Camera2拍照（备忘)

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首先上布局代码：

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:orientation="vertical"    android:layout_marginLeft="@dimen/fab_margin"    android:layout_marginRight="@dimen/fab_margin"    xmlns:app="http://schemas.android.com/apk/res-auto"    app:layout_behavior="@string/appbar_scrolling_view_behavior"    android:fitsSystemWindows="true">    <TextureView        android:id="@+id/tv_textview"        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="3" />    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="0dp"        android:layout_weight="1">        <ImageView            android:id="@+id/iv_Thumbnail"            android:layout_width="50dp"            android:layout_height="70dp"            android:layout_alignParentLeft="true"            android:background="@drawable/bg_border"            android:visibility="gone" />        <ImageView            android:id="@+id/iv_Thumbnail2"            android:layout_width="50dp"            android:layout_height="70dp"            android:layout_toRightOf="@id/iv_Thumbnail"            android:layout_alignTop="@id/iv_Thumbnail"            android:layout_marginLeft="5dp"            android:visibility="gone" />        <ImageView            android:id="@+id/iv_Thumbnail3"            android:layout_width="50dp"            android:layout_height="70dp"            android:layout_toRightOf="@id/iv_Thumbnail2"            android:layout_alignTop="@id/iv_Thumbnail2"            android:layout_marginLeft="5dp"            android:visibility="gone" />        <Button            android:id="@+id/btn_takepic"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_alignParentRight="true"            android:text="拍照" />        <Button            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="@string/finishAndback"            android:layout_below="@id/btn_takepic"            android:layout_alignParentRight="true"            />    </RelativeLayout></LinearLayout>

