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图像尺寸:4000*3000 像素
当图像加载时:4000*3000*4 = ?知识库
所以,Android设备的虚拟堆内存有:32 MB、64 MB、128 MB...等等
如果您使用:
<application
android:largeHeap="true">
</application>
这将增加 VHM 双倍(如果 32 MB = 2* 32 MB)。但这不是一个好方法,会影响操作系统
您需要减小图像的尺寸。
使用下面的类并传递图像的路径和宽度,高度你想要的
位图 bitmap = BitmapSize.getDecodedBitmap(path, 400, 400);
班级::::
public class BitmapSize{
public static Bitmap getDecodedBitmap(String path, float target_width, float target_height) {
Bitmap outBitmap = null;
try {
Options decode_options = new Options();
decode_options.inJustDecodeBounds = true;
BitmapFactory.decodeFile(path,decode_options); //This will just fill the output parameters
int inSampleSize = calculateInSampleSize(decode_options, target_width, target_height);
Options outOptions = new Options();
outOptions.inJustDecodeBounds = false;
outOptions.inSampleSize = inSampleSize;
outOptions.inPreferredConfig = Bitmap.Config.ARGB_8888;
outOptions.inScaled = false;
Bitmap decodedBitmap = BitmapFactory.decodeFile(path,outOptions);
outBitmap = Bitmap.createScaledBitmap(decodedBitmap,// (int)target_width, (int)target_height, true);
(int)((float)decodedBitmap.getWidth() / inSampleSize),
(int)((float)decodedBitmap.getHeight() / inSampleSize), true);
System.out.println("Decoded Bitmap: Width " + outBitmap.getWidth() + " Height = " + outBitmap.getHeight() + " inSampleSize = " + inSampleSize);
} catch (Exception e) {
// TODO: handle exception
}
return outBitmap;
}
public static int calculateInSampleSize(Options options, float reqWidth, float reqHeight) {
final int height = options.outHeight;
final int width = options.outWidth;
int inSampleSize = 1;
if (height > reqHeight || width > reqWidth) {
final int heightRatio = Math.round((float) height
/ (float) reqHeight);
final int widthRatio = Math.round((float) width / (float) reqWidth);
inSampleSize = heightRatio < widthRatio ? heightRatio : widthRatio;
}
return inSampleSize;
}
}