Android Studio与HMS Core的第一次亲密接触——开发开发HiAI文字识别应用

package com.waylau.android.huaweihmscorehiai;

import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;

import android.Manifest;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;

import com.huawei.hiai.vision.common.ConnectionCallback;
import com.huawei.hiai.vision.common.VisionBase;
import com.huawei.hiai.vision.common.VisionCallback;
import com.huawei.hiai.vision.common.VisionImage;
import com.huawei.hiai.vision.text.TextDetector;
import com.huawei.hiai.vision.visionkit.text.Text;

public class MainActivity extends AppCompatActivity {
    private static final String TAG = "MainActivity";
    private TextView textView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 权限申请
        requestPermissions();

        // VisionBase 初始化
        visionInit();

        textView = (TextView) findViewById(R.id.text_hello);

        final Button button = findViewById(R.id.button);
        button.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                doHiAI();
            }
        });
    }

    private void doHiAI() {
        //进行detector类的初始化
        TextDetector mTextDetector = new TextDetector(MainActivity.this); // 构造Detector

        // 定义VisionImage，并传入待检测图片bitmap
        Bitmap bitmap = BitmapFactory.decodeResource(this.getResources(), R.drawable.wx);
        VisionImage image = VisionImage.fromBitmap(bitmap);

        // 定义Text类
        Text result = new Text();


        // 调用TextDetector的detect的方法，获取结果
        int result_code = mTextDetector.detect(image, result, new VisionCallback() {

            @Override
            public void onResult(Object o) {
                Log.i(TAG, "result: " + result.getValue());

                // 结果回写到界面
                textView.setText(result.getValue());
            }

            @Override
            public void onError(int i) {
                Log.i(TAG, "onError: " + i);
            }

            @Override
            public void onProcessing(float v) {
                Log.i(TAG, "onProcessing: " + v);
            }
        });

        // 获取状态值
        Log.i(TAG, "result_code: " + result_code);
    }

    private void visionInit() {
        VisionBase.init(this, new ConnectionCallback() {
            @Override
            public void onServiceConnect() {
                Log.e(TAG, " onServiceConnect");
            }

            @Override
            public void onServiceDisconnect() {
                Log.e(TAG, " onServiceDisconnect");
            }
        });
    }

    private void requestPermissions() {
        try {
            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
                int permission1 = ActivityCompat.checkSelfPermission(this,
                        Manifest.permission.WRITE_EXTERNAL_STORAGE);
                int permission2 = ActivityCompat.checkSelfPermission(this,
                        Manifest.permission.CAMERA);
                if (permission1 != PackageManager.PERMISSION_GRANTED || permission2 != PackageManager
                        .PERMISSION_GRANTED) {
                    ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE,
                            Manifest.permission.READ_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, 0x0010);
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}