BitmapFromUriExtraProvider.java

import java.io.InputStream;

import roboguice.inject.InjectExtra;
import android.app.Activity;
import android.content.ContentResolver;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.util.DisplayMetrics;

import com.google.inject.Inject;
import com.google.inject.Provider;

public class BitmapFromUriExtraProvider implements Provider<Bitmap> {

	@Inject
	protected Activity act;

	@InjectExtra("mediaImageUri")
	protected Uri mediaUri;

	@Override
	public Bitmap get() {

		ContentResolver resolver = act.getContentResolver();
		Bitmap bitmap = null;
		if (mediaUri != null) {
			try {
				BitmapFactory.Options options = new BitmapFactory.Options();
				options.inJustDecodeBounds = true;
				InputStream is = resolver.openInputStream(mediaUri);
				BitmapFactory.decodeStream(is, null, options);

				DisplayMetrics metrics = new DisplayMetrics();
				act.getWindowManager().getDefaultDisplay().getMetrics(metrics);

				// 端末にあわせるため、幅が広い方を高さ、狭い方を幅とする。後の事は渡した先でやってくれ

				final int width;
				final int height;
				if (options.outWidth < options.outHeight) {
					width = options.outWidth;
					height = options.outHeight;
				} else {
					width = options.outHeight;
					height = options.outWidth;
				}

				if (metrics.widthPixels * 2 < width
						|| metrics.heightPixels * 2 < height) {

					// 端末解像度 〜 端末解像度 * 2 の範囲に収まるサイズにする
					int scaleW = width / metrics.widthPixels;
					int scaleH = height / metrics.heightPixels;
					options.inSampleSize = Math.max(scaleW, scaleH);
				}

				is = resolver.openInputStream(mediaUri);
				options.inJustDecodeBounds = false;
				// NativeHeapから確保
				// https://twitter.com/shoozhoo/statuses/22621375376
				BitmapFactory.Options.class.getField("inNativeAlloc")
						.setBoolean(options, true);
				bitmap = BitmapFactory.decodeStream(is, null, options);

			} catch (Exception e) {
				e.printStackTrace();
			}
		}

		return bitmap;
	}
}

MainActivity.java

import roboguice.activity.GuiceActivity;
import roboguice.inject.InjectView;
import android.app.Activity;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.ImageButton;

public class MainActivity extends GuiceActivity {

	@SuppressWarnings("unused")
	private final Activity self = this;
	private final int REQUEST_PICK_CONTACT = 0;

	@InjectView(R.id.gallery)
	ImageButton mButton;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.main); // Injection now!!

		mButton.setOnClickListener(new OnClickListener() {
			@Override
			public void onClick(View v) {
				Intent intent = new Intent(Intent.ACTION_PICK);
				intent.setType("image/*");
				startActivityForResult(intent, REQUEST_PICK_CONTACT);
			}
		});
	}

	protected void onActivityResult(int requestCode, int resultCode, Intent data) {
		super.onActivityResult(requestCode, resultCode, data);

		if (requestCode == REQUEST_PICK_CONTACT) {
			data.setClass(this, DotActivity.class);
			Uri pictUri = data.getData();
			if (pictUri != null) {
				data.putExtra("mediaImageUri", pictUri);
				startActivity(data);
			}
		}
	}
}

ReceiveActivity.java

import roboguice.activity.GuiceActivity;
import roboguice.inject.InjectView;
import android.app.Activity;
import android.graphics.Bitmap;
import android.os.Bundle;

import com.google.inject.Inject;

public class ReceiveActivity extends GuiceActivity {

	@SuppressWarnings("unused")
	private final Activity self = this;

	// Powered by BitmapFromUriExtraProvider
	@Inject
	private Bitmap mBGBitmap;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		setContentView(R.layout.dot); // Injection now!!
	}
}