我的照片编辑器Android应用程序存在一些问题。通过应用程序从20MegaPixel（5184x3880）相机捕获图像后，我将通过位图将图像的大小调整为15MegaPixel（4477 x 3351），然后将图像保存在手机的Gallery / Photos文件夹中
以下是HomeActivity代码：
package com.saashtechs.photoeditor;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.provider.MediaStore.Images.Media;
import android.support.annotation.NonNull;
import android.support.v4.app.ActivityCompat;
import android.support.v4.content.ContextCompat;
import android.support.v4.content.FileProvider;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.view.View;
import android.widget.Toast;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DateFormat;
import java.util.Date;
import java.util.Objects;
import java.io.InputStream;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.widget.ImageView;
import static android.Manifest.permission.CAMERA;
import static android.Manifest.permission.READ_EXTERNAL_STORAGE;
import static android.Manifest.permission.WRITE_EXTERNAL_STORAGE;
import static android.content.pm.PackageManager.PERMISSION_GRANTED;
public class HomeActivity extends AppCompatActivity {
private static final String TAG = "HomeActivity";
private static final int GALLERY_RESULT = 1;
private static final int CAMERA_RESULT = 2;
private static final String FILE_PROVIDER_AUTHORITY = "com.saashtechs.photoeditor";
private static final int CAMERA_PERMISSION_REQ_CODE = 1001;
private static final int STORAGE_PERMISSION_REQ_CODE = 1002;
private Uri imageToUploadUri;
private String mCapturedImagePath;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_home);
}
public void openCamera(View view) {
// check for camera permission if not granted before
if (ContextCompat.checkSelfPermission(this, CAMERA) != PERMISSION_GRANTED) {
String[] cameraPermission = {CAMERA};
ActivityCompat.requestPermissions(this, cameraPermission, CAMERA_PERMISSION_REQ_CODE);
} else {
dispatchImageCaptureIntent();
}
}
public void openGallery(View view) {
// check for storage permission if not granted before
if (ContextCompat.checkSelfPermission(this, READ_EXTERNAL_STORAGE) != PERMISSION_GRANTED ||
ContextCompat.checkSelfPermission(this, WRITE_EXTERNAL_STORAGE) != PERMISSION_GRANTED) {
String[] storagePermissions = {READ_EXTERNAL_STORAGE, WRITE_EXTERNAL_STORAGE};
ActivityCompat.requestPermissions(this, storagePermissions, STORAGE_PERMISSION_REQ_CODE);
} else {
dispatchGalleryIntent();
}
}
private void dispatchGalleryIntent() {
Intent galleryIntent = new Intent(Intent.ACTION_PICK, Media.EXTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, GALLERY_RESULT);
}
private void dispatchImageCaptureIntent() {
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
if (cameraIntent.resolveActivity(getPackageManager()) != null) {
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException e) {
e.printStackTrace();
}
if (photoFile != null) {
Uri photoFileUri = FileProvider.getUriForFile(this, FILE_PROVIDER_AUTHORITY, photoFile);
Log.d(TAG, "dispatchImageCaptureIntent:photoFileUri: " + photoFile.toString());
//Add URI to imageToUploadUri. You forgot to add it.
imageToUploadUri = photoFileUri;
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoFileUri);
startActivityForResult(cameraIntent, CAMERA_RESULT);
}
}
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions,
@NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode, permissions, grantResults);
switch (requestCode) {
case CAMERA_PERMISSION_REQ_CODE:
if (grantResults[0] == PERMISSION_GRANTED) {
dispatchImageCaptureIntent();
} else {
Toast.makeText(this, "Required camera permission not granted", Toast.LENGTH_SHORT).show();
}
break;
case STORAGE_PERMISSION_REQ_CODE:
if (grantResults[0] == PERMISSION_GRANTED) {
dispatchGalleryIntent();
} else {
Toast.makeText(this, "Required storage permission not granted", Toast.LENGTH_SHORT)
.show();
}
break;
default:
throw new IllegalArgumentException("Unexpected request code");
}
}
private File createImageFile() throws IOException {
String timeStamp = DateFormat.getDateTimeInstance().format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalFilesDir(Environment.DIRECTORY_PICTURES);
File image = File.createTempFile(imageFileName, ".jpg", storageDir);
mCapturedImagePath = image.getAbsolutePath();
Log.d(TAG, "createImageFile: " + mCapturedImagePath);
return image;
}
private Bundle uriToBundle(Uri imageUri) {
Bundle bundle = new Bundle();
bundle.putString(MainActivity.IMAGE_URI, imageUri.toString());
return bundle;
}
public Bitmap resizeBitmap(Bitmap getBitmap, int maxSize) {
int width = getBitmap.getWidth();//5184
int height = getBitmap.getHeight();//3880
double resized_image;
if (width >= height && width > maxSize) {
resized_image = width / height;
width = maxSize;
height = (int) (maxSize / resized_image);
} else if (height >= width && height > maxSize) {
resized_image = height / width;
height = maxSize;
width = (int) (maxSize / resized_image);
}
return Bitmap.createScaledBitmap(getBitmap, width, height, false);
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
