android 生成带logo的二维码
时间: 2024-06-14 19:04:15 浏览: 10
以下是Android生成带logo的二维码的步骤:
1. 引入依赖坐标
在项目的build.gradle文件中,添加以下依赖坐标:
```groovy
implementation 'com.google.zxing:core:3.4.0'
implementation 'com.journeyapps:zxing-android-embedded:3.6.0'
```
2. 简单二维码实现
使用ZXing库生成简单的二维码,可以参考以下代码:
```java
import android.graphics.Bitmap;
import android.graphics.Color;
import android.os.Bundle;
import android.widget.ImageView;
import androidx.appcompat.app.AppCompatActivity;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
public class MainActivity extends AppCompatActivity {
private ImageView qrCodeImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
qrCodeImageView = findViewById(R.id.qr_code_image_view);
String content = "https://www.example.com"; // 二维码内容
try {
// 设置二维码的宽高
int width = 400;
int height = 400;
// 创建QRCodeWriter对象
QRCodeWriter writer = new QRCodeWriter();
// 使用QRCodeWriter对象生成BitMatrix对象
BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height);
// 创建一个空的Bitmap对象
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
// 遍历BitMatrix对象,设置Bitmap对象的像素值
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
bitmap.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
}
}
// 设置ImageView显示二维码图片
qrCodeImageView.setImageBitmap(bitmap);
} catch (WriterException e) {
e.printStackTrace();
}
}
}
```
3. 带logo的二维码实现
为了生成带logo的二维码,我们可以在生成二维码的基础上,将logo图片合并到二维码中。可以参考以下代码:
```java
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.os.Bundle;
import android.widget.ImageView;
import androidx.appcompat.app.AppCompatActivity;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
public class MainActivity extends AppCompatActivity {
private ImageView qrCodeImageView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
qrCodeImageView = findViewById(R.id.qr_code_image_view);
String content = "https://www.example.com"; // 二维码内容
int logoResId = R.drawable.logo; // logo图片资源ID
try {
// 设置二维码的宽高
int width = 400;
int height = 400;
// 创建QRCodeWriter对象
QRCodeWriter writer = new QRCodeWriter();
// 使用QRCodeWriter对象生成BitMatrix对象
BitMatrix bitMatrix = writer.encode(content, BarcodeFormat.QR_CODE, width, height);
// 创建一个空的Bitmap对象
Bitmap bitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
// 遍历BitMatrix对象,设置Bitmap对象的像素值
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
bitmap.setPixel(x, y, bitMatrix.get(x, y) ? Color.BLACK : Color.WHITE);
}
}
// 加载logo图片
Bitmap logoBitmap = BitmapFactory.decodeResource(getResources(), logoResId);
// 创建一个新的Bitmap对象,用于合并二维码和logo图片
Bitmap resultBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.RGB_565);
// 创建一个Canvas对象,用于绘制二维码和logo图片
Canvas canvas = new Canvas(resultBitmap);
// 绘制二维码
canvas.drawBitmap(bitmap, 0, 0, null);
// 计算logo图片的宽高
int logoWidth = width / 4;
int logoHeight = height / 4;
// 设置logo图片的绘制区域
int logoLeft = (width - logoWidth) / 2;
int logoTop = (height - logoHeight) / 2;
int logoRight = logoLeft + logoWidth;
int logoBottom = logoTop + logoHeight;
// 创建一个Paint对象,用于设置logo图片的抗锯齿和透明度
Paint paint = new Paint();
paint.setAntiAlias(true);
paint.setAlpha(255);
// 绘制logo图片
canvas.drawBitmap(logoBitmap, null, new Rect(logoLeft, logoTop, logoRight, logoBottom), paint);
// 设置ImageView显示带logo的二维码图片
qrCodeImageView.setImageBitmap(resultBitmap);
} catch (WriterException e) {
e.printStackTrace();
}
}
}
```