Android中的相机应用程序

Question

我一直在寻找相机应用程序的一些代码，并得到一个，但是当我完成代码时，它给了我一些错误。对任何一个代码进行编码，请纠正代码中的错误。

我的应用程序的代码如下

package abc.bae.camer; 

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

import android.app.Activity; 
import android.graphics.Camera; 
import android.hardware.Camera.PictureCallback; 
import android.hardware.Camera.ShutterCallback; 
import android.os.Bundle; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.widget.Button; 
import android.widget.FrameLayout; 

public class Bharath_cameraActivity extends Activity { 
    private static final String TAG = "Bharath_cameraActivity"; 
    public Camera camera; 
    public Preview preview; 
    public Button buttonClick; 
    public FrameLayout fl; 

    @Override 
    public void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.main); 
     preview = new Preview(this); 
     fl =(FrameLayout)findViewById(R.id.preview).addView(preview); 
     buttonClick = (Button) findViewById(R.id.click); 
     buttonClick.setOnClickListener(new OnClickListener() { 
     public void onClick(View v) { 
       preview.camera.takePicture(null,null, null); 
      } 
     }); 
    } 

    ShutterCallback shutterCallback = new ShutterCallback() { 
     public void onShutter() { 
     } 
    }; 
    PictureCallback rawCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, android.hardware.Camera camera) { 
      // TODO Auto-generated method stub 
     } 
    }; 
    PictureCallback jpegCallback = new PictureCallback() { 
     public void onPictureTaken(byte[] data, Camera camera) { 
      FileOutputStream outStream = null; 
      try { 
       outStream = new FileOutputStream(String.format(
         "/sdcard/%d.jpg", System.currentTimeMillis())); 
       outStream.write(data); 
       outStream.close(); 
      } catch (FileNotFoundException e) { 
       e.printStackTrace(); 
      } catch (IOException e) { 
       e.printStackTrace(); 
      } 
     } 

     public void onPictureTaken(byte[] data, android.hardware.Camera camera) { 
      // TODO Auto-generated method stub 
     } 
    }; 
} 

代码为Preview.java是

package abc.bae.camer; 

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

import android.content.Context; 
import android.graphics.Camera; 
import android.graphics.Canvas; 
import android.graphics.Color; 
import android.graphics.Paint; 
import android.hardware.Camera.PreviewCallback; 
import android.view.SurfaceHolder; 

class Preview extends Bharath_cameraActivity implements SurfaceHolder.Callback { 
    private static final String TAG = "Preview"; 
    SurfaceHolder mHolder; 
    public Camera camera; 

    Preview(Context context) { 
     mHolder = getHolder(); 
     mHolder.addCallback(this); 
     mHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); 
    } 

    public void surfaceCreated(SurfaceHolder holder) { 
     camera = Camera.open(); 
     try { 
      camera.setPreviewDisplay(holder); 
      camera.setPreviewCallback(new PreviewCallback() { 
       public void onPreviewFrame(byte[] data, Camera arg1) { 
        FileOutputStream outStream = null; 
        try { 
         outStream = new FileOutputStream(String.format(
           "/sdcard/%d.jpg", System.currentTimeMillis())); 
         outStream.write(data); 
         outStream.close(); 
        } catch (FileNotFoundException e) { 
         e.printStackTrace(); 
        } catch (IOException e) { 
         e.printStackTrace(); 
        } 
        Preview.this.invalidate(); 
       } 
      }); 
     } catch (IOException e) { 
      e.printStackTrace(); 
     } 
    } 

    public void surfaceDestroyed(SurfaceHolder holder) { 
     camera.stopPreview(); 
     camera = null; 
    } 

    public void surfaceChanged(SurfaceHolder holder, int format, int w, int h) { 
     Camera.Parameters parameters = camera.getParameters(); 
     parameters.setPreviewSize(w, h); 
     camera.setParameters(parameters); 
     camera.startPreview(); 
    } 

    @Override 
    public void draw(Canvas canvas) { 
     super.draw(canvas); 
     Paint p = new Paint(Color.RED); 
     canvas.drawText("PREVIEW", canvas.getWidth()/2, 
       canvas.getHeight()/2, p); 
    } 
} 

Answer 1

这里是我的简单拍照代码希望这有助于

private static final int TAKE_PHOTO_CODE = 1; 

    public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState);  
     takePhoto(); 
    } 

...

private void takePhoto(){ 
    Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);  
    intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getTempFile()));  
    startActivityForResult(intent,TAKE_PHOTO_CODE); 
} 

..

protected void onActivityResult(int requestCode, int resultCode, Intent data) {  
    if(requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK){ 

     // do stub like crop, rename , rotate pictue 
    } 
    else finish();   
} 

..

private File getTempFile(){ 
    File root = new File(Environment.getExternalStorageDirectory(),"picture"); 
    if(!root.exists()){ 
    root.mkdirs(); 
    } 
    File file = new File(root,"picture.jpg"); 
    return file; 
} 

Answer 2

我有一些代码，它可以帮助你：

Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); 
startActivityForResult(cameraIntent, 1888); 

，你也必须重写onActivityResult()方法来完成过程

protected void onActivityResult(int requestCode, int resultCode, Intent data) { 
    if (resultCode == Activity.RESULT_OK) { 
     super.onActivityResult(requestCode, resultCode, data); 
     if (requestCode == 1888){ 
      if (resultCode == Activity.RESULT_OK) { 
       bitmap = (Bitmap) data.getExtras().get("data"); 
       //show the bitmapImage 
      } 
     } 
    } 
}