最简单的二维码扫描Android Application Demo

谁借莪１个温暖的怀抱￠ 2023-10-17 12:11 6阅读 0赞

### 最简单的二维码扫描Android Application Demo ###

#### 添加权限 ####

<uses-permission android:name="android.permission.CAMERA" />
        <uses-permission android:name="android.permission.FLASHLIGHT" />
    
        <uses-feature android:name="android.hardware.camera" />
        <uses-feature android:name="android.hardware.camera.autofocus" />
    
        <uses-permission android:name="android.permission.VIBRATE" />
        <uses-permission android:name="android.permission.WAKE_LOCK" />

#### 添加zxing-library ####

build.gradle(Module:app) dependencies

compile 'cn.yipianfengye.android:zxing-library:2.1'

#### Activity 主程序代码 ####

package com.example.weijian.qrcodeapplication;
    
    import android.content.Intent;
    import android.content.pm.PackageManager;
    import android.os.Build;
    import android.support.v4.app.ActivityCompat;
    import android.support.v4.content.ContextCompat;
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.util.Log;
    import android.view.View;
    import android.widget.Button;
    import android.widget.TextView;
    import android.widget.Toast;
    
    import com.uuzuche.lib_zxing.activity.CaptureActivity;
    import com.uuzuche.lib_zxing.activity.CodeUtils;
    import com.uuzuche.lib_zxing.activity.ZXingLibrary;
    
    public class MainActivity extends AppCompatActivity {
    
        String TAG = "MainActivity";
        int REQUEST_CODE = 1;
    
        TextView textView;
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            //获取摄像头权限
            getCameraPermission();
            //ZXingLibrary初始化
            ZXingLibrary.initDisplayOpinion(this);
            //控件初始化
            textView = (TextView)findViewById(R.id.text);
            Button qrButton = (Button)findViewById(R.id.qrcode);
            qrButton.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
                    startActivityForResult(intent, REQUEST_CODE);
                }
            });
        }
    
        @Override
        protected void onActivityResult(int requestCode, int resultCode, Intent data) {
            super.onActivityResult(requestCode, resultCode, data);
            if (requestCode == REQUEST_CODE) {
                //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();
                        Log.e(TAG,"解析结果:" + result);
                        textView.setText(result);//解析结果显示在TextView
                    } 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();
                    }
                }
            }
        }
    
        public void getCameraPermission()
        {
            if (Build.VERSION.SDK_INT>22){
                if (ContextCompat.checkSelfPermission(MainActivity.this,
                        android.Manifest.permission.CAMERA)!= PackageManager.PERMISSION_GRANTED){
                    //先判断有没有权限 ，没有就在这里进行权限的申请
                    ActivityCompat.requestPermissions(MainActivity.this,
                            new String[]{android.Manifest.permission.CAMERA},2);
                }else {
                    //说明已经获取到摄像头权限了 想干嘛干嘛
                }
            }else {
                    //这个说明系统版本在6.0之下，不需要动态获取权限。
            }
        }
    }

#### 源码下载 ####

[http://download.csdn.net/download/kangweijian/9799594][http_download.csdn.net_download_kangweijian_9799594]

[http_download.csdn.net_download_kangweijian_9799594]: http://download.csdn.net/download/kangweijian/9799594