TiledMapTile set texture region gives NullPointerException

Question

I'm having some trouble with setting texture region to my TiledMapTile. It gives me NullPointerException and I have no idea why.

Here is some code:

TiledMapTile coinTile;

public void show () {
    mapTexture1 = new Texture(Gdx.files.internal("maps/other/texture1.png"));

    TextureRegion mapTexture1Region = new TextureRegion(mapTexture1, 32, 0, 16, 16);
    coinTile.setTextureRegion(mapTexture1Region);
}

And here is the error:

04-09 21:57:18.222: E/AndroidRuntime(7792): java.lang.NullPointerException
04-09 21:57:18.222: E/AndroidRuntime(7792): at com.never.mind.screens.GameScreen.show(GameScreen.java:225)

which leads to this line:

coinTile.setTextureRegion(mapTexture1Region);

Answer 1

Usually, a NullPointerException happens when you did not initialize something in your code.

Since you did not provide your full code, I could only give your suggestions. Like what you did

mapTexture1 = new Texture(Gdx.files.internal("maps/other/texture1.png"));

You should also

coinTile = new TiledMapTile () {
@Override
public int getId() {
    return 0;
}

@Override
public void setId(int id) {

}

@Override
public BlendMode getBlendMode() {
    return null;
}

@Override
public void setBlendMode(BlendMode blendMode) {

}

@Override
public TextureRegion getTextureRegion() {
    return null;
}

@Override
public void setTextureRegion(TextureRegion textureRegion) {

}

@Override
public float getOffsetX() {
    return 0;
}

@Override
public void setOffsetX(float offsetX) {

}

@Override
public float getOffsetY() {
    return 0;
}

@Override
public void setOffsetY(float offsetY) {

}

@Override
public MapProperties getProperties() {
    return null;
}

}

By the way read the API for spcific paremeters.

Since you are new to java read here to get a grasp of NullPointers