Android 获得最近一张拍照或截屏图片

类型微信那种，拍了一张照片或者截了屏 点击聊天加号 就会有个 弹框询问是否要发送那张图片；这里只是做了获取那张最新图片的代码，没有判断时间间隔

Kotlin版

/** * Created by JokAr on 2017/10/16. */object ImageUtil {    /**     * 返回相册或截屏中最新的一张图片     */    fun getLatestPhoto(context: Context): Pair<Long, String>? {        //拍摄照片的地址        val CAMERA_IMAGE_BUCKET_NAME = Environment.getExternalStorageDirectory().toString() + "/DCIM/Camera"        //截屏照片的地址        val SCREENSHOTS_IMAGE_BUCKET_NAME = getScreenshotsPath()        //拍摄照片的地址ID        val CAMERA_IMAGE_BUCKET_ID = getBucketId(CAMERA_IMAGE_BUCKET_NAME)        //截屏照片的地址ID        val SCREENSHOTS_IMAGE_BUCKET_ID = getBucketId(SCREENSHOTS_IMAGE_BUCKET_NAME)        //查询路径和修改时间        val projection = arrayOf(MediaStore.Images.Media.DATA,                MediaStore.Images.Media.DATE_MODIFIED)        val selection = MediaStore.Images.Media.BUCKET_ID + " = ?"        val selectionArgs = arrayOf(CAMERA_IMAGE_BUCKET_ID)        val selectionArgsForScreenshots = arrayOf(SCREENSHOTS_IMAGE_BUCKET_ID)        var cameraPair: Pair<Long, String>? = null        //检查camera文件夹，查询并排序        var cursor = context.contentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,                projection,                selection,                selectionArgs,                MediaStore.Files.FileColumns.DATE_MODIFIED + " DESC")        if (cursor.moveToFirst()) {            cameraPair = Pair(cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media.DATE_MODIFIED)),                    cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)))        }        //检查Screenshots文件夹        var screenshotsPair: Pair<Long, String>? = null        //查询并排序        cursor = context.contentResolver.query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,                projection,                selection,                selectionArgsForScreenshots,                MediaStore.Files.FileColumns.DATE_MODIFIED + " DESC")        if (cursor.moveToFirst()) {            screenshotsPair = Pair(cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media.DATE_MODIFIED)),                    cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)))        }        if (!cursor.isClosed) {            cursor.close()        }        //对比        if (cameraPair != null && screenshotsPair != null) {            return if (cameraPair.first!! > screenshotsPair.first!!) {                screenshotsPair = null                cameraPair            } else {                cameraPair = null                screenshotsPair            }        } else if (cameraPair != null && screenshotsPair == null) {            return cameraPair        } else if (cameraPair == null && screenshotsPair != null) {            return screenshotsPair        }        return null    }    private fun getBucketId(path: String): String {        return path.toLowerCase().hashCode().toString()    }     /**     * 获取截图路径     */    private fun getScreenshotsPath(): String {        var path = Environment.getExternalStorageDirectory().toString() + "/DCIM/Screenshots"        var file: File? = File(path)        if (!file?.exists()!!) {            path = Environment.getExternalStorageDirectory().toString() + "/Pictures/Screenshots"        }        file = null        return path    }}

Java版

  /**     * 获取相册中最新一张图片     *     * @param context     * @return     */    public static Pair<Long, String> getLatestPhoto(Context context) {        //拍摄照片的地址        String CAMERA_IMAGE_BUCKET_NAME = Environment.getExternalStorageDirectory().toString() + "/DCIM/Camera";        //截屏照片的地址        String SCREENSHOTS_IMAGE_BUCKET_NAME = getScreenshotsPath();        //拍摄照片的地址ID        String CAMERA_IMAGE_BUCKET_ID = getBucketId(CAMERA_IMAGE_BUCKET_NAME);        //截屏照片的地址ID        String SCREENSHOTS_IMAGE_BUCKET_ID = getBucketId(SCREENSHOTS_IMAGE_BUCKET_NAME);        //查询路径和修改时间        String[] projection = {MediaStore.Images.Media.DATA,                MediaStore.Images.Media.DATE_MODIFIED};        //        String selection = MediaStore.Images.Media.BUCKET_ID + " = ?";        //        String[] selectionArgs = {CAMERA_IMAGE_BUCKET_ID};        String[] selectionArgsForScreenshots = {SCREENSHOTS_IMAGE_BUCKET_ID};        //检查camera文件夹，查询并排序        Pair<Long, String> cameraPair = null;        Cursor cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,                projection,                selection,                selectionArgs,                MediaStore.Files.FileColumns.DATE_MODIFIED + " DESC");        if (cursor.moveToFirst()) {            cameraPair = new Pair(cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media.DATE_MODIFIED)),                    cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)));        }        //检查Screenshots文件夹        Pair<Long, String> screenshotsPair = null;        //查询并排序        cursor = context.getContentResolver().query(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,                projection,                selection,                selectionArgsForScreenshots,                MediaStore.Files.FileColumns.DATE_MODIFIED + " DESC");        if (cursor.moveToFirst()) {            screenshotsPair = new Pair(cursor.getLong(cursor.getColumnIndex(MediaStore.Images.Media.DATE_MODIFIED)),                    cursor.getString(cursor.getColumnIndex(MediaStore.Images.Media.DATA)));        }        if (!cursor.isClosed()) {            cursor.close();        }        //对比        if (cameraPair != null && screenshotsPair != null) {            if (cameraPair.first > screenshotsPair.first) {                screenshotsPair = null;                return cameraPair;            } else {                cameraPair = null;                return screenshotsPair;            }        } else if (cameraPair != null && screenshotsPair == null) {            return cameraPair;        } else if (cameraPair == null && screenshotsPair != null) {            return screenshotsPair;        }        return null;    } private static String getBucketId(String path) {        return String.valueOf(path.toLowerCase().hashCode());    } /**     * 获取截图路径     * @return     */    public static String getScreenshotsPath(){        String path = Environment.getExternalStorageDirectory().toString() + "/DCIM/Screenshots";        File file = new File(path);        if(!file.exists()){            path = Environment.getExternalStorageDirectory().toString() + "/Pictures/Screenshots";        }        file = null;        return path;    }