Android调用摄像头

package cn.net.xuefei.myfacedetect;import java.io.IOException;import java.lang.reflect.Method;import android.app.Activity;import android.content.res.Configuration;import android.graphics.PixelFormat;import android.hardware.Camera;import android.hardware.Camera.AutoFocusCallback;import android.os.Build;import android.os.Bundle;import android.util.Log;import android.view.SurfaceHolder;import android.view.SurfaceView;public class MainActivity extends Activity implements SurfaceHolder.Callback {    private SurfaceView surfaceview;    private SurfaceHolder surfaceholder;    private Camera camera = null;    Camera.Parameters parameters;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        surfaceview = (SurfaceView) findViewById(R.id.surfaceview);        surfaceholder = surfaceview.getHolder();        surfaceholder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);        surfaceholder.addCallback(MainActivity.this);    }    @Override    public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {        // TODO Auto-generated method stub        camera.autoFocus(new AutoFocusCallback() {            @Override            public void onAutoFocus(boolean success, Camera camera) {                if (success) {                    initCamera();// 实现相机的参数初始化                    camera.cancelAutoFocus();// 只有加上了这一句，才会自动对焦。                }            }        });    }    @Override    public void surfaceCreated(SurfaceHolder holder) {        // TODO Auto-generated method stub        // 获取camera对象        camera = Camera.open();        try {            // 设置预览监听            camera.setPreviewDisplay(holder);            Camera.Parameters parameters = camera.getParameters();            if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {                parameters.set("orientation", "portrait");                camera.setDisplayOrientation(90);                parameters.setRotation(90);            } else {                parameters.set("orientation", "landscape");                camera.setDisplayOrientation(0);                parameters.setRotation(0);            }            camera.setParameters(parameters);            // 启动摄像头预览            camera.startPreview();            System.out.println("camera.startpreview");        } catch (IOException e) {            e.printStackTrace();            camera.release();            System.out.println("camera.release");        }    }    @Override    public void surfaceDestroyed(SurfaceHolder holder) {        // TODO Auto-generated method stub        if (camera != null) {            camera.stopPreview();            camera.release();        }    }    // 相机参数的初始化设置    private void initCamera() {        parameters = camera.getParameters();        parameters.setPictureFormat(PixelFormat.JPEG);        // parameters.setPictureSize(surfaceView.getWidth(),        // surfaceView.getHeight()); // 部分定制手机，无法正常识别该方法。        //parameters.setFlashMode(Parameters.FLASH_MODE_TORCH);        parameters.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_PICTURE);// 1连续对焦        setDispaly(parameters, camera);        camera.setParameters(parameters);        camera.startPreview();        camera.cancelAutoFocus();// 2如果要实现连续的自动对焦，这一句必须加上    }    // 控制图像的正确显示方向    private void setDispaly(Camera.Parameters parameters, Camera camera) {        if (Integer.parseInt(Build.VERSION.SDK) >= 8) {            setDisplayOrientation(camera, 90);        } else {            parameters.setRotation(90);        }    }    // 实现的图像的正确显示    private void setDisplayOrientation(Camera camera, int i) {        Method downPolymorphic;        try {            downPolymorphic = camera.getClass().getMethod("setDisplayOrientation", new Class[] { int.class });            if (downPolymorphic != null) {                downPolymorphic.invoke(camera, new Object[] { i });            }        } catch (Exception e) {            Log.e("Came_e", "图像出错");        }    }}

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context="${relativePackage}.${activityClass}" >    <SurfaceView        android:id="@+id/surfaceview"        android:layout_width="fill_parent"        android:layout_height="fill_parent" /></RelativeLayout>

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="cn.net.xuefei.myfacedetect"    android:versionCode="1"    android:versionName="1.0" >    <uses-sdk        android:minSdkVersion="14"        android:targetSdkVersion="14" />    <!-- 摄像头权限 -->    <uses-permission android:name="android.permission.CAMERA" />    <!-- SD卡读写权限 -->    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />    <application        android:allowBackup="true"        android:icon="@drawable/ic_launcher"        android:label="@string/app_name"        android:theme="@style/AppTheme" >        <activity            android:name=".MainActivity"            android:label="@string/app_name" >            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>

参考文章
http://blog.sina.com.cn/s/blog_5a48dd2d0100tmcn.html

http://www.cnblogs.com/over140/archive/2011/11/16/2251344.html

http://blog.csdn.net/lin772662623/article/details/8578548

http://blog.csdn.net/geekstart/article/details/13630009

http://www.cnblogs.com/linlf03/p/3682385.html

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