我使用stackoverflow和google.I需要计算我的相机和指定对象之间的距离.
为此,我需要找到我的相机的焦距.我也创建了示例项目,但它创建了Null Pointer Exception.请帮助..
代码如下.
public class MainActivity extends Activity {
Camera mcamera;
int focul_length;
Parameters params;
File mFile;
public int PICTURE_ACTIVITY_CODE = 1;
public String FILENAME = "sdcard/photo.jpg";
Camera.Parameters cameraParameters;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
launchTakePhoto();
}
private void launchTakePhoto()
{
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraParameters = mcamera.getParameters();
CameraInfo myinfo = new CameraInfo();
float l=cameraParameters.getFocalLength(); // Here its creating Null Pointer Exception
mFile = new File(FILENAME);
System.out.println("My Focul Length:--"+l);
Uri outputFileUri = Uri.fromFile(mFile);
intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri);
startActivityForResult(intent, PICTURE_ACTIVITY_CODE);
}
Also If possible please provide the code to get angle of Elevation.If possible.I need this very badly.I need your help guys!!
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data)
{
if (requestCode == PICTURE_ACTIVITY_CODE)
{
if (resultCode == RESULT_OK)
{
ImageView myimageView = (ImageView) findViewById(R.id.imageView1);
Uri inputFileUri = Uri.fromFile(mFile);
myimageView.setImageURI(inputFileUri);
}
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.main, menu);
return true;
}
}
