1
我試圖將圖像保存到iOS中的存儲時遇到問題。圖像已下載但未保存。iOS保存到存儲問題
的代碼是：
Form hi = new Form("Toolbar", new BoxLayout(BoxLayout.Y_AXIS));
TreeModel tm = new TreeModel() {
@Override
public Vector getChildren(Object parent) {
String[] files;
if (parent == null) {
files = FileSystemStorage.getInstance().getRoots();
return new Vector<Object>(Arrays.asList(files));
} else {
try {
files = FileSystemStorage.getInstance().listFiles((String) parent);
} catch (IOException err) {
Log.e(err);
files = new String[0];
}
}
String p = (String) parent;
Vector result = new Vector();
for (String s : files) {
result.add(p + s);
}
return result;
}
@Override
public boolean isLeaf(Object node) {
return !FileSystemStorage.getInstance().isDirectory((String) node);
}
};
Command tree = new Command("Show tree") {
@Override
public void actionPerformed(ActionEvent evt) {
Form treeForm = new Form("Tree", new BorderLayout());
Tree t = new Tree(tm) {
@Override
protected String childToDisplayLabel(Object child) {
String n = (String) child;
int pos = n.lastIndexOf("/");
if (pos < 0) {
return n;
}
return n.substring(pos);
}
};
treeForm.add(BorderLayout.CENTER, t);
Command back = new Command("Back") {
@Override
public void actionPerformed(ActionEvent evt) {
hi.showBack();
}
};
Button backButton = new Button(back);
treeForm.add(BorderLayout.SOUTH, backButton);
treeForm.show();
}
};
hi.getToolbar().addCommandToOverflowMenu(tree);
EncodedImage placeholder = EncodedImage.createFromImage(Image.createImage(hi.getWidth(), hi.getWidth()/5, 0xffff0000), true);
String photoURL = "https://awoiaf.westeros.org/images/thumb/9/93/AGameOfThrones.jpg/400px-AGameOfThrones.jpg";
StringBuilder fsPath = new StringBuilder(FileSystemStorage.getInstance().getAppHomePath());
fsPath.append("400px-AGameOfThrones.jpg");
URLImage background = URLImage.createToStorage(placeholder, fsPath.toString(), photoURL);
background.fetch();
Style stitle = hi.getToolbar().getTitleComponent().getUnselectedStyle();
stitle.setBgImage(background);
stitle.setBackgroundType(Style.BACKGROUND_IMAGE_SCALED_FILL);
stitle.setPaddingUnit(Style.UNIT_TYPE_DIPS, Style.UNIT_TYPE_DIPS, Style.UNIT_TYPE_DIPS, Style.UNIT_TYPE_DIPS);
stitle.setPaddingTop(15);
SpanButton credit = new SpanButton("Link");
credit.addActionListener((e) -> Display.getInstance().execute("https://awoiaf.westeros.org/index.php/A_Game_of_Thrones"));
hi.add(new SpanLabel("A")).
add(new Label("B", "Heading")).
add(credit);
ComponentAnimation title = hi.getToolbar().getTitleComponent().createStyleAnimation("Title", 200);
hi.getAnimationManager().onTitleScrollAnimation(title);
hi.show();
這是一個從https://www.codenameone.com/javadoc/com/codename1/ui/URLImage.html
樹採取是隻看到在拍攝時保存在存儲。