如何使用getCropAndSetWallpaperIntent？ [英] How to use getCropAndSetWallpaperIntent?

问题描述

我试图用getCropAndSetWallpaperIntent方法，但我得到了一个错误。

I tried to use getCropAndSetWallpaperIntent method but I got an error.

下面是我的code：

Uri uri = Uri.parse("content://" + getFilesDir() + "/"+ image.path);
ContentResolver contentResolver = getContentResolver();
contentResolver.getType(uri); // Type is null
Intent intent = wallpaperManager.getCropAndSetWallpaperIntent(uri);
intent.setType("image/*");
startActivityForResult(intent, 42);

下面是我在我的日志有：

Here is what I got in my logs :

java.lang.IllegalArgumentException: Cannot use passed URI to set wallpaper; check that the type returned by ContentProvider matches image/*

你能帮助我吗？

推荐答案

您要查询MediaStore不使用的内容：//协议，比如像这样（code可以改善）：

You have to query the MediaStore without using the "content://" protocol, for instance like this (code can be improved):

String[] paths = {"/example.png"};
final String[] FIELDS = { MediaStore.MediaColumns._ID };
// Images
Uri uri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;
Cursor ca = context.getContentResolver().query(uri, FIELDS, MediaStore.MediaColumns.DATA + "=?", paths, null);
for (ca.moveToFirst(); !ca.isAfterLast(); ca.moveToNext()) {
   int id = ca.getInt(ca.getColumnIndex(MediaStore.MediaColumns._ID));
   uri = ContentUris.withAppendedId(MediaStore.Images.Media.EXTERNAL_CONTENT_URI, id);
   found = true; 
}
ca.close();

if (found) {
   return uri;
}

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