Android ImageView is rendering Bitmap images smaller while in ListView

Question

I have a ListView, inside a linear layout, that should show items based on a list_item.xml layout file. In the layout file I have two ImageViews and two TextViews. I'm using my custom ArrayAdapter to fill the ListView at runtime with Bitmap images of scale 125x25, however images are showing smaller than their initial size when rendered by the ImageView inside the ListView as shown in the screenshot (of a single list item) below:

ActivityLayout.xml:

...
<LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_alignParentStart="true"
    android:paddingTop="40dp"
    android:orientation="vertical">

    <ListView
        android:id="@+id/lvExp"
        android:layout_width="match_parent"
        android:layout_height="match_parent" />

</LinearLayout>
...

List_item.xml:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:minHeight="?android:attr/listPreferredItemHeight">

    <ImageView
        android:id="@+id/imageViewplate"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_alignParentLeft="true"
        android:adjustViewBounds="true"
        android:minWidth="300dp" />

    <TextView
        android:id="@+id/lblListItem_letter"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@id/imageViewplate"
        android:padding="3dp"
        android:text="A"
        android:textSize="17dip" />

    <TextView
        android:id="@+id/lblListItem_num"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_marginLeft="10dp"
        android:layout_toRightOf="@id/lblListItem_letter"
        android:padding="3dp"
        android:text="123456"
        android:textSize="17dip" />

    <ImageView
        android:id="@+id/imageViewchars"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_alignParentRight="true"
        android:layout_alignParentBottom="true"
        android:layout_marginLeft="10dp"
        android:paddingTop="3dp"
        android:paddingBottom="3dp" />

</RelativeLayout>

My custom list adapter:

    package bi.anpr.layouts;

import android.content.Context;
import android.support.design.widget.Snackbar;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.ImageView;
import android.widget.TextView;

import com.sxx.vlctest.R;

import java.util.ArrayList;

import bi.anpr.agents.Plate;

public class PlateListAdapter extends ArrayAdapter<Plate>{

    public PlateListAdapter(Context context, int resource) {
        super(context, resource);
    }

    private ArrayList<Plate> dataSet;
    Context mContext;

    private static class ViewHolder {
        public ImageView imageView_plate, imageView_chars;
        public TextView textView_letter, textView_numbers;
    }

    private int lastPosition = -1;

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        // Get the data item for this position
        Plate plate = getItem(position);
        ViewHolder viewHolder;
        final View result;

        if (convertView == null) {
            viewHolder = new ViewHolder();

            LayoutInflater inflater = LayoutInflater.from(getContext());
            convertView = inflater.inflate(R.layout.list_item, parent, false);

            viewHolder.textView_letter = (TextView) convertView.findViewById(R.id.lblListItem_letter);
            viewHolder.textView_numbers = (TextView) convertView.findViewById(R.id.lblListItem_num);
            viewHolder.imageView_plate = (ImageView) convertView.findViewById(R.id.imageViewplate);
            viewHolder.imageView_chars = (ImageView) convertView.findViewById(R.id.imageViewchars);
            result = convertView;

            convertView.setTag(viewHolder);
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
            result = convertView;
        }

        lastPosition = position;

        try{
            viewHolder.imageView_plate.setImageBitmap(plate.getEngPartImageIcon());
            viewHolder.imageView_chars.setImageBitmap(plate.getcharsImageIcon());
            viewHolder.textView_letter.setText(Character.toString(plate.getPlateLetter()));
            viewHolder.textView_numbers.setText(plate.getPlateNumbersAsString());
        }catch (Exception e){
            e.printStackTrace();
        }


        // Return the completed view to render on screen
        return convertView;
    }
}

