Android - Draw hexagon shape

To draw a hexagon shape in an Android application, you can create a custom View class that draws a hexagon using the Canvas and Path classes. Here's how to do it step-by-step:

Step-by-Step Solution

1. Create a Custom View: Define a custom view class that will draw the hexagon.
2. Implement the Drawing Logic: Override the onDraw method to define the hexagon shape.
3. Use the Custom View in Layout: Add the custom view to your layout.

Example Implementation

Step 1: Create a Custom View

Create a new class (e.g., HexagonView) that extends View:

import android.content.Context; import android.graphics.Canvas; import android.graphics.Paint; import android.graphics.Path; import android.util.AttributeSet; import android.view.View; public class HexagonView extends View { private Paint paint; private Path path; public HexagonView(Context context) { super(context); init(); } public HexagonView(Context context, AttributeSet attrs) { super(context, attrs); init(); } public HexagonView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } private void init() { paint = new Paint(); paint.setColor(0xFF000000); // Default color: black paint.setStyle(Paint.Style.FILL_AND_STROKE); paint.setAntiAlias(true); path = new Path(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); float width = getWidth(); float height = getHeight(); float centerX = width / 2; float centerY = height / 2; float radius = Math.min(centerX, centerY); path.reset(); for (int i = 0; i < 6; i++) { double angle = Math.toRadians((60 * i) + 30); float x = (float) (centerX + radius * Math.cos(angle)); float y = (float) (centerY + radius * Math.sin(angle)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } public void setHexagonColor(int color) { paint.setColor(color); invalidate(); } } 

Step 2: Use the Custom View in Layout

In your XML layout file (e.g., activity_main.xml), add the custom view:

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical"> <com.example.yourpackage.HexagonView android:layout_width="200dp" android:layout_height="200dp" android:id="@+id/hexagonView" /> </RelativeLayout> 

Step 3: Customize the Hexagon Color (Optional)

If you want to change the color of the hexagon dynamically, you can use the setHexagonColor method:

import android.os.Bundle; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); HexagonView hexagonView = findViewById(R.id.hexagonView); hexagonView.setHexagonColor(0xFFFF0000); // Set color to red } } 

Explanation:

1. Custom View:

   • The HexagonView class extends View and overrides the onDraw method to draw a hexagon.
   • The init method initializes the Paint and Path objects.
   • The onDraw method calculates the vertices of the hexagon and draws it on the canvas.

   public class HexagonView extends View { private Paint paint; private Path path; public HexagonView(Context context) { super(context); init(); } public HexagonView(Context context, AttributeSet attrs) { super(context, attrs); init(); } public HexagonView(Context context, AttributeSet attrs, int defStyleAttr) { super(context, attrs, defStyleAttr); init(); } private void init() { paint = new Paint(); paint.setColor(0xFF000000); // Default color: black paint.setStyle(Paint.Style.FILL_AND_STROKE); paint.setAntiAlias(true); path = new Path(); } @Override protected void onDraw(Canvas canvas) { super.onDraw(canvas); float width = getWidth(); float height = getHeight(); float centerX = width / 2; float centerY = height / 2; float radius = Math.min(centerX, centerY); path.reset(); for (int i = 0; i < 6; i++) { double angle = Math.toRadians((60 * i) + 30); float x = (float) (centerX + radius * Math.cos(angle)); float y = (float) (centerY + radius * Math.sin(angle)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } public void setHexagonColor(int color) { paint.setColor(color); invalidate(); } } 

2. XML Layout:

   • The custom view is added to the layout file, specifying its size.

   <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center" android:orientation="vertical"> <com.example.yourpackage.HexagonView android:layout_width="200dp" android:layout_height="200dp" android:id="@+id/hexagonView" /> </RelativeLayout> 

3. MainActivity:

   • In the MainActivity, the hexagon color can be set dynamically using the setHexagonColor method.

   import android.os.Bundle; import androidx.appcompat.app.AppCompatActivity; public class MainActivity extends AppCompatActivity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); HexagonView hexagonView = findViewById(R.id.hexagonView); hexagonView.setHexagonColor(0xFFFF0000); // Set color to red } } 

With these steps, you can draw a hexagon shape in your Android application and customize its color if needed.

Examples

1. How to draw a regular hexagon shape in Android using Canvas? Description: Draw a hexagon with equal sides using Canvas drawing methods.

   public class HexagonView extends View { private Paint paint; public HexagonView(Context context) { super(context); init(); } public HexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setColor(Color.BLACK); paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(4); // Adjust stroke width as needed } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

2. Draw a filled hexagon shape in Android with Canvas? Description: Draw a filled hexagon shape using Canvas and set a fill color.

   public class FilledHexagonView extends View { private Paint paint; public FilledHexagonView(Context context) { super(context); init(); } public FilledHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setColor(Color.BLUE); // Set fill color paint.setStyle(Paint.Style.FILL); } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

3. How to draw a hexagon shape with rounded corners in Android? Description: Create a hexagon with rounded corners using Path and Canvas drawing in Android.

   public class RoundedHexagonView extends View { private Paint paint; public RoundedHexagonView(Context context) { super(context); init(); } public RoundedHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setColor(Color.GREEN); // Set hexagon color paint.setStyle(Paint.Style.FILL); } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; float roundedRadius = radius / 3f; // Adjust roundness for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

4. Draw a hexagon with a border and transparent background in Android? Description: Draw a hexagon shape with a border stroke and transparent fill using Canvas.

   public class HexagonBorderView extends View { private Paint paint; public HexagonBorderView(Context context) { super(context); init(); } public HexagonBorderView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setColor(Color.RED); // Set border color paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(4); // Adjust stroke width } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

5. Draw a hexagon with gradient fill in Android? Description: Draw a hexagon shape with a gradient fill using Shader and Canvas in Android.

   public class GradientHexagonView extends View { private Paint paint; public GradientHexagonView(Context context) { super(context); init(); } public GradientHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); int[] colors = {Color.RED, Color.BLUE}; // Gradient colors float[] positions = {0f, 1f}; // Gradient positions Shader shader = new LinearGradient(0, 0, getWidth(), getHeight(), colors, positions, Shader.TileMode.CLAMP); paint.setShader(shader); paint.setStyle(Paint.Style.FILL); } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

6. Draw a rotated hexagon shape in Android? Description: Draw a hexagon shape rotated by a specific angle using Canvas transformations.

   public class RotatedHexagonView extends View { private Paint paint; public RotatedHexagonView(Context context) { super(context); init(); } public RotatedHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setColor(Color.MAGENTA); // Set hexagon color paint.setStyle(Paint.Style.FILL); } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; float rotationAngleDeg = 30f; // Rotation angle canvas.rotate(rotationAngleDeg, centerX, centerY); // Rotate canvas for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

7. Draw a hexagon shape with dashed border in Android? Description: Draw a hexagon shape with a dashed border stroke using PathEffect in Android.

   public class DashedHexagonView extends View { private Paint paint; public DashedHexagonView(Context context) { super(context); init(); } public DashedHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setColor(Color.YELLOW); // Set hexagon color paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(4); // Adjust stroke width paint.setPathEffect(new DashPathEffect(new float[]{10, 5}, 0)); // Dashed line effect } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

8. How to draw a hexagon shape with gradient border in Android? Description: Draw a hexagon shape with a gradient stroke using Shader and Canvas in Android.

   public class GradientBorderHexagonView extends View { private Paint paint; public GradientBorderHexagonView(Context context) { super(context); init(); } public GradientBorderHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); int[] colors = {Color.RED, Color.BLUE}; // Gradient colors float[] positions = {0f, 1f}; // Gradient positions Shader shader = new LinearGradient(0, 0, getWidth(), getHeight(), colors, positions, Shader.TileMode.CLAMP); paint.setShader(shader); paint.setStyle(Paint.Style.STROKE); paint.setStrokeWidth(4); // Adjust stroke width } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); canvas.drawPath(path, paint); } } 

9. Draw a hexagon shape with transparent corners in Android? Description: Draw a hexagon with transparent corners using clipping in Android Canvas.

   public class TransparentHexagonView extends View { private Paint paint; public TransparentHexagonView(Context context) { super(context); init(); } public TransparentHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setColor(Color.CYAN); // Set hexagon color paint.setStyle(Paint.Style.FILL); } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; float cornerRadius = 20f; // Adjust corner radius // Create hexagon path for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } } path.close(); // Clip transparent corners Path clipPath = new Path(); clipPath.moveTo(centerX, centerY - radius); clipPath.lineTo(centerX - cornerRadius, centerY - radius + cornerRadius); clipPath.lineTo(centerX - radius + cornerRadius, centerY); clipPath.lineTo(centerX - cornerRadius, centerY + radius - cornerRadius); clipPath.lineTo(centerX, centerY + radius); clipPath.lineTo(centerX + cornerRadius, centerY + radius - cornerRadius); clipPath.lineTo(centerX + radius - cornerRadius, centerY); clipPath.lineTo(centerX + cornerRadius, centerY - radius + cornerRadius); clipPath.close(); canvas.clipPath(clipPath); canvas.drawPath(path, paint); } } 

10. How to draw a hexagon shape with alternating colors in Android? Description: Draw a hexagon shape with alternating colors for each side using Path and Canvas.

    public class AlternatingColorHexagonView extends View { private Paint paint; public AlternatingColorHexagonView(Context context) { super(context); init(); } public AlternatingColorHexagonView(Context context, @Nullable AttributeSet attrs) { super(context, attrs); init(); } private void init() { paint = new Paint(); paint.setStyle(Paint.Style.FILL); } @Override protected void onDraw(Canvas canvas) { int width = getWidth(); int height = getHeight(); Path path = new Path(); float radius = Math.min(width, height) / 2f; // Calculate hexagon points float centerX = width / 2f; float centerY = height / 2f; float angleDeg = 60f; int[] colors = {Color.RED, Color.GREEN, Color.BLUE, Color.YELLOW, Color.CYAN, Color.MAGENTA}; int colorIndex = 0; for (int i = 0; i < 6; i++) { float angleRad = (float) (Math.PI / 180 * (angleDeg * i)); float x = (float) (centerX + radius * Math.cos(angleRad)); float y = (float) (centerY + radius * Math.sin(angleRad)); if (i == 0) { path.moveTo(x, y); } else { path.lineTo(x, y); } // Set alternating color paint.setColor(colors[colorIndex]); colorIndex = (colorIndex + 1) % colors.length; } path.close(); canvas.drawPath(path, paint); } } 

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