Android Open Source - adr Main Activity

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License

The source code is released under:

Copyright (c) 2014, blake kim All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: * Re...

Java Source Code

package com.kkh.imagetest;
/*ww w.ja  v a  2s . co m*/
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Matrix;
import android.media.ExifInterface;
import android.os.Bundle;
import android.util.Log;
import android.view.Menu;
import android.view.MenuItem;
import android.view.ViewTreeObserver;
import android.widget.ImageView;
import android.widget.ImageView.ScaleType;

public class MainActivity extends Activity {
  static final String tag = "main";
  ImageView mImgView;

  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Log.e(tag, "onCreate...");
    loadImgToStorage();
    
    mImgView = (ImageView) findViewById(R.id.ivImg);
    
    ViewTreeObserver vto = mImgView.getViewTreeObserver();
    vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {
        public boolean onPreDraw() {
//            iv.getViewTreeObserver().removeOnPreDrawListener(this);
//            finalHeight = iv.getMeasuredHeight();
//            finalWidth = iv.getMeasuredWidth();
//            tv.setText("Height: " + finalHeight + " Width: " + finalWidth);
          Log.d(tag, "on observer, width=" + mImgView.getWidth());
          Bitmap bitmap = getDecodedImage();
        // ?????? ????????? ????? ??? ????? ????? ?? ??.
        // FIT_CENTER? ?? ?? ??.
        mImgView.setScaleType(ScaleType.FIT_CENTER);
        mImgView.setImageBitmap(bitmap);
        
            return true;
        }
    });
    
    
    
    
    
  }
  
  @Override
  protected void onResume() {
    // TODO Auto-generated method stub
    super.onResume();
  }

  void loadImgToStorage() {
    try {
      InputStream inf = getAssets().open("pic_exam.jpg");
      OutputStream outf = new BufferedOutputStream( new FileOutputStream(getApplicationContext().getFilesDir()+"temp_img") );
      byte[] buf = new byte[4*1024];
      for(;;) {
        int rdcnt = inf.read(buf);
        if(rdcnt<=0)
          break;
        outf.write(buf, 0, rdcnt);
      }
      inf.close();
      outf.close();
    } catch (IOException e) {
      // TODO Auto-generated catch block
      e.printStackTrace();
    }
    Log.d(tag, "load ok...");
  }

  @Override
  public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
  }

  @Override
  public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
      return true;
    }
    return super.onOptionsItemSelected(item);
  }

  Bitmap getDecodedImage() {
    // ??, ????????? ???? ??? ????.
    String filename = getApplicationContext().getFilesDir()+"temp_img";
    BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true; // ==> ??? ???? ?? ?? ??? ?? ?? ??.
    BitmapFactory.decodeFile(filename, options);
    Log.d(tag, "picture real width=" + options.outWidth);
    Log.d(tag, "picture real height=" + options.outHeight);

    // ????? ??? ?????? ??? ??? ????.
    int rotation = ExifInterface.ORIENTATION_NORMAL;
    try {
      ExifInterface exif;
      exif = new ExifInterface(filename);
      rotation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION,
          ExifInterface.ORIENTATION_NORMAL);

    } catch (IOException e) {
      Log.e(tag, "### Error: fail exif...");
      e.printStackTrace();
    }
    Log.d(tag, "picture rotation = " + rotation);

    // ????? ????? ??????? ???? ?? ???????? ???? ??? ??????.
    int imgw, imgh;
    if (rotation == ExifInterface.ORIENTATION_ROTATE_90
        || rotation == ExifInterface.ORIENTATION_ROTATE_270) {
      imgw = options.outHeight;
      imgh = options.outWidth;
    } else {
      imgw = options.outWidth;
      imgh = options.outHeight;
    }

    // sampling ????? ????? ?????? ???? ?? inSampleSize? ????.
    // inSampleSize ? 2??? ?? ??? ??? ? ??.
    // sampling ????? ?? ?? ???? ?? ?? ??? ????????????? ??? ?? ???? ???? ? ??.
    int sx;
    int sy;
    ;
    int w, h;
    w = mImgView.getWidth();
    h = mImgView.getHeight();
    for (sx = 1; imgw / sx > mImgView.getWidth(); sx *= 2)
      ;
    for (sy = 1; imgh / sy > mImgView.getHeight(); sy *= 2)
      ;
    int sample_size = sx > sy ? sx : sy;
    Log.d(tag, "each samplesize x= " + sx + ", y=" + sy
        + ", result sample size = " + sample_size);
    options.inSampleSize = sample_size;

    // ?? ??? ??.
    options.inJustDecodeBounds = false;
    Bitmap bitmap = BitmapFactory.decodeFile(filename, options);
    if (bitmap != null) {
      float deg;
      switch (rotation) {
      case ExifInterface.ORIENTATION_ROTATE_90:
        deg = 90;
        break;
      case ExifInterface.ORIENTATION_ROTATE_180:
        deg = 180;
        break;
      case ExifInterface.ORIENTATION_ROTATE_270:
        deg = 270;
        break;
      default:
        deg = 0;
        break;
      }
      Log.d(tag, "rotation degree = " + deg);

      // ??????? ?? ???? ???? ?? ????? ????? ?? ?? ?? ???? ??.
      Matrix matrix = new Matrix();
      matrix.preRotate(deg);
      bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(),
          bitmap.getHeight(), matrix, false);
      return bitmap;

    } else {
      Log.d(tag, "### fail: decoding error...");
      return null;
    }
  }
}

Java Source Code List

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