Android Tutorial
Android Widgets
Activity and Intents
Android Fragments
- android-fragments
Android Menu
Android Service
- android-service
Android AlarmManager
- android-alarmmanager
Android Storage
Android SQLite
- sqlite-tutorial
- sqlite-spinner
XML and JSON
Android Multimedia
Android Speech
- texttospeech1
- texttospeech2
Android Telephony
Android Device
Camera Tutorial
- camera-tutorial
Sensor Tutorial
- sensor-tutorial
Android Graphics
- android-graphics
Android Animation
- android-animation
Android Web Service
- android-web-service
Google Map
Adding Ads
Android Examples
Android Social
Android Versions
Android Misc
Android Interview
- interview-questions

Android Simple Graphics Example

The android.graphics.Canvas can be used to draw graphics in android. It provides methods to draw oval, rectangle, picture, text, line etc.

The android.graphics.Paint class is used with canvas to draw objects. It holds the information of color and style.

In this example, we are going to display 2D graphics in android.

activity_main.xml

File: activity_main.xml

<RelativeLayout xmlns:androclass="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:paddingBottom="@dimen/activity_vertical_margin"
    android:paddingLeft="@dimen/activity_horizontal_margin"
    android:paddingRight="@dimen/activity_horizontal_margin"
    android:paddingTop="@dimen/activity_vertical_margin"
    tools:context=".MainActivity" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello_world" />

</RelativeLayout>

Activity class

File: MainActivity.java

package com.example.simplegraphics;

import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.view.View;

public class MainActivity extends Activity {

	DemoView demoview;
	/** Called when the activity is first created. */
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		demoview = new DemoView(this);
		setContentView(demoview);
	}

	private class DemoView extends View{
		public DemoView(Context context){
			super(context);
		}

		@Override protected void onDraw(Canvas canvas) {
			super.onDraw(canvas);

			// custom drawing code here
			Paint paint = new Paint();
			paint.setStyle(Paint.Style.FILL);

			// make the entire canvas white
			paint.setColor(Color.WHITE);
			canvas.drawPaint(paint);
			
			// draw blue circle with anti aliasing turned off
			paint.setAntiAlias(false);
			paint.setColor(Color.BLUE);
			canvas.drawCircle(20, 20, 15, paint);

			// draw green circle with anti aliasing turned on
			paint.setAntiAlias(true);
			paint.setColor(Color.GREEN);
			canvas.drawCircle(60, 20, 15, paint);

			// draw red rectangle with anti aliasing turned off
			paint.setAntiAlias(false);
			paint.setColor(Color.RED);
			canvas.drawRect(100, 5, 200, 30, paint);
                         
			// draw the rotated text
			canvas.rotate(-45);
		            
			paint.setStyle(Paint.Style.FILL);
			canvas.drawText("Graphics Rotation", 40, 180, paint);
			
			//undo the rotate
			canvas.restore();
		}
	}
	@Override
	public boolean onCreateOptionsMenu(Menu menu) {
		// Inflate the menu; this adds items to the action bar if it is present.
		getMenuInflater().inflate(R.menu.main, menu);
		return true;
	}
}

Output:

download this android example

Next TopicAndroid Animation Example

← prev next →

Hot Tutorials

Contact US

Email:[email protected]

Android Graphics

10/30

Android Tutorial

Android Widgets

Activity and Intents

Android Fragments

Android Menu

Android Service

Android AlarmManager

Android Storage

Android SQLite

XML and JSON

Android Multimedia

Android Speech

Android Telephony

Android Device

Camera Tutorial

Sensor Tutorial

Android Graphics

Android Animation

Android Web Service

Google Map

Adding Ads

Android Examples

Android Social

Android Versions

Android Misc

Android Interview