Friday, August 19, 2011

Read Manifest Values in ANDROID

 
        try {
               PackageManager manager = this.getPackageManager();
               PackageInfo info = manager.getPackageInfo(this.getPackageName(),PackageManager.GET_ACTIVITIES);
               Toast.makeText(
                 this,
                 "PackageName = " + info.packageName + "\nVersionCode = "
                   + info.versionCode + "\nVersionName = "
                   + info.versionName + "\nActivities = "+info.activities[0], Toast.LENGTH_LONG).show();
              } catch (Exception e) {
               System.out.println(" Exception in onCreate() : e = " + e);
              }
           
we need to place this code in onCreate method of Activity...........

Wednesday, August 17, 2011

'U' Can rise ur 'QUESTIONS'

This post is dedicated for members to ask their questions and doubts related to j2me and android !!!
I will try to get solutions for that as per my knowledge...

Custom Progress Bar in J2me



protected void paintSpinner(Graphics g, int xPostion, int yPosition, int widthOfProgressBar,
            int heightOfProgressBar) {
        int side = Math.min(widthOfProgressBar, heightOfProgressBar);
        int diameter = side / 6;
        int radius = diameter / 2;
        double toCenter = side / 3;
        int temp = (side / 2) - radius;
        int left = xPostion + temp;
        int top = yPosition+ temp;
        int horizontalAlignment = Graphics.HCENTER;
        if (horizontalAlignment == Graphics.HCENTER) {
            left += (widthOfProgressBar- side) / 2;
        } else if (horizontalAlignment == Graphics.RIGHT) {
            left += (widthOfProgressBar- side);
        }
                  int foreground = 0x0033FF; //starting color
                  int background = 0xCCCC66;// end color
             
        int redStart = (background & 0x00FF0000) >> 16;
        int greenStart = (background & 0x0000FF00) >> 8;
        int blueStart = (background & 0x000000FF);

        int redDelta = (foreground & 0x00FF0000) >> 16;
        int greenDelta = (foreground & 0x0000FF00) >> 8;
        int blueDelta = (foreground & 0x000000FF);

        redDelta = (redDelta - redStart) / 12;
        greenDelta = (greenDelta - greenStart) / 12;
        blueDelta = (blueDelta - blueStart) / 12;
        for (int hour = 1; hour <= 12; hour++) {
            int angle = ((hour - 3) * -30 + 360) % 360;
            double radians = Math.toRadians(angle);
            int cx = (int) (Math.cos(radians) * toCenter);
            int cy = (int) (Math.sin(radians) * toCenter) * -1;
            int offset = ((hour - spinnerHour) + 12) % 12;
            int red = redStart + (offset * redDelta);
            int green = greenStart + (offset * greenDelta);
            int blue = blueStart + (offset * blueDelta);
            g.setColor(red, green, blue);
            g.fillRoundRect(left + cx, top + cy, diameter, diameter, diameter,
                    diameter);
        }
    }

we have to call this method from paint method. it will display 12 circles in round shape with each color has different color...By using timers , we should call repaint method with some interval.then colors of each circles will be changed .. so it will look like that circles are rotated with 360 degress angle...

By making some simple changes in diameter of circles and colors..we can create lot of custom Progress bars...
We can change Colors by changing the color code in foreground and background values in above code...


OutPUT: