I Want To Save A .png Image From Androidplot

I have written a code which plots a Line Graph. This graph is plotted by using Android Plot.. How can i save this graph as .png image??

Solution 1:

You can get the drawing cache of any View as a bitmap with:

Bitmapbitmap= view.getDrawingCache();

Then you can simply save the bitmap to a file with:

FileOutputStream fos = c.openFileOutput(filename, Context.MODE_PRIVATE);
bitmap.compress(Bitmap.CompressFormat.PNG, 90, fos);
fos.close();

This example will save the bitmap to the local storage which is only accessible by your app. For more information about saving files check out the docs: http://developer.android.com/guide/topics/data/data-storage.html

Solution 2:

Before call method Bitmap bitmap = view.getDrawingCache(); you have to call the method view.setDrawingCacheEnabled(true).

Anyway it doesn't work on all Views, if your View extends SurfaceView the bitmap returned will be a black image. In that cases you have to use the method draw of your view (link to another post).

P.S.: slayton if I could write comments I would comment your post but I haven't got enought reputation

Solution 3:

I found a solution in png format:

plot = (XYPlot) findViewById(R.id.pot);
plot.layout(0, 0, 400, 200);

XYSeriesseries=newSimpleXYSeries(Arrays.asList(array1),Arrays.asList(array2),"series");

            LineAndPointFormatterseriesFormat=newLineAndPointFormatter();
            seriesFormat.setPointLabelFormatter(newPointLabelFormatter());

            plot.addSeries(series, seriesFormat);

            plot.setDrawingCacheEnabled(true);

 FileOutputStreamfos=newFileOutputStream("/sdcard/DCIM/img.png", true);

            plot.getDrawingCache().compress(CompressFormat.PNG, 100, fos);

            fos.close();

            plot.setDrawingCacheEnabled(false);