Plate.java:

package bi.anpr.agents;

import android.graphics.Bitmap;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.graphics.Typeface;

import java.io.Serializable;
import java.util.ArrayList;


import org.opencv.core.Mat;
import org.opencv.core.Rect;

import bi.anpr.core.IPHelper;

public class Plate implements Serializable {

    private String platePath;
    private boolean isWidePlate = true;
    private int[] color;
    private String colorString;
    private String source = "";
    private Rect bdgbx;
    private Mat srcImage;
    private Mat plateImage;
    private Bitmap engPartImageIcon, plateImageIcon, forCutImageIcon, charsImageIcon, charsTextImageIcon;
    private Mat engPartImage;
    private Mat forCut;
    private ArrayList<Character> plateNumberChars = new ArrayList<>();
    private char plateLetterChar = '#';
    private String fullPlateString = "";
    private String numbersPlateString = "";
    private double letterRate = 0;
    private double numbersRate = 0;
    private double accuracy = 0;
    private int id;
    private PlateRecogInfo plateRecogInfo;
    private ArrayList<Bitmap> charsIcons = new ArrayList<>();
    private boolean ignore = false;
    private int accurayPercent = 0;

    public Plate() {
        plateRecogInfo = new PlateRecogInfo();
    }

    public void addPlateNumberChar(char c) {
        plateNumberChars.add(c);
    }

    public Bitmap getplateImageIcon() {
        return plateImageIcon;
    }

    public void setPlateImageIcon(Bitmap plateImageIcon) {
        this.plateImageIcon = plateImageIcon;
    }

    public Bitmap getEngPartImageIcon() {
        if (engPartImageIcon == null) {
            engPartImageIcon = IPHelper.matToBitmap(engPartImage);
        }
        return engPartImageIcon;
    }

    public void setEngPartImageIcon(Bitmap engPartImageIcon) {
        this.engPartImageIcon = engPartImageIcon;
    }

    public Mat getEngPartImage() {
        return engPartImage;
    }

    public void setEngPartImage(Mat engPartImage) {
        this.engPartImage = engPartImage;
    }

    public boolean isWidePlate() {
        return isWidePlate;
    }

    public void setWidePlate(boolean isWidePlate) {
        this.isWidePlate = isWidePlate;
    }

    public Mat getImage() {
        return plateImage;
    }

    public void setImage(Mat Bitmap) {
        plateImage = Bitmap;
    }

    public Bitmap getForCutImageIcon() {
        if (forCutImageIcon == null) {
            forCutImageIcon = IPHelper.matToBitmap(forCut);
        }
        return forCutImageIcon;
    }

    public Mat getForCut() {
        return forCut;
    }

    public void setForCutImageIcon(Bitmap forCutImageIcon) {
        this.forCutImageIcon = forCutImageIcon;
    }

    public void setForCut(Mat forCut) {
        this.forCut = forCut;
    }

    public ArrayList<Character> getPlateNumberChar() {
        return plateNumberChars;
    }

    public void setPlateNumberChar(ArrayList<Character> nchar) {
        plateNumberChars = new ArrayList<Character>(nchar);
    }

    public char getPlateLetter() {
        return plateLetterChar;
    }

    public void setPlateLetter(char plateLetter) {
        plateLetterChar = plateLetter;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public double getLetterRate() {
        return letterRate;
    }

    public void setLetterRate(double letterRate) {
        this.letterRate = letterRate;
    }

    public double getCharsRate() {
        return numbersRate;
    }

    public void setNumbersRate(double NumbersRate) {
        this.numbersRate = NumbersRate;
    }

    public double getAccuracy() {
        return accuracy;
    }

    public int getAccurayPercent() {
        return accurayPercent;
    }

    public void setAccuracy(double totalRate) {
        this.accuracy = totalRate;
        this.accurayPercent = (int) (totalRate * 100);
    }

    public Mat getPlateImage() {
        return plateImage;
    }

    public void setPlateImage(Mat matImage) {
        this.plateImage = matImage;
        plateImageIcon = IPHelper.matToBitmap(matImage);
    }

    public PlateRecogInfo getPlateRecogInfo() {
        return plateRecogInfo;
    }

    public void setPlateRecogInfo(PlateRecogInfo plateRecogInfo) {
        this.plateRecogInfo = plateRecogInfo;
    }

    public void addCharIcon(Mat charsIcons) {
        this.charsIcons.add(IPHelper.matToBitmap(charsIcons));
    }

    public Bitmap getcharsImageIcon() {
        if (charsImageIcon == null) {
            int width = 5;
            int height = 0;
            for (Bitmap icon : charsIcons) {
                if (icon.getHeight() > height)
                    height = icon.getHeight();
                width += icon.getWidth() + 5;
            }
            height += 6;

