019_04简易相机

package com.example.day19_04simplecamera;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    public void takephoto(View v){
        Intent intent = new Intent();
        intent.setClass(this, TakePhoto.class);
        startActivity(intent);
        
    }
    
    public void takevideo(View v){
        Intent intent = new Intent();
        intent.setClass(this, TakeVideo.class);
        startActivity(intent);
    }
}

package com.example.day19_04simplecamera;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.Bitmap.CompressFormat;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceHolder.Callback;
import android.view.SurfaceView;
import android.view.View;
import android.widget.Toast;

public class TakePhoto extends Activity{
    private Camera camera;
   @Override
    protected void onCreate(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
       super.onCreate(savedInstanceState);
       setContentView(R.layout.takephoto);
       
       SurfaceView surfaceView = (SurfaceView) findViewById(R.id.sf_photo);
       SurfaceHolder holder = surfaceView.getHolder();
       
       holder.addCallback(new Callback() {
        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            System.out.println("TakePhoto.onCreate(...).new Callback() {...}.surfaceCreated()");
            camera = Camera.open();
               try {
                camera.setPreviewDisplay(holder);
                camera.startPreview();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        
        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width,
                int height) {
            // TODO Auto-generated method stub            
        }
        
        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            // TODO Auto-generated method stub
            System.out
                    .println("TakePhoto.onCreate(...).new Callback() {...}.surfaceDestroyed()");
            camera.stopPreview();
            camera.release();
        }
        
       });
       
    } 

   
    public void takephoto(View V){      
        camera.autoFocus( new AutoFocusCallback() {        
            @Override
            public void onAutoFocus(boolean success, Camera camera) {
                // TODO Auto-generated method stub
                //对焦完成之后，就应该拍照
                Parameters parameters = camera.getParameters();
                 takephotobycamera();        
            }
        });
    }
    
    
    private void takephotobycamera(){
        camera.takePicture(null, null, new PictureCallback() {        
            @Override
            public void onPictureTaken(byte[] data, Camera camera) {
                // TODO Auto-generated method stub            
                Bitmap  bitmap= BitmapFactory.decodeByteArray(data, 0, data.length);
                FileOutputStream fos ;
                try {
                    fos = new FileOutputStream(new File("storage/sdcard1/photo1.jpeg"));
                    boolean success=bitmap.compress(CompressFormat.JPEG, 100, fos);
                    if(success)
                        Toast.makeText(TakePhoto.this, "保存成功", 1).show();
                    else {
                        Toast.makeText(TakePhoto.this, "保存失败", 1).show();
                    }
                } catch (FileNotFoundException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }

                 ////系统相机拍完照之后，会自动停止预览 ,启动预览
                 camera.startPreview();
                
            }
        });
    }
}

package com.example.day19_04simplecamera;

import java.io.IOException;

import android.app.Activity;
import android.hardware.Camera;
import android.media.AudioManager;
import android.media.CamcorderProfile;
import android.media.MediaRecorder;
import android.media.MediaRecorder.AudioSource;
import android.media.MediaRecorder.VideoSource;
import android.os.Bundle;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.SurfaceHolder.Callback;

public class TakeVideo extends Activity {
    private Camera camera;
    private SurfaceHolder holder;
    private MediaRecorder mediaRecorder;

     @Override
    protected void onCreate(Bundle savedInstanceState) {
        // TODO Auto-generated method stub
        super.onCreate(savedInstanceState);
        setContentView(R.layout.takevideo);
        
       SurfaceView surfaceView = (SurfaceView) findViewById(R.id.sf_photo);
       holder = surfaceView.getHolder();
       
       holder.addCallback(new Callback() {

        @Override
        public void surfaceCreated(SurfaceHolder holder) {
            System.out
                    .println("TakePhoto.onCreate(...).new Callback() {...}.surfaceCreated()");
            camera = Camera.open();
               try {
                camera.setPreviewDisplay(holder);
                camera.startPreview();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        
        @Override
        public void surfaceChanged(SurfaceHolder holder, int format, int width,
                int height) {
            // TODO Auto-generated method stub            
        }
        
        @Override
        public void surfaceDestroyed(SurfaceHolder holder) {
            // TODO Auto-generated method stub
            System.out
                    .println("TakePhoto.onCreate(...).new Callback() {...}.surfaceDestroyed()");
            camera.stopPreview();
            camera.release();
        }
        
       });
        
    }
     
     
     public void start(View v){
         
         //停止preview
         camera.stopPreview();
         //解锁camera
         camera.unlock();
         
         mediaRecorder = new MediaRecorder();
         //关联摄像头
         mediaRecorder.setCamera(camera);
         //设置音频源和视频源
         mediaRecorder.setAudioSource( AudioSource.CAMCORDER);
         mediaRecorder.setVideoSource(VideoSource.CAMERA);

         //设置录视频的配置参数         
         CamcorderProfile profile  = CamcorderProfile.get(CamcorderProfile.QUALITY_LOW);
         mediaRecorder.setProfile(profile);
         
         //设置输出到哪里
         mediaRecorder.setOutputFile("storage/sdcard1/video.mp4");
         mediaRecorder.setPreviewDisplay(holder.getSurface());
         
         //开始录制视频
         try {
            mediaRecorder.prepare();
         } catch (IllegalStateException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
         }
         mediaRecorder.start();
         
     }
     
     public void stop(View v){
         
         if (mediaRecorder!=null) {
             mediaRecorder.stop();
             mediaRecorder.release();
        }
         //注：此时画面中已经没有预览了，需要重新锁定摄像头，开启预览才会有画面！
        // 14. 锁定摄像头
         camera.lock();
         // 15. 再打开摄像头的预览
         camera.startPreview();

        
         
     }
}

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.day19_04simplecamera"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="14"
        android:targetSdkVersion="21" />
    <uses-permission android:name="android.permission.CAMERA"/>
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
    <uses-permission android:name="android.permission.RECORD_AUDIO"/>

    <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>
        <activity android:name=".TakePhoto"
            android:screenOrientation="landscape"></activity>
        <activity android:name=".TakeVideo"
            android:screenOrientation="landscape"></activity>
    </application>

</manifest>