如何使用getCropAndSetWallpaperIntent？

Question

我試圖使用getCropAndSetWallpaperIntent方法，但我得到一個錯誤。

這裏是我的代碼：

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); 

以下是我在我的日誌有：

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

你能幫助我嗎？

Answer 1

你要查詢MediaStore不使用「內容：//」協議，例如像這樣（代碼可以提高）：

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; 
}