第一步：在功能清单文件AndroidManifest.xml中添加音频刻录和照相机权限：

<uses-permission android:name="android.permission.RECORD_AUDIO"/>

 <uses-permission android:name="android.permission.CAMERA"/>

<uses-permission android:name="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"/>

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

第二步：编写音频刻录代码:

recorder.reset();

recorder.setVideoSource(MediaRecorder.VideoSource.CAMERA); //从照相机采集视频

recorder.setAudioSource(MediaRecorder.AudioSource.MIC);

recorder.setOutputFormat(MediaRecorder.OutputFormat.THREE_GPP);

recorder.setVideoSize(320, 240);

recorder.setVideoFrameRate(3); //每秒3帧

recorder.setVideoEncoder(MediaRecorder.VideoEncoder.H263); //设置视频编码方式

recorder.setAudioEncoder(MediaRecorder.AudioEncoder.AMR_NB);

recorder.setOutputFile("/mnt/sdcard/itcast.3gp");

recorder.setPreviewDisplay(surfaceView.getHolder().getSurface());

recorder.prepare();//预期准备

recorder.start();//开始刻录

...

recorder.stop();//停止刻录

recorder.release(); //刻录完成一定要释放资源

posted @ 2011-06-08 00:30 飞鹰小谭 阅读(68) 评论(0)

在main.xml布局文件添加用于显示取景画面的SurfaceView 控件：

<SurfaceView android:layout_width="fill_parent" android:layout_height="240dip" android:id="@+id/surfaceView" />

SurfaceView surfaceView = (SurfaceView)this.findViewById(R.id.surfaceView);

surfaceView.getHolder().setFixedSize(176, 144);  //设置分辨率

/*下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前*/

surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

Camera camera = Camera.open();

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

Display display = wm.getDefaultDisplay();

Camera.Parameters parameters = camera.getParameters();

parameters.setPreviewSize(display.getWidth(), display.getHeight());//设置预览照片的大小

parameters.setPreviewFrameRate(3);//每秒3帧

parameters.setPictureFormat(PixelFormat.JPEG);//设置照片的输出格式

parameters.set("jpeg-quality", 85);//照片质量

parameters.setPictureSize(display.getWidth(), display.getHeight());//设置照片的大小

camera.setParameters(parameters);

camera.setPreviewDisplay(surfaceView.getHolder());//通过SurfaceView显示取景画面

camera.startPreview();//开始预览

camera.autoFocus(null);//自动对焦

camera.takePicture(null, null, null, jpegCallback);//拍照片

camera.stopPreview();//停止预览

camera.release();//释放摄像头

<?

xml version="1.0" encoding="utf-8"

?>

<

manifest

xmlns:android

="http://schemas.android.com/apk/res/android"

package

="com.takepic"

android:versionCode

="1"

android:versionName

="1.0"

>

<

uses-sdk

android:minSdkVersion

="7"

/>

<

application

android:icon

="@drawable/icon"

android:label

="@string/app_name"

>

<!--

手机屏幕横向显示

-->

<

activity

android:name

=".TakePicActivity"

android:label

="@string/app_name"

android:screenOrientation

="landscape"

>

<

intent-filter

>

<

action

android:name

="android.intent.action.MAIN"

/>

<

category

android:name

="android.intent.category.LAUNCHER"

/>

</

intent-filter

>

</

activity

>

</

application

>

<!--

增加摄像头的访问权限

-->

<

uses-permission

android:name

="android.permission.CAMERA"

/>

<!--

在SDCard中创建与删除文件权限

-->

<

uses-permission

android:name

="android.permission.MOUNT_UNMOUNT_FILESYSTEMS"

/>

<!--

往SDCard写入数据权限

-->

<

uses-permission

android:name

="android.permission.WRITE_EXTERNAL_STORAGE"

/>

</

manifest

>

package

com.takepic;

import

java.io.File;

import

java.io.FileOutputStream;

import

java.io.IOException;

import

android.app.Activity;

import

android.content.Context;

import

android.graphics.Bitmap;

import

android.graphics.BitmapFactory;

import

android.graphics.PixelFormat;

import

android.graphics.Bitmap.CompressFormat;

import

android.hardware.Camera;

import

android.hardware.Camera.PictureCallback;

import

android.os.Bundle;

import

android.os.Environment;

import

android.util.Log;

import

android.view.Display;

import

android.view.KeyEvent;

import

android.view.SurfaceHolder;

import

android.view.SurfaceView;

import

android.view.Window;

import

android.view.WindowManager;

import

android.view.SurfaceHolder.Callback;

public

class

TakePicActivity

extends

Activity {

private

final

static

String TAG

=

"

TakePicActivity

"

;

private

SurfaceView surfaceView;

private

Camera camera;

private

boolean

preview

=

false

;

/**

Called when the activity is first created.

