In the post "Load ImageView with JPG file in SD Card", the ImageView is loaded with bitmap in full-size. It cost too much resources for a mobile device, and easy to make the app closed unexpectly.
We can generate a shrinked bitmap using BitmapFactory.Optionswith inSampleSize; such that to reduce the needed resources greatly.
We can generate a shrinked bitmap using BitmapFactory.Optionswith inSampleSize; such that to reduce the needed resources greatly.
package com.AndroidLoadImageView; import android.app.Activity; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.os.Bundle; import android.widget.ImageView; public class AndroidLoadImageViewActivity extends Activity { String imagefile ="/sdcard/IMG_9331.JPG"; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); ImageView image = (ImageView)findViewById(R.id.image); //Bitmap bm = BitmapFactory.decodeFile(imagefile); Bitmap bm = ShrinkBitmap(imagefile, 300, 300); image.setImageBitmap(bm); } Bitmap ShrinkBitmap(String file, int width, int height){ BitmapFactory.Options bmpFactoryOptions = new BitmapFactory.Options(); bmpFactoryOptions.inJustDecodeBounds = true; Bitmap bitmap = BitmapFactory.decodeFile(file, bmpFactoryOptions); int heightRatio = (int)Math.ceil(bmpFactoryOptions.outHeight/(float)height); int widthRatio = (int)Math.ceil(bmpFactoryOptions.outWidth/(float)width); if (heightRatio > 1 || widthRatio > 1) { if (heightRatio > widthRatio) { bmpFactoryOptions.inSampleSize = heightRatio; } else { bmpFactoryOptions.inSampleSize = widthRatio; } } bmpFactoryOptions.inJustDecodeBounds = false; bitmap = BitmapFactory.decodeFile(file, bmpFactoryOptions); return bitmap; } }
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