Android 개발 프레임워크는 ZXing QR 코드 스캐닝 인터페이스를 사용자 정의하고 뷰파인더 늘어짐 문제를 해결합니다.

먼저 렌더링을 보여드리겠습니다:

스캔된 내용은 아래 내용입니다. QR 코드는 zxing 라이브러리를 사용하여 생성되었습니다

여러 클래스를 바꾸다보니 작년에 무슨 일이 있었는지 거의 잊어버려서 이번 클래스의 코드만 업로드하게 되었습니다. 중요한 것은 CaptureActivity.java를 변경하는 것입니다

package com.zxing.activity;
import java.io.IOException;
import java.util.Vector;
import android.app.Activity;
import android.content.Intent;
import android.content.res.AssetFileDescriptor;
import android.graphics.Bitmap;
import android.media.AudioManager;
import android.media.MediaPlayer;
import android.media.MediaPlayer.OnCompletionListener;
import android.os.Handler;
import android.os.Vibrator;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.widget.Toast;
import com.ericssonlabs.R;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.Result;
import com.zxing.camera.CameraManager;
import com.zxing.decoding.CaptureActivityHandler;
import com.zxing.decoding.CaptureActivityHandler.DecodeCallback;
import com.zxing.decoding.InactivityTimer;
import com.zxing.view.ViewfinderView;
/**
* Initial the camera
* @author Ryan.Tang
* @modifier Lemon
* @use extends CaptureActivity并且在setContentView方法后调用init方法
*/
public abstract class CaptureActivity extends Activity implements Callback, DecodeCallback {
// private static final String TAG = "CaptureActivity";
protected Activity context;
protected SurfaceView surfaceView;
protected ViewfinderView viewfinderView;
/**初始化，必须在setContentView之后
* @param context
* @param viewfinderView
*/
protected void init(Activity context, SurfaceView surfaceView, ViewfinderView viewfinderView) {
this.context = context;
this.surfaceView = surfaceView;
this.viewfinderView = viewfinderView;
CameraManager.init(getApplication());
hasSurface = false;
inactivityTimer = new InactivityTimer(this);
}
private CaptureActivityHandler handler;
private boolean hasSurface;
private Vector<BarcodeFormat> decodeFormats;
private String characterSet;
private InactivityTimer inactivityTimer;
private MediaPlayer mediaPlayer;
private boolean playBeep;
private static final float BEEP_VOLUME = .f;
private boolean vibrate;
@Override
protected void onResume() {
super.onResume();
SurfaceHolder surfaceHolder = surfaceView.getHolder();
if (hasSurface) {
initCamera(surfaceHolder);
} else {
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
}
decodeFormats = null;
characterSet = null;
playBeep = true;
AudioManager audioService = (AudioManager) getSystemService(AUDIO_SERVICE);
if (audioService.getRingerMode() != AudioManager.RINGER_MODE_NORMAL) {
playBeep = false;
}
initBeepSound();
vibrate = true;
}
@Override
protected void onPause() {
super.onPause();
if (handler != null) {
handler.quitSynchronously();
handler = null;
}
CameraManager.get().closeDriver();
}
@Override
protected void onDestroy() {
inactivityTimer.shutdown();
super.onDestroy();
}
public static final String RESULT_QRCODE_STRING = "RESULT_QRCODE_STRING";
/**
* Handler scan result
* @param result
* @param barcode
*/
public void handleDecode(Result result, Bitmap barcode) {
inactivityTimer.onActivity();
playBeepSoundAndVibrate();
String resultString = result.getText();
//FIXME
if (resultString.equals("")) {
Toast.makeText(CaptureActivity.this, "Scan failed!", Toast.LENGTH_SHORT).show();
}
setResult(RESULT_OK, new Intent().putExtra(RESULT_QRCODE_STRING, resultString));
finish();
}
private void initCamera(SurfaceHolder surfaceHolder) {
try {
CameraManager.get().openDriver(surfaceHolder);
} catch (IOException ioe) {
return;
} catch (RuntimeException e) {
return;
}
if (handler == null) {
handler = new CaptureActivityHandler(this, decodeFormats,
characterSet, viewfinderView, this);
}
}
@Override
public void drawViewfinder() {
viewfinderView.drawViewfinder(); 
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height) {
}
@Override
public void surfaceCreated(SurfaceHolder holder) {
if (!hasSurface) {
hasSurface = true;
initCamera(holder);
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
hasSurface = false;
}
public Handler getHandler() {
return handler;
}
private void initBeepSound() {
if (playBeep && mediaPlayer == null) {
// The volume on STREAM_SYSTEM is not adjustable, and users found it
// too loud,
// so we now play on the music stream.
setVolumeControlStream(AudioManager.STREAM_MUSIC);
mediaPlayer = new MediaPlayer();
mediaPlayer.setAudioStreamType(AudioManager.STREAM_MUSIC);
mediaPlayer.setOnCompletionListener(beepListener);
AssetFileDescriptor file = getResources().openRawResourceFd(
R.raw.beep);
try {
mediaPlayer.setDataSource(file.getFileDescriptor(),
file.getStartOffset(), file.getLength());
file.close();
mediaPlayer.setVolume(BEEP_VOLUME, BEEP_VOLUME);
mediaPlayer.prepare();
} catch (IOException e) {
mediaPlayer = null;
}
}
}
private static final long VIBRATE_DURATION = L;
private void playBeepSoundAndVibrate() {
if (playBeep && mediaPlayer != null) {
mediaPlayer.start();
}
if (vibrate) {
Vibrator vibrator = (Vibrator) getSystemService(VIBRATOR_SERVICE);
vibrator.vibrate(VIBRATE_DURATION);
}
}
/**
* When the beep has finished playing, rewind to queue up another one.
*/
private final OnCompletionListener beepListener = new OnCompletionListener() {
public void onCompletion(MediaPlayer mediaPlayer) {
mediaPlayer.seekTo();
}
};
}

