Android 百度文字识别（详细步骤+源码）

2401_84545364

530人浏览 · 2024-04-29 01:39:40

2401_84545364 · 2024-04-29 01:39:40 发布

<?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=“.MainActivity”>

<Button

android:id=“@+id/general_basic_button”

android:layout_width=“match_parent”

android:layout_height=“wrap_content”

android:onClick=“generalBasic”

android:text=“通用文字识别” />

然后在MainActivity中创建一个generalBasic方法。如下:

/**

通用文字识别
@param view

public void generalBasic(View view) {

}

然后创建一个成员变量

/**

通用文字识别请求码

private static final int REQUEST_CODE_GENERAL_BASIC = 100;

创建获取保存文件的方法和Toast提示的方法

/**

Toast提示
@param msg

private void showMsg(String msg) {

Toast.makeText(this,msg,Toast.LENGTH_SHORT).show();

}

/**

获取保存文件
@param context
@return

public static File getSaveFile(Context context) {

File file = new File(context.getFilesDir(), “pic.jpg”);

return file;

}

点击按钮时调用generalBasic

/**

通用文字识别
@param view

public void generalBasic(View view) {

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

//传入文件保存的路径

intent.putExtra(CameraActivity.KEY_OUTPUT_FILE_PATH, getSaveFile(getApplication()).getAbsolutePath());

//传入文件类型

intent.putExtra(CameraActivity.KEY_CONTENT_TYPE, CameraActivity.CONTENT_TYPE_GENERAL);

//跳转页面时传递请求码，返回时根据请求码判断获取识别的数据。

startActivityForResult(intent, REQUEST_CODE_GENERAL_BASIC);

}

在com.llw.textocr包下新建一个RecognizeService类

代码如下

package com.llw.textocr;

import android.content.Context;

import com.baidu.ocr.sdk.OCR;

import com.baidu.ocr.sdk.OnResultListener;

import com.baidu.ocr.sdk.exception.OCRError;

import com.baidu.ocr.sdk.model.BankCardParams;

import com.baidu.ocr.sdk.model.BankCardResult;

import com.baidu.ocr.sdk.model.GeneralBasicParams;

import com.baidu.ocr.sdk.model.GeneralParams;

import com.baidu.ocr.sdk.model.GeneralResult;

import com.baidu.ocr.sdk.model.OcrRequestParams;

import com.baidu.ocr.sdk.model.OcrResponseResult;

import com.baidu.ocr.sdk.model.Word;

import com.baidu.ocr.sdk.model.WordSimple;

import java.io.File;

/**

Created by ruanshimin on 2017/4/20.

public class RecognizeService {

interface ServiceListener {

public void onResult(String result);

}

public static void recGeneral(Context ctx, String filePath, final ServiceListener listener) {

GeneralParams param = new GeneralParams();

param.setDetectDirection(true);

param.setVertexesLocation(true);

param.setRecognizeGranularity(GeneralParams.GRANULARITY_SMALL);

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeGeneral(param, new OnResultListener() {

@Override

public void onResult(GeneralResult result) {

StringBuilder sb = new StringBuilder();

for (WordSimple wordSimple : result.getWordList()) {

Word word = (Word) wordSimple;

sb.append(word.getWords());

sb.append(“\n”);

}

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recAccurate(Context ctx, String filePath, final ServiceListener listener) {

GeneralParams param = new GeneralParams();

param.setDetectDirection(true);

param.setVertexesLocation(true);

param.setRecognizeGranularity(GeneralParams.GRANULARITY_SMALL);

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeAccurate(param, new OnResultListener() {

@Override

public void onResult(GeneralResult result) {

StringBuilder sb = new StringBuilder();

for (WordSimple wordSimple : result.getWordList()) {

Word word = (Word) wordSimple;

sb.append(word.getWords());

sb.append(“\n”);

}

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recAccurateBasic(Context ctx, String filePath, final ServiceListener listener) {

GeneralParams param = new GeneralParams();

param.setDetectDirection(true);

param.setVertexesLocation(true);

param.setRecognizeGranularity(GeneralParams.GRANULARITY_SMALL);

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeAccurateBasic(param, new OnResultListener() {

