在android中，照相功能系统已经提供，在app中可以直接使用。当手机从android play里面下载有照相功能的应用时， 会判断手机是否支持。不支持，不给予下载。
照相有几个步骤：
1. 声明权限
2. 使用Camera照相
3. 显示图片
<uses-feature android:name="android.hardware.camera" />
private void dispatchTakePictureIntent(int actionCode) {
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(takePictureIntent, actionCode);
}
<PRE class=java name="code">@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
switch (requestCode) {
Bundle extras = intent.getExtras();
Bitmap mImageBitmap = (Bitmap) extras.get("data");
mImageView.setImageBitmap(mImageBitmap);
}</PRE>
<PRE></PRE>
<PRE></PRE>
Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
File f = null;
try {
f = setUpPhotoFile();
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(f));
} catch (IOException e) {
e.printStackTrace();
f = null;
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "IMG_"+ timeStamp + "_";
File albumF = getAlbumDir();
File imageF = File.createTempFile(imageFileName, "jpg", albumF);
return imageF;
}
private File setUpPhotoFile() throws IOException {
File f = createImageFile();
mCurrentPhotoPath = f.getAbsolutePath();
return f;
}
private File getAlbumDir() {
File storageDir = null;
if (Environment.MEDIA_MOUNTED.equals(Environment.getExternalStorageState())) {
storageDir = mAlbumStorageDirFactory.getAlbumStorageDir(getAlbumName());
if (storageDir != null) {
if (! storageDir.mkdirs()) {
if (! storageDir.exists()){
Log.d("CameraSample", "failed to create directory");
return null;
}
}
}
} else {
Log.v(getString(R.string.app_name), "External storage is not mounted READ/WRITE.");
}
return storageDir;
}
