android相机 调用camera拍照,并保存在sd卡指定位置

  次阅读 来源:互联网(转载协议) 2015-09-29 10:06 我要评论(0)

调用camera拍照,并保存在sd卡指定位置。

public class EX07_16 extends Activity implements SurfaceHolder.Callback { private Camera mCamera; private ImageView mButton; private SurfaceView mSurfaceView; private SurfaceHolder holder; private AutoFocusCallback mAutoFocusCallback = new AutoFocusCallback(); private ImageView sendImageIv; private String strCaptureFilePath = Environment.getExternalStorageDirectory()+"/DCIM/Camera/"; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); /* 隐藏状态栏 */ this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); /* 隐藏标题栏 */ requestWindowFeature(Window.FEATURE_NO_TITLE); /* 设定屏幕显示为横向 */ this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE); setContentView(R.layout.main); /* SurfaceHolder设置 */ mSurfaceView = (SurfaceView) findViewById(R.id.mSurfaceView); holder = mSurfaceView.getHolder(); holder.addCallback(EX07_16.this); holder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); /* 设置拍照Button的OnClick事件处理 */ mButton = (ImageView) findViewById(R.id.myButton); mButton.setOnClickListener(new OnClickListener() { @Override public void onClick(View arg0) { /* 告动对焦后拍照 */ mCamera.autoFocus(mAutoFocusCallback); } }); sendImageIv=(ImageView)findViewById(R.id.send_image); sendImageIv.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { Intent i = new Intent(); i.setType("image/*"); i.setAction(Intent.ACTION_GET_CONTENT); startActivityForResult(i, Activity.DEFAULT_KEYS_SHORTCUT); } }); } @Override public void surfaceCreated(SurfaceHolder surfaceholder) { try { /* 打开相机, */ mCamera = Camera.open(); mCamera.setPreviewDisplay(holder); } catch (IOException exception) { mCamera.release(); mCamera = null; } } @Override public void surfaceChanged(SurfaceHolder surfaceholder, int format, int w, int h) { /* 相机初始化 */ initCamera(); } @Override public void surfaceDestroyed(SurfaceHolder surfaceholder) { stopCamera(); mCamera.release(); mCamera = null; } /* 拍照的method */ private void takePicture() { if (mCamera != null) { mCamera.takePicture(shutterCallback, rawCallback, jpegCallback); } } private ShutterCallback shutterCallback = new ShutterCallback() { public void onShutter() { /* 按下快门瞬间会调用这里的程序 */ } }; private PictureCallback rawCallback = new PictureCallback() { public void onPictureTaken(byte[] _data, Camera _camera) { /* 要处理raw data?写?否 */ } }; private PictureCallback jpegCallback = new PictureCallback() { public void onPictureTaken(byte[] _data, Camera _camera) { if(Environment.getExternalStorageState(). equals(Environment.MEDIA_MOUNTED)) //判断SD卡是否存在,并且可以可以读写 { } else { Toast.makeText(EX07_16.this, "SD卡不存在或写保护", Toast.LENGTH_LONG).show(); } try { /* 取得相片 */ Bitmap bm = BitmapFactory.decodeByteArray(_data, 0, _data.length); /* 创建文件 */ File myCaptureFile = new File(strCaptureFilePath,"1.jpg"); BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(myCaptureFile)); /* 采用压缩转档方法 */ bm.compress(Bitmap.CompressFormat.JPEG, 100, bos); /* 调用flush()方法,更新BufferStream */ bos.flush(); /* 结束OutputStream */ bos.close(); /* 让相片显示3秒后圳重设相机 */ //Thread.sleep(2000); /* 重新设定Camera */ stopCamera(); initCamera(); } catch (Exception e) { e.printStackTrace(); } } }; /* 告定义class AutoFocusCallback */ public final class AutoFocusCallback implements android.hardware.Camera.AutoFocusCallback { public void onAutoFocus(boolean focused, Camera camera) { /* 对到焦点拍照 */ if (focused) { takePicture(); } } }; /* 相机初始化的method */ private void initCamera() { if (mCamera != null) { try { Camera.Parameters parameters = mCamera.getParameters(); /* * 设定相片大小为1024*768, 格式为JPG */ parameters.setPictureFormat(PixelFormat.JPEG); parameters.setPictureSize(1024, 768); mCamera.setParameters(parameters); /* 打开预览画面 */ mCamera.startPreview(); } catch (Exception e) { e.printStackTrace(); } } } /* 停止相机的method */ private void stopCamera() { if (mCamera != null) { try { /* 停止预览 */ mCamera.stopPreview(); } catch (Exception e) { e.printStackTrace(); } } } }

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout

xmlns:android="http://schemas.android.com/apk/res/android"

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

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