViewHolder(final MainAdapter.MyViewHolder holder, final int position) {

   
        holder.name.setText(lineItemList.get(position).getItemname());
        holder.number.setText("S$" + lineItemList.get(position).getSellprice());

        if (!TextUtils.isEmpty(lineItemList.get(position).getImagename())) {
            String imgURL = lineItemList.get(position).getImagename();
            imageLoader.displayImage(imgURL, holder.image);
        } else {
            holder.image.setImageDrawable(context.getResources().getDrawable(R.drawable.loading));
        }

    }

    @Override    public int getItemCount() {
        return lineItemList.size();
    }

}






product_row.xml







<?xml version="1.0" encoding="utf-8"?>



<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" 



    android:id="@+id/llRelativeLayout"



    android:layout_width="match_parent"



    android:layout_height="wrap_content"



    android:layout_marginLeft="5dp"



    android:layout_marginTop="2dp"



    android:background="@color/white"



    android:orientation="horizontal">




    <RelativeLayout 



       android:layout_width="match_parent"



        android:layout_height="wrap_content"



        android:layout_margin="10dp"



        android:orientation="horizontal">




        <RelativeLayout



            android:layout_width="80dp"



            android:layout_marginLeft="10dp"



            android:layout_marginRight="20dp"



            android:id="@+id/imagell"



            android:layout_alignParentLeft="true"



            android:layout_height="80dp">




            <ImageView



                android:id="@+id/contactimage"



                android:layout_width="match_parent"



                android:layout_height="match_parent"



                android:layout_marginRight="@dimen/margin5dp"



                android:contentDescription="@string/app_name" />




            <TextView



                android:layout_width="45dp"



                android:layout_height="45dp"



                android:layout_alignParentRight="true"



                android:background="@drawable/circle"



                android:textColor="@color/white"



                android:gravity="center" 



               android:textStyle="bold" 



               android:text="New"/>




        </RelativeLayout>








        <RelativeLayout  



          android:layout_width="match_parent"   



         android:layout_height="wrap_content"  



          android:layout_centerInParent="true" 



           android:layout_toLeftOf="@+id/checkedimageLL"



            android:layout_toRightOf="@+id/imagell">








            <TextView                



              android:id="@+id/productnameTable"                



              android:layout_width="match_parent"                



              android:layout_height="wrap_content"                



              android:textColor="@color/black"                



              android:textIsSelectable="false"                



              android:textSize="15dp"                



               android:textStyle="bold" />








            <TextView                



             android:id="@+id/priceTv"                



             android:layout_width="match_parent"                



             android:layout_height="wrap_content"



             android:layout_below="@+id/productnameTable"



             android:singleLine="true" 



             android:textColor="@color/blactransparent"



             android:textIsSelectable="false"



             android:textSize="12dp" />



        </RelativeLayout>



      



    </RelativeLayout>



</LinearLayout>







































at





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