分享实现Android图片选择的两种方式

private static final int PICTURE = 10086; //requestcodeIntent intent = new Intent();if (Build.VERSION.SDK_INT < 19) {//因为Android SDK在4.4版本后图片action变化了 所以在这里先判断一下      intent.setAction(Intent.ACTION_GET_CONTENT);    } else {      intent.setAction(Intent.ACTION_OPEN_DOCUMENT);    }    intent.setType("image/*");    intent.addCategory(Intent.CATEGORY_OPENABLE);startActivityForResult(intent, PICTURE);

@Override  protected void onActivityResult(int requestCode, int resultCode, Intent data) {    if (data == null) {      this.finish();      return;    }    Uri uri = data.getData();    switch (requestCode) {      case PICTURE:        image = FileUtils.getUriPath(this, uri); //（因为4.4以后图片uri发生了变化）通过文件工具类 对uri进行解析得到图片路径        break;      default:        break;    }    this.finish();  }

public class FileUtils {  private static final String TAG = "FileUtils";  private static final boolean DEBUG = false;  /**   * 获取可读的文件大小   */  public static String getReadableFileSize(int size) {    final int BYTES_IN_KILOBYTES = 1024;    final DecimalFormat dec = new DecimalFormat("###.#");    final String KILOBYTES = " KB";    final String MEGABYTES = " MB";    final String GIGABYTES = " GB";    float fileSize = 0;    String suffix = KILOBYTES;    if(size > BYTES_IN_KILOBYTES) {      fileSize = size / BYTES_IN_KILOBYTES;      if(fileSize > BYTES_IN_KILOBYTES) {        fileSize = fileSize / BYTES_IN_KILOBYTES;        if(fileSize > BYTES_IN_KILOBYTES) {          fileSize = fileSize / BYTES_IN_KILOBYTES;          suffix = GIGABYTES;        } else {          suffix = MEGABYTES;        }      }    }    return String.valueOf(dec.format(fileSize) + suffix);  }  /**   * 获取文件的文件名(不包括扩展名)   */  public static String getFileNameWithoutExtension(String path) {    if(path == null) {      return null;    }    int separatorIndex = path.lastIndexOf(File.separator);    if(separatorIndex < 0) {      separatorIndex = 0;    }    int dotIndex = path.lastIndexOf(".");    if(dotIndex < 0) {      dotIndex = path.length();    } else if(dotIndex < separatorIndex) {      dotIndex = path.length();    }    return path.substring(separatorIndex + 1, dotIndex);  }  /**   * 获取文件名   */  public static String getFileName(String path) {    if(path == null) {      return null;    }    int separatorIndex = path.lastIndexOf(File.separator);    return (separatorIndex < 0) ? path : path.substring(separatorIndex + 1, path.length());  }  /**   * 获取扩展名   */  public static String getExtension(String path) {    if(path == null) {      return null;    }    int dot = path.lastIndexOf(".");    if(dot >= 0) {      return path.substring(dot);    } else {      return "";    }  }  public static File getUriFile(Context context, Uri uri) {    String path = getUriPath(context, uri);    if(path == null) {      return null;    }    return new File(path);  }  public static String getUriPath(Context context, Uri uri) {    if(uri == null) {      return null;    }    if(Build.VERSION.SDK_INT >= Build.VERSION_CODES.KITKAT && DocumentsContract.isDocumentUri(context, uri)) {      if("com.android.externalstorage.documents".equals(uri.getAuthority())) {        final String docId = DocumentsContract.getDocumentId(uri);        final String[] split = docId.split(":");        final String type = split[0];        if("primary".equalsIgnoreCase(type)) {          return Environment.getExternalStorageDirectory() + "/" + split[1];        }      } else if("com.android.providers.downloads.documents".equals(uri.getAuthority())) {        final String id = DocumentsContract.getDocumentId(uri);        final Uri contentUri = ContentUris.withAppendedId(Uri.parse("content://downloads/public_downloads"), Long.valueOf(id));        return getDataColumn(context, contentUri, null, null);      } else if("com.android.providers.media.documents".equals(uri.getAuthority())) {        final String docId = DocumentsContract.getDocumentId(uri);        final String[] split = docId.split(":");        final String type = split[0];        Uri contentUri = null;        if("image".equals(type)) {          contentUri = MediaStore.Images.Media.EXTERNAL_CONTENT_URI;        } else if("video".equals(type)) {          contentUri = MediaStore.Video.Media.EXTERNAL_CONTENT_URI;        } else if("audio".equals(type)) {          contentUri = MediaStore.Audio.Media.EXTERNAL_CONTENT_URI;        }        final String selection = "_id=?";        final String[] selectionArgs = new String[] {split[1]};        return getDataColumn(context, contentUri, selection, selectionArgs);      }    } else if("content".equalsIgnoreCase(uri.getScheme())) {      if("com.google.android.apps.photos.content".equals(uri.getAuthority())) {        return uri.getLastPathSegment();      }      return getDataColumn(context, uri, null, null);    } else if("file".equalsIgnoreCase(uri.getScheme())) {      return uri.getPath();    }    return null;  }  public static String getDataColumn(Context context, Uri uri, String selection, String[] selectionArgs) {    Cursor cursor = null;    final String column = "_data";    final String[] projection = {column};    try {      cursor = context.getContentResolver().query(uri, projection, selection, selectionArgs, null);      if(cursor != null && cursor.moveToFirst()) {        final int column_index = cursor.getColumnIndexOrThrow(column);        return cursor.getString(column_index);      }    } finally {      if(cursor != null) cursor.close();    }    return null;  }}

 final String[] projectionPhotos = {        MediaStore.Images.Media._ID,//每一列的ID 图片的ID        MediaStore.Images.Media.BUCKET_ID,//图片所在文件夹ID        MediaStore.Images.Media.BUCKET_DISPLAY_NAME,//图片所在文件夹名称        MediaStore.Images.Media.DATA,//图片路径        MediaStore.Images.Media.DATE_TAKEN,//图片创建时间    }; cursor = MediaStore.Images.Media.query(context.getContentResolver(), MediaStore.Images.Media.EXTERNAL_CONTENT_URI    , projectionPhotos, "", null, MediaStore.Images.Media.DATE_TAKEN + " DESC");