实例教程十三：拍照

 

不错的帖子：

仿UCWEB界面源码！
http://www.eoeandroid.com/thread-225509-1-1.html

Android MP3经典案例
http://www.eoeandroid.com/thread-212478-1-1.html

根据奇异高清UI界面源码 添加了一些功能
http://www.eoeandroid.com/thread-212872-1-1.html

Android 3D立体图片旋转
http://www.eoeandroid.com/thread-212512-1-1.html

------------帖子正文-----------------

原文链接：http://www.eoeandroid.com/thread-205293-1-1.html

拍照界面--main.xml

<?xml version="1.0" encoding="utf-8"?>
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
 
    <!-- 父界面 -->
 
    <SurfaceView
        android:id="@+id/sfvShow"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent" />
 
    <!-- 子界面 -->
 
    <RelativeLayout
        android:id="@+id/btnLayout"
        android:layout_width="fill_parent"
        android:layout_height="fill_parent"
        android:visibility="gone" >
 
        <Button
            android:id="@+id/btnTakePicture"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentBottom="true"
            android:layout_alignParentRight="true"
            android:layout_marginRight="5dp"
            android:onClick="takepicture"
            android:text="@string/takepicture" />
 
        <Button
            android:id="@+id/btnAutoFocus"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignTop="@id/btnTakePicture"
            android:layout_marginRight="20dp"
            android:layout_toLeftOf="@id/btnTakePicture"
            android:onClick="takepicture"
            android:text="@string/autoFocus" />
    </RelativeLayout>
 
</FrameLayout>

拍照代码：MainActivity.java

package cn.itcast.picture;
 
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
 
import android.app.Activity;
import android.hardware.Camera;
import android.hardware.Camera.PictureCallback;
import android.os.Bundle;
import android.os.Environment;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.RelativeLayout;
 
public class MainActivity extends Activity {
        private RelativeLayout btnLayout;
        private SurfaceView sfvShow;
        private Camera camera;
 
        @Override
        public void onCreate(Bundle savedInstanceState) {
                super.onCreate(savedInstanceState);
 
                requestWindowFeature(Window.FEATURE_NO_TITLE); //设置窗口无标题
                getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                                WindowManager.LayoutParams.FLAG_FULLSCREEN); //设置全屏
                setContentView(R.layout.main);
 
                initView();
 
 
        }   
 
        private void initView() {
                btnLayout = (RelativeLayout)this.findViewById(R.id.btnLayout);
                //得到SurfaceView显示控件 ,只有得到它，才能捕获摄像头画面
                sfvShow = (SurfaceView)this.findViewById(R.id.sfvShow);
 
                sfvShow.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
                sfvShow.getHolder().setFixedSize(176, 144);
                sfvShow.getHolder().setKeepScreenOn(true); //使摄像头一直保持高亮
                sfvShow.getHolder().addCallback(new SurfaceCallback());
        }
 
        private final class SurfaceCallback implements Callback{
 
                @Override
                public void surfaceChanged(SurfaceHolder holder, int format, int width,
                                int height) {
                        // TODO Auto-generated method stub
 
                }
 
                @Override
                public void surfaceCreated(SurfaceHolder holder) {
                        try{
                                //打开摄像头
                                camera = Camera.open();
                                Camera.Parameters parameters = camera.getParameters();
                                parameters.setPreviewSize(640, 480);
                                parameters.setPreviewFrameRate(5);
                                parameters.setPictureSize(640, 480);
                                parameters.setJpegQuality(80);
                                camera.setParameters(parameters);
                                camera.setPreviewDisplay(holder);
                                 
 
                                //Log.i("摄像头参数", parameters.flatten());
                        }catch(Exception e){
                                e.printStackTrace();
                        }
 
                }
 
                @Override
                public void surfaceDestroyed(SurfaceHolder holder) {
                        //一定要关闭摄像头，因为摄像头只能被一个使用
                        if(camera != null){
                                camera.release();
                                camera = null;
                        }
 
                }
 
        }
 
        //拍照
        public void takepicture(View v){
                if(camera != null){
                        switch (v.getId()) {
                        case R.id.btnTakePicture:
                                camera.takePicture(null, null, new MyPictureCallBack());
                                break;
                        case R.id.btnAutoFocus:
                                //不想得到对焦后的事件，传NULL
                                camera.autoFocus(null);
                                break;
                        default:
                                break;
                        }
                }
        }
 
        //经过压缩处理后的图片数据
        private final class MyPictureCallBack implements PictureCallback{
                @Override
                public void onPictureTaken(byte[] data, Camera camera) {
                        try{
                                File jpgFile = new File(Environment.getExternalStorageDirectory(),
                                                System.currentTimeMillis() + ".jpg");
                                //输出 流
                                FileOutputStream outStream = new FileOutputStream(jpgFile);
                                outStream.write(data);
                                outStream.close();
                                //代表摄像头处理完照片了
                                camera.startPreview(); //开始预览
                        }catch (FileNotFoundException e) {
                                e.printStackTrace();
                        }catch(IOException e){
                                e.printStackTrace();
                        }
                }                
        }
 
        @Override
        public boolean onTouchEvent(MotionEvent event) {
                if(event.getAction() == MotionEvent.ACTION_DOWN){
                        btnLayout.setVisibility(ViewGroup.VISIBLE);
                        return true; //返回true，销毁该事件，不要再往后传递了
                }
                return super.onTouchEvent(event);
        }
}

清单文件：

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="cn.itcast.picture"
    android:versionCode="1"
    android:versionName="1.0" >
 
    <uses-sdk android:minSdkVersion="8" />
 
    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="landscape" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
 
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
 
    <uses-permission android:name="android.permission.CAMERA" />
    <!-- 在SDCard中创建与删除文件权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <!-- 在SDCard中写入数据权限 -->
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
 
</manifest>

源码下载：takepicture.rar