解決了OOM的問題

標籤：public   return   false   圖片   

public class ImageUtils

{

/**

* 從SDCard讀取圖片時壓縮

* 

* @param srcPath

* @return

*/

public static Bitmap compressImageFromFile(String srcPath,

float ww, float hh )

{

BitmapFactory.Options newOpts = new BitmapFactory.Options();

newOpts.inJustDecodeBounds = true;// 唯讀邊,不讀內容

Bitmap bitmap = BitmapFactory.decodeFile(srcPath, newOpts);

newOpts.inJustDecodeBounds = false;

int w = newOpts.outWidth;

int h = newOpts.outHeight;

//float hh = 800f;//

//float ww = 480f;//

int be = 1;

// 縮放到可以在480x800的螢幕上完整顯示圖片

if (w >= h && w >= ww)

{

be = (int) (newOpts.outWidth / ww);

} else if (w < h && h > hh)

{

be = (int) (newOpts.outHeight / hh);

}

if (be <= 0)

be = 1;

newOpts.inSampleSize = be;// 設定採樣率

newOpts.inPreferredConfig = Config.ARGB_8888;// 該模式是預設的,可不設

newOpts.inPurgeable = true;// 同時設定才會有效

newOpts.inInputShareable = true;// 。當系統記憶體不夠時候圖片自動被回收

bitmap = BitmapFactory.decodeFile(srcPath, newOpts);

return bitmap;

}

/**

* 將圖片在記憶體中壓縮

* 

* @param image

* @return

*/

public static Bitmap compressBmpFromBmp(Bitmap image)

{

ByteArrayOutputStream baos = new ByteArrayOutputStream();

int options = 100;

image.compress(Bitmap.CompressFormat.JPEG, 100, baos);

// 壓縮到剛好小於100kb為止

while (baos.toByteArray().length / 1024 > 100)

{

baos.reset();

options -= 10;

image.compress(Bitmap.CompressFormat.JPEG, options, baos);

}

ByteArrayInputStream isBm = new ByteArrayInputStream(baos.toByteArray());

Bitmap bitmap = BitmapFactory.decodeStream(isBm, null, null);

return bitmap;

}

}

本文出自 “android技術” 部落格，請務必保留此出處http://340431827.blog.51cto.com/9096201/1533220