调用系统图库:
Intent intent = new Intent(Intent.ACTION_PICK,MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
startActivityForResult(intent, REQUEST_CODE_IMAGE);
获取图片路径
@Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
   super.onActivityResult(requestCode, resultCode, data);
   if (requestCode == REQUEST_CODE_IMAGE && resultCode == RESULT_OK) {
      Uri uri = data.getData();
      Cursor cursor = getContentResolver().query(uri, null, null, null,null);
      if (cursor != null && cursor.moveToFirst()) {
          String path = cursor.getString(cursor.getColumnIndexOrThrow(MediaStore.Images.Media.DATA));
    }
   }
 }