小编use*_*300的帖子

我正在使用画布应用程序,我创建了一个带有颜色选择器,撤消,重做和清除功能的画布,它也工作正常.现在,我想验证用户当前是否在画布上的背景线上绘制一条线.

例如,我有一个带虚线的背景图像,现在我希望用户在虚线上绘图,我必须验证它是否正确？在画布中是否可以,我该如何处理？

有人可以给出任何关于这个的建议,这对我来说真的很有帮助我继续我的应用程序的下一步,我的代码在这里,

public class HomeScreen extends Activity implements ColorPickerDialog.OnColorChangedListener {
    public int width;
    public int height;
    public Arrays paths1;
    private Bitmap mBitmap;
    private Canvas mCanvas;
    private Path mPath;
    private Paint mBitmapPaint;
    Context context;
    private Paint circlePaint;
    private Path circlePath;
    /* MyView mv; */
    DrawingPanel dp;
    AlertDialog dialog;
    private ArrayList<Path> undonePaths = new ArrayList<Path>();
    private ArrayList<Path> paths = new ArrayList<Path>();
    FrameLayout frmLayout;
    Canvas canvas;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_home_screen);
        dp = new DrawingPanel(this);

        frmLayout = (FrameLayout) findViewById(R.id.frameLayout); …

我正在使用此代码并从日历中获取事件，它工作正常，但是，我想从谷歌帐户日历中获取事件。例如，我也想获取 (deepakcando90@gmail.com )谷歌日历帐户事件？我知道可以，但不知道如何实现？

我的代码是，

public static void readCalendarEvent(Context context) throws ParseException {
        ContentResolver contentResolver = context.getContentResolver();
        Calendar calendar = Calendar.getInstance();
        String dtstart = "dtstart";
        String dtend = "dtend";


        SimpleDateFormat    displayFormatter = new SimpleDateFormat("EEEE, MMMM dd, yyyy");

         stime=displayFormatter.format(calendar.getTime());     

        SimpleDateFormat startFormatter = new SimpleDateFormat("MM/dd/yy");
        String dateString = startFormatter.format(calendar.getTime());

        long after = calendar.getTimeInMillis();
        SimpleDateFormat formatterr = new SimpleDateFormat("hh:mm:ss MM/dd/yy");
        Calendar endOfDay = Calendar.getInstance();
        Date dateCCC = formatterr.parse("47:59:59 " + dateString);
        endOfDay.setTime(dateCCC);



        cursor = contentResolver.query(Uri.parse("content://com.android.calendar/events"), (new String[] { "calendar_id", "title", "description", "dtstart", "dtend", "eventLocation" …

我有以下字符串:

String description= errex for Screen Share 
https://ednovo.webex.com/ednovo/j.php?ED=224466857&UID=1465621292&RT=MiM0
You can find the meeting notes here https://docs.yahoo.com/a/filter.org/document/d/1Luf_6Q73_Lm30t3x6wHS_4Ztkn7HfXDg4sZZWz-CuVw/edit?usp=sharing

我想删除网址链接并以此结束:

String description=errex for Screen Share You can find the meeting notes here 

我尝试了以下代码,但它没有检测到URL:

private String removeUrl(String commentstr)
    {
        String commentstr1=commentstr;
        String urlPattern = "((https?|ftp|gopher|telnet|file|Unsure|http):((//)|(\\\\))+[\\w\\d:#@%/;$()~_?\\+-=\\\\\\.&]*)";
        Pattern p = Pattern.compile(urlPattern,Pattern.CASE_INSENSITIVE);
        Matcher m = p.matcher(commentstr1);
        int i=0;
        while (m.find()) {
            commentstr1=commentstr1.replaceAll(m.group(i),"").trim();
            i++;
        }
        System.out.println("After url filter" +commentstr1);

        return commentstr1;
    }

这有什么不对？

我想在按下后退按钮时向用户显示一个警报对话框。例如：您确定要退出吗？我在创建警报对话框时没有遇到问题。我在在哪里调用此对话框方法()。

这是我的 HomeScreen.java

public class HomeScreen extends TabActivity {
    ConferenceOpenHelper helper_ob;
    Cursor cursorHome;
    ProfileEditScreen profileEditScreen;
    ConferenceAdapter adapter;
    EcMeeting meeting;
    final Context context = this;
    public static int HOMETEMP = 1;// Constant for Deleting the last created id
// in edit profile screen (Cancel)
    public static String HOME = "home";// constant for updating status column
    public static String CUSTOM_DIALER = "custom";
    public static String TEMPLATE = "template";// constant for updating status              // column   
    public static TabHost tabHost;
    public static final int …