如何找到联系人图像支持的最大图像尺寸? [英] How to find the max image size supported for contacts images?

问题描述

从果冻豆(4.1)开始，Android现在支持

starting with jelly bean (4.1), android now supports contact images that are 720x720 .

之前，从ICS(4.0)开始，android已支持256x256 .

before, starting with ICS (4.0), android has supported contact images that are 256x256.

在此之前，联系人照片的大小仅为缩略图-96x96

and before that, contact photos had just a size of a thumbnail - 96x96

API中是否有任何函数可以返回联系人图像的最大大小?

is there any function in the API that returns the max size of the contact image?

我还希望制造商不要更改最大图像尺寸，即使他们做了并且我们有这样的功能，它也会为我们返回正确的尺寸.

i also hope that the manufacturers didn't change the max image sizes, and even if they did and we have such a function, it would return us the correct size.

推荐答案

根据

according to this link, the correct way to get the max size is:

@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
public static int getMaxContactPhotoSize(final Context context) {
    if (VERSION.SDK_INT >= VERSION_CODES.ICE_CREAM_SANDWICH) {
        // Note that this URI is safe to call on the UI thread.
        final Uri uri = ContactsContract.DisplayPhoto.CONTENT_MAX_DIMENSIONS_URI;
        final String[] projection = new String[] { ContactsContract.DisplayPhoto.DISPLAY_MAX_DIM };
        final Cursor c = context.getContentResolver().query(uri, projection, null, null, null);
        try {
            c.moveToFirst();
            return c.getInt(0);
        } finally {
            c.close();
        }
    }
    // fallback: 96x96 is the max contact photo size for pre-ICS versions
    return 96;
}

---

如果我们至少使用API​​ 16(4.1)，则可以使用类似的内容:

---

if we use at least API 16 (4.1), it's possible to use something like:

@AnyThread
@RequiresPermission(anyOf = [Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS])
@TargetApi(Build.VERSION_CODES.ICE_CREAM_SANDWICH)
fun getMaxContactPhotoSize(context: Context): Int {
    // Note that this URI is safe to call on the UI thread.
    if (contactMaxPhotoSize > 0)
        return contactMaxPhotoSize
    val uri = ContactsContract.DisplayPhoto.CONTENT_MAX_DIMENSIONS_URI
    val projection = arrayOf(ContactsContract.DisplayPhoto.DISPLAY_MAX_DIM)
    context.contentResolver.query(uri, projection, null, null, null)?.use { cursor ->
        cursor.moveToFirst()
        contactMaxPhotoSize = cursor.getInt(0)
    }
    if (contactMaxPhotoSize > 0)
        return contactMaxPhotoSize
    // fallback: 720x720 is the max contact photo size for 4.1 version
    contactMaxPhotoSize = 720
    return contactMaxPhotoSize
}

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