메소드 사용: CaptureActivity를 상속하고 setContentView 메소드 다음에 init 메소드를 호출하는 새 활동을 작성하십시오.
예:

CameraScanActivity.java

package zuo.biao.activity;
import zuo.biao.R;
import zuo.biao.library.interfaces.OnBottomDragListener;
import zuo.biao.util.ActivityUtil;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import com.zxing.activity.CaptureActivity;
import com.zxing.camera.CameraManager;
import com.zxing.view.ViewfinderView;
/**扫描二维码Activity
* @author Lemon
* @use 参考zuo.biao.library.ModelActivity
*/
public class CameraScanActivity extends CaptureActivity implements Callback, OnClickListener, OnBottomDragListener {
public static final String TAG = "CameraScanActivity";
//启动方法<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
/**启动这个Activity的Intent
* @param context
* @param title
* @return
*/
public static Intent createIntent(Context context) {
return new Intent(context, CameraScanActivity.class);
}
//启动方法>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.camera_scan_activity);
init(this, (SurfaceView) findViewById(R.id.svCameraScan), (ViewfinderView) findViewById(R.id.vfvCameraScan));
//功能归类分区方法，必须调用<<<<<<<<<<
initView();
initData();
initListener();
//功能归类分区方法，必须调用>>>>>>>>>>
}
//UI显示区(操作UI，但不存在数据获取或处理代码，也不存在事件监听代码)<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
public void initView() {//必须调用
}
//UI显示区(操作UI，但不存在数据获取或处理代码，也不存在事件监听代码)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//data数据区(存在数据获取或处理代码，但不存在事件监听代码)<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
public void initData() {//必须调用
}
//data数据区(存在数据获取或处理代码，但不存在事件监听代码)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//listener事件监听区(只要存在事件监听代码就是)<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
public void initListener() {//必须调用
findViewById(R.id.tvCameraScanReturn).setOnClickListener(this);
findViewById(R.id.ivCameraScanReturn).setOnClickListener(this);
findViewById(R.id.ivCameraScanLight).setOnClickListener(this);
findViewById(R.id.ivCameraScanMyQRCode).setOnClickListener(this);
}
//系统自带监听方法<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
@Override
public void onDragBottom(boolean rightToLeft) {
if (rightToLeft) {
return;
}
finish();
}
@Override
public void onClick(View v) {
switch (v.getId()) {
case R.id.tvCameraScanReturn:
case R.id.ivCameraScanReturn:
onDragBottom(false);
break;
case R.id.ivCameraScanLight:
switchLight(! isOpen);
break;
case R.id.ivCameraScanMyQRCode:
//
break;
default:
break;
}
}
private boolean isOpen = false;
/**打开或关闭闪关灯
* @param open
*/
private void switchLight(boolean open) {
if (open == isOpen) {
return;
}
isOpen = CameraManager.get().switchLight(open);
}
//类相关监听<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
//类相关监听>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//系统自带监听方法>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//listener事件监听区(只要存在事件监听代码就是)>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
//内部类,尽量少用<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
//内部类,尽量少用>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
}

