2013新春奉送：Android摄像头开发完美demo---(循环聚焦,缩放大小,旋转picture,查询支持的picturesize, ImageButton按键效果）

2013新春奉送：Android摄像头开发完美demo---(循环聚焦,缩放大小,旋转picture,查询支持的picturesize, ImageButton按键效果）

【后注：】下载代码的注意，我的手机是4.3寸的屏，华为U9200.如果不能运行的请修改参数。看本篇的第四条。Y的，省的说我传的代码不能用






除夕之夜，程序员还在编代码。/article/1652227.html这是我几个月前写的代码，现在看来真是垃圾不堪阿。变量名字不规范，整个架构拉杂，几乎没有注释，程序不稳键，没有安全退出，导致摄像头下次不可用。

这个代码几乎涉及到了摄像头开发的所有方面，（除了PreviewCallback，这块东西我会结合android摄像头自动识别人脸/火灾来谈)，且力求精简，是杂家的心血阿！相对之前改进之处有：

1,精简。只有一个ImageButton用来实现按下拍照。拍照后自动保存，进入预览界面。 不像原来的要三个按键：预览/拍照/保存。

2,聚焦方面实现不间断循环聚焦。 不像之前的，要按一下按键聚焦一次。

3,ImageButton增加了按下的效果。按之前示例如下：

，点击后背景变暗，有种风车旋转的感觉。

4,增加了查询摄像头PictureSizes和PreviewSize的代码，调试程序时应先查询出自己的参数然后配置。不同的手机参数不同。另外，预览surfaceView的高我设为800px，如果手机屏幕太小，这个参数要改。

5,改进了之前的按back返回按键退出程序后，再次进入程序camera没有释放，致使程序挂掉的问题。

6,改进了预览时手机横竖屏切换时，程序挂掉的毛病。但这里的布局还是采用默认的竖屏。

7,在实现循环聚焦的同时，保留了autoFocus（）接口。可以测试出，在使用FOCUS_MODE_CONTINUOUS_VIDEO聚焦模式下，autoFocus不发挥作用。

8,注释更加良好。

废话不说了请看源码：

第一部分：Manifinest.xml

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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="yan.guoqi.rectphoto"
android:versionCode="1"
android:versionName="1.0" >

<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="15" />
<!-- 增加文件存储和访问摄像头的权限 -->
<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.CAMERA" />
<uses-feature android:name="android.hardware.camera" />

<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:name=".RectPhoto"
android:label="@string/title_activity_rect_photo" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

</manifest>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="yan.guoqi.rectphoto"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="8"
        android:targetSdkVersion="15" />
    <!-- 增加文件存储和访问摄像头的权限 -->
    <uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
    <uses-permission android:name="android.permission.CAMERA" />
    <uses-feature android:name="android.hardware.camera" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".RectPhoto"
            android:label="@string/title_activity_rect_photo" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

第二部分：布局文件

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<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="@string/BestWish"
tools:context=".RectPhoto" />

<FrameLayout
android:layout_width="wrap_content"
android:layout_height="wrap_content" >

<SurfaceView
android:id="@+id/previewSV"
android:layout_width="fill_parent"
android:layout_height="800px" />
</FrameLayout>

<ImageButton
android:id="@+id/photoImgBtn"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@drawable/photo_img_btn"
android:layout_gravity="center" />

</LinearLayout>

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/BestWish"
        tools:context=".RectPhoto" />

    <FrameLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" >

        <SurfaceView
            android:id="@+id/previewSV"
            android:layout_width="fill_parent"
            android:layout_height="800px" />
    </FrameLayout>

    <ImageButton
        android:id="@+id/photoImgBtn"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:background="@drawable/photo_img_btn"
        android:layout_gravity="center" />

