Java tutorial
/* Copyright 2015 Karthik Narumanchi Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License. ==============================================================================*/ package com.karthiknr.visionid; import android.app.ProgressDialog; import android.content.Intent; import android.graphics.Bitmap; import android.graphics.BitmapFactory; import android.net.Uri; import android.os.Bundle; import android.os.Environment; import android.provider.MediaStore; import android.support.design.widget.NavigationView; import android.support.v4.view.GravityCompat; import android.support.v4.widget.DrawerLayout; import android.support.v7.app.ActionBarDrawerToggle; import android.support.v7.app.AppCompatActivity; import android.support.v7.widget.Toolbar; import android.util.Log; import android.view.MenuItem; import android.view.View; import android.widget.ImageView; import android.widget.TextView; import android.widget.Toast; import java.io.File; import java.io.IOException; import java.util.List; public class MainActivity extends AppCompatActivity implements NavigationView.OnNavigationItemSelectedListener { public static final String PATH = Environment.getExternalStorageDirectory().toString() + "/VisionID/"; private static final String TAG = "MainActivity"; protected static TextView _field; protected static ImageView _image; protected String _path; protected static ProgressDialog progress; @Override protected void onCreate(Bundle savedInstanceState) { final File myDir = new File(PATH); if (!myDir.mkdirs()) { Log.v(TAG, "Make directory failed"); } super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); setSupportActionBar(toolbar); DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); drawer.setDrawerListener(toggle); toggle.syncState(); NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); navigationView.setNavigationItemSelectedListener(this); _field = (TextView) findViewById(R.id.field); _image = (ImageView) findViewById(R.id.imageView); progress = new ProgressDialog(this); progress.setTitle("Please Wait"); progress.setMessage("Processing Image and Recognizing"); progress.setCancelable(false); _path = PATH + "/img.jpg"; } @Override public void onBackPressed() { DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); if (drawer.isDrawerOpen(GravityCompat.START)) { drawer.closeDrawer(GravityCompat.START); } else { super.onBackPressed(); } } @SuppressWarnings("StatementWithEmptyBody") @Override public boolean onNavigationItemSelected(MenuItem item) { // Handle navigation view item clicks here. int id = item.getItemId(); if (id == R.id.nav_camera) { // Handle the camera action Log.v(TAG, "Starting Camera"); if (_image.getVisibility() == View.VISIBLE) { _image.setVisibility(View.INVISIBLE); } _field.setText(""); startCameraActivity(); } else if (id == R.id.nav_gallery) { Log.v(TAG, "Starting Image Chooser"); if (_image.getVisibility() == View.VISIBLE) { _image.setVisibility(View.INVISIBLE); } _field.setText(""); startGalleryActivity(); } else if (id == R.id.nav_info) { Toast.makeText(getApplicationContext(), "Karthik Narumanchi,2016", Toast.LENGTH_SHORT).show(); } else if (id == R.id.nav_gh) { Uri uri = Uri.parse("https://github.com/karthiknr/VisionID"); Intent intent = new Intent(Intent.ACTION_VIEW, uri); startActivity(intent); } DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); drawer.closeDrawer(GravityCompat.START); return true; } /* Methods follow */ protected void startGalleryActivity() { Intent intent = new Intent(); // Show only images, no videos or anything else intent.setType("image/*"); intent.setAction(Intent.ACTION_GET_CONTENT); // Always show the chooser (if there are multiple options available) startActivityForResult(Intent.createChooser(intent, "Select Picture"), 1); } protected void startCameraActivity() { File file = new File(_path); Uri outputFileUri = Uri.fromFile(file); final Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); intent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri); startActivityForResult(intent, 0); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { Log.i(TAG, "resultCode: " + resultCode); if (requestCode == 1)//Gallery Request Code { if (resultCode == RESULT_OK) { onPhotoChosen(data); } else { Log.v(TAG, "User cancelled"); } } else if (requestCode == 0)//Camera Request Code { if (resultCode == RESULT_OK) { onPhotoTaken(); } else { Log.v(TAG, "User cancelled"); } } } protected void onPhotoChosen(Intent data) { Uri uri = data.getData(); try { Bitmap bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri); progress.show(); new com.karthiknr.visionid.ProcessImageActivity(this).ProcessImage(bitmap, false);//Photo not captured } catch (IOException e) { e.printStackTrace(); } } protected void onPhotoTaken() { BitmapFactory.Options options = new BitmapFactory.Options(); options.inSampleSize = 2; //Increase for decrease in quality. 1 is for zero sampling,4 results in image res = 1/16 Bitmap bitmap = BitmapFactory.decodeFile(_path, options); progress.show(); new com.karthiknr.visionid.ProcessImageActivity(this).ProcessImage(bitmap, true);//Photo captured } public static void SetText(final List<Classifier.Recognition> results) { StringBuilder br = new StringBuilder(); if (results != null) { progress.dismiss(); if (_field.getText().toString().length() == 0) { for (final Classifier.Recognition recog : results) { br.append(recog.getTitle() + ": " + recog.getConfidence() * 100 + "\n"); } _field.setText(br.toString()); Log.v(TAG, "Text Set to Field"); } } else { progress.dismiss(); Log.v(TAG, "Text NOT Set to Field"); _field.setText("Unable to recognize"); } } public static void SetImage(Bitmap bmp) { if (_image.getVisibility() == View.INVISIBLE) { _image.setImageBitmap(bmp); _image.setVisibility(View.VISIBLE); } } }