CODEWITHSUNDEEP
javaandroidimagefunctionandroid-drawable
Android user
Android user

Reputation: 63

how to add drawable all images in array in android programmatically

I have a code that let me use images in drawable folder, but all the images are stored in array by name-

I wanna load them programmatically by a function and store them in array

this is the array :

private int[] theBitmapIds = { R.drawable.elefant_001, R.drawable.elefant_002, R.drawable.elefant_003, R.drawable.elefant_004,
R.drawable.elefant_005, R.drawable.elefant_006, R.drawable.elefant_007,
R.drawable.elefant_008, R.drawable.elefant_009, R.drawable.elefant_010,
R.drawable.elefant_011, R.drawable.elefant_012, R.drawable.elefant_013,
R.drawable.elefant_014, R.drawable.elefant_015, R.drawable.elefant_016,
R.drawable.elefant_017, R.drawable.elefant_018, R.drawable.elefant_019,
R.drawable.elefant_020, R.drawable.elefant_021,R.drawable.elefant_022,
R.drawable.elefant_022, R.drawable.elefant_023,R.drawable.elefant_024,
R.drawable.elefant_025, R.drawable.elefant_026, R.drawable.elefant_027,
R.drawable.elefant_028, R.drawable.elefant_029, R.drawable.elefant_030,
R.drawable.elefant_031, R.drawable.elefant_032, R.drawable.elefant_033,
R.drawable.elefant_034, R.drawable.elefant_035, R.drawable.elefant_036,
R.drawable.elefant_037, R.drawable.elefant_038, R.drawable.elefant_039,
R.drawable.elefant_040};

I changed it by the function 

public int [] theBitmapIds( ) {
    Field[] ID_Fields = R.drawable.class.getFields();
    int[] theBitmapIds = new int[ID_Fields.length];
    for (int i = 0; i < ID_Fields.length; i++) {
        try {
            theBitmapIds[i] = ID_Fields[i].getInt( null );
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }
    return  theBitmapIds;
}

private int[] theBitmapIds=theBitmapIds( );

but when I call the array in other function, it still has nothing in it 

public Bitmap getBitmap(int width, int height, int index) {
        Bitmap b = Bitmap.createBitmap(width, height,
                Bitmap.Config.ARGB_8888);
        b.eraseColor(0xFFFFFFFF);
        Canvas c = new Canvas(b);
        Drawable d = getResources().getDrawable(theBitmapIds[index]);

        int margin = 1;
        int border = 1;
        Rect r = new Rect(margin, margin, width - margin, height - margin);

        int imageWidth = r.width() - (border * 2);
        int imageHeight = imageWidth * d.getIntrinsicHeight()
                / d.getIntrinsicWidth();
        if (imageHeight > r.height() - (border * 2)) {
            imageHeight = r.height() - (border * 2);
            imageWidth = imageHeight * d.getIntrinsicWidth()
                    / d.getIntrinsicHeight();
        }

I am confused especially I'm a noob in java. How I can make this code work by editing the function or by change this line of code:

private int[] theBitmapIds=theBitmapIds( );

or

Drawable d = getResources().getDrawable(theBitmapIds[index]);

Someone help me pls!

Upvotes: 1

Views: 550

Answers (1)

Hyun I Kim
Hyun I Kim

Reputation: 589

You can use AssetManager to directly load assets with their paths.

You can get its instance by calling context.getAssets().

With it's open() method, you'll be able to get an InputStream for that asset.

Then you can use BitmapFactory.decodeStream() to convert it into Bitmap.

Upvotes: 1

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