if (requestCode == GALLERY_RESULT) {
Uri imageUri = data.getData();
startActivity(MainActivity.getIntent(this, uriToBundle(Objects.requireNonNull(imageUri))));
} else if (requestCode == CAMERA_RESULT) {
File imageFile = new File(mCapturedImagePath);
Bitmap image = BitmapFactory.decodeFile(mCapturedImagePath);
image = Bitmap.createScaledBitmap(image, 4477, 3351, false);
image = resizeBitmap(image, 4477);
ByteArrayOutputStream bytes = new ByteArrayOutputStream();
image.compress(Bitmap.CompressFormat.JPEG, 100, bytes);
try {
File file = new File(Environment.getExternalStorageDirectory() + File.separator + "filename.jpg");
boolean result;
result = file.createNewFile();
if (result) {
FileOutputStream fo = new FileOutputStream(imageFile);
fo.write(bytes.toByteArray());
fo.close();
}
} catch(IOException ie) {
ie.printStackTrace();
}
startActivity(MainActivity.getIntent(this, uriToBundle(Objects.requireNonNull(imageToUploadUri))));
}
} else {
Toast.makeText(this, "Image not loaded.", Toast.LENGTH_SHORT).show();
}
}
public static Intent getIntent(Context context) {
return new Intent(context, HomeActivity.class);
}
}
以下是MainActivity代码：
package com.saashtechs.photoeditor;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.util.Log;
import android.widget.ImageView;
import com.adobe.creativesdk.aviary.AdobeImageIntent;
public class MainActivity extends AppCompatActivity {
public static final String IMAGE_URI = "IMAGE_URI_KEY";
private static final String TAG = "MainActivity";
private static final int IMAGE_EDITOR_RESULT = 1;
private ImageView mEditedImageView;
@Override protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mEditedImageView = (ImageView) findViewById(R.id.edited_image_view);
Bundle extras = getIntent().getExtras();
if (extras != null) {
Uri imageUri = Uri.parse(getIntent().getExtras().getString(IMAGE_URI));
Intent imageEditorIntent = new AdobeImageIntent.Builder(this).setData(imageUri).build();
startActivityForResult(imageEditorIntent, IMAGE_EDITOR_RESULT);
finish();
}
}
@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case IMAGE_EDITOR_RESULT:
Uri editedImageUri = data.getParcelableExtra(AdobeImageIntent.EXTRA_OUTPUT_URI);
Log.d(TAG, "editedImageUri: " + editedImageUri.toString());
Bundle extra = data.getExtras();
if (extra != null) {
boolean changed = extra.getBoolean(AdobeImageIntent.EXTRA_OUT_BITMAP_CHANGED);
Log.d(TAG, "Image edited: " + changed);
if (changed) {
mEditedImageView.setImageURI(editedImageUri);
}
}
break;
default:
throw new IllegalArgumentException("Unexpected request code");
}
}
}
public static Intent getIntent(Context context, Bundle bundle) {
Intent intent = new Intent(context, MainActivity.class);
if (bundle != null) {
intent.putExtras(bundle);
}
return intent;
}
}
因此，当我捕获图像后，当用户被带去编辑应用程序时，它没有，捕获图像后，我又回到了主页
错误日志为：
2018-11-04 14:56:40.629 20408-21385/com.saashtechs.photoeditor bitmap.size: 5184x3880
2018-11-04 14:56:40.629 20408-21385/com.saashtechs.photoeditor resize(15)
2018-11-04 14:56:40.629 20408-21385/com.saashtechs.photoeditor bitmap MP: 20, max MP: 15
2018-11-04 14:56:40.629 20408-21385/com.saashtechs.photoeditor Image must be resized! 20MP -> 15MP
2018-11-04 14:56:40.629 20408-21385/com.saashtechs.photoeditor target: 15MP = (4477x3351), max size: 4477
2018-11-04 14:56:40.629 20408-21385/com.saashtechs.photoeditor original: 20MP = (5184x3880)
2018-11-04 14:56:40.629 20408-21385/com.saashtechs.photoeditor maxWidth: 4477, maxHeight: 3351
你能告诉我我要去哪里错吗？
预先感谢
答案 0 :(得分：-2)
if (extras != null) {
Uri imageUri = Uri.parse(getIntent().getExtras().getString(IMAGE_URI));
Intent imageEditorIntent = new AdobeImageIntent.Builder(this).setData(imageUri).build();
startActivityForResult(imageEditorIntent, IMAGE_EDITOR_RESULT);
// below line of code is not possible. your trying to receive result over
//here.
// . but your finishing it before it receives result
finish();
}
一旦收到数据，使用下面的方法关闭活动。使用设置结果方法传递数据，然后关闭。因此您的活动将具有已编辑的数据。
更好的解决方案-您不需要这种中间活动。
@Override protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (resultCode == RESULT_OK) {
switch (requestCode) {
case IMAGE_EDITOR_RESULT:
Uri editedImageUri = data.getParcelableExtra(AdobeImageIntent.EXTRA_OUTPUT_URI);
Log.d(TAG, "editedImageUri: " + editedImageUri.toString());
Bundle extra = data.getExtras();
if (extra != null) {
boolean changed = extra.getBoolean(AdobeImageIntent.EXTRA_OUT_BITMAP_CHANGED);
Log.d(TAG, "Image edited: " + changed);
if (changed) {
mEditedImageView.setImageURI(editedImageUri);
}
}
break;
default:
throw new IllegalArgumentException("Unexpected request code");
}
}
}
作为指导-以下代码在android中是非常糟糕的做法
public static Intent getIntent(Context context, Bundle bundle) {
Intent intent = new Intent(context, MainActivity.class);
if (bundle != null) {
intent.putExtras(bundle);
}
return intent;
}
好习惯。
private void navigateToPhotoEditActivity(Context context, Bundle bundle)
{
Intent intent = new Intent(context, MainActivity.class);
if (bundle != null) {
intent.putExtras(bundle);
}
startActivity(intent);
}