package com.android;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.content.pm.ActivityInfo;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.Parameters;
import android.hardware.Camera.PictureCallback;
import android.media.MediaRecorder;
import android.os.Bundle;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.Window;
import android.widget.Button;
public class Camera_Capture extends Activity implements Button.OnClickListener , SurfaceHolder.Callback , Camera.ShutterCallback
{
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState)
{
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
//這行程式碼也可以隱藏Title Bar但是位置要放對
setContentView(R.layout.main);
this.setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_LANDSCAPE);
//強制讓螢幕的內容呈現橫向
SurfaceView SV = (SurfaceView) findViewById(R.id.SurfaceView);
surfaceHolder = SV.getHolder();
surfaceHolder.addCallback(this);
surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
captureButton = (Button) findViewById(R.id.captureButton);
captureButton.setOnClickListener(this);
TempFile = this.getFilesDir();
}
Button captureButton;
SurfaceHolder surfaceHolder;
Camera mCamera;
Parameters mParameters;
File TempFile;
Camera.PictureCallback TakeJpeg = new Camera.PictureCallback()
{
@Override
public void onPictureTaken(byte[] data, Camera camera)
{
// TODO Auto-generated method stub
try {
Bitmap mBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
File temp = File.createTempFile("PhotoTemp", ".jpg", TempFile);
//在模擬器中開一個暫存檔 路徑為 //data/data/YourPackageName/files/
//在DDMS視窗中可以看到
BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(temp));
mBitmap.compress(Bitmap.CompressFormat.JPEG, 80, bos);
//採用壓縮轉檔方法
//format 只有JPEG , PNG 兩種
//quality Hint to the compressor, 0-100. 0 meaning compress for small size, 100 meaning compress for max quality. Some formats, like PNG which is lossless, will ignore the quality setting
//stream The outputstream to write the compressed data.
bos.flush();
bos.close();
} catch (IOException e)
{
e.printStackTrace();
}
mCamera.startPreview();
//由於拍照完後 , PreView會停止
//故重新啟動PreView
}
};
Camera.PictureCallback TakeRAW = new Camera.PictureCallback()
{
@Override
public void onPictureTaken(byte[] data, Camera camera)
{
//raw: the callback for raw (uncompressed) image data, or null
Log.d("onTakeRAW",""+data);
}
};
Camera.PictureCallback PostView = new Camera.PictureCallback()
{
@Override
public void onPictureTaken(byte[] data, Camera camera)
{
//postview: callback with postview image data, may be null
Log.d("onPostView",""+data);
}
};
@Override
public void onShutter()
{
//Called as near as possible to the moment when a photo is captured from the sensor.
//This is a good opportunity to play a shutter sound or give other feedback of camera operation.
//This may be some time after the photo was triggered, but some time before the actual data is available.
Log.d("onShutter()","onShutter()");
}
@Override
public void onClick(View v)
{
switch(v.getId())
{
case R.id.captureButton:
mCamera.takePicture(this, TakeRAW, PostView ,TakeJpeg);
break;
}
}
@Override
public void surfaceCreated(SurfaceHolder holder)
{
mCamera = Camera.open();
try {
mParameters = mCamera.getParameters();
mParameters.setPictureFormat(PixelFormat.JPEG);
//mParameters.setPreviewSize(320, 480);
//設定螢幕Preview大小 , 對模擬器拍出的圖片沒影響
//mParameters.setPictureSize(320, 480);
//設定圖片解析度大小
mCamera.setParameters(mParameters);
mCamera.setPreviewDisplay(holder);
} catch (IOException exception)
{
mCamera.release();
mCamera = null;
}
mCamera.startPreview();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width,
int height)
{
// TODO Auto-generated method stub
}
@Override
public void surfaceDestroyed(SurfaceHolder holder)
{
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
}