</LinearLayout>

第三部分：RectPhoto.java主程序

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package yan.guoqi.rectphoto;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Matrix;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;

public class RectPhoto extends Activity implements SurfaceHolder.Callback{
private static final String tag="yan";
private boolean isPreview = false;
private SurfaceView mPreviewSV = null; //预览SurfaceView

private SurfaceHolder mySurfaceHolder = null;
private ImageButton mPhotoImgBtn = null;
private Camera myCamera = null;
private Bitmap mBitmap = null;
private AutoFocusCallback myAutoFocusCallback = null;

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
//设置全屏无标题
requestWindowFeature(Window.FEATURE_NO_TITLE);
int flag = WindowManager.LayoutParams.FLAG_FULLSCREEN;
Window myWindow = this.getWindow();
myWindow.setFlags(flag, flag);

setContentView(R.layout.activity_rect_photo);

//初始化SurfaceView
mPreviewSV = (SurfaceView)findViewById(R.id.previewSV);
mySurfaceHolder = mPreviewSV.getHolder();
mySurfaceHolder.setFormat(PixelFormat.TRANSLUCENT);//translucent半透明 transparent透明

mySurfaceHolder.addCallback(this);
mySurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

//自动聚焦变量回调
myAutoFocusCallback = new AutoFocusCallback() {

public void onAutoFocus(boolean success, Camera camera) {
// TODO Auto-generated method stub

if(success)//success表示对焦成功

{
Log.i(tag, "myAutoFocusCallback: success...");
//myCamera.setOneShotPreviewCallback(null);


}
else
{
//未对焦成功
Log.i(tag, "myAutoFocusCallback: 失败了...");

}


}
};

mPhotoImgBtn = (ImageButton)findViewById(R.id.photoImgBtn);
//手动设置拍照ImageButton的大小为120×120,原图片大小是64×64

LayoutParams lp = mPhotoImgBtn.getLayoutParams();
lp.width = 120;
lp.height = 120;
mPhotoImgBtn.setLayoutParams(lp);
mPhotoImgBtn.setOnClickListener(new PhotoOnClickListener());
mPhotoImgBtn.setOnTouchListener(new MyOnTouchListener());


}


/*下面三个是SurfaceHolder.Callback创建的回调函数*/
public void surfaceChanged(SurfaceHolder holder, int format, int width,int height)
// 当SurfaceView/预览界面的格式和大小发生改变时，该方法被调用

{
// TODO Auto-generated method stub

Log.i(tag, "SurfaceHolder.Callback:surfaceChanged!");
initCamera();

}


public void surfaceCreated(SurfaceHolder holder)
// SurfaceView启动时/初次实例化，预览界面被创建时，该方法被调用。

{
// TODO Auto-generated method stub

myCamera = Camera.open();
try {
myCamera.setPreviewDisplay(mySurfaceHolder);
Log.i(tag, "SurfaceHolder.Callback: surfaceCreated!");
} catch (IOException e) {
// TODO Auto-generated catch block

if(null != myCamera){
myCamera.release();
myCamera = null;
}
e.printStackTrace();
}



}


public void surfaceDestroyed(SurfaceHolder holder)
//销毁时被调用
{
// TODO Auto-generated method stub

Log.i(tag, "SurfaceHolder.Callback：Surface Destroyed");
if(null != myCamera)
{
myCamera.setPreviewCallback(null); /*在启动PreviewCallback时这个必须在前不然退出出错。
这里实际上注释掉也没关系*/

myCamera.stopPreview();
isPreview = false;
myCamera.release();
myCamera = null;
}

}

//初始化相机
public void initCamera(){
if(isPreview){
myCamera.stopPreview();
}
if(null != myCamera){
Camera.Parameters myParam = myCamera.getParameters();
// //查询屏幕的宽和高

// WindowManager wm = (WindowManager)getSystemService(Context.WINDOW_SERVICE);

// Display display = wm.getDefaultDisplay();

// Log.i(tag, "屏幕宽度："+display.getWidth()+" 屏幕高度:"+display.getHeight());


myParam.setPictureFormat(PixelFormat.JPEG);//设置拍照后存储的图片格式


// //查询camera支持的picturesize和previewsize

// List<Size> pictureSizes = myParam.getSupportedPictureSizes();

