如何处理android java中的bad_alloc

Question

我正在使用ViewPager 来显示片段。当我多次刷它时，它会出现以下错误：

E/libc++abi: terminating with uncaught exception of type std::bad_alloc: std::bad_alloc
--------- beginning of crash
A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 6900

我正在显示和缓存图像 (using this) 以及我正在使用 TextView 在 Fragment 上显示文本。
我试图从其他链接获得帮助，但未能成功。

Answer 1

我试图在我这边复制您的问题，但是我没有收到错误，但没有加载图像。但是这些文件被缓存在我的内部存储中。顺便说一句，在您的情况下，建议使用Picasso 或Universal Image Loader，因为这些库将处理加载、缓存甚至错误。这可能不是您问题的直接解决方案，但以防万一您正在寻找替代方案，您可以尝试此解决方案。

为了简单起见，我使用的是毕加索。我创建了一个示例项目，以防您需要参考。你需要在你的gradle依赖中添加compile 'com.squareup.picasso:picasso:2.5.2'；

1) 片段

public class FragmentImage extends Fragment {

private TextView imageName;
private ImageView image;

public static final String IMAGE_URL = "link";
public static final String POSITION = "position";

private String url = null;
private int position = 0;

public static FragmentImage newInstance(String link, int position) {
    // Required empty public constructor
    FragmentImage fragmentImage = new FragmentImage();
    Bundle bundle = new Bundle();
    bundle.putString(IMAGE_URL, link);
    bundle.putInt(POSITION, position);
    fragmentImage.setArguments(bundle);
    return fragmentImage;
}

@Override
public void onCreate(@Nullable Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    if(null != getArguments()){
        url = getArguments().getString(IMAGE_URL);
        position = getArguments().getInt(POSITION);
    }
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    return inflater.inflate(R.layout.fragment_fragment_image, container, false);
}

@Override
public void onViewCreated(View view, @Nullable Bundle savedInstanceState) {
    super.onViewCreated(view, savedInstanceState);

    image = (ImageView)view.findViewById(R.id.image);
    imageName = (TextView)view.findViewById(R.id.imageName);

    imageName.setText("Position "+position);
    Picasso.with(getActivity())
            .load(url)
            .placeholder(R.mipmap.ic_launcher)
            .error(R.mipmap.ic_launcher)
            .into(image);
}
}

2) 片段适配器

public class FragmentImagePager extends FragmentPagerAdapter {

private String[] imageUrls = {"https://www.ricoh.com/r_dc/caplio/r7/img/sample_04.jpg",
"http://i-cdn.phonearena.com/images/articles/47012-image/photo2.jpg",
"http://www.flooringvillage.co.uk/ekmps/shops/flooringvillage/images/request-a-sample--547-p.jpg",
"http://www.cameraegg.org/wp-content/uploads/2013/03/Canon-EOS-100D-Rebel-SL1-Sample-Image.jpg",
"http://imgsv.imaging.nikon.com/lineup/lens/singlefocal/wide/af-s_35mmf_14g/img/sample/sample4_l.jpg"};

public FragmentImagePager(FragmentManager fm) {
    super(fm);
}

@Override
public Fragment getItem(int position) {
    return FragmentImage.newInstance(imageUrls[position], position);
}

@Override
public int getCount() {
    return imageUrls.length;
}
}

3) 活动

public class MainActivity extends AppCompatActivity{

private ViewPager fragmentList;
private FragmentImagePager fragmentImagePager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    fragmentList = (ViewPager)findViewById(R.id.fragmentList);
    fragmentImagePager = new FragmentImagePager(getSupportFragmentManager());
    fragmentList.setAdapter(fragmentImagePager);
    fragmentList.setOffscreenPageLimit(fragmentImagePager.getCount());

}
}