Draw a line in android using canvas

In this post we learn that how to draw a line in android using canvas.

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For draw a line in your layout follow this code.

Create one class DrawView which extends View.

public class DrawView extends View {
    Paint paint = new Paint();

    public DrawView(Context context) {
        super(context);
        paint.setColor(Color.BLACK);
    }

    @Override
    public void onDraw(Canvas canvas) {
            canvas.drawLine(0, 50, 350, 50, paint);
    }

}

Now from your main Activity create Object of this class and in setContentView method add that view.

Code for Activity is like this.

public class MainActivity extends Activity {
    DrawView drawView;

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

        drawView = new DrawView(this);
        drawView.setBackgroundColor(Color.WHITE);
        setContentView(drawView);

    }
}

See the output of this example.

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