// List<Size> previewSizes = myParam.getSupportedPreviewSizes();

// for(int i=0; i<pictureSizes.size(); i++){

// Size size = pictureSizes.get(i);

// Log.i(tag, "initCamera:摄像头支持的pictureSizes: width = "+size.width+"height = "+size.height);

// }

// for(int i=0; i<previewSizes.size(); i++){

// Size size = previewSizes.get(i);

// Log.i(tag, "initCamera:摄像头支持的previewSizes: width = "+size.width+"height = "+size.height);

//
// }


//设置大小和方向等参数

myParam.setPictureSize(1280, 960);
myParam.setPreviewSize(960, 720);
//myParam.set("rotation", 90);

myCamera.setDisplayOrientation(90);
myParam.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
myCamera.setParameters(myParam);
myCamera.startPreview();
myCamera.autoFocus(myAutoFocusCallback);
isPreview = true;
}
}

/*为了实现拍照的快门声音及拍照保存照片需要下面三个回调变量*/
ShutterCallback myShutterCallback = new ShutterCallback()
//快门按下的回调，在这里我们可以设置类似播放“咔嚓”声之类的操作。默认的就是咔嚓。

{

public void onShutter() {
// TODO Auto-generated method stub

Log.i(tag, "myShutterCallback:onShutter...");

}
};
PictureCallback myRawCallback = new PictureCallback()
// 拍摄的未压缩原数据的回调,可以为null
{

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

Log.i(tag, "myRawCallback:onPictureTaken...");

}
};
PictureCallback myJpegCallback = new PictureCallback()
//对jpeg图像数据的回调,最重要的一个回调
{

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

Log.i(tag, "myJpegCallback:onPictureTaken...");
if(null != data){
mBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);//data是字节数据，将其解析成位图

myCamera.stopPreview();
isPreview = false;
}
//设置FOCUS_MODE_CONTINUOUS_VIDEO)之后，myParam.set("rotation", 90)失效。图片竟然不能旋转了，故这里要旋转下

Matrix matrix = new Matrix();
matrix.postRotate((float)90.0);
Bitmap rotaBitmap = Bitmap.createBitmap(mBitmap, 0, 0, mBitmap.getWidth(), mBitmap.getHeight(), matrix, false);
//保存图片到sdcard

if(null != rotaBitmap)
{
saveJpeg(rotaBitmap);
}

//再次进入预览
myCamera.startPreview();
isPreview = true;
}
};
//拍照按键的监听
public class PhotoOnClickListener implements OnClickListener{

public void onClick(View v) {
// TODO Auto-generated method stub

if(isPreview && myCamera!=null){
myCamera.takePicture(myShutterCallback, null, myJpegCallback);
}

}

}
/*给定一个Bitmap，进行保存*/
public void saveJpeg(Bitmap bm){
String savePath = "/mnt/sdcard/rectPhoto/";
File folder = new File(savePath);
if(!folder.exists()) //如果文件夹不存在则创建

{
folder.mkdir();
}
long dataTake = System.currentTimeMillis();
String jpegName = savePath + dataTake +".jpg";
Log.i(tag, "saveJpeg:jpegName--" + jpegName);
//File jpegFile = new File(jpegName);

try {
FileOutputStream fout = new FileOutputStream(jpegName);
BufferedOutputStream bos = new BufferedOutputStream(fout);

// //如果需要改变大小(默认的是宽960×高1280),如改成宽600×高800

// Bitmap newBM = bm.createScaledBitmap(bm, 600, 800, false);


bm.compress(Bitmap.CompressFormat.JPEG, 100, bos);
bos.flush();
bos.close();
Log.i(tag, "saveJpeg：存储完毕！");
} catch (IOException e) {
// TODO Auto-generated catch block

