CODEWITHSUNDEEP
androidbitmapandroid-view
user2316667
user2316667

Reputation: 5634

How To Initialize and Fill 2D Array of Bitmaps?

I want to initialize and display a four by four grid of circles. I'm recieving two errors:

1 is actually a warning: The static method createBitmap from type bitmap should be accessed in a static way.

1 error: The constructor Bitmap() is not visible.

Below is my code. 

package com.example.dcubebluetooth;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Paint;
import android.view.View;

public class LEDView extends View{

    Paint background = new Paint();
    Paint black = new Paint();
    Paint red = new Paint();
    int numRows = 4;
    int numCols = 4;
    Bitmap[][] leds = new Bitmap[numRows][numCols];
    Canvas ledDrawer = new Canvas();

    public LEDView(Context context) {
        super(context);
        background.setARGB(255, 255, 255, 255);
        black.setARGB(255, 0, 0, 0);
        red.setARGB(255, 255, 0, 0);
        for(int y=0; y<numCols; y++){
            for(int x=0; x<numRows; x++){
                Bitmap map =  Bitmap.createBitmap(100, 100, Config.RGB_565); //Error here
                leds[x][y] = map;
                ledDrawer.setBitmap(leds[x][y]);
                ledDrawer.drawCircle(50, 50, 50, black);
            }
        }
    }

    @Override
    protected void onDraw(Canvas canvas) {
        super.onDraw(canvas);
        canvas.drawPaint(background);
        for(int y=0; y<numCols; y++){
            for(int x=0; x<numRows; x++){
                canvas.drawBitmap(leds[x][y], x*100, y*100, null);
            }
        }
    }



}

I did a previous project in which I did this and it gave me no errors or warnings:

//Instance variable
Bitmap touchPad; 

//In constructor
touchPad = Bitmap.createBitmap(screenWidth, (int) (screenHeight*0.75), Config.RGB_565);

What is the difference between the two?

Extra information: The four by four grid will represent a layer of LEDs connected to my microcontroller. I'm gonna have four other buttons to the side to change between layers and some more arrays to store current state.

Upvotes: 0

Views: 722

Answers (1)

thiagolr
thiagolr

Reputation: 7027

There isn't any error or warning on this code! (i tested here)

You are probably seeing old warnings/errors from lint, try to clean them: Right click on the project > Android Tools > Clear Lint Markers

This warning/error happens when you are calling createBitmap from a Bitmap instance, example:

    Bitmap bmp = new Bitmap();
    bmp.createBitmap(100, 100, Config.RGB_565);

Upvotes: 1

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