CameraScanActivity 레이아웃 파일 Camera_scan_activity.xml

<?xml version="." encoding="utf-"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
style="@style/activity_page" >
<SurfaceView
android:id="@+id/svCameraScan"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_gravity="center" />
<!-- 必须在最底层，且不能指定宽高，否则扫描读取很难实现 -->
<com.zxing.view.ViewfinderView
android:id="@+id/vfvCameraScan"
android:layout_width="match_parent"
android:layout_height="match_parent" />
<LinearLayout
style="@style/ll_vertical_match_match"
android:baselineAligned="false" >
<RelativeLayout
style="@style/topbar_bg"
android:background="@color/white_alpha" >
<TextView
android:id="@+id/tvCameraScanReturn"
style="@style/topbar_left_btn"
android:text=" " />
<TextView
style="@style/topbar_title"
android:layout_centerHorizontal="true"
android:text="扫一扫" />
</RelativeLayout>
<LinearLayout
style="@style/ll_vertical_match_match"
android:layout_gravity="center_horizontal"
android:layout_weight="" >
<TextView
style="@style/text_middle_white"
android:layout_margin="dp"
android:text="@string/camera_scan_remind" />
</LinearLayout>
<LinearLayout
style="@style/ll_horizontal_match_wrap"
android:layout_gravity="bottom"
android:background="@color/white_alpha"
android:gravity="center" >
<LinearLayout
style="@style/ll_vertical_wrap_wrap"
android:layout_margin="dp"
android:paddingBottom="dp"
android:paddingLeft="dp"
android:paddingRight="dp"
android:paddingTop="dp" >
<ImageView
android:id="@+id/ivCameraScanReturn"
style="@style/wrap_wrap"
android:background="@drawable/cilcle_gray_to_white"
android:padding="dp"
android:src="@drawable/back_black_light" />
<TextView
style="@style/text_small"
android:layout_marginTop="dp"
android:text="返回" />
</LinearLayout>
<LinearLayout
style="@style/ll_vertical_wrap_wrap"
android:layout_margin="dp"
android:paddingBottom="dp"
android:paddingLeft="dp"
android:paddingRight="dp"
android:paddingTop="dp" >
<ImageView
android:id="@+id/ivCameraScanLight"
style="@style/wrap_wrap"
android:background="@drawable/cilcle_gray_to_white"
android:padding="dp"
android:src="@drawable/flash_light" />
<TextView
style="@style/text_small"
android:layout_marginTop="dp"
android:text="开灯/关灯" />
</LinearLayout>
<LinearLayout
style="@style/ll_vertical_wrap_wrap"
android:layout_margin="dp"
android:paddingBottom="dp"
android:paddingLeft="dp"
android:paddingRight="dp"
android:paddingTop="dp" >
<ImageView
android:id="@+id/ivCameraScanMyQRCode"
style="@style/wrap_wrap"
android:background="@drawable/cilcle_gray_to_white"
android:padding="dp"
android:src="@drawable/qrcode" />
<TextView
style="@style/text_small"
android:layout_marginTop="dp"
android:text="我的名片" />
</LinearLayout>
</LinearLayout>
</LinearLayout>
</FrameLayout>

레이아웃 파일은 ZBLibrary에서 일부 스타일, 색상 등을 사용합니다. , 이 레이아웃만 있으면 약간의 오류가 발생합니다. 새 레이아웃 파일을 직접 만들고 ViewfinderView를 가장 바깥쪽 레이아웃 파일에 넣기만 하면 됩니다. 물론, 아래 첨부된 소스코드를 다운로드 받으신 후에는 문제가 없을 것입니다.

그런데 AndroidManifest.xml에 다음 권한을 추가하는 것을 잊지 마세요:

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

첨부된 소스 코드(사용 지침 포함)

GitHub 소스 코드 https://github.com/TommyLemon/Android-ZBLibrary

오픈 소스 중국어 소스 코드 http://git.oschina.net/Lemon19950301/Android-ZBLibrary

Android 개발 프레임워크의 ZXing QR 코드 스캐닝 인터페이스를 사용자 정의하고 뷰파인더 확장 문제를 해결하는 방법은 여기까지입니다. 위 내용이 조금 길다면 인내심을 가지고 읽어보시기 바랍니다. 질문이 있으시면 메시지를 남겨주세요. 편집자가 제때에 답변해 드릴 것입니다. PHP 중국어 웹사이트에 대한 귀하의 지원에 진심으로 감사드립니다!

Android 개발 프레임워크의 ZXing QR 코드 스캐닝 인터페이스 사용자 정의 및 뷰파인더 확장 문제 해결에 대한 자세한 관련 기사를 보려면 PHP 중국어 웹사이트에 주목하세요!