效果图：
人脸识别成表情需要playservice服务支持
grandle：
dependencies { implementation fileTree(include: [‘*.jar‘], dir: ‘libs‘) implementation ‘com.android.support:appcompat-v7:28.0.0‘ implementation ‘com.android.support:support-v4:28.0.0‘ implementation ‘com.android.support.constraint:constraint-layout:1.1.3‘ testImplementation ‘junit:junit:4.12‘ androidTestImplementation ‘com.android.support.test:runner:1.0.2‘ androidTestImplementation ‘com.android.support.test.espresso:espresso-core:3.0.2‘ implementation ‘com.android.support:design:28.0.0‘ implementation ‘com.google.android.gms:play-services-vision:10.2.0‘ implementation ‘com.jakewharton:butterknife:8.8.1‘ annotationProcessor ‘com.jakewharton:butterknife-compiler:8.8.1‘ implementation ‘com.jakewharton.timber:timber:4.7.0‘}
activity.main.xml
<?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@color/colorPrimary" android:paddingBottom="@dimen/activity_vertical_margin" android:paddingLeft="@dimen/activity_horizontal_margin" android:paddingRight="@dimen/activity_horizontal_margin" android:paddingTop="@dimen/activity_vertical_margin" tools:context="com.example.admin.emojify.MainActivity">
<ImageView android:id="@+id/image_view" android:layout_width="match_parent" android:layout_height="match_parent" android:layout_margin="@dimen/view_margin" android:contentDescription="@string/imageview_description" android:scaleType="fitStart" />
<TextView android:id="@+id/title_text_view" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_above="@+id/emojify_button" android:layout_centerHorizontal="true" android:layout_margin="@dimen/view_margin" android:text="@string/emojify_me" android:textAppearance="@style/TextAppearance.AppCompat.Display1" />
<Button android:id="@+id/emojify_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerHorizontal="true" android:layout_centerVertical="true" android:text="@string/go" android:textAppearance="@style/TextAppearance.AppCompat.Display1"/>
<android.support.design.widget.FloatingActionButton android:id="@+id/clear_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" android:layout_alignParentTop="true" android:visibility="gone" android:src="@drawable/ic_clear" app:backgroundTint="@android:color/white" app:fabSize="mini" />
<android.support.design.widget.FloatingActionButton android:id="@+id/save_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentEnd="true" android:layout_alignParentRight="true" android:layout_marginBottom="@dimen/fab_margins" android:layout_marginEnd="@dimen/fab_margins" android:layout_marginRight="@dimen/fab_margins" android:src="@drawable/ic_save" android:visibility="gone" app:backgroundTint="@android:color/white" />
<android.support.design.widget.FloatingActionButton android:id="@+id/share_button" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_alignParentLeft="true" android:layout_alignParentStart="true" android:layout_marginBottom="@dimen/fab_margins" android:layout_marginLeft="@dimen/fab_margins" android:layout_marginStart="@dimen/fab_margins" android:src="@drawable/ic_share" android:visibility="gone" app:backgroundTint="@android:color/white" />
</RelativeLayout>
file_paths.xml
<?xml version="1.0" encoding="utf-8"?><paths xmlns:android="http://schemas.android.com/apk/res/android"> <external-cache-path name="my_cache" path="." /> <external-path name="my_images" path="Pictures/" /></paths>
mainfest.xml
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android" package="com.example.admin.emojify">
<!-- 不支持相机无法安装--><uses-feature android:name="android.hardware.camera2" android:required="true"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application android:allowBackup="true" android:icon="@mipmap/ic_launcher" android:label="@string/app_name" android:roundIcon="@mipmap/ic_launcher_round" android:supportsRtl="true" android:theme="@style/AppTheme"> <activity android:name=".MainActivity"> <intent-filter> <action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <provider android:name="android.support.v4.content.FileProvider" android:authorities="com.example.android.fileprovider" android:exported="false" android:grantUriPermissions="true"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/file_paths" /> </provider> </application>
</manifest>
BitmapUtils
package com.example.admin.emojify;
import android.content.Context;import android.content.Intent;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.net.Uri;import android.os.Environment;import android.support.v4.content.FileProvider;import android.util.DisplayMetrics;import android.view.WindowManager;import android.widget.Toast;
