运用android内置相机拍照

使用android内置相机拍照
主程序：
public class AndroCamera extends Activity {
    private static final int IMAGE_CAPTURE = 0;
    private Button startBtn;
    private Uri imageUri;
    private ImageView imageView;

    /** Called when the activity is first created.
     *  sets the content and gets the references to
     *  the basic widgets on the screen like
     *  [email protected] Button} or [email protected] ImageView}
     */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        imageView = (ImageView)findViewById(R.id.img);
        startBtn = (Button) findViewById(R.id.startBtn);
        startBtn.setOnClickListener(new View.OnClickListener() {
            public void onClick(View v) {
                startCamera();
            }
        });
    }

    public void startCamera() {
        Log.d("ANDRO_CAMERA", "Starting camera on the phone...");
        String fileName = "testphoto.jpg";
        ContentValues values = new ContentValues();
        values.put(MediaStore.Images.Media.TITLE, fileName);
        values.put(MediaStore.Images.Media.DESCRIPTION,
                "Image capture by camera");
        values.put(MediaStore.Images.Media.MIME_TYPE, "image/jpeg");
        imageUri = getContentResolver().insert(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, values);
        Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
        intent.putExtra(MediaStore.EXTRA_OUTPUT, imageUri);
        intent.putExtra(MediaStore.EXTRA_VIDEO_QUALITY, 1);
        startActivityForResult(intent, IMAGE_CAPTURE);
    }

    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == IMAGE_CAPTURE) {
            if (resultCode == RESULT_OK){
                Log.d("ANDRO_CAMERA","Picture taken!!!");
                imageView.setImageURI(imageUri);
            }
        }
    }

页面文件：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
   android:orientation="vertical"
   android:layout_width="fill_parent"
   android:layout_height="fill_parent"
   >
<Button android:text="Start Camera"
    android:id="@+id/startBtn"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content">
</Button>
<ImageView android:id="@+id/img"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent">
</ImageView>
</LinearLayout