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dragosholbandragosholban
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Get Image from Camera
1 parent 36848d5 commit 064f2ca

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7 files changed

+203
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lines changed

‎.idea/caches/build_file_checksums.ser‎

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‎app/src/main/AndroidManifest.xml‎

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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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package="com.dragosholban.androidfacedetection">
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<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
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<application
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android:allowBackup="true"
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android:icon="@mipmap/ic_launcher"
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<category android:name="android.intent.category.LAUNCHER" />
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</intent-filter>
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</activity>
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<provider
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android:name="android.support.v4.content.FileProvider"
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android:authorities="${applicationId}.fileprovider"
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android:exported="false"
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android:grantUriPermissions="true">
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<meta-data
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android:name="android.support.FILE_PROVIDER_PATHS"
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android:resource="@xml/file_paths" />
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</provider>
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<activity android:name=".FaceDetectionActivity"></activity>
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</application>
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</manifest>

‎app/src/main/java/com/dragosholban/androidfacedetection/FaceDetectionActivity.java‎

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package com.dragosholban.androidfacedetection;
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import android.content.Intent;
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import android.graphics.Bitmap;
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import android.graphics.BitmapFactory;
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import android.graphics.Matrix;
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import android.media.ExifInterface;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.widget.ImageView;
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import android.widget.Toast;
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import java.io.IOException;
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public class FaceDetectionActivity extends AppCompatActivity {
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_face_detection);
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Intent intent = getIntent();
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final ImageView imageView = findViewById(R.id.imageView);
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final String mCurrentPhotoPath = intent.getStringExtra("mCurrentPhotoPath");
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// run image related code after the view was laid out
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// to have all dimensions calculated
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imageView.post(new Runnable() {
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@Override
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public void run() {
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if (mCurrentPhotoPath != null) {
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Bitmap bitmap = getBitmapFromPathForImageView(mCurrentPhotoPath, imageView);
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imageView.setImageBitmap(bitmap);
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}
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}
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});
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}
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private Bitmap getBitmapFromPathForImageView(String mCurrentPhotoPath, ImageView imageView) {
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// Get the dimensions of the View
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int targetW = imageView.getWidth();
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int targetH = imageView.getHeight();
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// Get the dimensions of the bitmap
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BitmapFactory.Options bmOptions = new BitmapFactory.Options();
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bmOptions.inJustDecodeBounds = true;
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BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
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int photoW = bmOptions.outWidth;
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int photoH = bmOptions.outHeight;
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// Determine how much to scale down the image
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int scaleFactor = Math.min(photoW/targetW, photoH/targetH);
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// Decode the image file into a Bitmap sized to fill the View
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bmOptions.inJustDecodeBounds = false;
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bmOptions.inSampleSize = scaleFactor;
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bmOptions.inPurgeable = true;
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Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
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Bitmap rotatedBitmap = bitmap;
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// rotate bitmap if needed
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try {
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ExifInterface ei = new ExifInterface(mCurrentPhotoPath);
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int orientation = ei.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_UNDEFINED);
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switch (orientation) {
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case ExifInterface.ORIENTATION_ROTATE_90:
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rotatedBitmap = rotateImage(bitmap, 90);
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break;
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case ExifInterface.ORIENTATION_ROTATE_180:
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rotatedBitmap = rotateImage(bitmap, 180);
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break;
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case ExifInterface.ORIENTATION_ROTATE_270:
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rotatedBitmap = rotateImage(bitmap, 270);
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break;
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}
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} catch (IOException e) {
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Toast.makeText(this, e.getMessage(), Toast.LENGTH_SHORT).show();
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}
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return rotatedBitmap;
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}
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public static Bitmap rotateImage(Bitmap source, float angle) {
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Matrix matrix = new Matrix();
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matrix.postRotate(angle);
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return Bitmap.createBitmap(source, 0, 0, source.getWidth(), source.getHeight(), matrix, true);
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}
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}

