如何检查是否有联系的图像？ [英] How to check if Contact has Image?

问题描述

我用这code指派给ImageView的联系人图片：

  mPhotoView =（ImageView的）findViewById（R.id.photo）;
mPhotoView.setImageURI（objItem.getPhotoUri（））;
 

如果该联系人有没有图像，这并没有什么，而不会引发错误。

在没有图像，我想补充一个默认的图像。所以，我需要检查或者在拍摄时添加到视图，或检查URI包含一些图像数据。

我如何做到这一点？

比我将设置默认的图像通过这样的：

  mPhotoView.setImageResource（R.drawable.ic_contact_picture_2）;
 

解决方案

如果您的目标设备运行的是Android 2.0 / 2.0.1 / 2.1，你将不得不查询<一个href="http://developer.android.com/reference/android/provider/ContactsContract.Data.html">ContactsContract.Data.CONTENT_URI一个选择，如：

  Data.MIMETYPE +=+ Photo.CONTENT_ITEM_TYPE
 

否则查询<一href="http://developer.android.com/reference/android/provider/Contacts.Photos.html">Contacts.Photos.CONTENT_URI

修改通过Pentium10

有关参考我在这里有我想出的方法（如果你仍然看到错误，更新）：

 公众开放的getPhotoUri（）{
    乌里人= ContentUris.withAppendedId（
            ContactsContract.Contacts.CONTENT_URI，的Long.parseLong（的getId（）））;
    乌里照片= Uri.withAppendedPath（人，
            ContactsContract.Contacts.Photo.CONTENT_DIRECTORY）;

    光标CUR = this.ctx
            .getContentResolver（）
            .query（
                    ContactsContract.Data.CONTENT_URI，
                    空值，
                    ContactsContract.Data.CONTACT_ID
                            +=
                            + this.getId（）
                            +和
                            + ContactsContract.Data.MIMETYPE
                            +=
                            + ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE
                            +'，NULL，NULL）;
    如果（CUR！= NULL）{
        如果（！cur.moveToFirst（））{
            返回null; //没有照片
        }
    } 其他 {
        返回null; //在光标过程中的错误
    }
    返回的照片;
}
 

I am assigning to an ImageView contacts images using this code:

mPhotoView = (ImageView) findViewById(R.id.photo);
mPhotoView.setImageURI(objItem.getPhotoUri());

If the contact has no image, this does nothing, and no error is raised.

When there is no image, I want to add a default image. So I need to check either if the image was added to the view, or check that the URI holds some image data

How do I achieve that?

Than I will set default image by this:

mPhotoView.setImageResource(R.drawable.ic_contact_picture_2);

解决方案

If your target device is running android 2.0/2.0.1/2.1 you will have to query ContactsContract.Data.CONTENT_URI with a selection like:

Data.MIMETYPE + "='" + Photo.CONTENT_ITEM_TYPE

Otherwise query Contacts.Photos.CONTENT_URI

Edit by Pentium10

For reference I include here the method I come up with (if you still see bugs, update it):

public Uri getPhotoUri() {
    Uri person = ContentUris.withAppendedId(
            ContactsContract.Contacts.CONTENT_URI, Long.parseLong(getId()));
    Uri photo = Uri.withAppendedPath(person,
            ContactsContract.Contacts.Photo.CONTENT_DIRECTORY);

    Cursor cur = this.ctx
            .getContentResolver()
            .query(
                    ContactsContract.Data.CONTENT_URI,
                    null,
                    ContactsContract.Data.CONTACT_ID
                            + "="
                            + this.getId()
                            + " AND "
                            + ContactsContract.Data.MIMETYPE
                            + "='"
                            + ContactsContract.CommonDataKinds.Photo.CONTENT_ITEM_TYPE
                            + "'", null, null);
    if (cur != null) {
        if (!cur.moveToFirst()) {
            return null; // no photo
        }
    } else {
        return null; // error in cursor process
    }
    return photo;
}

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