Log.i(tag, "saveJpeg:存储失败！");
e.printStackTrace();
}
}

/*为了使图片按钮按下和弹起状态不同，采用过滤颜色的方法.按下的时候让图片颜色变淡*/
public class MyOnTouchListener implements OnTouchListener{

public final float[] BT_SELECTED=new float[]
{ 2, 0, 0, 0, 2,
0, 2, 0, 0, 2,
0, 0, 2, 0, 2,
0, 0, 0, 1, 0 };

public final float[] BT_NOT_SELECTED=new float[]
{ 1, 0, 0, 0, 0,
0, 1, 0, 0, 0,
0, 0, 1, 0, 0,
0, 0, 0, 1, 0 };
public boolean onTouch(View v, MotionEvent event) {
// TODO Auto-generated method stub

if(event.getAction() == MotionEvent.ACTION_DOWN){
v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_SELECTED));
v.setBackgroundDrawable(v.getBackground());
}
else if(event.getAction() == MotionEvent.ACTION_UP){
v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_NOT_SELECTED));
v.setBackgroundDrawable(v.getBackground());

}
return false;
}

}

@Override
public void onBackPressed()
//无意中按返回键时要释放内存
{
// TODO Auto-generated method stub

super.onBackPressed();
RectPhoto.this.finish();
}
}

package yan.guoqi.rectphoto;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import android.app.Activity;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.ColorMatrixColorFilter;
import android.graphics.Matrix;
import android.graphics.PixelFormat;
import android.hardware.Camera;
import android.hardware.Camera.AutoFocusCallback;
import android.hardware.Camera.PictureCallback;
import android.hardware.Camera.ShutterCallback;
import android.os.Bundle;
import android.util.Log;
import android.view.MotionEvent;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.View.OnTouchListener;
import android.view.ViewGroup.LayoutParams;
import android.view.Window;
import android.view.WindowManager;
import android.widget.ImageButton;

public class RectPhoto extends Activity implements SurfaceHolder.Callback{
	private static final String tag="yan";
	private boolean isPreview = false;
	private SurfaceView mPreviewSV = null; //预览SurfaceView
	private SurfaceHolder mySurfaceHolder = null;
	private ImageButton mPhotoImgBtn = null;
	private Camera myCamera = null;
	private Bitmap mBitmap = null;
	private AutoFocusCallback myAutoFocusCallback = null;

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		//设置全屏无标题
		requestWindowFeature(Window.FEATURE_NO_TITLE);
		int flag = WindowManager.LayoutParams.FLAG_FULLSCREEN;
		Window myWindow = this.getWindow();
		myWindow.setFlags(flag, flag);

		setContentView(R.layout.activity_rect_photo);

		//初始化SurfaceView
		mPreviewSV = (SurfaceView)findViewById(R.id.previewSV);
		mySurfaceHolder = mPreviewSV.getHolder();
		mySurfaceHolder.setFormat(PixelFormat.TRANSLUCENT);//translucent半透明 transparent透明
		mySurfaceHolder.addCallback(this);
		mySurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

		//自动聚焦变量回调
		myAutoFocusCallback = new AutoFocusCallback() {

			public void onAutoFocus(boolean success, Camera camera) {
				// TODO Auto-generated method stub
				if(success)//success表示对焦成功
				{
					Log.i(tag, "myAutoFocusCallback: success...");
					//myCamera.setOneShotPreviewCallback(null);

				}
				else
				{
					//未对焦成功
					Log.i(tag, "myAutoFocusCallback: 失败了...");

				}

			}
		};

		mPhotoImgBtn = (ImageButton)findViewById(R.id.photoImgBtn);
		//手动设置拍照ImageButton的大小为120×120,原图片大小是64×64
		LayoutParams lp = mPhotoImgBtn.getLayoutParams();
		lp.width = 120;
		lp.height = 120;		
		mPhotoImgBtn.setLayoutParams(lp);				
		mPhotoImgBtn.setOnClickListener(new PhotoOnClickListener());
		mPhotoImgBtn.setOnTouchListener(new MyOnTouchListener());

	}

	/*下面三个是SurfaceHolder.Callback创建的回调函数*/
	public void surfaceChanged(SurfaceHolder holder, int format, int width,int height) 
	// 当SurfaceView/预览界面的格式和大小发生改变时，该方法被调用
	{
		// TODO Auto-generated method stub		
		Log.i(tag, "SurfaceHolder.Callback:surfaceChanged!");
		initCamera();