Activity代码

import android.Manifest;import android.content.Context;import android.content.pm.PackageManager;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.ImageFormat;import android.graphics.SurfaceTexture;import android.graphics.drawable.BitmapDrawable;import android.graphics.drawable.Drawable;import android.hardware.camera2.CameraAccessException;import android.hardware.camera2.CameraCaptureSession;import android.hardware.camera2.CameraCharacteristics;import android.hardware.camera2.CameraDevice;import android.hardware.camera2.CameraManager;import android.hardware.camera2.CaptureRequest;import android.hardware.camera2.CaptureResult;import android.hardware.camera2.TotalCaptureResult;import android.hardware.camera2.params.StreamConfigurationMap;import android.media.AudioAttributes;import android.media.Image;import android.media.ImageReader;import android.media.Ringtone;import android.media.RingtoneManager;import android.net.Uri;import android.os.Bundle;import android.os.Handler;import android.os.HandlerThread;import android.support.v4.app.ActivityCompat;import android.util.Log;import android.util.Size;import android.util.SparseIntArray;import android.view.Surface;import android.view.TextureView;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.Toast;import java.nio.ByteBuffer;import java.util.ArrayList;import java.util.Arrays;import java.util.Collections;import java.util.List;import cn.com.zifar.Utility.ConstHelper;import static cn.com.zifar.mobileforpatrol.R.id.iv_Thumbnail;public class MyCameraActivity extends MyBaseActivity{    TextureView mTextureView;    ImageView mThumbnail;    Button mButton;    Handler mHandler,childHandler;    ImageReader mImageReader;    CaptureRequest.Builder mPreViewBuidler;    CameraCaptureSession mCameraSession;    CameraCharacteristics mCameraCharacteristics;    Ringtone ringtone;    private Size mPreViewSize;    private CameraDevice CameraDevice;    private CameraManager manager;    private String cameraid;    private Context context;    private List<Bitmap> MypicList;    private List<ImageView> MyImgList;    private static final SparseIntArray ORIENTATIONS = new SparseIntArray();    ///为了使照片竖直显示    static {        ORIENTATIONS.append(Surface.ROTATION_0, 90);        ORIENTATIONS.append(Surface.ROTATION_90, 0);        ORIENTATIONS.append(Surface.ROTATION_180, 270);        ORIENTATIONS.append(Surface.ROTATION_270, 180);    }    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_my_camera);        InitMyActivity();        InitTools();        context=this;        MypicList=new ArrayList<>();        FindView();    }    /**     * 显示图片     */    private void ShowImg(){        runOnUiThread(new Runnable() {            @Override            public void run() {                if((MypicList!=null &&MypicList.size()>0) && (MyImgList!=null && MyImgList.size()>0))                    for(int i=0;i<MyImgList.size();i++){                        android.widget.ImageView img=MyImgList.get(i);                        if(i>=MypicList.size()){                            img.setVisibility(View.GONE);                            break;                        }                        Bitmap bitmap=MypicList.get(i);                        if(bitmap!=null){                            img.setImageBitmap(bitmap);                            img.setVisibility(View.VISIBLE);                        }                    }            }        });    }    /**     * 删除图片     * @param imageView     */    private void DelImg(ImageView imageView){        int id=imageView.getId();        int index=0;        switch(id){            case R.id.iv_Thumbnail:                index=0;                break;            case R.id.iv_Thumbnail2:                index=1;                break;            case R.id.iv_Thumbnail3:                index=2;                break;        }        Drawable drawable = imageView.getDrawable();        if (drawable != null && drawable instanceof BitmapDrawable){            BitmapDrawable bitmapDrawable = (BitmapDrawable) drawable;            Bitmap bitmap = bitmapDrawable.getBitmap();            if (bitmap != null && !bitmap.isRecycled()) {                bitmap.recycle();            }            MypicList.set(index,null);        }        ClearNullBitmap();        //imageView.setWillNotDraw(true);        ShowImg();    }    private void ClearNullBitmap(){        List<Bitmap> nlist=new ArrayList<>();        if(MypicList!=null){            for(Bitmap bitmap:MypicList){                if(bitmap==null)continue;                nlist.add(bitmap);            }        }        MypicList=nlist;    }    private final  class ImageViewClickListener implements ImageView.OnLongClickListener{        @Override        public boolean onLongClick(View v) {            DelImg((ImageView) v);            return true;        }    }    private void FindView(){        mTextureView = (TextureView) findViewById(R.id.tv_textview);        mButton = (Button) findViewById(R.id.btn_takepic);        MyImgList=new ArrayList<>();        ImageView mThumbnail = (ImageView) findViewById(iv_Thumbnail);        mThumbnail.setOnLongClickListener(new ImageViewClickListener());        MyImgList.add(mThumbnail);        ImageView iv_Thumbnail2=(ImageView)findViewById(R.id.iv_Thumbnail2);        iv_Thumbnail2.setOnLongClickListener(new ImageViewClickListener());        MyImgList.add(iv_Thumbnail2);        ImageView iv_Thumbnail3=(ImageView)findViewById(R.id.iv_Thumbnail3);        iv_Thumbnail3.setOnLongClickListener(new ImageViewClickListener());        MyImgList.add(iv_Thumbnail3);        ShowImg();        //初始化相机布局        mTextureView.setSurfaceTextureListener(mSurfacetextlistener);        //初始化拍照的声音        ringtone = RingtoneManager.getRingtone(MyCameraActivity.this, Uri.parse("file:///system/media/audio/ui/camera_click.ogg"));        AudioAttributes.Builder attr = new AudioAttributes.Builder();        attr.setContentType(AudioAttributes.CONTENT_TYPE_SONIFICATION);        ringtone.setAudioAttributes(attr.build());        mButton.setOnClickListener(new View.OnClickListener() {            @Override            public void onClick(View v) {                if(MypicList.size()>=3){                    Toast.makeText(context,R.string.morethanmax,Toast.LENGTH_SHORT).show();                    return;                }                shootSound();                try {                    if(CameraDevice==null)return;                    final CaptureRequest.Builder captureRequestBuilder;                    captureRequestBuilder = CameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_STILL_CAPTURE);                    // 将imageReader的surface作为CaptureRequest.Builder的目标                    captureRequestBuilder.addTarget(mImageReader.getSurface());                    // 自动对焦                    captureRequestBuilder.set(CaptureRequest.CONTROL_AF_MODE, CaptureRequest.CONTROL_AF_MODE_CONTINUOUS_PICTURE);                    // 自动曝光                    captureRequestBuilder.set(CaptureRequest.CONTROL_AE_MODE, CaptureRequest.CONTROL_AE_MODE_ON_AUTO_FLASH);                    // 获取手机方向                    int rotation = getWindowManager().getDefaultDisplay().getRotation();                    // 根据设备方向计算设置照片的方向                    captureRequestBuilder.set(CaptureRequest.JPEG_ORIENTATION, ORIENTATIONS.get(rotation));                    //拍照                    CaptureRequest mCaptureRequest = captureRequestBuilder.build();                    mCameraSession.capture(mCaptureRequest, null, childHandler);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    @Override    protected void onDestroy() {        if(CameraDevice!