‎app/src/main/java/com/dragosholban/androidfacedetection/MainActivity.java‎

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package com.dragosholban.androidfacedetection;
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import android.Manifest;
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import android.content.Intent;
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import android.content.pm.PackageManager;
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import android.net.Uri;
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import android.os.Environment;
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import android.provider.MediaStore;
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import android.support.v4.app.ActivityCompat;
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import android.support.v4.content.ContextCompat;
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import android.support.v4.content.FileProvider;
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import android.support.v7.app.AppCompatActivity;
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import android.os.Bundle;
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import android.view.View;
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import android.widget.Toast;
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import java.io.File;
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import java.io.IOException;
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import java.text.SimpleDateFormat;
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import java.util.Date;
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public class MainActivity extends AppCompatActivity {
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String mCurrentPhotoPath;
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private static final int REQUEST_IMAGE_CAPTURE = 1;
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private static final int REQUEST_PERMISSION_WRITE_EXTERNAL_STORAGE = 2;
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@Override
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protected void onCreate(Bundle savedInstanceState) {
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super.onCreate(savedInstanceState);
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setContentView(R.layout.activity_main);
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}
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public void onImageFromCameraClick(View view) {
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Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
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if (intent.resolveActivity(getPackageManager()) != null) {
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File photoFile = null;
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try {
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photoFile = createImageFile();
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} catch (IOException e) {
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Toast.makeText(this, e.getMessage(), Toast.LENGTH_LONG);
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}
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if (photoFile != null) {
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Uri photoUri = FileProvider.getUriForFile(this, getApplicationContext().getPackageName() + ".fileprovider", photoFile);
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intent.putExtra(MediaStore.EXTRA_OUTPUT, photoUri);
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startActivityForResult(intent, REQUEST_IMAGE_CAPTURE);
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}
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}
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}
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private File createImageFile() throws IOException {
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if (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
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// permission not granted, initiate request
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ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_PERMISSION_WRITE_EXTERNAL_STORAGE);
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} else {
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// Create an image file name
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String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
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String imageFileName = "JPEG_" + timeStamp + "_";
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File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
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File image = File.createTempFile(
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imageFileName, /* prefix */
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".jpg", /* suffix */
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storageDir /* directory */
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);
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mCurrentPhotoPath = image.getAbsolutePath(); // save this to use in the intent
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return image;
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}
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return null;
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}
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@Override
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protected void onActivityResult(int requestCode, int resultCode, Intent data) {
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if (requestCode == REQUEST_IMAGE_CAPTURE && resultCode == RESULT_OK) {
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Intent intent = new Intent(this, FaceDetectionActivity.class);
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intent.putExtra("mCurrentPhotoPath", mCurrentPhotoPath);
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startActivity(intent);
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}
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}
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}

‎app/src/main/res/layout/activity_face_detection.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
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xmlns:app="http://schemas.android.com/apk/res-auto"
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xmlns:tools="http://schemas.android.com/tools"
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android:layout_width="match_parent"
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android:layout_height="match_parent"
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tools:context=".FaceDetectionActivity">
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<ImageView
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android:id="@+id/imageView"
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android:layout_width="0dp"
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android:layout_height="0dp"
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android:layout_marginBottom="8dp"
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android:layout_marginRight="8dp"
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android:layout_marginLeft="8dp"
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android:layout_marginTop="8dp"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintEnd_toEndOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintTop_toTopOf="parent" />
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</android.support.constraint.ConstraintLayout>

‎app/src/main/res/layout/activity_main.xml‎

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android:layout_height="match_parent"
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tools:context=".MainActivity">
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<TextView
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<Button
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android:id="@+id/button"
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android:layout_width="wrap_content"
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android:layout_height="wrap_content"
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android:text="Hello World!"
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android:onClick="onImageFromCameraClick"
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android:text="Get Image from Camera"
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app:layout_constraintBottom_toBottomOf="parent"
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app:layout_constraintLeft_toLeftOf="parent"
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app:layout_constraintRight_toRightOf="parent"

‎app/src/main/res/xml/file_paths.xml‎

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<?xml version="1.0" encoding="utf-8"?>
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<paths xmlns:android="http://schemas.android.com/apk/res/android">
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<external-path name="my_images" path="." />
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</paths>

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