import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.Date;import java.util.Locale;
public class BitmapUtils {
private static final String FILE_PROVIDER_AUTHORITY = "com.example.android.fileprovider";
static Bitmap resamplePic(Context context, String imagePath) { // Get device screen size information DisplayMetrics metrics = new DisplayMetrics(); WindowManager manager = (WindowManager) context.getSystemService(Context.WINDOW_SERVICE); manager.getDefaultDisplay().getMetrics(metrics); int targetH = metrics.heightPixels; int targetW = metrics.widthPixels; // Get the dimensions of the original bitmap BitmapFactory.Options bmOptions = new BitmapFactory.Options(); bmOptions.inJustDecodeBounds = true; BitmapFactory.decodeFile(imagePath, bmOptions); int photoW = bmOptions.outWidth; int photoH = bmOptions.outHeight; // Determine how much to scale down the image int scaleFactor = Math.min(photoW / targetW, photoH / targetH); // Decode the image file into a Bitmap sized to fill the View bmOptions.inJustDecodeBounds = false; bmOptions.inSampleSize = scaleFactor; return BitmapFactory.decodeFile(imagePath); }
static File createTempImageFile(Context context) throws IOException { String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date()); String imageFileName = "JPEG_" + timeStamp + "_"; File storageDir = context.getExternalCacheDir(); return File.createTempFile( imageFileName, /* prefix */ ".jpg", /* suffix */ storageDir /* directory */ ); }
static boolean deleteImageFile(Context context, String imagePath) { File imageFile = new File(imagePath); boolean deleted = imageFile.delete(); if (!deleted) { String errorMessage = context.getString(R.string.error); Toast.makeText(context, errorMessage, Toast.LENGTH_SHORT).show(); } return deleted; }
//通知相册有新的图片 private static void galleryAddPic(Context context, String imagePath) { Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE); File f = new File(imagePath); Uri contentUri = Uri.fromFile(f); mediaScanIntent.setData(contentUri); context.sendBroadcast(mediaScanIntent); }
static String saveImage(Context context, Bitmap image) { String savedImagePath = null; String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss", Locale.getDefault()).format(new Date()); String imageFileName = "JPEG_" + timeStamp + ".jpg"; File storageDir = new File( Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/Emojify"); boolean success = true; if (!storageDir.exists()) { success = storageDir.mkdirs(); } if (success) { File imageFile = new File(storageDir, imageFileName); savedImagePath = imageFile.getAbsolutePath(); try { OutputStream fOut = new FileOutputStream(imageFile); image.compress(Bitmap.CompressFormat.JPEG, 100, fOut); fOut.close(); } catch (Exception e) { e.printStackTrace(); } galleryAddPic(context, savedImagePath); String savedMessage = context.getString(R.string.saved_message, savedImagePath); Toast.makeText(context, savedMessage, Toast.LENGTH_SHORT).show();
} return savedImagePath; }
static void shareImage(Context context, String imagePath) { // Create the share intent and start the share activity File imageFile = new File(imagePath); Intent shareIntent = new Intent(Intent.ACTION_SEND); shareIntent.setType("image/*"); Uri photoURI = FileProvider.getUriForFile(context, FILE_PROVIDER_AUTHORITY, imageFile); shareIntent.putExtra(Intent.EXTRA_STREAM, photoURI); context.startActivity(shareIntent); }
}
Emojifier
package com.example.admin.emojify;
import android.content.Context;import android.graphics.Bitmap;import android.graphics.BitmapFactory;import android.graphics.Canvas;import android.util.SparseArray;import android.widget.Toast;import com.google.android.gms.vision.Frame;import com.google.android.gms.vision.face.Face;import com.google.android.gms.vision.face.FaceDetector;import timber.log.Timber;
public class Emojifier {
private static final float EMOJI_SCALE_FACTOR = .9f; private static final double SMILING_PROB_THRESHOLD = .15; private static final double EYE_OPEN_PROB_THRESHOLD = .5;
static Bitmap detectFacesandOverlayEmoji(Context context, Bitmap picture) { // Create the face detector, disable tracking and enable classifications FaceDetector detector = new FaceDetector.Builder(context) .setTrackingEnabled(false) .setClassificationType(FaceDetector.ALL_CLASSIFICATIONS) .build();
// Build the frame Frame frame = new Frame.Builder().setBitmap(picture).build(); // Detect the faces SparseArray<Face> faces = detector.detect(frame); // Log the number of faces Timber.d( "detectFaces: number of faces = " + faces.size()); // Initialize result bitmap to original picture Bitmap resultBitmap = picture; // If there are no faces detected, show a Toast message if (faces.size() == 0) { Toast.makeText(context, R.string.no_faces_message, Toast.LENGTH_SHORT).show(); } else {
// Iterate through the faces for (int i = 0; i < faces.size(); ++i) { Face face = faces.valueAt(i);
Bitmap emojiBitmap; switch (whichEmoji(face)) { case SMILE: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.smile); break; case FROWN: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.frown); break; case LEFT_WINK: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.leftwink); break; case RIGHT_WINK: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.rightwink); break; case LEFT_WINK_FROWN: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.leftwinkfrown); break; case RIGHT_WINK_FROWN: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.rightwinkfrown); break; case CLOSED_EYE_SMILE: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.closed_smile); break; case CLOSED_EYE_FROWN: emojiBitmap = BitmapFactory.decodeResource(context.getResources(), R.drawable.closed_frown); break; default: emojiBitmap = null; Toast.makeText(context, R.string.no_emoji, Toast.LENGTH_SHORT).show(); }
// Add the emojiBitmap to the proper position in the original image resultBitmap = addBitmapToFace(resultBitmap, emojiBitmap, face); } }
// Release the detector detector.release(); return resultBitmap; }
private static Emoji whichEmoji(Face face) { // Log all the probabilities Timber.d( "whichEmoji: smilingProb = " + face.getIsSmilingProbability()); Timber.d( "whichEmoji: leftEyeOpenProb = " + face.getIsLeftEyeOpenProbability()); Timber.d( "whichEmoji: rightEyeOpenProb = " + face.getIsRightEyeOpenProbability());
boolean smiling = face.getIsSmilingProbability() > SMILING_PROB_THRESHOLD; boolean leftEyeClosed = face.getIsLeftEyeOpenProbability() < EYE_OPEN_PROB_THRESHOLD; boolean rightEyeClosed = face.getIsRightEyeOpenProbability() < EYE_OPEN_PROB_THRESHOLD;
// Determine and log the appropriate emoji Emoji emoji; if(smiling) { if (leftEyeClosed && !rightEyeClosed) { emoji = Emoji.LEFT_WINK; } else if(rightEyeClosed && !leftEyeClosed){ emoji = Emoji.RIGHT_WINK; } else if (leftEyeClosed){ emoji = Emoji.CLOSED_EYE_SMILE; } else { emoji = Emoji.SMILE; } } else { if (leftEyeClosed && !rightEyeClosed) { emoji = Emoji.LEFT_WINK_FROWN; } else if(rightEyeClosed && !leftEyeClosed){ emoji = Emoji.RIGHT_WINK_FROWN; } else if (leftEyeClosed){ emoji = Emoji.CLOSED_EYE_FROWN; } else { emoji = Emoji.FROWN; } } // Log the chosen Emoji Timber.d( "whichEmoji: " + emoji.name()); return emoji; }
private static Bitmap addBitmapToFace(Bitmap backgroundBitmap, Bitmap emojiBitmap, Face face) {
// Initialize the results bitmap to be a mutable copy of the original image Bitmap resultBitmap = Bitmap.createBitmap(backgroundBitmap.getWidth(), backgroundBitmap.getHeight(), backgroundBitmap.getConfig());
// Scale the emoji so it looks better on the face float scaleFactor = EMOJI_SCALE_FACTOR;
// Determine the size of the emoji to match the width of the face and preserve aspect ratio int newEmojiWidth = (int) (face.getWidth() * scaleFactor); int newEmojiHeight = (int) (emojiBitmap.getHeight() * newEmojiWidth / emojiBitmap.getWidth() * scaleFactor);
// Scale the emoji emojiBitmap = Bitmap.createScaledBitmap(emojiBitmap, newEmojiWidth, newEmojiHeight, false);
// Determine the emoji position so it best lines up with the face float emojiPositionX = (face.getPosition().x + face.getWidth() / 2) - emojiBitmap.getWidth() / 2; float emojiPositionY = (face.getPosition().y + face.getHeight() / 2) - emojiBitmap.getHeight() / 3;
// Create the canvas and draw the bitmaps to it Canvas canvas = new Canvas(resultBitmap); canvas.drawBitmap(backgroundBitmap, 0, 0, null); canvas.drawBitmap(emojiBitmap, emojiPositionX, emojiPositionY, null); return resultBitmap; }
private enum Emoji { SMILE, FROWN, LEFT_WINK, RIGHT_WINK, LEFT_WINK_FROWN, RIGHT_WINK_FROWN, CLOSED_EYE_SMILE, CLOSED_EYE_FROWN }
}
MainActivity
package com.example.admin.emojify;
import android.Manifest;import android.content.DialogInterface;import android.content.Intent;import android.content.pm.PackageManager;import android.graphics.Bitmap;import android.net.Uri;import android.provider.MediaStore;import android.provider.Settings;import android.support.annotation.NonNull;
import android.support.design.widget.FloatingActionButton;import android.support.v4.app.ActivityCompat;import android.support.v4.content.ContextCompat;import android.support.v4.content.FileProvider;import android.support.v7.app.AlertDialog;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;import android.view.View;import android.widget.Button;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;
