public class TwoActivity extends Activity implements OnClickListener {
private int QR_WIDTH = 400;
private int QR_HEIGHT = 400;
private ImageView qr_image;
private Button bt_button;
private EditText qr_text;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_two);
qr_text = (EditText) findViewById(R.id.qr_text);
qr_image = (ImageView) findViewById(R.id.qr_image);
bt_button = (Button) findViewById(R.id.bt_button);
bt_button.setOnClickListener(this);
}
// 生成QR图
private void createImage() {
try {
// 需要引入core包
QRCodeWriter writer = new QRCodeWriter();
String text = qr_text.getText().toString();
if (text == null || "".equals(text) || text.length() < 1) {
return;
}
// 把输入的文本转为二维码
BitMatrix martix = writer.encode(text, BarcodeFormat.QR_CODE,
QR_WIDTH, QR_HEIGHT);
System.out.println("w:" + martix.getWidth() + "h:"
+ martix.getHeight());
Hashtable<EncodeHintType, String> hints = new Hashtable<EncodeHintType, String>();
hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
BitMatrix bitMatrix = new QRCodeWriter().encode(text,
BarcodeFormat.QR_CODE, QR_WIDTH, QR_HEIGHT, hints);
int[] pixels = new int[QR_WIDTH * QR_HEIGHT];
for (int y = 0; y < QR_HEIGHT; y++) {
for (int x = 0; x < QR_WIDTH; x++) {
if (bitMatrix.get(x, y)) {
pixels[y * QR_WIDTH + x] = 0xff000000;
} else {
pixels[y * QR_WIDTH + x] = 0xffffffff;
}
}
}
Bitmap bitmap = Bitmap.createBitmap(QR_WIDTH, QR_HEIGHT,
Bitmap.Config.ARGB_8888);
bitmap.setPixels(pixels, 0, QR_WIDTH, 0, 0, QR_WIDTH, QR_HEIGHT);
qr_image.setImageBitmap(bitmap);
} catch (WriterException e) {
e.printStackTrace();
}
}
public void onClick(View v) {
createImage();
}
}