android自动保存相机的属性与方向
camera方向的获取
int oldOrientation = -1;
mOrientationListener = new OrientationEventListener(Camera.this) { @Override
public void onOrientationChanged(int orientation) {
int oldOrientation = util.ruondOrientation(orientation,oldOrientation);
}
};
四个方向的确定
package com.example.cameraapp;
public class util{public int roundOrientation(int orientation, int oldOrientation){boolean changeOrientation = false;
if(oldOrientation == OrientationEventListener.ORIENTATION_UNKNOWN){changeOrientation = true;
} else {int dest = Math.abs(orientation-oldOrientation);
dest = Math.min(dest,360-dest);
changeOrientation = (dest>=45+ORIENTATION_HYSTERESIS);
}
if(changeOrientation ){return((orientation +45)/90*90)%360;
}
return oldOrientation;
}
}
package com.example.cameraapp;import java.io.IOException;import android.app.Activity;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.media.ExifInterface;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;public class CameraAppActivity extends Activity{ private static final int CAMERA_REQUEST = 1888; private ImageButton photoButton; private ImageView photoPic; private TextView Exif; Button updateDummyLoc; ExifInterface exifInterface;/** Called when the activity is first created. */@Overridepublic void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); photoButton = (ImageButton) this.findViewById(R.id.button1); photoPic = (ImageView) this.findViewById(R.id.photo1); Exif = (TextView)findViewById(R.id.exif); photoButton.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { //The method that is called when button is clicked, //as part of the OnClickListener interface. Intent cameraIntent = new Intent(android.provider.MediaStore.ACTION_IMAGE_CAPTURE); startActivityForResult(cameraIntent, CAMERA_REQUEST); updateDummyLoc = (Button)findViewById(R.id.update); updateDummyLoc.setOnClickListener(new Button.OnClickListener(){ public void onClick(View arg0) { // TODO Auto-generated method stub UpdateExit(); }}); }}); }protected void onActivityResult(int requestCode, int resultCode, String data) { if (requestCode == CAMERA_REQUEST) { // Bitmap photo = (Bitmap) data.getExtras().get("data"); Bitmap photo = BitmapFactory.decodeFile(data); photoPic.setImageBitmap(photo); Exif.setText(ReadExif(data)); } } void UpdateExit(){ String dummyLATITUDE = "0/1,16/1,5935883/125557"; String dummyLATITUDE_REF = "N"; String dummyLONGITUDE = "0/1,7/1,1429891026/483594097"; String dummyLONGITUDE_REF = "E"; exifInterface.setAttribute(ExifInterface.TAG_GPS_LATITUDE, dummyLATITUDE); exifInterface.setAttribute(ExifInterface.TAG_GPS_LATITUDE_REF, dummyLATITUDE_REF); exifInterface.setAttribute(ExifInterface.TAG_GPS_LONGITUDE, dummyLONGITUDE); exifInterface.setAttribute(ExifInterface.TAG_GPS_LONGITUDE_REF, dummyLONGITUDE_REF); try { exifInterface.saveAttributes(); Toast.makeText(CameraAppActivity.this, "saveAttribute finished", Toast.LENGTH_LONG).show(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); Toast.makeText(CameraAppActivity.this, e.toString(), Toast.LENGTH_LONG).show(); }}String ReadExif(String data){ String exif="Exif: " + data; try { exifInterface = new ExifInterface(data); exif += "\nIMAGE_LENGTH: " + exifInterface.getAttribute(ExifInterface.TAG_IMAGE_LENGTH); exif += "\nIMAGE_WIDTH: " + exifInterface.getAttribute(ExifInterface.TAG_IMAGE_WIDTH); exif += "\n DATETIME: " + exifInterface.getAttribute(ExifInterface.TAG_DATETIME); exif += "\n TAG_MAKE: " + exifInterface.getAttribute(ExifInterface.TAG_MAKE); exif += "\n TAG_MODEL: " + exifInterface.getAttribute(ExifInterface.TAG_MODEL); exif += "\n TAG_ORIENTATION: " + exifInterface.getAttribute(ExifInterface.TAG_ORIENTATION); exif += "\n TAG_WHITE_BALANCE: " + exifInterface.getAttribute(ExifInterface.TAG_WHITE_BALANCE); exif += "\n TAG_FOCAL_LENGTH: " + exifInterface.getAttribute(ExifInterface.TAG_FOCAL_LENGTH); exif += "\n TAG_FLASH: " + exifInterface.getAttribute(ExifInterface.TAG_FLASH); exif += "\nGPS related:"; float[] LatLong = new float[2]; if(exifInterface.getLatLong(LatLong)){ exif += "\n latitude= " + LatLong[0]; exif += "\n longitude= " + LatLong[1]; }else{ exif += "Exif tags are not available!"; } Toast.makeText(CameraAppActivity.this, "finished", Toast.LENGTH_LONG).show(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); Toast.makeText(CameraAppActivity.this, e.toString(), Toast.LENGTH_LONG).show(); } return exif; }}
