Design
What do you mean by Android simple graphics
To draw graphics, the android.graphics.Canvas is used in android that provides methods to draw oval, rectangle, picture, text, line, etc. Along with the canvas, the android.graphics.Paint class is used to draw the objects. The information about the color and style are included in the Paint class.
Example:
In the below example, we are using the Android Canvas, Color, and Paint classes to display the 2D graphics in android.
activity_main.xml:
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Activity class:(File: MainActivity.java)
package com.example.radioapp;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.drawable.BitmapDrawable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;
public class MainActivity extends AppCompatActivity {
Button b1, b2, b3;
ImageView im;
private Bitmap bmp;
private Bitmap operation;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
b1 = (Button) findViewById(R.id.button);
b2 = (Button) findViewById(R.id.button2);
b3 = (Button) findViewById(R.id.button3);
im = (ImageView) findViewById(R.id.imageView);
BitmapDrawable abmp = (BitmapDrawable) im.getDrawable();
bmp = abmp.getBitmap();
}
public void gray(View view) {
operation = Bitmap.createBitmap(bmp.getWidth(),bmp.getHeight(), bmp.getConfig());
double red = 0.33;
double green = 0.59;
double blue = 0.11;
for (int i = 0; i < bmp.getWidth(); i++) {
for (int j = 0; j < bmp.getHeight(); j++) {
int p = bmp.getPixel(i, j);
int r = Color.red(p);
int g = Color.green(p);
int b = Color.blue(p);
r = (int) red * r;
g = (int) green * g;
b = (int) blue * b;
operation.setPixel(i, j, Color.argb(Color.alpha(p), r, g, b));
}
}
im.setImageBitmap(operation);
}
public void bright(View view){
operation= Bitmap.createBitmap(bmp.getWidth(), bmp.getHeight(),bmp.getConfig());
for(int i=0; i
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AndroidManifest.xml:
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