build.gradle頁面新增依賴：

compile 'cn.yipianfengye.android:zxing-library:2.2'

AndroidManifest.xml新增許可權：

<uses-permission android:name="android.permission.INTERNET" />
<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" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 

<application
    android:name=".App"

activity_main.xml佈局，只放一個按鈕：

<Button
    android:onClick="bigen"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="掃描二維碼"/>

app頁面初始化：

public class App extends Application {
    @Override
    public void onCreate() {
        super.onCreate();
        ZXingLibrary.initDisplayOpinion(this);
    }
}
 

MainActivity：

public class MainActivity extends AppCompatActivity {

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

    public void bigen(View view) {
        Intent intent = new Intent(MainActivity.this, CaptureActivity.class);
        startActivityForResult(intent, 1);
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        super.onActivityResult(requestCode, resultCode, data);
        if (requestCode == 1) {
            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, "解析結果:" + result, Toast.LENGTH_SHORT).show();
                } else if (bundle.getInt(CodeUtils.RESULT_TYPE) == CodeUtils.RESULT_FAILED) {
                    Toast.makeText(this, "解析二維碼失敗", Toast.LENGTH_LONG).show();
                }
            }
        }
    }

}
 

效果圖：