谷歌地图自定义标记内存不足错误(API V2) [英] Google Map custom Marker Out of Memory Error (API V2)
问题描述
我用下面的code设置标志在他/她的画廊用户自身的形象。但我得到了内存不足的错误所有的时间,所以我想我的实现是错误的。另一个有趣的行为我发现的是,如果该标记不处于图,该错误不会立即发生。但是,一旦我将摄像机移动到该标记为错误再次出现。 (总之,我永远不会有机会看到我的形象)
I'm using the following code to set marker with user's own image in his/her gallery. But I get out of memory error all the time so I guess my implementation is wrong. Another interesting behavior I found is that if the marker isn't in the view, the error doesn't occur immediately. But once I move the camera to where that marker is the error appears again. (In short, I never get a chance to see my image)
codeS我使用的:
Codes I use:
//on button click, send user to gallery to choose image he/she wants to use
changeAvatarButton.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
Intent i = new Intent(
Intent.ACTION_PICK,
android.provider.MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(i, 1);
}
});
//use the selected image for marker icon
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == 1 && resultCode == RESULT_OK && null != data) {
Uri selectedImage = data.getData();
String[] filePathColumn = { MediaStore.Images.Media.DATA };
Cursor cursor = getContentResolver().query(selectedImage,
filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
cursor.close();
// BitmapDescriptorFactory
myIcon.setIcon(BitmapDescriptorFactory
.fromPath(picturePath));
}
}
logcat的错误:E / dalvikvm堆(5809):内存不足。在16777232字节分配
logcat error: E/dalvikvm-heap(5809): Out of memory on a 16777232-byte allocation.
在调试更改picturePath到已知路径,如/mnt/sdcard/DCIM/Camera/IMG_20121214.jpg但错误是一样的。
When debugging I change picturePath to a known path such as "/mnt/sdcard/DCIM/Camera/IMG_20121214.jpg" but the error is the same.
在此先感谢:)
推荐答案
德code和规模的图像之前加载到内存中,只是改变横向和纵向到你真正想要的大小
decode and scale image before loaded into memory,just change landscape and portrait to the size you actually want
BitmapFactory.Options options = new BitmapFactory.Options();
options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path, options);
int imageHeight = options.outHeight;
int imageWidth = options.outWidth;
String imageType = options.outMimeType;
if(imageWidth > imageHeight) {
options.inSampleSize = calculateInSampleSize(options,512,256);//if landscape
} else{
options.inSampleSize = calculateInSampleSize(options,256,512);//if portrait
}
options.inJustDecodeBounds = false;
bitmap = BitmapFactory.decodeFile(path,options);
办法计算尺寸
method for calculating size
public static int calculateInSampleSize(
BitmapFactory.Options options, int reqWidth, int reqHeight) {
// Raw height and width of image
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
// Calculate ratios of height and width to requested height and width
final int heightRatio = Math.round((float) height / (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
// Choose the smallest ratio as inSampleSize value, this will guarantee
// a final image with both dimensions larger than or equal to the
// requested height and width.
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
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