java - 使用 setImageURI 设置 Uri 时出现 OutOfMemoryError

Question

用户选择一个图像，图像的路径然后存储在我的 SQLite 数据库中。然后，我使用 CursorAdapter 在 GridView 中填充来自 SQLite 的文本/图像:

public class MyNiftyAdapter extends CursorAdapter{
private LayoutInflater mInflater;
private Cursor cur;

public MyNiftyAdapter(Context context, Cursor c) {
    super(context,c);
    this.mInflater = LayoutInflater.from(context);
    this.cur = c;
}
public MyNiftyAdapter(Context context, Cursor c, boolean autoRequery)
{
    super(context, c, autoRequery);
    this.mInflater = LayoutInflater.from(context);
    this.cur = c;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    ViewHolder viewHolder;
    if(convertView == null)
    {
        convertView = this.mInflater.inflate(R.layout.single_item, null);
        viewHolder = new ViewHolder();
        viewHolder.name = (TextView)convertView.findViewById(R.id.txtName);
        viewHolder.Age = (TextView)convertView.findViewById(R.id.studentage);
        viewHolder.Id = (TextView)convertView.findViewById(R.id.rowid);
        viewHolder.Image = (CircularImageView)convertView.findViewById(R.id.imgFood);
        convertView.setTag(viewHolder);
    }else
    {
        viewHolder = (ViewHolder)convertView.getTag();
    }
    this.cur.moveToPosition(position);

    viewHolder.name.setText(this.cur.getString(this.cur.getColumnIndex(SQLiteHelper.NAME)));
    viewHolder.Age.setText(this.cur.getString(this.cur.getColumnIndex(SQLiteHelper.AGE)));
    viewHolder.Id.setText(this.cur.getString(this.cur.getColumnIndex(SQLiteHelper._ID)));
    Uri jg = Uri.parse(this.cur.getString(this.cur.getColumnIndex("imagepath")));
    viewHolder.Image.setImageURI(jg);

    return convertView;
}

@Override
public void bindView(View view, Context context, Cursor cursor) {

}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
    // Dont need to do anything here
    return null;
}

static class ViewHolder
{
    TextView name;
    TextView Age;
    TextView Id;
    CircularImageView Image;
}
}

当我选择大图像时出现内存不足错误:

java.lang.OutOfMemoryError: 无法分配 21566748 字节的分配，8448604 空闲字节和 8MB 直到 OOM

我已经看到位图应该按比例缩小，但我只是使用文件的 Uri 并显示它。有没有办法避免这个问题，因为我不想将另一个(压缩的)文件保存到设备？

我已经在 list 中尝试了 android:hardwareAccelerated="false"。

---

这对我有用:

我最终使用了 picasso正如答案所建议的那样，但需要注意的重要一点是，当从设备加载 URI 时，加载 URI 是这样的:

Picasso.with(mContext)
            .load(new File(String.valueOf(Uri)))
            .placeholder(R.drawable.profile)
            .resize(800, 800)
            .centerCrop()
            .into(viewHolder.Image);

请注意，我使用了 .load(new File(String.valueOf(Uri))) 而不是 .load(uri)。如果您直接加载 URI， View 将返回空。

如果您从 url 加载图像，它应该像这样加载:

Picasso.with(mContext)
            .load(URL)
            .placeholder(R.drawable.profile)
            .resize(800, 800)
            .centerCrop()
            .into(viewHolder.Image);

所以我的适配器最终看起来像这样:

public class MyNiftyAdapter extends CursorAdapter{
private LayoutInflater mInflater;
private Cursor cur;
private Context mContext;

public MyNiftyAdapter(Context context, Cursor c) {
    super(context,c);
    this.mInflater = LayoutInflater.from(context);
    this.mContext = context;
    this.cur = c;
}
public MyNiftyAdapter(Context context, Cursor c, boolean autoRequery)
{
    super(context, c, autoRequery);
    this.mInflater = LayoutInflater.from(context);
    this.cur = c;
    this.mContext = context;
}
@Override
public View getView(int position, View convertView, ViewGroup parent)
{
    ViewHolder viewHolder;
    if(convertView == null)
    {
        convertView = this.mInflater.inflate(R.layout.single_item, null);
        viewHolder = new ViewHolder();
        viewHolder.name = (TextView)convertView.findViewById(R.id.txtName);
        viewHolder.Age = (TextView)convertView.findViewById(R.id.studentage);
        viewHolder.Id = (TextView)convertView.findViewById(R.id.rowid);
        viewHolder.Image = (CircularImageView)convertView.findViewById(R.id.imgFood);
        convertView.setTag(viewHolder);
    }else
    {
        viewHolder = (ViewHolder)convertView.getTag();
    }
    this.cur.moveToPosition(position);

    viewHolder.name.setText(this.cur.getString(this.cur.getColumnIndex(SQLiteHelper.NAME)));
    viewHolder.Age.setText(this.cur.getString(this.cur.getColumnIndex(SQLiteHelper.AGE)));
    viewHolder.Id.setText(this.cur.getString(this.cur.getColumnIndex(SQLiteHelper._ID)));
    Uri jg = Uri.parse(this.cur.getString(this.cur.getColumnIndex("imagepath")));

    Picasso.with(mContext)
            .load(new File(String.valueOf(jg)))
            .placeholder(R.drawable.profile)
            .resize(800, 800)
            .centerCrop()
            .into(viewHolder.Image);

    return convertView;
}

@Override
public void bindView(View view, Context context, Cursor cursor) {

}

@Override
public View newView(Context context, Cursor cursor, ViewGroup parent) {
    // Dont need to do anything here
    return null;
}

static class ViewHolder
{
    TextView name;
    TextView Age;
    TextView Id;
    CircularImageView Image;
}
}

谢谢大家的帮助。

Answer 1

您可以使用 Picasso 库来显示图像。

compile 'com.squareup.picasso:picasso:2.5.2'

在你的适配器中是这样的:

Uri jg = Uri.parse(this.cur.getString(this.cur.getColumnIndex("imagepath")));
Picasso.with(context).load(jg).into(viewHolder.Image);