android实现定时拍照功能

在手机上面实现，设置一段时间（以秒计时）之后，自动拍照，适用于摄影师建立一个场景，之后设置时间，再进入场景。

界面主要就是一个设置时间的EditText和启动倒计时的Button，设置完时间之后，点击倒计时按钮。

在清单文件中加入权限：

主程序：

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); 
     
    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 colorEffects = parameters.getSupportedColorEffects(); 
      Iterator 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(); 
  } 
 
} 

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持考高分网。