大家好，这是一个简单的拍照功能，很简单的界面，一个显示图像区域SurfaceView一个“拍照”按钮。直接上代码！

1、CameraDemoActivity.java(主界面)

package org.winplus.camera;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.Date;

import android.app.Activity;

import android.content.pm.ActivityInfo;

import android.graphics.PixelFormat;

import android.hardware.Camera;

import android.os.AsyncTask;

import android.os.Bundle;

import android.os.Environment;

import android.text.format.DateFormat;

import android.util.Log;

import android.view.KeyEvent;

import android.view.SurfaceHolder;

import android.view.SurfaceView;

import android.view.View;

import android.view.Window;

import android.view.View.OnClickListener;

import android.widget.Button;

public class CameraDemoActivity extends Activity{

private final static String TAG = "CameraActivity";

private SurfaceView surfaceView;

private SurfaceHolder surfaceHolder;

private Camera camera;

private File picture;

private Button btnSave;

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_PORTRAIT);

this.requestWindowFeature(Window.FEATURE_NO_TITLE);

setContentView(R.layout.main);

setupViews();

}

private void setupViews(){

surfaceView = (SurfaceView) findViewById(R.id.camera_preview); // Camera interface to instantiate components

surfaceHolder = surfaceView.getHolder(); // Camera interface to instantiate components

surfaceHolder.addCallback(surfaceCallback); // Add a callback for the SurfaceHolder

surfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

btnSave = (Button) findViewById(R.id.save_pic);

btnSave.setOnClickListener(new OnClickListener() {

@Override

public void onClick(View v) {

takePic();

}

});

}

@Override

public boolean onKeyDown(int keyCode, KeyEvent event) {

if (keyCode == KeyEvent.KEYCODE_CAMERA

|| keyCode == KeyEvent.KEYCODE_SEARCH) {

takePic();

return true;

}

return super.onKeyDown(keyCode, event);

}

private void takePic() {

camera.stopPreview();// stop the preview

camera.takePicture(null, null, pictureCallback); // picture

}

// Photo call back

Camera.PictureCallback pictureCallback = new Camera.PictureCallback() {

//@Override

public void onPictureTaken(byte[] data, Camera camera) {

new SavePictureTask().execute(data);

camera.startPreview();

}

};

// save pic

class SavePictureTask extends AsyncTask {

@Override

protected String doInBackground(byte[]... params) {

String fname = DateFormat.format("yyyyMMddhhmmss", new Date()).toString()+".jpg";

Log.i(TAG, "fname="+fname+";dir="+Environment.getExternalStorageDirectory());

//picture = new File(Environment.getExternalStorageDirectory(),fname);// create file

picture = new File(Environment.getExternalStorageDirectory()+"/"+fname);

try {

FileOutputStream fos = new FileOutputStream(picture.getPath()); // Get file output stream

fos.write(params[0]); // Written to the file

fos.close();

} catch (Exception e) {

e.printStackTrace();

}

return null;

}

}

// SurfaceHodler Callback handle to open the camera, off camera and photo size changes

SurfaceHolder.Callback surfaceCallback = new SurfaceHolder.Callback() {

public void surfaceCreated(SurfaceHolder holder) {

Log.i(TAG, "surfaceCallback====");

camera = Camera.open(); // Turn on the camera

try {

camera.setPreviewDisplay(holder); // Set Preview

} catch (IOException e) {

camera.release();// release camera

camera = null;

}

}

public void surfaceChanged(SurfaceHolder holder, int format, int width,

int height) {

Log.i(TAG,"====surfaceChanged");

Camera.Parameters parameters = camera.getParameters(); // Camera parameters to obtain

parameters.setPictureFormat(PixelFormat.JPEG);// Setting Picture Format

// parameters.set("rotation", 180); // Arbitrary rotation

camera.setDisplayOrientation(0);

// parameters.setPreviewSize(400, 300); // Set Photo Size

camera.setParameters(parameters); // Setting camera parameters

camera.startPreview(); // Start Preview

}

public void surfaceDestroyed(SurfaceHolder holder) {

Log.i(TAG,"====surfaceDestroyed");

camera.stopPreview();// stop preview

camera.release(); // Release camera resources

camera = null;

}

};

}

2、main.xml(布局文件)

android:layout_width="fill_parent"

android:layout_height="fill_parent"

android:orientation="vertical" >

android:id="@+id/camera_preview"

android:layout_width="800dip"

android:layout_height="600dip"

android:layout_alignParentTop="true"

android:layout_centerInParent="true"

android:layout_gravity="center_vertical|center_horizontal" />

android:id="@+id/save_pic"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/txt_save" />

3、别忘了添加权限：

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脚本之家。