android实现定时拍照功能

<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android"   android:id="@+id/frameLayout"   android:layout_width="fill_parent"   android:layout_height="fill_parent" >    <SurfaceView     android:id="@+id/imageView"     android:layout_width="fill_parent"     android:layout_height="fill_parent" />    <LinearLayout     android:id="@+id/lineLayout"     android:layout_width="fill_parent"     android:layout_height="fill_parent"     android:orientation="vertical" >      <Button       android:id="@+id/startBtn"       android:layout_width="wrap_content"       android:layout_height="wrap_content"       android:text="@string/startTimer"        android:layout_gravity="center_horizontal"/>      <!--     <TextView --> <!--       android:id="@+id/countDowntextView" --> <!--       android:layout_width="fill_parent" --> <!--       android:layout_height="fill_parent" --> <!--       android:layout_gravity="center_horizontal|center_vertical|center" --> <!--       android:gravity="center_horizontal|center_vertical" --> <!--       android:text="@string/conutTime" --> <!--       android:textSize="40sp" /> -->          <EditText       android:id="@+id/countDownEditTextView"       android:layout_width="fill_parent"       android:layout_height="fill_parent"       android:layout_gravity="center_horizontal|center_vertical|center"       android:gravity="center_horizontal|center_vertical"       android:text="@string/conutTime"       android:textSize="80sp"        android:inputType="number"/>         </LinearLayout>  </FrameLayout> 

<uses-permission android:name="android.permission.CAMERA" /> <!--下面的可不需要--> <uses-feature android:name="android.hardware.camera" /> <uses-feature android:name="android.hardware.camera.autofocus" /> 

package cn.yh.cameradelaycontroll;  import java.io.OutputStream; import java.util.Iterator; import java.util.List;  import android.app.Activity; import android.content.ContentValues; import android.content.res.Configuration; import android.hardware.Camera; import android.hardware.Camera.PictureCallback; import android.net.Uri; import android.os.Bundle; import android.os.Handler; import android.provider.MediaStore.Images.Media; import android.text.Editable; import android.text.TextWatcher; import android.util.Log; import android.view.Menu; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.TextView; import android.widget.Toast;  public class MainActivity extends Activity implements SurfaceHolder.Callback,     OnClickListener, PictureCallback {    private static final String CAMERA_CONTROLL = "CAMERA_CONTROLL";   private SurfaceView imageSView;   private Button startButton;   // private TextView countDownTextView;   private EditText countDownEditTextView;   private Camera camera;   private SurfaceHolder surfaceHolder;   private Handler timerUpdateHandler;   private boolean timerRunning = false;   private int currentTimer = 10;    @Override   protected void onCreate(Bundle savedInstanceState) {     super.onCreate(savedInstanceState);     setContentView(R.layout.activity_main);     imageSView = (SurfaceView) findViewById(R.id.imageView);     startButton = (Button) findViewById(R.id.startBtn);     // countDownTextView = (TextView) findViewById(R.id.countDowntextView);     countDownEditTextView = (EditText) findViewById(R.id.countDownEditTextView);     /*     countDownEditTextView.addTextChangedListener(new TextWatcher() {        @Override       public void onTextChanged(CharSequence s, int start, int before,           int count) {         // TODO Auto-generated method stub       }        @Override       public void beforeTextChanged(CharSequence arg0, int arg1,           int arg2, int arg3) {         // TODO Auto-generated method stub        }        @Override       public void afterTextChanged(Editable arg0) {         // TODO Auto-generated method stub         currentTimer = Integer.parseInt(countDownEditTextView.getText().toString());       }     });     */     surfaceHolder = imageSView.getHolder();      surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);      surfaceHolder.addCallback(this);      startButton.setOnClickListener(this);      timerUpdateHandler = new Handler();   }    @Override   public boolean onCreateOptionsMenu(Menu menu) {     // Inflate the menu; this adds items to the action bar if it is present.     getMenuInflater().inflate(R.menu.main, menu);     return true;   }    @Override   public void onPictureTaken(byte[] data, Camera camera) {     // TODO Auto-generated method stub     Uri imageFileUri = getContentResolver().insert(         Media.EXTERNAL_CONTENT_URI, new ContentValues());     try {       OutputStream imageFileOS = getContentResolver().openOutputStream(           imageFileUri);       imageFileOS.write(data);       imageFileOS.flush();       imageFileOS.close();     } catch (Exception e) {       // TODO Auto-generated catch block       Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG).show();     }     camera.startPreview();   }    @Override   public void onClick(View v) {     // TODO Auto-generated method stub     currentTimer = Integer.parseInt(countDownEditTextView.getText().toString());     switch (v.getId()) {     case R.id.startBtn:       if (!timerRunning) {         timerRunning = true;         timerUpdateHandler.post(timerUpdateTask);       }       break;     }   }    private Runnable timerUpdateTask = new Runnable() {      @Override     public void run() {       // TODO Auto-generated method stub       if (currentTimer > 1) {         currentTimer--;         timerUpdateHandler.postDelayed(timerUpdateTask, 1000);       } else {         camera.takePicture(null, null, null, MainActivity.this);         timerRunning = false;         currentTimer = 10;       }       countDownEditTextView.setText(currentTimer + "");     }   };    @Override   public void surfaceChanged(SurfaceHolder holder, int format, int width,       int height) {     // TODO Auto-generated method stub     camera.startPreview();   }    @Override   public void surfaceCreated(SurfaceHolder holder) {     // TODO Auto-generated method stub     int cameraNums = Camera.getNumberOfCameras();     Log.e(CAMERA_CONTROLL, cameraNums + "");     try {       camera = Camera.open(cameraNums - 1);     } catch (Exception e) {       Log.e(CAMERA_CONTROLL, e.getMessage());     }     try {       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);       }       List<String> colorEffects = parameters.getSupportedColorEffects();       Iterator<String> cei = colorEffects.iterator();       while (cei.hasNext()) {         String currentEffect = cei.next();         if (currentEffect.equals(Camera.Parameters.EFFECT_SOLARIZE)) {           parameters               .setColorEffect(Camera.Parameters.EFFECT_SOLARIZE);           break;         }       }       camera.setParameters(parameters);     } catch (Exception e) {       // TODO Auto-generated catch block       // e.printStackTrace();       camera.release();     }   }    @Override   public void surfaceDestroyed(SurfaceHolder holder) {     // TODO Auto-generated method stub     camera.stopPreview();     camera.release();   }  }