我正在尝试将剪贴板的内容复制到文本框，但我收到了“无效的线程访问”消息。
我在剪贴板上使用了一个监听器，如果有一些变化，会通知我。
我创建了一个新线程来包装侦听器，但它似乎无法正常工作。
这是代码：
public class ClipboardDialog extends TitleAreaDialog {
// Local attributs
private Text mTextClipboardcontent;
public ClipboardDialog (Shell parentShell) {
super(parentShell);
}
@Override
protected Control createDialogArea(Composite parent) {
// Creating display and controls
setTitle("ClipBoard content");
Composite area = (Composite) super.createDialogArea(parent);
Composite container = new Composite(area, SWT.NONE);
container.setLayout(new FormLayout());
GridData gd_container = new GridData(GridData.FILL_HORIZONTAL);
// gd_container.grabExcessVerticalSpace = true;
gd_container.horizontalAlignment = SWT.LEFT;
gd_container.verticalAlignment = SWT.TOP;
container.setLayoutData(gd_container);
// Group control
Group grpInputData = new Group(container, SWT.NONE);
FormData fd_grpInputData = new FormData();
fd_grpInputData.bottom = new FormAttachment(0, 303);
fd_grpInputData.right = new FormAttachment(0, 467);
fd_grpInputData.top = new FormAttachment(0, 5);
fd_grpInputData.left = new FormAttachment(0, 5);
grpInputData.setLayoutData(fd_grpInputData);
grpInputData.setText("Input Data");
GridLayout gl_grpInputData = new GridLayout(4, false);
gl_grpInputData.marginLeft = 4;
gl_grpInputData.marginHeight = 0;
gl_grpInputData.marginWidth = 2;
gl_grpInputData.verticalSpacing = 10;
gl_grpInputData.horizontalSpacing = 10;
grpInputData.setLayout(gl_grpInputData);
new Label(grpInputData, SWT.NONE);
new Label(grpInputData, SWT.NONE);
new Label(grpInputData, SWT.NONE);
new Label(grpInputData, SWT.NONE);
new Label(grpInputData, SWT.NONE);
// Input control
mTextClipboardcontent = new Text(grpInputData, SWT.BORDER);
GridData gdContent = new GridData(SWT.LEFT, SWT.TOP, false, false, 1,
1);
gdContent.heightHint = 18;
gdContent.widthHint = 250;
mTextClipboardcontent.setLayoutData(gdContent);
mTextClipboardcontent.setBounds(0, 0, 76, 21);
mTextClipboardcontent.setTextLimit(8);
new Thread(new Runnable() {
public void run() {
while (true) {
try {
Thread.sleep(1000);
} catch (Exception e) {
}
Display.getDefault().syncExec(new Runnable() {
public void run() {
Toolkit.getDefaultToolkit().getSystemClipboard()
.addFlavorListener(new FlavorListener() {
@Override
public void flavorsChanged(FlavorEvent e) {
String result = "";
Clipboard clipboard = Toolkit
.getDefaultToolkit()
.getSystemClipboard();
Transferable contents = clipboard
.getContents(null);
boolean hasTransferableText = (contents != null)
&& contents
.isDataFlavorSupported(DataFlavor.stringFlavor);
if (hasTransferableText) {
try {
// Getting the content of
// the ClipBoard
result = (String) contents
.getTransferData(DataFlavor.stringFlavor);
mTextContent.settext(result);
} catch (UnsupportedFlavorException ex) {
// Loggin the exception
Log.LogError(
ex.getClass()
.getCanonicalName(),
ex.getMessage());
} catch (IOException ex) {
// Loggin the exception
Log.LogError(
ex.getClass()
.getCanonicalName(),
ex.getMessage());
}
}
}
});
}
});
}
}
}).start();
return area;
}
/**
* Create contents of the button bar.
*
* @param parent
*/
@Override
protected void createButtonsForButtonBar(Composite parent) {
Button mBtnOK = createButton(parent, IDialogConstants.OK_ID,
IDialogConstants.OK_LABEL, true);
mBtnOK.setEnabled(false);
createButton(parent, IDialogConstants.CANCEL_ID,
IDialogConstants.CANCEL_LABEL, false);
}
/**
* Return the initial size of the dialog.
*/
@Override
protected Point getInitialSize() {
return new Point(479, 400);
}
}
答案 0 :(得分：4)
在一个不是UI线程的线程中调用您的flavor侦听器。
您需要使用Runnable（或Display，根据需要）传递给asyncExec syncExec执行其代码：
Toolkit.getDefaultToolkit().getSystemClipboard().addFlavorListener(
new FlavorListener() {
@Override
public void flavorsChanged(FlavorEvent e) {
Display.getDefault().asyncExec(new Runnable(){
public void run(){
// do things on the UI thread
String result = "";
Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
Transferable contents = clipboard.getContents(null);
...
}
}
});
runnable将在UI线程上执行，从而避免您的错误。
请注意，您可能不需要在UI线程中执行此操作：
Toolkit.getDefaultToolkit().getSystemClipboard()
.addFlavorListener(