CODEWITHSUNDEEP
androidandroid-layoutandroid-emulatorandroid-widgetandroid-canvas
Shreyash Mahajan
Shreyash Mahajan

Reputation: 23596

How to Save the drawing canvas in android?

I am using this API demo of the Developer site, THIS DEMO.

But i am wonder that how to save that image in to My Andrtoid Device. Is please anyone give the Code to save that drawn image to the Android Device.

Thanks.

Upvotes: 7

Views: 11658

Answers (4)

Gopal Dan
Gopal Dan

Reputation: 324

I have implemented the below approach & worked for me. Get your CustomView by using its id from xml file but not by instantiating the Customview.

View v = findViewById(R.id.custom_view);
//don't get customview by this way, View v = new CustomView(this);
int canvasWidth = v.getWidth();
int canvasHeight = v.getHeight();
Bitmap bitmap = Bitmap.createBitmap(canvasWidth, canvasHeight, Bitmap.Config.ARGB_8888);
Canvas canvas = new Canvas(bitmap);
v.draw(canvas);
ImageView imageView = findViewById(R.id.image_view);
imageView.setImageBitmap(bitmap);

All code should be inside saveButton click listener.

Upvotes: 0

Pratik
Pratik

Reputation: 30855

try this code

View content = your_view;
content.setDrawingCacheEnabled(true);
content.setDrawingCacheQuality(View.DRAWING_CACHE_QUALITY_HIGH);
Bitmap bitmap = content.getDrawingCache();
String path = Environment.getExternalStorageDirectory().getAbsolutePath();
File file = new File(path+"/image.png");
FileOutputStream ostream;
try {
    file.createNewFile();
    ostream = new FileOutputStream(file);
    bitmap.compress(CompressFormat.PNG, 100, ostream);
    ostream.flush();
    ostream.close();
    Toast.makeText(getApplicationContext(), "image saved", 5000).show();
} catch (Exception e) {
    e.printStackTrace();
    Toast.makeText(getApplicationContext(), "error", 5000).show();
}

Upvotes: 13

Jana
Jana

Reputation: 2920

drawView.setDrawingCacheEnabled(true);
Bitmap bm = null;
drawView.destroyDrawingCache();
bm=drawView.getDrawingCache();

Then write the bitmap to file using bitmap factory.

Upvotes: 1

Lior Ohana
Lior Ohana

Reputation: 3527

One option is create another Canvas (as shown below) and repeat all your drawing on this new canvas. Once done, call drawBitmap.

Bitmap bitmap = new Bitmap(// Set the params you like //);
Canvas canvas = new Canvas(bitmap);

// Do all your drawings here

canvas.drawBitmap(// The first picture //);

The best would be if there was a way to copy an existing canvas and then you wont need to re-draw everything but I couldn't find one.

Upvotes: 0

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