Android图像采集之一：调用手机自带的照相机程序

</pre><strong>调用手机自带的照相机程序</strong><p></p><p><strong>（1）需要在Manifest.xml文件中，设置可读取SD卡的权限：</strong></p><p><pre name="code" class="html">    <!--添加SD卡可写权限  -->
<uses-permission android:name="android.permissio.WRITE_EXTERNAL_STORAGES"/>

//拍照照片存储位置
private File photoDir = new File(Environment.getExternalStorageDirectory()+"/DCIM/Camera");
private File photoFileName;
private String photoName;

//用来标识请求照相程序的Acitivity，作为RequestCode
private static final int requestCode_photoTaken = 1000;
<strong>	</strong>

<strong>（3）判断SD卡状态</strong>

String status = Environment.getExternalStorageState();
if (status.equals(Environment.MEDIA_MOUNTED)) {// 判断是否有SD卡
// 执行照相程序
} else
{
showToast("没有SD卡");
}

photoDir.mkdir();//创建照片存储目录

photoFileName = new File(photoDir,getphotoFileName());		//用日期给照片命名
Intent intent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE);
intent.putExtra(MediaStore.EXTRA_OUTPUT,Uri.fromFile(photoFileName) );		//将照相后的文件存储到所对应的目录下
startActivityForResult(intent,requestCode_photoTaken);

@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
// TODO Auto-generated method stub
super.onActivityResult(requestCode, resultCode, data);		//继承父类

//如果未成功返回
if(resultCode != RESULT_OK)
{
showToast("未成功返回数据！");
return;
}
else		//若成功响应，并返回数据
{
switch(requestCode)		//通过标识，找到对应的返回数据，并执行对应的程序
{
case requestCode_photoTaken:

// 执行相应处理程序
break;
}