erreur de dépassement de mémoire avec bitmap et une image en plein écran

Question

Je fais une galerie d'application. Il a travaillé, mais si lent et après que je clique dans certaines images, il est hors de faire une erreur de mémoire.

FullScreenImageAdapter.java

public class FullScreenImageAdapter extends PagerAdapter { 

private Activity _activity; 
private ArrayList<String> _imagePaths; 
private LayoutInflater inflater; 

// constructor 
public FullScreenImageAdapter(Activity activity, 
     ArrayList<String> imagePaths) { 
    this._activity = activity; 
    this._imagePaths = imagePaths; 
} 

@Override 
public int getCount() { 
    return this._imagePaths.size(); 
} 

@Override 
public boolean isViewFromObject(View view, Object object) { 
    return view == ((RelativeLayout) object); 
} 

@Override 
public Object instantiateItem(ViewGroup container, int position) { 
    TouchImageView imgDisplay; 
    Button btnClose; 

    inflater = (LayoutInflater) _activity 
      .getSystemService(Context.LAYOUT_INFLATER_SERVICE); 
    View viewLayout = inflater.inflate(R.layout.layout_fullscreen_image, container, 
      false); 

    imgDisplay = (TouchImageView) viewLayout.findViewById(R.id.imgDisplay); 
    btnClose = (Button) viewLayout.findViewById(R.id.btnClose); 

    BitmapFactory.Options options = new BitmapFactory.Options(); 
    options.inJustDecodeBounds = true; 
    //BitmapFactory.decodeFile(pathToImage, bmOptions); 
    int photoW = options.outWidth; 
    int photoH = options.outHeight; 
    int scaleFactor = Math.min(photoW/50, photoH/50); 

    options.inJustDecodeBounds = false; 
    options.inSampleSize = 8; 
    options.inPurgeable = true; 

    // options.inPreferredConfig = Bitmap.Config.ARGB_8888; 
    Bitmap bitmap = BitmapFactory.decodeFile(_imagePaths.get(position), options); 
    imgDisplay.setImageBitmap(bitmap); 

    // close button click event 

    ((ViewPager) container).addView(viewLayout); 

    return viewLayout; 
} 

@Override 
public void destroyItem(ViewGroup container, int position, Object object) { 
    ((ViewPager) container).removeView((RelativeLayout) object); 

} 

}

public class FullScreenViewActivity extends Activity{ 

private Utils utils; 
private FullScreenImageAdapter adapter; 
private ViewPager viewPager; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_fullscreen_view); 

    viewPager = (ViewPager) findViewById(R.id.pager); 

    utils = new Utils(getApplicationContext()); 

    Intent i = getIntent(); 
    int position = i.getIntExtra("position", 0); 

    adapter = new FullScreenImageAdapter(FullScreenViewActivity.this, 
      utils.getFilePaths()); 

    viewPager.setAdapter(adapter); 

    // displaying selected image first 
    viewPager.setCurrentItem(position); 
    //adapter.destroyItem(viewPager,position,i); 


} 

}

GridViewActivity

public class GridViewActivity extends Activity { 

private Utils utils; 
private ArrayList<String> imagePaths = new ArrayList<String>(); 
private GridViewImageAdapter adapter; 
private GridView gridView; 
private int columnWidth; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_grid_view); 

    gridView = (GridView) findViewById(R.id.grid_view); 

    utils = new Utils(this); 

    // Initilizing Grid View 
    InitilizeGridLayout(); 

    // loading all image paths from SD card 
    imagePaths = utils.getFilePaths(); 

    // Gridview adapter 
    adapter = new GridViewImageAdapter(GridViewActivity.this, imagePaths, 
      columnWidth); 

    // setting grid view adapter 
    gridView.setAdapter(adapter); 
} 

private void InitilizeGridLayout() { 
    Resources r = getResources(); 
    float padding = TypedValue.applyDimension(TypedValue.COMPLEX_UNIT_DIP, 
      AppConstant.GRID_PADDING, r.getDisplayMetrics()); 

    columnWidth = (int) ((utils.getScreenWidth() - ((AppConstant.NUM_OF_COLUMNS + 1) * padding))/AppConstant.NUM_OF_COLUMNS); 

    gridView.setNumColumns(AppConstant.NUM_OF_COLUMNS); 
    gridView.setColumnWidth(columnWidth); 
    gridView.setStretchMode(GridView.NO_STRETCH); 
    gridView.setPadding((int) padding, (int) padding, (int) padding, 
      (int) padding); 
    gridView.setHorizontalSpacing((int) padding); 
    gridView.setVerticalSpacing((int) padding); 
} 

}

-

public class GridViewImageAdapter extends BaseAdapter { 

private Activity _activity; 
private ArrayList<String> _filePaths = new ArrayList<String>(); 
private int imageWidth; 

public GridViewImageAdapter(Activity activity, ArrayList<String> filePaths, 
     int imageWidth) { 
    this._activity = activity; 
    this._filePaths = filePaths; 
    this.imageWidth = imageWidth; 
} 

@Override 
public int getCount() { 
    return this._filePaths.size(); 
} 

@Override 
public Object getItem(int position) { 
    return this._filePaths.get(position); 
} 

@Override 
public long getItemId(int position) { 
    return position; 
} 

@Override 
public View getView(int position, View convertView, ViewGroup parent) { 
    ImageView imageView; 
    if (convertView == null) { 
     imageView = new ImageView(_activity); 
    } else { 
     imageView = (ImageView) convertView; 
    } 

    // get screen dimensions 
    Bitmap image = decodeFile(_filePaths.get(position), imageWidth, 
      imageWidth); 


    imageView.setScaleType(ImageView.ScaleType.CENTER_CROP); 
    imageView.setLayoutParams(new GridView.LayoutParams(imageWidth, 
      imageWidth)); 
    imageView.setImageBitmap(image); 



    // image view click listener 
    imageView.setOnClickListener(new OnImageClickListener(position)); 

    return imageView; 
} 

class OnImageClickListener implements OnClickListener { 

    int _postion; 

    // constructor 
    public OnImageClickListener(int position) { 
     this._postion = position; 
    } 

    @Override 
    public void onClick(View v) { 
     // on selecting grid view image 
     // launch full screen activity 
     Intent i = new Intent(_activity, FullScreenViewActivity.class); 
     i.putExtra("position", _postion); 
     _activity.startActivity(i); 
    } 

} 

/* 
* Resizing image size 
*/ 
public static Bitmap decodeFile(String filePath, int WIDTH, int HIGHT) { 
    try { 

     File f = new File(filePath); 

     BitmapFactory.Options o = new BitmapFactory.Options(); 
     o.inJustDecodeBounds = true; 
     BitmapFactory.decodeStream(new FileInputStream(f), null, o); 

     final int REQUIRED_WIDTH = WIDTH; 
     final int REQUIRED_HIGHT = HIGHT; 
     int scale = 1; 
     while (o.outWidth/scale/2 >= REQUIRED_WIDTH 
       && o.outHeight/scale/2 >= REQUIRED_HIGHT) 
      scale *= 2; 

     BitmapFactory.Options o2 = new BitmapFactory.Options(); 
     o2.inSampleSize = scale; 
     return BitmapFactory.decodeStream(new FileInputStream(f), null, o2); 
    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    } 
    return null; 
} 

}

Ainsi, le gridview est si lent et après cliquez sur certaines images, les fullsecreenImageView je sortirai d'erreur de mémoire

Answer 1

envisager de passer à l'aide de glissement pour le chargement d'images - https://github.com/bumptech/glide

Il se chargera de la mise en cache et de la mémoire pour vous.