Android 图片文件和Bitmap之间的转换

时间:2021-03-22 17:39:24
String filePath="c:/01.jpg";
Bitmap bitmap=BitmapFactory.decodeFile(filePath);

如果图片过大,可能导致Bitmap对象装不下图片
解决办法:

String filePath="c:/01.jpg";
Bitmap bitmap=BitmapFactory.decodeFile(filePath,getBitmapOption()); //将图片的长和宽缩小味原来的1/2 private Options getBitmapOption(int inSampleSize){
System.gc();
BitmapFactory.Options options = new BitmapFactory.Options();
options.inPurgeable = true;
options.inSampleSize = inSampleSize;
return options;
}

Bitmap对象保存味图片文件

public void saveBitmapFile(Bitmap bitmap){
File file=new File("/mnt/sdcard/pic/01.jpg");//将要保存图片的路径
try {
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(file));
bitmap.compress(Bitmap.CompressFormat.JPEG, , bos);
bos.flush();
bos.close();
} catch (IOException e) {
e.printStackTrace();
}
}