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YooJia.Chen
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126 changes: 126 additions & 0 deletions
126
zxing/src/main/java/com/github/yoojia/zxing/camera/CameraController.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| package com.github.yoojia.zxing.camera; | ||
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| import android.graphics.Bitmap; | ||
| import android.graphics.BitmapFactory; | ||
| import android.graphics.Matrix; | ||
| import android.graphics.Rect; | ||
| import android.graphics.YuvImage; | ||
| import android.hardware.Camera; | ||
| import android.util.Log; | ||
| import android.view.SurfaceHolder; | ||
| import android.view.SurfaceView; | ||
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| import java.io.ByteArrayOutputStream; | ||
| import java.io.IOException; | ||
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| /** | ||
| * @author 陈小锅 (yoojia.chen@gmail.com) | ||
| * @since 1.0 | ||
| */ | ||
| public class CameraController { | ||
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| private final static String TAG = "CAMERAS"; | ||
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| private final CameraManager mCameraManager; | ||
| private final SurfaceView mSurfaceView; | ||
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| private final CameraSurfaceCallback mCameraSurfaceCallback = new CameraSurfaceCallback() { | ||
| @Override | ||
| public void surfaceCreated(SurfaceHolder holder) { | ||
| initCamera(holder); | ||
| } | ||
| }; | ||
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| private final AutoFocusListener mAutoFocusListener = new AutoFocusListener() { | ||
| @Override | ||
| public void onFocus(boolean focusSuccess) { | ||
| // 对焦成功后，请求触发生成 **一次** 预览图片 | ||
| if (focusSuccess) { | ||
| mCameraManager.requestPreview(mPreviewCallback); | ||
| } | ||
| } | ||
| }; | ||
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| private Camera.PreviewCallback mPreviewCallback; | ||
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| public CameraController(SurfaceView surfaceView) { | ||
| mCameraManager = new CameraManager(surfaceView.getContext().getApplicationContext()); | ||
| mSurfaceView = surfaceView; | ||
| } | ||
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| /** | ||
| * 跟随Activity的生命周期 | ||
| */ | ||
| public void resume(){ | ||
| final SurfaceHolder holder = mSurfaceView.getHolder(); | ||
| holder.addCallback(mCameraSurfaceCallback); | ||
| } | ||
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| /** | ||
| * 跟随Activity的生命周期 | ||
| */ | ||
| public void pause(){ | ||
| final SurfaceHolder holder = mSurfaceView.getHolder(); | ||
| holder.removeCallback(mCameraSurfaceCallback); | ||
| mCameraManager.stopPreview(); | ||
| mCameraManager.closeDriver(); | ||
| } | ||
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| public void requestFocus(){ | ||
| mCameraManager.getAutoFocusManager().requestAutoFocus(); | ||
| } | ||
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| public CameraManager getCameraManager() { | ||
| return mCameraManager; | ||
| } | ||
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| public void setPreviewCallback(Camera.PreviewCallback previewCallback) { | ||
| mPreviewCallback = previewCallback; | ||
| } | ||
|
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| /** | ||
| * 生成一张预览图 | ||
| */ | ||
| public Bitmap capture(CameraPreview cameraPreview){ | ||
| final Camera.Parameters parameters = cameraPreview.camera.getParameters(); | ||
| final int width = parameters.getPreviewSize().width; | ||
| final int height = parameters.getPreviewSize().height; | ||
| final YuvImage yuv = new YuvImage(cameraPreview.data, parameters.getPreviewFormat(), width, height, null); | ||
| final ByteArrayOutputStream out = new ByteArrayOutputStream(); | ||
| yuv.compressToJpeg(new Rect(0, 0, width, height), 100, out);// Best | ||
| final byte[] bytes = out.toByteArray(); | ||
| final Bitmap src = BitmapFactory.decodeByteArray(bytes, 0, bytes.length); | ||
| final Matrix matrix = new Matrix(); | ||
| matrix.setRotate(90); | ||
| final int originWidth = src.getWidth(); | ||
| final int originHeight = src.getHeight(); | ||
| final int targetWH = originWidth > originHeight ? originHeight : originWidth; | ||
| final int offsetX = originWidth > originHeight ? (originWidth - originHeight): 0; | ||
| final int offsetY = originWidth > originHeight ? 0 : (originHeight - originWidth); | ||
| return Bitmap.createBitmap(src, offsetX, offsetY, targetWH, targetWH, matrix, true); | ||
| } | ||
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| private void initCamera(SurfaceHolder holder){ | ||
| if (mCameraManager.isOpen()){ | ||
| return; | ||
| } | ||
| try { | ||
| mCameraManager.openDriver(holder); | ||
| }catch (IOException ioe) { | ||
| Log.w(TAG, ioe); | ||
| return; | ||
| } | ||
| mCameraManager.startPreview(mAutoFocusListener); | ||
| } | ||
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| public static final class CameraPreview{ | ||
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| private final byte[] data; | ||
| private final Camera camera; | ||
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| public CameraPreview(byte[] data, Camera camera) { | ||
| this.data = data; | ||
| this.camera = camera; | ||
| } | ||
| } | ||
| } |
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