	}

	public void surfaceCreated(SurfaceHolder holder) 
	// SurfaceView启动时/初次实例化，预览界面被创建时，该方法被调用。
	{
		// TODO Auto-generated method stub		
		myCamera = Camera.open();
		try {
			myCamera.setPreviewDisplay(mySurfaceHolder);
			Log.i(tag, "SurfaceHolder.Callback: surfaceCreated!");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			if(null != myCamera){
				myCamera.release();
				myCamera = null;
			}
			e.printStackTrace();
		}

	}

	public void surfaceDestroyed(SurfaceHolder holder) 
	//销毁时被调用
	{
		// TODO Auto-generated method stub
		Log.i(tag, "SurfaceHolder.Callback：Surface Destroyed");
		if(null != myCamera)
		{
			myCamera.setPreviewCallback(null); /*在启动PreviewCallback时这个必须在前不然退出出错。
			这里实际上注释掉也没关系*/
			
			myCamera.stopPreview(); 
			isPreview = false; 
			myCamera.release();
			myCamera = null;     
		}

	}

	//初始化相机
	public void initCamera(){
		if(isPreview){
			myCamera.stopPreview();
		}
		if(null != myCamera){			
			Camera.Parameters myParam = myCamera.getParameters();
			//			//查询屏幕的宽和高
			//			WindowManager wm = (WindowManager)getSystemService(Context.WINDOW_SERVICE);
			//			Display display = wm.getDefaultDisplay();
			//			Log.i(tag, "屏幕宽度："+display.getWidth()+" 屏幕高度:"+display.getHeight());

			myParam.setPictureFormat(PixelFormat.JPEG);//设置拍照后存储的图片格式

			//			//查询camera支持的picturesize和previewsize
			//			List<Size> pictureSizes = myParam.getSupportedPictureSizes();
			//			List<Size> previewSizes = myParam.getSupportedPreviewSizes();
			//			for(int i=0; i<pictureSizes.size(); i++){
			//				Size size = pictureSizes.get(i);
			//				Log.i(tag, "initCamera:摄像头支持的pictureSizes: width = "+size.width+"height = "+size.height);
			//			}
			//			for(int i=0; i<previewSizes.size(); i++){
			//				Size size = previewSizes.get(i);
			//				Log.i(tag, "initCamera:摄像头支持的previewSizes: width = "+size.width+"height = "+size.height);
			//
			//			}

			//设置大小和方向等参数
			myParam.setPictureSize(1280, 960);
			myParam.setPreviewSize(960, 720);			
			//myParam.set("rotation", 90);  			
			myCamera.setDisplayOrientation(90);  
			myParam.setFocusMode(Camera.Parameters.FOCUS_MODE_CONTINUOUS_VIDEO);
			myCamera.setParameters(myParam);			
			myCamera.startPreview();
			myCamera.autoFocus(myAutoFocusCallback);
			isPreview = true;
		}
	}

	/*为了实现拍照的快门声音及拍照保存照片需要下面三个回调变量*/
	ShutterCallback myShutterCallback = new ShutterCallback() 
	//快门按下的回调，在这里我们可以设置类似播放“咔嚓”声之类的操作。默认的就是咔嚓。
	{

		public void onShutter() {
			// TODO Auto-generated method stub
			Log.i(tag, "myShutterCallback:onShutter...");

		}
	};
	PictureCallback myRawCallback = new PictureCallback() 
	// 拍摄的未压缩原数据的回调,可以为null
	{

		public void onPictureTaken(byte[] data, Camera camera) {
			// TODO Auto-generated method stub
			Log.i(tag, "myRawCallback:onPictureTaken...");