*/

@Override

public

void

onCreate(Bundle savedInstanceState) {

super

.onCreate(savedInstanceState);

Window window

=

getWindow();

requestWindowFeature(Window.FEATURE_NO_TITLE);

//

没有标题

window.setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);

//

设置全屏

window.addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);

//

高亮

setContentView(R.layout.main);

surfaceView

=

(SurfaceView)

this

.findViewById(R.id.surfaceview);

/*

下面设置Surface不维护自己的缓冲区，而是等待屏幕的渲染引擎将内容推送到用户面前

*/

surfaceView.getHolder().setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);

surfaceView.getHolder().setFixedSize(

176

,

144

);

//

设置分辨率

}

@Override

public

boolean

onKeyDown(

int

keyCode, KeyEvent event) {

if

(camera

!=

null

&&

event.getRepeatCount()

==

0

){

//

按单次

switch

(keyCode) {

case

KeyEvent.KEYCODE_SEARCH:

camera.autoFocus(

null

);

//

自动对焦

break

;

case

KeyEvent.KEYCODE_CAMERA:

//

拍照键

case

KeyEvent.KEYCODE_DPAD_CENTER:

//

确认键

camera.takePicture(

null

,

null

,

new

TackPicCallBack());

break

;

default

:

break

;

}

}

return

true

;

}

private

final

class

TackPicCallBack

implements

PictureCallback{

@Override

public

void

onPictureTaken(

byte

[] data, Camera camera) {

FileOutputStream stream

=

null

;

try

{

Bitmap bitmap

=

BitmapFactory.decodeByteArray(data,

0

, data.length);

File file

=

new

File(Environment.getExternalStorageDirectory(),System.currentTimeMillis()

+

"

.jpg

"

);

stream

=

new

FileOutputStream(file);

bitmap.compress(CompressFormat.JPEG,

100

, stream);

//

处理完照片继续预览

camera.stopPreview();

camera.startPreview();

}

catch

(Exception e) {

Log.i(TAG, e.getMessage());

}

finally

{

if

(stream

!=

null

){

try

{

stream.close();

}

catch

(IOException e) {

//

TODO Auto-generated catch block

e.printStackTrace();

}

}

}

}

}

private

final

class

SurfaceViewCallBack

implements

Callback{

@Override

public

void

surfaceChanged(SurfaceHolder holder,

int

format,

int

width,

int

height) {

//

TODO Auto-generated method stub

}

@Override

public

void

surfaceCreated(SurfaceHolder holder) {

try

{

camera

=

Camera.open();

Camera.Parameters parameters

=

camera.getParameters();

WindowManager wm

=

(WindowManager) getSystemService(Context.WINDOW_SERVICE);

Display display

=

wm.getDefaultDisplay();

parameters.setPreviewSize(display.getWidth(), display.getHeight());

//

设置预览照片的大小

parameters.setPreviewFrameRate(

3

);

//

每秒3帧

parameters.setPictureFormat(PixelFormat.JPEG);

//

设置照片的输出格式

parameters.set(

"

jpeg-quality

"

,

85

);

//

照片质量 最高质量可以设置为100

parameters.setPictureSize(display.getWidth(), display.getHeight());

//

设置照片的大小 如果要拍的大就设置大一些

camera.setParameters(parameters);

camera.setPreviewDisplay(surfaceView.getHolder());

//

通过SurfaceView显示取景画面

camera.startPreview();

//

开始预览

preview

=

true

;

}

catch

(Exception e) {

Log.i(TAG, e.getMessage());

}

//

preview = true;

}

@Override

public

void

surfaceDestroyed(SurfaceHolder holder) {

if

(camera

!=

null

){

if

(preview){

camera.stopPreview();

//

停止预览

}

camera.release();

}

}

}

}