Android实现扫码功能
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本文实例为大家分享了Android实现扫码功能的具体代码，供大家参考，具体内容如下
1、引入
implementation 'com.journeyapps:zxing-android-embedded:3.5.0'2、使用：
public void initScan() {
IntentIntegrator integrator = new IntentIntegrator(this);
// 设置要扫描的条码类型，ONE_D_CODE_TYPES：一维码，QR_CODE_TYPES-二维码
integrator.setDesiredBarcodeFormats(IntentIntegrator.QR_CODE_TYPES);
integrator.setCaptureActivity(ScanActivity.class); //设置打开摄像头的Activity
integrator.setPrompt(""); //底部的提示文字，设为""可以置空
integrator.setCameraId(0); //前置或者后置摄像头
integrator.setBeepEnabled(true); //扫描成功的「哔哔」声，默认开启
integrator.setBarcodeImageEnabled(true);
integrator.initiateScan();
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent) {
super.onActivityResult(requestCode, resultCode, intent);
if (requestCode == IntentIntegrator.REQUEST_CODE) {
IntentResult scanResult = IntentIntegrator.parseActivityResult(requestCode, resultCode, intent);
if (scanResult != null && scanResult.getContents() != null) {
String result = scanResult.getContents();
LogUtil.d("扫码返回: " + result);
try {
JSONObject jsonObject = new JSONObject(result);
if (jsonObject.has(Constant.USERPOLICEMENID)) {
//TODO 逻辑
} else {
ToastUtil.showShortToast("未扫描到有效的信息");
}
} catch (Exception e) {
ToastUtil.showShortToast("未扫描到有效的信息");
e.printStackTrace();
}
} else {
ToastUtil.showShortToast("未扫描到有效的信息");
}
}
}3、ScanActivity
public class ScanActivity extends BackActivity {
@BindView(R.id.dbv)
DecoratedBarcodeView mDbv;
private CaptureManager captureManager;
@Override
protected int getLayoutId() {
getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
return R.layout.activity_scan;
}
@Override
protected void init() {
super.init();
captureManager = new CaptureManager(this, mDbv);
captureManager.initializeFromIntent(getIntent(), getSavedInstanceState());
captureManager.decode();
}
@Override
public void onSaveInstanceState(@NotNull Bundle outState, @NotNull PersistableBundle outPersistentState) {
super.onSaveInstanceState(outState, outPersistentState);
captureManager.onSaveInstanceState(outState);
}
@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
return mDbv.onKeyDown(keyCode, event) || super.onKeyDown(keyCode, event);
}
@Override
protected void onPause() {
super.onPause();
captureManager.onPause();
}
@Override
public void onResume() {
super.onResume();
captureManager.onResume();
}
@Override
protected void onDestroy() {
super.onDestroy();
captureManager.onDestroy();
}
}4、布局文件
activity_scan
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".ui.main.alarmassistant.ScanActivity">
<com.journeyapps.barcodescanner.DecoratedBarcodeView
android:id="@+id/dbv"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:fitsSystemWindows="true"
app:zxing_framing_rect_height="200dp"
app:zxing_framing_rect_width="200dp"
app:zxing_preview_scaling_strategy="fitXY"
app:zxing_scanner_layout="@layout/view_qr"
app:zxing_use_texture_view="true" />
</LinearLayout>view_qr
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<com.journeyapps.barcodescanner.BarcodeView
android:id="@+id/zxing_barcode_surface"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:zxing_framing_rect_height="50dp"
app:zxing_framing_rect_width="250dp" />
<com.x.x.widget.QrView
android:id="@+id/zxing_viewfinder_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
app:zxing_possible_result_points="@color/color_white"
app:zxing_result_view="@color/zxing_custom_result_view"
app:zxing_viewfinder_laser="@color/color_white"
app:zxing_viewfinder_mask="@color/zxing_custom_viewfinder_mask" />
<TextView
android:id="@+id/zxing_status_view"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="bottom|center_horizontal"
android:layout_marginBottom="30dp"
android:background="@color/zxing_transparent"
android:text="@string/zxing_msg_default_status"
android:textColor="@color/zxing_status_text" />
<com.x.common.widget.MyActionBar
android:id="@+id/action_bar"
android:layout_width="match_parent"
android:layout_height="wrap_content"
