我让用户选择背景,用户可以从我带应用程序的列表中的图库或图片中选择自己的图片。我将此图片保存到FileOutputStream。但是,我的应用程序变得非常慢,我正在使用以下功能;Android处理大图像
//When user picks from gallery
public void save(Bitmap bitmapImage) {
bitmapImage = scaleBitmap(bitmapImage);
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(createFile());
bitmapImage.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (fileOutputStream != null) {
fileOutputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
//When user picks from list and I load from drawables
public void save(int resId) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = IMAGE_IN_SAMPLE_SIZE;
options.inScaled = false;
options.inJustDecodeBounds = false;
Bitmap bitmapImage = BitmapFactory.decodeResource(context.getResources(), resId, options);
FileOutputStream fileOutputStream = null;
try {
fileOutputStream = new FileOutputStream(createFile());
bitmapImage.compress(Bitmap.CompressFormat.PNG, 100, fileOutputStream);
} catch (Exception e) {
e.printStackTrace();
} finally {
try {
if (fileOutputStream != null) {
fileOutputStream.close();
}
} catch (IOException e) {
e.printStackTrace();
}
}
}
如何让这些功能更快?
我也得到这个消息:
06-15 12:02:58.884 22320-22320/com I/dalvikvm-heap: Grow heap (frag case) to 15.172MB for 2073616-byte allocation
06-15 12:03:00.716 22320-22320/com I/dalvikvm-heap: Grow heap (frag case) to 15.149MB for 2073616-byte allocation
06-15 12:03:03.129 22320-22320/com I/Choreographer: Skipped 145 frames! The application may be doing too much work on its main thread.
考虑使用滑翔 – EpicPandaForce
的[应用程序可以做它的主线程的工作太多了]可能的复制(https://stackoverflow.com/questions/14678593/the-application-可能会做太多的工作在其主线程) – user3802077
我想使用滑翔,但我怎样才能保存一个图像滑动到文件? – tomhogenkamp