标签: metadata-extractor

我想添加metadata-extractor-2.8.1.jar我的android studio项目.

但每次我点击"添加为库" jar文件不添加.仅记录a Null pointer exception.

以下是异常消息:

java.lang.NullPointerException
    at com.android.tools.idea.actions.CreateLibraryFromFilesAction$CreateGradleLibraryFromFilesDialog.<init>(CreateLibraryFromFilesAction.java:152)
    at com.android.tools.idea.actions.CreateLibraryFromFilesAction.actionPerformed(CreateLibraryFromFilesAction.java:90)
    at com.intellij.openapi.actionSystem.ex.ActionUtil.performActionDumbAware(ActionUtil.java:164)
    at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter$1.run(ActionMenuItem.java:266)
    at com.intellij.openapi.wm.impl.FocusManagerImpl.runOnOwnContext(FocusManagerImpl.java:926)
    at com.intellij.openapi.wm.impl.IdeFocusManagerImpl.runOnOwnContext(IdeFocusManagerImpl.java:124)
    at com.intellij.openapi.actionSystem.impl.ActionMenuItem$ActionTransmitter.actionPerformed(ActionMenuItem.java:236)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at com.intellij.openapi.actionSystem.impl.ActionMenuItem.fireActionPerformed(ActionMenuItem.java:105)
    at com.intellij.ui.plaf.beg.BegMenuItemUI.doClick(BegMenuItemUI.java:512)
    at com.intellij.ui.plaf.beg.BegMenuItemUI.access$300(BegMenuItemUI.java:44)
    at com.intellij.ui.plaf.beg.BegMenuItemUI$MyMouseInputHandler.mouseReleased(BegMenuItemUI.java:532)
    at java.awt.Component.processMouseEvent(Component.java:6525)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3321)
    at java.awt.Component.processEvent(Component.java:6290)
    at java.awt.Container.processEvent(Container.java:2234)
    at java.awt.Component.dispatchEventImpl(Component.java:4881)
    at java.awt.Container.dispatchEventImpl(Container.java:2292)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462)
    at java.awt.Container.dispatchEventImpl(Container.java:2278)
    at java.awt.Window.dispatchEventImpl(Window.java:2739)
    at java.awt.Component.dispatchEvent(Component.java:4703)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746)
    at java.awt.EventQueue.access$400(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:697)
    at java.awt.EventQueue$3.run(EventQueue.java:691)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75)
    at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86) …

我正在使用优秀的元数据提取器库。它非常适合从许多不同的图像格式中检索详细的元数据。

然而，对于一个项目，我只对提取“常见图像元数据”（如宽度和高度）感兴趣。在此用例中，API 非常冗长（AFIAK）。

我正在寻找一个方便的 API，例如：

final MetadataWrapper md = MetadataWrapper.readMetadata(file);
FileType type = md.getFileType();
int width = md.getWidth();
int height = md.getHeight();

有什么建议么？

我正在尝试使用NetBeans 在Java https://github.com/drewnoakes/metadata-extractor中将该库用于图像元数据提取。

我将文件metadata-extractor-2.7.0.jar导入到项目的jar文件夹中，就像自述文件所述，我只是这样做：

File file = fc.getSelectedFile ();
try {
    Metadata metadata = ImageMetadataReader.readMetadata(file);
} catch ( ImageProcessingException ex ) {
    Logger.getLogger ( UserInterface.class.getName() ).log ( Level.SEVERE, null, ex );
} catch ( IOException ex ) {
    Logger.getLogger ( UserInterface.class.getName() ).log ( Level.SEVERE, null, ex );
}

但我总是得到

Exception in thread "AWT-EventQueue-0" java.lang.NoClassDefFoundError: com/adobe/xmp/XMPException
at com.drew.imaging.jpeg.JpegMetadataReader.<clinit>(Unknown Source)
at com.drew.imaging.ImageMetadataReader.readMetadata(Unknown Source)
at com.drew.imaging.ImageMetadataReader.readMetadata(Unknown Source)

开始使用此库之前，需要在Netbeans中进行配置吗？