            charsImageIcon = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
            Canvas canvas = new Canvas(charsImageIcon);

            int i = 0;
            for (Bitmap icon : charsIcons) {
                canvas.drawBitmap(icon, i, 3, null);
                i += icon.getWidth() + 5;
            }
        }

        return charsImageIcon;
    }

    public Bitmap getCharsTextImageIcon() {
        if (charsTextImageIcon == null) {
            String chars = "";
            for (Character c : plateNumberChars) {
                String cs = c.toString();
                chars += cs;
            }

            int width = 5;
            int height = 0;
            for (Bitmap icon : charsIcons) {
                if (icon.getHeight() > height)
                    height = icon.getHeight();
                width += icon.getWidth() + 5;
            }
            height += 6;

            charsTextImageIcon = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
            Canvas canvas = new Canvas(charsTextImageIcon);

            int i = 0;
            int j = 0;

            Paint paint = new Paint(Paint.ANTI_ALIAS_FLAG);
            paint.setTypeface(Typeface.create(Typeface.DEFAULT, Typeface.BOLD));
            paint.setColor(Color.BLACK);
            paint.setTextSize(16);

            canvas.drawColor(Color.WHITE);

            for (Bitmap icon : charsIcons) {

                if (j == 0)
                    canvas.drawText("Some Text", i + 2, 19, paint);
                else
                    canvas.drawText(Character.toString(chars.charAt(j - 1)), i + 3, 19, paint);

                i += icon.getWidth() + 5;
                j++;
            }

        }

        return charsTextImageIcon;
    }

    public void setCharsTextImageIcon(Bitmap charsTextImageIcon) {
        this.charsTextImageIcon = charsTextImageIcon;
    }

    public Mat getSrcImage() {
        return srcImage;
    }

    public void setSrcImage(Mat srcImage) {
        this.srcImage = srcImage;
    }

    public Rect getBdgbx() {
        return bdgbx;
    }

    public void setBdgbx(Rect bdgbx) {
        this.bdgbx = bdgbx;
    }

    public int[] getColor() {
        return color;
    }

//    public Color getColorObject() {
//        int[] color = getColor();
//
//        try {
//            return Color.parseColor(Color.rgb(color[0], color[1], color[2]));
//        } catch (Exception e) {
//        }
//        return null;
//    }

    public void setColor(int[] is) {
        this.color = is;
    }

    public String getColorString() {
        return colorString;
    }

    public void setColorString(String colorString) {
        this.colorString = colorString;
    }

    public String getFullPlateCharsString() {
        if (fullPlateString == "" || fullPlateString == null) {
            fullPlateString += plateLetterChar;
            for (Character c : plateNumberChars) {
                fullPlateString += c.toString();
            }
        }

        return fullPlateString;
    }

    public void setFullPlateString(String fullPlateString) {
        this.fullPlateString = fullPlateString;
    }

    public void setNumbersPlateString(String numbersPslateString) {
        this.numbersPlateString = numbersPslateString;
    }

    public String getPlateNumbersAsString() {
        if (numbersPlateString == "" || numbersPlateString == null) {
            for (Character c : plateNumberChars) {
                numbersPlateString += c.toString();
            }
        }

        return numbersPlateString;
    }

    public String getPlatePath() {
        return platePath;
    }

    public void setPlatePath(String platePath) {
        this.platePath = platePath;
    }

    public boolean isIgnore() {
        return ignore;
    }

    public void setIgnore(boolean ignore) {
        this.ignore = ignore;
    }

    public String getSource() {
        return source;
    }

    public void setSource(String source) {
        this.source = source;
    }

}

Usage:

PlateListAdapter plateListAdapter = new PlateListAdapter(getApplicationContext(), R.layout.list_item);
ListView resultsListView = (ListView) findViewById(R.id.lvExp);
resultsListView.setAdapter(plateListAdapter);
plateListAdapter.addAll(recogInfo.getPlates());
plateListAdapter.notifyDataSetChanged();

Answer 1

Using definite dimensions for ImageView's, rather than wrap_content solved the problem.