Implementation of the Android mobile phone photo function

Implementation of the Android mobile phone photo function

1. layout file main. xml

Ii. MainActivity. java

Import java. io. file; import java. io. fileOutputStream; import android. app. activity; import android. hardware. camera; import android. hardware. camera. pictureCallback; import android. OS. bundle; import android. OS. environment; import android. view. motionEvent; import android. view. surfaceHolder; import android. view. surfaceHolder. callback; import android. view. surfaceView; import android. view. view; import android. view. vi EwGroup; import android. view. window; import android. view. windowManager; public class MainActivity extends Activity {private View layout; private Camera camera; @ Override public void onCreate (Bundle savedInstanceState) {super. onCreate (savedInstanceState); requestWindowFeature (Window. FEATURE_NO_TITLE); getWindow (). setFlags (WindowManager. layoutParams. FLAG_FULLSCREEN, WindowManager. layoutParams. FLAG_FU LLSCREEN); setContentView (R. layout. main); layout = this. findViewById (R. id. buttonlayout); SurfaceView surfaceView = (SurfaceView) this. findViewById (R. id. surfaceView); surfaceView. getHolder (). setType (SurfaceHolder. SURFACE_TYPE_PUSH_BUFFERS); surfaceView. getHolder (). setFixedSize (176,144); surfaceView. getHolder (). setKeepScreenOn (true); surfaceView. getHolder (). addCallback (new SurfaceCallback ();} p Ublic void takepicture (View v) {if (camera! = Null) {switch (v. getId () {case R. id. takepicture: camera. takePicture (null, null, new MyPictureCallback (); break; case R. id. autofocus: camera. autoFocus (null); break ;}} private final class MyPictureCallback implements PictureCallback {public void onPictureTaken (byte [] data, Camera camera) {try {File jpgFile = new File (Environment. getExternalStorageDirectory (), System. currentTimeMillis () +. Jpg); FileOutputStream outStream = new FileOutputStream (jpgFile); outStream. write (data); outStream. close (); camera. startPreview ();} catch (Exception e) {e. printStackTrace () ;}} private final class SurfaceCallback implements Callback {public void surfaceCreated (SurfaceHolder holder) {try {camera = Camera. open (); // open the Camera. parameters parameters = camera. getParameters (); // Log. I (Main Activity, parameters. flatten (); parameters. setPreviewSize (800,480); parameters. setPreviewFrameRate (5); parameters. setPictureSize (1024,768); parameters. setJpegQuality (80); camera. setParameters (parameters); camera. setPreviewDisplay (holder); camera. startPreview (); // start preview} catch (Exception e) {e. printStackTrace () ;}} public void surfaceChanged (SurfaceHolder holder, int format, int width, int hei Ght) {} public void surfaceDestroyed (SurfaceHolder holder) {if (camera! = Null) {camera. release (); camera = null ;}}@ Override public boolean onTouchEvent (MotionEvent event) {if (event. getAction () = MotionEvent. ACTION_DOWN) {layout. setVisibility (ViewGroup. VISIBLE); return true;} return super. onTouchEvent (event );}}

3. Add Permissions

The effect is as follows: