扫描二维码和生成二维码

compile 'cn.yipianfengye.android:zxing-library:1.8'

public class MainActivity extends AppCompatActivity implements View.OnClickListener{

private ImageView iv;

@Override

protected void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Button bu= (Button) findViewById(R.id.dian);

Button erwei= (Button) findViewById(R.id.erweima);

Button zi= (Button) findViewById(R.id.zi);

iv = (ImageView) findViewById(R.id.pic);

bu.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

Intent intent = new Intent(MainActivity.this, CaptureActivity.class);

startActivityForResult(intent, 200);

}

});

erwei.setOnClickListener(this);

zi.setOnClickListener(this);

}

@Override

protected void onActivityResult(int requestCode, int resultCode, Intent data) {

super.onActivityResult(requestCode, resultCode, data);

if (requestCode == 200) {

//处理扫描结果（在界面上显示）

if (null != data) {

Bundle bundle = data.getExtras();

if (bundle == null) {

return;

}

if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_SUCCESS) {

String result = bundle.getString(CodeUtils.RESULT_STRING);

Toast.makeText(this, "解析结果:" + result, Toast.LENGTH_LONG).show();

} else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {

Toast.makeText(MainActivity.this, "解析二维码失败", Toast.LENGTH_LONG).show();

}

}

}

}

@Override

public void onClick(View v) {

Bitmap bitmap = null;

switch (v.getId()){

case R.id.erweima:

//生成二维码

bitmap = generateBitmap("http://blog.youkuaiyun.com/yanzhenjie1003/article/details/52503533", 400, 400);

iv.setImageBitmap(bitmap);

break;

case R.id.zi:

//生成自定义的二维码

//先生成二维码

bitmap = generateBitmap("http://blog.youkuaiyun.com/yanzhenjie1003/article/details/52503533", 400, 400);

//添加logo

//先得到一个logo图标

Bitmap logoBitmap = BitmapFactory.decodeResource(getResources(), R.mipmap.ic_launcher);

//把logo添加到二维码上

Bitmap customBitmap = addLogo(bitmap, logoBitmap);

iv.setImageBitmap(customBitmap);

break;

}

}

//生成二维码

private Bitmap generateBitmap(String content, int width, int height) {

QRCodeWriter qrCodeWriter = new QRCodeWriter();

Map<EncodeHintType, String> hints = new HashMap<>();

hints.put(EncodeHintType.CHARACTER_SET, "utf-8");

try {

BitMatrix encode = qrCodeWriter.encode(content, BarcodeFormat.QR_CODE, width, height);

int[] pixels = new int[width * height];

for (int i = 0; i < height; i++) {

for (int j = 0; j < width; j++) {

if (encode.get(j, i)) {

pixels[i * width + j] = 0x00000000;

} else {

pixels[i * width + j] = 0xffffffff;

}

}

}

return Bitmap.createBitmap(pixels, 0, width, width, height, Bitmap.Config.RGB_565);

} catch (WriterException e) {

e.printStackTrace();

}

return null;

}

/**

* 添加图标

*

* @param qrBitmap

* @param logoBitmap

* @return

*/

private Bitmap addLogo(Bitmap qrBitmap, Bitmap logoBitmap) {

int qrBitmapWidth = qrBitmap.getWidth();

int qrBitmapHeight = qrBitmap.getHeight();

int logoBitmapWidth = logoBitmap.getWidth();

int logoBitmapHeight = logoBitmap.getHeight();

Bitmap blankBitmap = Bitmap.createBitmap(qrBitmapWidth, qrBitmapHeight, Bitmap.Config.ARGB_8888);

Canvas canvas = new Canvas(blankBitmap);

canvas.drawBitmap(qrBitmap, 0, 0, null);

canvas.save(Canvas.ALL_SAVE_FLAG);

float scaleSize = 1.0f;

while ((logoBitmapWidth / scaleSize) > (qrBitmapWidth / 5) || (logoBitmapHeight / scaleSize) > (qrBitmapHeight / 5)) {

scaleSize *= 2;

}

float sx = 1.0f / scaleSize;

canvas.scale(sx, sx, qrBitmapWidth / 2, qrBitmapHeight / 2);

canvas.drawBitmap(logoBitmap, (qrBitmapWidth - logoBitmapWidth) / 2, (qrBitmapHeight - logoBitmapHeight) / 2, null);

canvas.restore();

return blankBitmap;

}

}