Question

I have been reading the book called “Beginning Android Games” by Mario Zechner and he has an example that is linked here in Google code.

http://code.google.com/p/beginning-android-games/source/browse/trunk/ch04-android-basics/src/com/badlogic/androidgames/BitmapTest.java

When I ran this it just shutdown on me and said Main Activity has shutdown unexpectedly.

When I ran the hello world the SDK worked just fine, but I am not sure where to start.

Android 2.2 API Level 8 is the Device I have selected since that’s what my phone has.

Here is the code I was trying to run.

import android.app.Activity;
import android.content.Context;
import android.content.res.AssetManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Rect;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import java.io.IOException;
import java.io.InputStream;

public class MainActivity extends Activity {
    class RenderView extends View {
        Bitmap bob565;
        Bitmap bob4444;
        Rect dst = new Rect();

        public RenderView(Context context) {
            super(context);

            try {
                AssetManager assetManager = context.getAssets();
                InputStream inputStream = assetManager.open("helmet.png");
                bob565 = BitmapFactory.decodeStream(inputStream);
                inputStream.close();
                Log.d("BitmapText",
                        "bobrgb888.png format: " + bob565.getConfig());

                inputStream = assetManager.open("helmet.png");
                BitmapFactory.Options options = new BitmapFactory.Options();
                options.inPreferredConfig = Bitmap.Config.ARGB_4444;
                bob4444 = BitmapFactory
                        .decodeStream(inputStream, null, options);
                inputStream.close();
                Log.d("BitmapText",
                        "bobargb8888.png format: " + bob4444.getConfig());

            } catch (IOException e) {
                // silently ignored, bad coder monkey, baaad!
            } finally {
                // we should really close our input streams here.
            }
        }

        protected void onDraw(Canvas canvas) {
            dst.set(50, 50, 350, 350);
            canvas.drawBitmap(bob565, null, dst, null);
            canvas.drawBitmap(bob4444, 100, 100, null);
            invalidate();
        }
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(new RenderView(this));
    }
}

Answer 1

The AssetManager way did not work. So I tried the following method and this did work for me.

public Bitmap getImage(String location) {
        InputStream is = RenderView.class.getResourceAsStream(location);
        return BitmapFactory.decodeStream(is);
}

RenderView is just the current class… so if your writing this code under Main.java you would write:

Main.class.getResourcesAsStream();

location is just the path to the file. For example if you have a image called ball.jpg under images folder you would just write:

String location = "images/ball.png";