		}
	};
	PictureCallback myJpegCallback = new PictureCallback() 
	//对jpeg图像数据的回调,最重要的一个回调
	{

		public void onPictureTaken(byte[] data, Camera camera) {
			// TODO Auto-generated method stub
			Log.i(tag, "myJpegCallback:onPictureTaken...");
			if(null != data){
				mBitmap = BitmapFactory.decodeByteArray(data, 0, data.length);//data是字节数据，将其解析成位图
				myCamera.stopPreview();
				isPreview = false;
			}
			//设置FOCUS_MODE_CONTINUOUS_VIDEO)之后，myParam.set("rotation", 90)失效。图片竟然不能旋转了，故这里要旋转下
			Matrix matrix = new Matrix();
			matrix.postRotate((float)90.0);
			Bitmap rotaBitmap = Bitmap.createBitmap(mBitmap, 0, 0, mBitmap.getWidth(), mBitmap.getHeight(), matrix, false);
			//保存图片到sdcard
			if(null != rotaBitmap)
			{
				saveJpeg(rotaBitmap);
			}

			//再次进入预览
			myCamera.startPreview();
			isPreview = true;
		}
	};
	//拍照按键的监听
	public class PhotoOnClickListener implements OnClickListener{

		public void onClick(View v) {
			// TODO Auto-generated method stub
			if(isPreview && myCamera!=null){
				myCamera.takePicture(myShutterCallback, null, myJpegCallback);	
			}

		}

	}
	/*给定一个Bitmap，进行保存*/
	public void saveJpeg(Bitmap bm){
		String savePath = "/mnt/sdcard/rectPhoto/";
		File folder = new File(savePath);
		if(!folder.exists()) //如果文件夹不存在则创建
		{
			folder.mkdir();
		}
		long dataTake = System.currentTimeMillis();
		String jpegName = savePath + dataTake +".jpg";
		Log.i(tag, "saveJpeg:jpegName--" + jpegName);
		//File jpegFile = new File(jpegName);
		try {
			FileOutputStream fout = new FileOutputStream(jpegName);
			BufferedOutputStream bos = new BufferedOutputStream(fout);

			//			//如果需要改变大小(默认的是宽960×高1280),如改成宽600×高800
			//			Bitmap newBM = bm.createScaledBitmap(bm, 600, 800, false);

			bm.compress(Bitmap.CompressFormat.JPEG, 100, bos);
			bos.flush();
			bos.close();
			Log.i(tag, "saveJpeg：存储完毕！");
		} catch (IOException e) {
			// TODO Auto-generated catch block
			Log.i(tag, "saveJpeg:存储失败！");
			e.printStackTrace();
		}
	}

	/*为了使图片按钮按下和弹起状态不同，采用过滤颜色的方法.按下的时候让图片颜色变淡*/
	public class MyOnTouchListener implements OnTouchListener{

		public final  float[] BT_SELECTED=new float[]
				{ 2, 0, 0, 0, 2,
			0, 2, 0, 0, 2,
			0, 0, 2, 0, 2,
			0, 0, 0, 1, 0 };			    

		public final float[] BT_NOT_SELECTED=new float[]
				{ 1, 0, 0, 0, 0,
			0, 1, 0, 0, 0,
			0, 0, 1, 0, 0,
			0, 0, 0, 1, 0 };
		public boolean onTouch(View v, MotionEvent event) {
			// TODO Auto-generated method stub
			if(event.getAction() == MotionEvent.ACTION_DOWN){
				v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_SELECTED));
				v.setBackgroundDrawable(v.getBackground());
			}
			else if(event.getAction() == MotionEvent.ACTION_UP){
				v.getBackground().setColorFilter(new ColorMatrixColorFilter(BT_NOT_SELECTED));
				v.setBackgroundDrawable(v.getBackground());
				
			}
			return false;
		}

	}
	
	@Override
	public void onBackPressed()
	//无意中按返回键时要释放内存
	{
		// TODO Auto-generated method stub
		super.onBackPressed();
		RectPhoto.this.finish();
	}
}

源码下载链接： http://download.csdn.net/detail/yanzi1225627/5060323



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注：代码不能正常运行的请看上面第4条，修改相关参数。

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