app:dark_mode="true"
app:title="扫一扫" />
</merge>5、
public class QrView extends ViewfinderView {
public int laserLinePosition = 0;
public float[] position = new float[]{0f, 0.5f, 1f};
public int[] colors = new int[]{0x0027B14D, 0xff27B14D, 0x0027B14D};
public LinearGradient linearGradient;
private int ScreenRate;
public QrView(Context context, AttributeSet attrs) {
super(context, attrs);
float density = context.getResources().getDisplayMetrics().density;
ScreenRate = (int) (15 * density);
}
@Override
public void onDraw(Canvas canvas) {
int CORNER_WIDTH = 15;
refreshSizes();
if (framingRect == null || previewFramingRect == null) {
return;
}
Rect frame = framingRect;
Rect previewFrame = previewFramingRect;
int width = canvas.getWidth();
int height = canvas.getHeight();
//绘制4个角
paint.setColor(getResources().getColor(R.color.color_white));//定义画笔的颜色
canvas.drawRect(frame.left, frame.top, frame.left + ScreenRate, frame.top + CORNER_WIDTH, paint);
canvas.drawRect(frame.left, frame.top, frame.left + CORNER_WIDTH, frame.top + ScreenRate, paint);
canvas.drawRect(frame.right - ScreenRate, frame.top, frame.right, frame.top + CORNER_WIDTH, paint);
canvas.drawRect(frame.right - CORNER_WIDTH, frame.top, frame.right, frame.top + ScreenRate, paint);
canvas.drawRect(frame.left, frame.bottom - CORNER_WIDTH, frame.left + ScreenRate, frame.bottom, paint);
canvas.drawRect(frame.left, frame.bottom - ScreenRate, frame.left + CORNER_WIDTH, frame.bottom, paint);
canvas.drawRect(frame.right - ScreenRate, frame.bottom - CORNER_WIDTH, frame.right, frame.bottom, paint);
canvas.drawRect(frame.right - CORNER_WIDTH, frame.bottom - ScreenRate, frame.right, frame.bottom, paint);
// 画出外部（即构图矩形之外）变暗
paint.setColor(resultBitmap != null ? resultColor : maskColor);
canvas.drawRect(0, 0, width, frame.top, paint);
canvas.drawRect(0, frame.top, frame.left, frame.bottom, paint);
canvas.drawRect(frame.right, frame.top, width, frame.bottom, paint);
canvas.drawRect(0, frame.bottom, width, height, paint);
if (resultBitmap != null) {
// Draw the opaque result bitmap over the scanning rectangle
paint.setAlpha(CURRENT_POINT_OPACITY);
canvas.drawBitmap(resultBitmap, null, frame, paint);
} else {
laserLinePosition = laserLinePosition + 8;
if (laserLinePosition >= frame.height()) {
laserLinePosition = 0;
}
linearGradient = new LinearGradient(frame.left + 1, frame.top + laserLinePosition, frame.right - 1, frame.top + 10 + laserLinePosition, colors, position, Shader.TileMode.CLAMP);
// Draw a red "laser scanner" line through the middle to show decoding is active
paint.setShader(linearGradient);
//绘制扫描线
canvas.drawRect(frame.left + 1, frame.top + laserLinePosition, frame.right - 1, frame.top + 10 + laserLinePosition, paint);
paint.setShader(null);
float scaleX = frame.width() / (float) previewFrame.width();
float scaleY = frame.height() / (float) previewFrame.height();
List<ResultPoint> currentPossible = possibleResultPoints;
List<ResultPoint> currentLast = lastPossibleResultPoints;
int frameLeft = frame.left;
int frameTop = frame.top;
if (currentPossible.isEmpty()) {
lastPossibleResultPoints = null;
} else {
possibleResultPoints = new ArrayList<>(5);
lastPossibleResultPoints = currentPossible;
paint.setAlpha(CURRENT_POINT_OPACITY);
paint.setColor(resultPointColor);
for (ResultPoint point : currentPossible) {
canvas.drawCircle(frameLeft + (int) (point.getX() * scaleX), frameTop + (int) (point.getY() * scaleY), POINT_SIZE, paint);
}
}
if (currentLast != null) {
paint.setAlpha(CURRENT_POINT_OPACITY / 2);
paint.setColor(resultPointColor);
float radius = POINT_SIZE / 2.0f;
for (ResultPoint point : currentLast) {
canvas.drawCircle(frameLeft + (int) (point.getX() * scaleX), frameTop + (int) (point.getY() * scaleY), radius, paint);
}
}
postInvalidateDelayed(16, frame.left, frame.top, frame.right, frame.bottom);
}
}
}以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持编程网。
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