/*
* Copyright (C) 2008 ZXing authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.zijunlin.Zxing.Demo.camera;
import android.content.Context;
import android.content.SharedPreferences;
import android.graphics.PixelFormat;
import android.graphics.Point;
import android.graphics.Rect;
import android.hardware.Camera;
import android.os.Build;
import android.os.Handler;
import android.preference.PreferenceManager;
import android.util.Log;
import android.view.SurfaceHolder;
import java.io.IOException;
/**
* This object wraps the Camera service object and expects to be the only one talking to it. The
* implementation encapsulates the steps needed to take preview-sized images, which are used for
* both preview and decoding.
*
* @author dswitkin@google.com (Daniel Switkin)
*/
public final class CameraManager {
private static final String TAG = CameraManager.class.getSimpleName();
private static final int MIN_FRAME_WIDTH = 240;
private static final int MIN_FRAME_HEIGHT = 240;
private static final int MAX_FRAME_WIDTH = 480;
private static final int MAX_FRAME_HEIGHT = 360;
private static CameraManager cameraManager;
static final int SDK_INT; // Later we can use Build.VERSION.SDK_INT
static {
int sdkInt;
try {
sdkInt = Integer.parseInt(Build.VERSION.SDK);
} catch (NumberFormatException nfe) {
// Just to be safe
sdkInt = 10000;
}
SDK_INT = sdkInt;
}
private final Context context;
private final CameraConfigurationManager configManager;
private Camera camera;
private Rect framingRect;
private Rect framingRectInPreview;
private boolean initialized;
private boolean previewing;
private final boolean useOneShotPreviewCallback;
/**
* Preview frames are delivered here, which we pass on to the registered handler. Make sure to
* clear the handler so it will only receive one message.
*/
private final PreviewCallback previewCallback;
/** Autofocus callbacks arrive here, and are dispatched to the Handler which requested them. */
private final AutoFocusCallback autoFocusCallback;
/**
* Initializes this static object with the Context of the calling Activity.
*
* @param context The Activity which wants to use the camera.
*/
public static void init(Context context) {
if (cameraManager == null) {
cameraManager = new CameraManager(context);
}
}
/**
* Gets the CameraManager singleton instance.
*
* @return A reference to the CameraManager singleton.
*/
public static CameraManager get() {
return cameraManager;
}
private CameraManager(Context context) {
this.context = context;
this.configManager = new CameraConfigurationManager(context);
// Camera.setOneShotPreviewCallback() has a race condition in Cupcake, so we use the older
// Camera.setPreviewCallback() on 1.5 and earlier. For Donut and later, we need to use
// the more efficient one shot callback, as the older one can swamp the system and cause it
// to run out of memory. We can't use SDK_INT because it was introduced in the Donut SDK.
//useOneShotPreviewCallback = Integer.parseInt(Build.VERSION.SDK) > Build.VERSION_CODES.CUPCAKE;
useOneShotPreviewCallback = Integer.parseInt(Build.VERSION.SDK) > 3; // 3 = Cupcake
previewCallback = new PreviewCallback(configManager, useOneShotPreviewCallback);
autoFocusCallback = new AutoFocusCallback();
}
/**
* Opens the camera driver and initializes the hardware parameters.
*
* @param holder The surface object which the camera will draw preview frames into.
* @throws IOException Indicates the camera driver failed to open.
*/
public void openDriver(SurfaceHolder holder) throws IOException {
if (camera == null) {
camera = Camera.open();
if (camera == null) {
throw new IOException();
}
camera.setPreviewDisplay(holder);
if (!initialized) {
initialized = true;
configManager.initFromCameraParameters(camera);
}
configManager.setDesiredCameraParameters(camera);
// SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context);
//是否使用前灯
// if (prefs.getBoolean(PreferencesActivity.KEY_FRONT_LIGHT, false)) {
// FlashlightManager.enableFlashlight();
// }
FlashlightManager.enableFlashlight();
}
}
/**
* Closes the camera driver if still in use.
*/
public void closeDriver() {
if (camera != null) {
FlashlightManager.disableFlashlight();
camera.release();
camera = null;
}
}
/**
* Asks the camera hardware to begin drawing preview frames to the screen.
*/
public void startPreview() {
if (camera != null && !previewing) {
camera.startPreview();
previewing = true;
}
}
/**
* Tells the camera to stop drawing preview frames.
*/
public void stopPreview() {
if (camera != null && previewing) {
if (!useOneShotPreviewCallback) {
camera.setPreviewCallback(null);
}
camera.stopPreview();
previewCallback.setHandler(null, 0);
autoFocusCallback.setHandler(null, 0);
previewing = false;
}
}
/**
* A single preview frame will be returned to the handler supplied. The data will arrive as byte[]
* in the message.obj field, with width and height encoded as message.arg1 and message.arg2,
* respectively.
*
* @param handler The handler to send the message to.
* @param message The what field of the message to be sent.
*/
public void requestPreviewFrame(Handler handler, int message) {
if (camera != null && previewing) {
previewCallback.setHandler(handler, message);
if (useOneShotPreviewCallback) {
camera.setOneShotPreviewCallback(previewCallback);
} else {
camera.setPreviewCallback(previewCallback);
}
}
}
/**
* Asks the camera hardware to perform an autofocus.
