这是我的代码：
public void onPictureTaken(byte[] data,Camera camera) {
Bitmap foto = BitmapFactory.decodeByteArray(data,data.length);
wid = foto.getWidth();
hgt = foto.getHeight();
Bitmap newImage = Bitmap.createBitmap(wid,hgt,Bitmap.Config.ARGB_4444);
Canvas canvas = new Canvas(newImage);
canvas.drawBitmap(foto,0f,null);
if (newImage.getWidth() > newImage.getHeight()) {
Matrix matrix = new Matrix();
matrix.postRotate(90);
newImage.createBitmap(newImage,wid,matrix,true);
}
}
这是我的错误：
FATAL EXCEPTION: main java.lang.OutOfMemoryError at android.graphics.Bitmap.nativeCreate(Native Method) at android.graphics.Bitmap.createBitmap(Bitmap.java:689) at android.graphics.Bitmap.createBitmap(Bitmap.java:666) at android.graphics.Bitmap.createBitmap(Bitmap.java:633) at com.supratecnologia.activity.Camera_Activity.onPictureTaken(Camera_Activity.java:189) at android.hardware.Camera$EventHandler.handleMessage(Camera.java:768) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5041) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:511) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) at dalvik.system.NativeStart.main(Native Method)
解决方法
由于大位图超过了VM堆的限制,因此需要缩小图像或降低图像质量.
要缩放图像,请使用BitmapFactory.Options.
Bitmap bm = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inSampleSize = 5;
AssetFileDescriptor fileDescriptor =null;
try {
fileDescriptor = this.getContentResolver().openAssetFileDescriptor(selectedImage,”r”);
} catch (FileNotFoundException e) {
e.printStackTrace();
}
finally{
try {
bm = BitmapFactory.decodeFileDescriptor(fileDescriptor.getFileDescriptor(),null,options);
fileDescriptor.close();
} catch (IOException e) {
e.printStackTrace();
}
}
或者使用Bitmap.compress()来降低图像质量.
并且您还可以按照此conversation以避免在位图中加载图像时出现内存错误.