=null){            CameraDevice.close();            CameraDevice=null;        }        super.onDestroy();    }    /**     * 播放系统的拍照的声音     */    public void shootSound() {        ringtone.stop();        ringtone.play();    }    //打开相机时候的监听器，通过他可以得到相机实例，这个实例可以创建请求建造者    private CameraDevice.StateCallback cameraOpenCallBack = new CameraDevice.StateCallback() {        @Override        public void onOpened(CameraDevice cameraDevice) {            CameraDevice=cameraDevice;            Log.d(ConstHelper.TagName, "相机已经打开");            try {                mPreViewBuidler = cameraDevice.createCaptureRequest(CameraDevice.TEMPLATE_PREVIEW);                SurfaceTexture texture = mTextureView.getSurfaceTexture();                texture.setDefaultBufferSize(mPreViewSize.getWidth(), mPreViewSize.getHeight());                Surface surface = new Surface(texture);                mPreViewBuidler.addTarget(surface);                cameraDevice.createCaptureSession(Arrays.asList(surface, mImageReader.getSurface()), mSessionStateCallBack, childHandler);            } catch (Exception e) {                e.printStackTrace();            }        }        @Override        public void onDisconnected(CameraDevice cameraDevice) {            Log.d(ConstHelper.TagName, "相机连接断开");        }        @Override        public void onError(CameraDevice cameraDevice, int i) {            Log.d(ConstHelper.TagName, "相机打开失败");        }    };    //相机会话的监听器，通过他得到mCameraSession对象，这个对象可以用来发送预览和拍照请求    private CameraCaptureSession.StateCallback mSessionStateCallBack = new CameraCaptureSession.StateCallback() {        @Override        public void onConfigured(CameraCaptureSession cameraCaptureSession) {            try {                mCameraSession = cameraCaptureSession;                mCameraSession.setRepeatingRequest(mPreViewBuidler.build(), mCaptureCallBack, childHandler);            } catch (CameraAccessException e) {                e.printStackTrace();            }        }        @Override        public void onConfigureFailed(CameraCaptureSession cameraCaptureSession) {        }    };    private CameraCaptureSession.CaptureCallback mCaptureCallBack=new CameraCaptureSession.CaptureCallback() {        @Override        public void onCaptureCompleted(CameraCaptureSession session, CaptureRequest request, TotalCaptureResult result) {            super.onCaptureCompleted(session, request, result);        }        @Override        public void onCaptureProgressed(CameraCaptureSession session, CaptureRequest request, CaptureResult partialResult) {            super.onCaptureProgressed(session, request, partialResult);        }    };    private TextureView.SurfaceTextureListener mSurfacetextlistener=new TextureView.SurfaceTextureListener(){        @Override        public void onSurfaceTextureAvailable(SurfaceTexture surface, int width, int height) {            HandlerThread thread = new HandlerThread("Ceamera3");            thread.start();            mHandler = new Handler(getMainLooper());            childHandler=new Handler(thread.getLooper());            manager = (CameraManager) getSystemService(Context.CAMERA_SERVICE);            cameraid = CameraCharacteristics.LENS_FACING_FRONT + "";            try {                mCameraCharacteristics = manager.getCameraCharacteristics(cameraid);                StreamConfigurationMap map = mCameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP);                Size largest = Collections.max(Arrays.asList(map.getOutputSizes(ImageFormat.JPEG)), new CompareSizeByArea());                mPreViewSize = map.getOutputSizes(SurfaceTexture.class)[0];                mImageReader = ImageReader.newInstance(largest.getWidth(), largest.getHeight(), ImageFormat.JPEG, 5);                mImageReader.setOnImageAvailableListener(new ImageReader.OnImageAvailableListener() {                    @Override                    public void onImageAvailable(final ImageReader reader) {                        try{                            Image image = reader.acquireNextImage();                            ByteBuffer buffer = image.getPlanes()[0].getBuffer();                            byte[] bytes = new byte[buffer.remaining()];                            buffer.get(bytes);//由缓冲区存入字节数组                            Bitmap bitmap = BitmapFactory.decodeByteArray(bytes, 0, bytes.length);                            if(bitmap!=null)                            {                                MypicList.add(bitmap);                                ShowImg();                            }                            image.close();                        }catch (Exception ex){                            ex.printStackTrace();                        }                    }                }, mHandler);                if (ActivityCompat.checkSelfPermission(context, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {                    ActivityCompat.requestPermissions(MyCameraActivity.this,new String[]{Manifest.permission.CAMERA},PackageManager.PERMISSION_GRANTED);                }                manager.openCamera(cameraid, cameraOpenCallBack, mHandler);            } catch (CameraAccessException e) {                e.printStackTrace();            }        }        @Override        public void onSurfaceTextureSizeChanged(SurfaceTexture surface, int width, int height) {        }        @Override        public boolean onSurfaceTextureDestroyed(SurfaceTexture surface) {            if(CameraDevice!=null){                CameraDevice.close();                CameraDevice=null;            }            return false;        }        @Override        public void onSurfaceTextureUpdated(SurfaceTexture surface) {        }    };}

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