@Override

public void onResult(GeneralResult result) {

StringBuilder sb = new StringBuilder();

for (WordSimple wordSimple : result.getWordList()) {

WordSimple word = wordSimple;

sb.append(word.getWords());

sb.append(“\n”);

}

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recGeneralBasic(Context ctx, String filePath, final ServiceListener listener) {

GeneralBasicParams param = new GeneralBasicParams();

param.setDetectDirection(true);

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeGeneralBasic(param, new OnResultListener() {

@Override

public void onResult(GeneralResult result) {

StringBuilder sb = new StringBuilder();

for (WordSimple wordSimple : result.getWordList()) {

WordSimple word = wordSimple;

sb.append(word.getWords());

sb.append(“\n”);

}

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recGeneralEnhanced(Context ctx, String filePath, final ServiceListener listener) {

GeneralBasicParams param = new GeneralBasicParams();

param.setDetectDirection(true);

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeGeneralEnhanced(param, new OnResultListener() {

@Override

public void onResult(GeneralResult result) {

StringBuilder sb = new StringBuilder();

for (WordSimple wordSimple : result.getWordList()) {

WordSimple word = wordSimple;

sb.append(word.getWords());

sb.append(“\n”);

}

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recWebimage(Context ctx, String filePath, final ServiceListener listener) {

GeneralBasicParams param = new GeneralBasicParams();

param.setDetectDirection(true);

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeWebimage(param, new OnResultListener() {

@Override

public void onResult(GeneralResult result) {

StringBuilder sb = new StringBuilder();

for (WordSimple wordSimple : result.getWordList()) {

WordSimple word = wordSimple;

sb.append(word.getWords());

sb.append(“\n”);

}

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recBankCard(Context ctx, String filePath, final ServiceListener listener) {

BankCardParams param = new BankCardParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeBankCard(param, new OnResultListener() {

@Override

public void onResult(BankCardResult result) {

String res = String.format(“卡号：%s\n类型：%s\n发卡行：%s”,

result.getBankCardNumber(),

result.getBankCardType().name(),

result.getBankName());

listener.onResult(res);

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recVehicleLicense(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeVehicleLicense(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recDrivingLicense(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeDrivingLicense(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recLicensePlate(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeLicensePlate(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recBusinessLicense(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeBusinessLicense(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recReceipt(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

param.putParam(“detect_direction”, “true”);

OCR.getInstance(ctx).recognizeReceipt(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recPassport(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizePassport(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recVatInvoice(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeVatInvoice(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recQrcode(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeQrcode(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recNumbers(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeNumbers(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recLottery(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeLottery(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recBusinessCard(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeBusinessCard(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recHandwriting(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeHandwriting(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

public static void recCustom(Context ctx, String filePath, final ServiceListener listener) {

OcrRequestParams param = new OcrRequestParams();

param.putParam(“templateSign”, “”);

param.putParam(“classifierId”, 0);

param.setImageFile(new File(filePath));

OCR.getInstance(ctx).recognizeCustom(param, new OnResultListener() {

@Override

public void onResult(OcrResponseResult result) {

listener.onResult(result.getJsonRes());

}

@Override

public void onError(OCRError error) {

listener.onResult(error.getMessage());

}

});

}

这是百度开发人员写的一个工具类，用来处理返回的数据的。

然后在MainActivity中重写onActivityResult方法。

/**

Activity回调
@param requestCode
@param resultCode
@param data

@Override

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

super.onActivityResult(requestCode, resultCode, data);

// 识别成功回调，通用文字识别

if (requestCode == REQUEST_CODE_GENERAL_BASIC && resultCode == Activity.RESULT_OK) {

RecognizeService.recGeneralBasic(this, getSaveFile(getApplicationContext()).getAbsolutePath(),

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这是百度开发人员写的一个工具类，用来处理返回的数据的。

然后在MainActivity中重写onActivityResult方法。

/**

Activity回调
@param requestCode
@param resultCode
@param data

@Override

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

super.onActivityResult(requestCode, resultCode, data);

// 识别成功回调，通用文字识别

if (requestCode == REQUEST_CODE_GENERAL_BASIC && resultCode == Activity.RESULT_OK) {

RecognizeService.recGeneralBasic(this, getSaveFile(getApplicationContext()).getAbsolutePath(),

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