*
* @param handler The Handler to notify when the autofocus completes.
* @param message The message to deliver.
*/
public void requestAutoFocus(Handler handler, int message) {
if (camera != null && previewing) {
autoFocusCallback.setHandler(handler, message);
//Log.d(TAG, "Requesting auto-focus callback");
camera.autoFocus(autoFocusCallback);
}
}
/**
* Calculates the framing rect which the UI should draw to show the user where to place the
* barcode. This target helps with alignment as well as forces the user to hold the device
* far enough away to ensure the image will be in focus.
*
* @return The rectangle to draw on screen in window coordinates.
*/
public Rect getFramingRect() {
Point screenResolution = configManager.getScreenResolution();
if (framingRect == null) {
if (camera == null) {
return null;
}
int width = screenResolution.x * 3 / 4;
if (width < MIN_FRAME_WIDTH) {
width = MIN_FRAME_WIDTH;
} else if (width > MAX_FRAME_WIDTH) {
width = MAX_FRAME_WIDTH;
}
int height = screenResolution.y * 3 / 4;
if (height < MIN_FRAME_HEIGHT) {
height = MIN_FRAME_HEIGHT;
} else if (height > MAX_FRAME_HEIGHT) {
height = MAX_FRAME_HEIGHT;
}
int leftOffset = (screenResolution.x - width) / 2;
int topOffset = (screenResolution.y - height) / 2;
framingRect = new Rect(leftOffset, topOffset, leftOffset + width, topOffset + he
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收起资源包目录
条形码android_demo (101个子文件)
resources.ap_ 20KB
ZXingDemo.apk 177KB
proguard.cfg 1KB
CameraConfigurationManager.class 7KB
CameraConfigurationManager.class 7KB
CaptureActivity.class 7KB
CaptureActivity.class 7KB
CameraManager.class 6KB
CameraManager.class 6KB
FlashlightManager.class 4KB
FlashlightManager.class 4KB
CaptureActivityHandler.class 4KB
CaptureActivityHandler.class 4KB
ViewfinderView.class 4KB
ViewfinderView.class 4KB
DecodeHandler.class 4KB
DecodeHandler.class 4KB
DecodeFormatManager.class 4KB
DecodeFormatManager.class 4KB
PlanarYUVLuminanceSource.class 3KB
PlanarYUVLuminanceSource.class 3KB
DecodeThread.class 3KB
DecodeThread.class 3KB
PreviewCallback.class 2KB
PreviewCallback.class 2KB
InactivityTimer.class 2KB
InactivityTimer.class 2KB
AutoFocusCallback.class 2KB
AutoFocusCallback.class 2KB
CaptureActivityHandler$State.class 1KB
CaptureActivityHandler$State.class 1KB
R$color.class 1KB
R$color.class 1KB
FinishListener.class 1KB
FinishListener.class 1KB
InactivityTimer$DaemonThreadFactory.class 963B
InactivityTimer$DaemonThreadFactory.class 963B
R$id.class 953B
R$id.class 953B
Intents$Scan.class 891B
Intents$Scan.class 891B
CaptureActivity$1.class 863B
CaptureActivity$1.class 863B
ViewfinderResultPointCallback.class 838B
ViewfinderResultPointCallback.class 838B
Intents.class 717B
Intents.class 717B
R.class 668B
R.class 668B
Intents$Encode.class 646B
Intents$Encode.class 646B
Intents$SearchBookContents.class 625B
Intents$WifiConnect.class 625B
Intents$SearchBookContents.class 625B
Intents$WifiConnect.class 625B
Intents$Share.class 518B
Intents$Share.class 518B
R$string.class 442B
R$string.class 442B
R$drawable.class 415B
R$drawable.class 415B
R$layout.class 409B
R$layout.class 409B
R$raw.class 400B
R$raw.class 400B
R$attr.class 355B
R$attr.class 355B
.classpath 352B
classes.dex 336KB
core-1.6-SNAPSHOT.jar 325KB
CameraManager.java 11KB
CameraConfigurationManager.java 9KB
Intents.java 6KB
ViewfinderView.java 6KB
CaptureActivity.java 5KB
FlashlightManager.java 5KB
CaptureActivityHandler.java 4KB
PlanarYUVLuminanceSource.java 4KB
DecodeFormatManager.java 4KB
DecodeThread.java 3KB
DecodeHandler.java 3KB
R.java 3KB
InactivityTimer.java 2KB
PreviewCallback.java 2KB
AutoFocusCallback.java 2KB
FinishListener.java 1KB
ViewfinderResultPointCallback.java 1KB
beep.ogg 6KB
icon.png 4KB
icon.png 4KB
icon.png 3KB
icon.png 2KB
icon.png 2KB
icon.png 2KB
.project 1KB
project.properties 360B
colors.xml 2KB
main.xml 1KB
AndroidManifest.xml 1KB
ids.xml 1KB
共 101 条
- 1
- 2
资源评论
- vmvm5552014-12-10,没办法跑,不过能看看源码也不错了
- qxhaiandroid2013-10-24不能运行,报错,不过还是可以作为参考的,谢谢了。
- lxz198802042014-02-18资源不错, 就是编译通过不了 另外这个貌似只是截图
- grennhand2014-10-15做个参考,毕竟免费,但不能用
chen88358323
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