<SurfaceView    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/sv_main_surface"    />  <Button    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:onClick="tackPhoto"    android:text="拍照"    />

public class MainActivity extends AppCompatActivity {  private SurfaceView sv_main_surface;  private Camera camera;  @Override  public void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);    sv_main_surface = (SurfaceView) findViewById(R.id.sv_main_surface);    //添加surface回調函數    sv_main_surface.getHolder().addCallback(new SurfaceHolder.Callback() {      @Override//控件創建時，打開照相機      public void surfaceCreated(SurfaceHolder holder) {        //打開照相機        camera = Camera.open();        //設置參數        Camera.Parameters parameters=camera.getParameters();        parameters.setPictureFormat(PixelFormat.JPEG);        parameters.set("jpeg-quality",85);        camera.setParameters(parameters);        //將畫面展示到SurfaceView        try {          camera.setPreviewDisplay(sv_main_surface.getHolder());        } catch (IOException e) {          e.printStackTrace();        }        //開啟預覽效果        camera.startPreview();      }      @Override//控件改變      public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {      }      @Override//控件銷毀      public void surfaceDestroyed(SurfaceHolder holder) {        //照相同一時刻只能允許一個軟件打開        if(camera!=null){          camera.stopPreview();          camera.release();//釋放內存          camera=null;        }      }    });  }  public void takePhoto(View view){    camera.takePicture(null, null, new Camera.PictureCallback() {      @Override      public void onPictureTaken(byte[] bytes, Camera camera) {        //技術：圖片壓縮技術（如果圖片不壓縮，圖片大小會過大，會報一個oom內存溢出的錯誤）        Bitmap bitmap= BitmapFactory.decodeByteArray(bytes,0,bytes.length);        try {          FileOutputStream fos = new FileOutputStream("/mnt/sdcard/qq"+System.currentTimeMillis()+".png");//圖片保存路徑          bitmap.compress(Bitmap.CompressFormat.PNG,85,fos);//壓縮格式，質量，壓縮路徑          camera.stopPreview();          camera.startPreview();        } catch (FileNotFoundException e) {          e.printStackTrace();        }      }    });  }}

   <!--打開照相機的權限-->  <uses-permission android:name="android.permission.CAMERA"></uses-permission>  <!--創建文件的權限-->  <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"></uses-permission>  <!--寫內存卡的權限-->  <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"></uses-permission>

<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  xmlns:tools="http://schemas.android.com/tools"  android:id="@+id/activity_media_recorder"  android:layout_width="match_parent"  android:layout_height="match_parent"  android:paddingBottom="@dimen/activity_vertical_margin"  android:paddingLeft="@dimen/activity_horizontal_margin"  android:paddingRight="@dimen/activity_horizontal_margin"  android:paddingTop="@dimen/activity_vertical_margin"  tools:context="com.zking.familyapp.MediaRecorderActivity">  <SurfaceView    android:layout_width="match_parent"    android:layout_height="match_parent"    android:id="@+id/sv_media_surface"    />  <LinearLayout    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:orientation="vertical"    ></LinearLayout>  <Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="開始"    android:onClick="start"    /> <Button    android:layout_width="wrap_content"    android:layout_height="wrap_content"    android:text="停止"    android:onClick="stop"    /></RelativeLayout>

public class MediaRecorderActivity extends AppCompatActivity {  private SurfaceView sv_media_surface;  private MediaRecorder mediaRecorder;  @Override  protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_media_recorder);    sv_media_surface = (SurfaceView) findViewById(R.id.sv_media_surface);    //實例化媒體錄制器    mediaRecorder = new MediaRecorder();  }  public void start(View view){    mediaRecorder.setVideoSource(MediaRecorder.VideoSource.CAMERA);    mediaRecorder.setAudioSource(MediaRecorder.AudioSource.MIC);    //設置格式    mediaRecorder.setOutputFormat(MediaRecorder.OutputFormat.MPEG_4);    mediaRecorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263);    mediaRecorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);    //設置保存路徑    mediaRecorder.setOutputFile("/mnt/sdcard/uu"+System.currentTimeMillis()+".mp4");    mediaRecorder.setPreviewDisplay(sv_media_surface.getHolder().getSurface());    try {      mediaRecorder.prepare();      mediaRecorder.start();    } catch (IOException e) {      e.printStackTrace();    }  }  public void stop(View view){    if(mediaRecorder!=null){      mediaRecorder.stop();      mediaRecorder.release();      mediaRecorder=null;    }  }}

<!-- 錄像的權限-->  <uses-permission android:name="android.permission.RECORD_AUDIO"></uses-permission>