Android Open Source - TheCompressYourFiles Expand Image

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License

The source code is released under:

Apache License

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Java Source Code

package th.watsize.imageviewer;
//from  ww  w . j a  v  a2s.c o  m
import java.io.File;

import th.watsize.filebrowser.FileUtils;

import th.watsize.filebrowser.R;


import android.app.Activity;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.BitmapFactory.Options;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;

public class ExpandImage extends Activity {

  private static final int TARGET_HEIGHT = 800;
  private static final int TARGET_WIDTH = 480;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.expandimage);
    TouchImageView tiv = (TouchImageView) findViewById(R.id.touchimageview);

    String file = this.getIntent().getStringExtra("fileURI");

    Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;

    BitmapFactory.decodeFile(file, options);
    if (options.outHeight != -1 && options.outWidth != -1) {
      FileUtils.printDebug("Image is valid - " + file.toString());
      // Only scale if we need to
      Boolean scaleByHeight = !(Math.abs(options.outHeight
          - TARGET_HEIGHT) >= Math.abs(options.outWidth
          - TARGET_WIDTH));

      // Load, scaling to smallest power of 2 that'll get it <=
      // desired
      // dimensions
      double sampleSize = scaleByHeight ? options.outHeight
          / TARGET_HEIGHT : options.outWidth / TARGET_WIDTH;
      options.inSampleSize = (int) Math.pow(2d, Math.floor(Math
          .log(sampleSize)
          / Math.log(2d)));

      // Do the actual decoding
      options.inJustDecodeBounds = false;
      Bitmap img = BitmapFactory.decodeFile(file, options);
      
      if (img == null){
        FileUtils.printDebug("  ExpandImage: img is null");
      }
      
      tiv.setImage(img, tiv.getWidth(), tiv.getHeight());
      tiv.setOnClickListener(new OnClickListener() {

        public void onClick(View v) {
          ExpandImage.this.finish();
        }
      });
    }
  }

  @Override
  public void onConfigurationChanged(Configuration newConfig) {
    super.onConfigurationChanged(newConfig);

    FileUtils.printDebug("onConfigurationChanged()");
  }

}

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