import java.io.File;import java.io.IOException;
import butterknife.BindView;import butterknife.ButterKnife;import butterknife.OnClick;import timber.log.Timber;
public class MainActivity extends AppCompatActivity {
private static final int REQUEST_IMAGE_CAPTURE = 1; private static final int REQUEST_STORAGE_PERMISSION = 1; private static final String FILE_PROVIDER_AUTHORITY = "com.example.android.fileprovider";
@BindView(R.id.image_view) ImageView mImageView; @BindView(R.id.emojify_button) Button mEmojifyButton; @BindView(R.id.share_button) FloatingActionButton mShareFab; @BindView(R.id.save_button) FloatingActionButton mSaveFab; @BindView(R.id.clear_button) FloatingActionButton mClearFab; @BindView(R.id.title_text_view) TextView mTitleTextView;
private String mTempPhotoPath; private Bitmap mResultsBitmap;
@Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); ButterKnife.bind(this); Timber.plant(new Timber.DebugTree()); }
@OnClick(R.id.emojify_button) public void emojifyMe(){ if (ContextCompat.checkSelfPermission(MainActivity.this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) { ActivityCompat.requestPermissions(MainActivity.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, REQUEST_STORAGE_PERMISSION); } else { // Launch the camera if the permission exists launchCamera();
} }
@Override public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) { switch (requestCode){ case REQUEST_STORAGE_PERMISSION:{ if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED) { launchCamera(); }else { Toast.makeText(MainActivity.this,getString(R.string.refused_authorization),Toast.LENGTH_SHORT).show(); new AlertDialog.Builder(MainActivity.this) .setMessage(getString(R.string.need_permission)) .setPositiveButton(getString(R.string.settings), new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) {
Uri uri=Uri.fromParts("package",getPackageName(),null); Intent intent=new Intent(Settings.ACTION_APPLICATION_DETAILS_SETTINGS,uri); startActivity(intent); } }).setNeutralButton(getString(R.string.cancel),null) .create() .show(); }break;
} } }
private void launchCamera() { // Create the capture image intent Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
// Ensure that there‘s a camera activity to handle the intent if (takePictureIntent.resolveActivity(getPackageManager()) != null) { // Create the temporary File where the photo should go File photoFile = null; try { photoFile = BitmapUtils.createTempImageFile(this); } catch (IOException ex) { // Error occurred while creating the File Timber.e("Create file failed"); } // Continue only if the File was successfully created if (photoFile != null) { // Get the path of the temporary file mTempPhotoPath = photoFile.getAbsolutePath(); // Get the content URI for the image file Uri photoURI = FileProvider.getUriForFile(this, FILE_PROVIDER_AUTHORITY, photoFile); // Add the URI so the camera can store the image takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI); // Launch the camera activity startActivityForResult(takePictureIntent, REQUEST_IMAGE_CAPTURE); } } }
@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == REQUEST_IMAGE_CAPTURE&&resultCode==RESULT_OK){ mEmojifyButton.setVisibility(View.GONE); mTitleTextView.setVisibility(View.GONE); mSaveFab.setVisibility(View.VISIBLE); mShareFab.setVisibility(View.VISIBLE); mClearFab.setVisibility(View.VISIBLE); mResultsBitmap = BitmapUtils.resamplePic(this, mTempPhotoPath); mResultsBitmap = Emojifier.detectFacesandOverlayEmoji(this, mResultsBitmap); mImageView.setImageBitmap(mResultsBitmap); }else { // Otherwise, delete the temporary image file BitmapUtils.deleteImageFile(this, mTempPhotoPath); } }
@OnClick(R.id.save_button)public void save(View view){ BitmapUtils.deleteImageFile(this, mTempPhotoPath); BitmapUtils.saveImage(this, mResultsBitmap);}
@OnClick(R.id.share_button)public void share(View view){ BitmapUtils.deleteImageFile(this, mTempPhotoPath); BitmapUtils.saveImage(this, mResultsBitmap); BitmapUtils.shareImage(this, mTempPhotoPath);}
@OnClick(R.id.clear_button)public void clear(View view){ mImageView.setImageResource(0); mEmojifyButton.setVisibility(View.VISIBLE); mTitleTextView.setVisibility(View.VISIBLE); mShareFab.setVisibility(View.GONE); mSaveFab.setVisibility(View.GONE); mClearFab.setVisibility(View.GONE); BitmapUtils.deleteImageFile(this, mTempPhotoPath);}
}
Github地址：https://github.com/NeoWu55/Emojify
原文地址：https://www.cnblogs.com/neowu/p/10927022.html
时间： 2024-10-10 16:43:44