英文:
How can I completely clear a bitmap from memory on Android?
问题
这段代码中，我只是有一个位图（bitmap），我用它来赋值给一个静态变量。我没有将其设置为任何ImageView。在将其赋值给静态变量之后，我想通过键入bitmap.recycle()来从内存中删除它。当我只使用bitmap.recycle()这一行时，我不会得到错误，但是当我尝试切换到另一页时，会出现错误。
这段代码没有错误：
StaticVeriables.getScannedFromGallery = bitmap;
bitmap.recycle();
//Intent gallery1 = new Intent(MainActivity.this, EditImage.class);
//gallery1.putExtra("isGallery", true);
//startActivity(gallery1);
//finish();
这段代码中有一个错误：
StaticVeriables.getScannedFromGallery = bitmap;
bitmap.recycle();
Intent gallery1 = new Intent(MainActivity.this, EditImage.class);
gallery1.putExtra("isGallery", true);
startActivity(gallery1);
finish();
英文:
I just have a bitmap that I use to assign to a static variable. I did not set this to any imageview. After assigning it to a static variable, I want to delete it from memory by typing bitmap.recycle (). I don't get an error when I just use the bitmap.recycle () line, but when I try to switch to a different page, I get an error.
This code has no errors:
StaticVeriables.getScannedFromGallery=bitmap;
bitmap.recycle();
//Intent gallery1 = new Intent(MainActivity.this, EditImage.class);
//gallery1.putExtra("isGallery",true);
//startActivity(gallery1);
//finish();
There is an error in this code:
StaticVeriables.getScannedFromGallery=bitmap;
bitmap.recycle();
Intent gallery1 = new Intent(MainActivity.this, EditImage.class);
gallery1.putExtra("isGallery",true);
startActivity(gallery1);
finish();
答案1
得分: 0
我解决了这个问题。这与切换到另一个活动无关。由于我在前一行将位图分配给了我的静态变量，所以当我写入bitmap.recycle()时，我得到了一个错误，因为这个位图是一个引用静态变量，并且我在其他类中使用了这个静态变量。我通过将我的位图变量复制到静态变量中来解决了这个问题。在那之中：
//我用这行代码解决了我的问题
StaticVeriables.getScannedFromGallery = bitmap.copy(bitmap.getConfig(), true);
/*我们不应该这样做
StaticVeriables.getScannedFromGallery = bitmap;*/
bitmap.recycle();
Intent gallery1 = new Intent(MainActivity.this, EditImage.class);
gallery1.putExtra("isGallery", true);
startActivity(gallery1);
finish();
英文:
I solved this problem. It wasn't about switching to another activity. Since I assigned the bitmap to my static variable in the previous line, when I wrote bitmap.recycle (), I got an error because this bitmap is a reference static variable and I used this static variable in other classes. I solved this problem by copying my bitmap variable to my static variable. In that:
//I solved my problem with this line
StaticVeriables.getScannedFromGallery=bitmap.copy(bitmap.getConfig(),true);
/*Whe should not do this
StaticVeriables.getScannedFromGallery=bitmap;*/
bitmap.recycle();
Intent gallery1 = new Intent(MainActivity.this, EditImage.class);
gallery1.putExtra("isGallery",true);
startActivity(gallery1);
finish();
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