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私のアプリには2つの問題があります。最初の問題は、私はIOExceptionを取得することです：私はすでに私が必要とするすべてのアクセス許可を持っていると思うtho私は拒否されたアクセス許可。カメラの許可IOExceptionとクラスの分離
私がphotoFile = createImageFile（）を実行すると、dispatchTakePictureIntentメソッドがパーミッションエラーを引き起こします。
私が残している問題は、すべてのカメラとファイルの作成を別々のクラスに分けたいということです。しかし、良い方法でクラス間で情報/変数データを渡す最善の方法は何ですか。コールバックやオブザーバを使用する必要がありますか？私は誰かがこれを行う方法の簡単な例を提供できるなら、本当にうれしいでしょう。
MainActivity：
public class MainActivity extends AppCompatActivity {
EncodeToBase64 encode = new EncodeToBase64();
String lastPhotoAsBase64;
ImageView mImageView;
ImageView mBackground;
private static int RESULT = 1;
static final int REQUEST_TAKE_PHOTO = 1;
static final int PICK_IMAGE_REQUEST = 2;
String mCurrentPhotoPath;
TextView textView;
ProgressBar progress;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M &&
checkSelfPermission(Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED) {
requestPermissions(new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, RESULT);
}
setContentView(R.layout.activity_main);
mImageView = findViewById(R.id.imageView);
mBackground = findViewById(R.id.backgroundImage);
Button cameraButton = findViewById(R.id.cameraButton);
Button galleryButton = findViewById(R.id.galleryButton);
textView = findViewById(R.id.textView);
progress = findViewById(R.id.progressBar);
cameraButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
dispatchTakePictureIntent();
}
});
galleryButton.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent galleryIntent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.INTERNAL_CONTENT_URI);
startActivityForResult(galleryIntent, PICK_IMAGE_REQUEST);
}
});
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REQUEST_TAKE_PHOTO && resultCode == RESULT_OK) {
try {
setPic();
} catch (IOException e) {
e.printStackTrace();
}
} else if (requestCode == PICK_IMAGE_REQUEST && data.getData() != null) {
Uri selectedImage = data.getData();
try {
String[] filePathColumn = {MediaStore.Images.Media.DATA};
Cursor cursor = getContentResolver().query(selectedImage, filePathColumn, null, null, null);
cursor.moveToFirst();
int columnIndex = cursor.getColumnIndex(filePathColumn[0]);
String picturePath = cursor.getString(columnIndex);
mCurrentPhotoPath = picturePath;
cursor.close();
setPic();
} catch (IOException e) {
e.printStackTrace();
}
}
}
private File createImageFile() throws IOException {
// Create an image file name
String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
String imageFileName = "JPEG_" + timeStamp + "_";
File storageDir = getExternalStoragePublicDirectory(DIRECTORY_PICTURES);
File image = File.createTempFile(
imageFileName, /* prefix */
".jpg", /* suffix */
storageDir /* directory */
);
// Save a file: path for use with ACTION_VIEW intents
mCurrentPhotoPath = image.getAbsolutePath();
galleryAddPic();
return image;
}
private static int exifToDegrees(int exifOrientation) {
if (exifOrientation == ExifInterface.ORIENTATION_ROTATE_90) {
return 90;
} else if (exifOrientation == ExifInterface.ORIENTATION_ROTATE_180) {
return 180;
} else if (exifOrientation == ExifInterface.ORIENTATION_ROTATE_270) {
return 270;
}
return 0;
}
private void galleryAddPic() {
Intent mediaScanIntent = new Intent(Intent.ACTION_MEDIA_SCANNER_SCAN_FILE);
File f = new File(mCurrentPhotoPath);
Uri contentUri = Uri.fromFile(f);
mediaScanIntent.setData(contentUri);
this.sendBroadcast(mediaScanIntent);
}
public void setPic() throws IOException {
// Get the dimensions of the View
int targetW = mImageView.getWidth();
int targetH = mImageView.getHeight();
// Get the dimensions of the bitmap
BitmapFactory.Options bmOptions = new BitmapFactory.Options();
bmOptions.inJustDecodeBounds = true;
//BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
BitmapFactory.decodeFile(mCurrentPhotoPath, 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;
bmOptions.inPurgeable = true;
Bitmap bitmap = BitmapFactory.decodeFile(mCurrentPhotoPath, bmOptions);
ExifInterface exif = new ExifInterface(mCurrentPhotoPath);
int rotation = exif.getAttributeInt(ExifInterface.TAG_ORIENTATION, ExifInterface.ORIENTATION_NORMAL);
int rotationInDegrees = exifToDegrees(rotation);
//int deg = rotationInDegrees;
Matrix matrix = new Matrix();
if (rotation != 0f) {
matrix.preRotate(rotationInDegrees);
bitmap = Bitmap.createBitmap(bitmap, 0, 0, bitmap.getWidth(), bitmap.getHeight(), matrix, true);
}
lastPhotoAsBase64 = encode.encode(bitmap);
if (lastPhotoAsBase64 != null) {
new postData().execute(lastPhotoAsBase64);
} else {
Toast.makeText(MainActivity.this, "No base64 data found!", Toast.LENGTH_LONG).show();
}
mImageView.setImageBitmap(bitmap);
}
public void dispatchTakePictureIntent() {
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 File where the photo should go
File photoFile = null;
try {
photoFile = createImageFile();
} catch (IOException ex) {
// Error occurred while creating the File
ex.printStackTrace();
}
// Continue only if the File was successfully created
if (photoFile != null) {
Uri photoURI = FileProvider.getUriForFile(this,
"com.example.fileprovider",
photoFile);
takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, photoURI);
startActivityForResult(takePictureIntent, REQUEST_TAKE_PHOTO);
}
}
}
public class postData extends AsyncTask<String, Void, String> {
@Override
protected String doInBackground(String... strings) {
HttpConnectionActivity hh = new HttpConnectionActivity();
String temp = hh.HttpConnection(strings[0]);
return temp;
}
@Override
protected void onPreExecute() {
textView.setVisibility(View.INVISIBLE);
progress.setVisibility(View.VISIBLE);
}
@Override
protected void onPostExecute(String s) {
progress.setVisibility(View.INVISIBLE);
JSONObject jsonRaw = null;
String age = null;
String gender = null;
String result = null;
if(!(s.contains("5002"))) {
try {
jsonRaw = new JSONObject(s);
age = jsonRaw.getJSONArray("images").getJSONObject(0).getJSONArray("faces").getJSONObject(0).getJSONObject("attributes").getString("age");
gender = jsonRaw.getJSONArray("images").getJSONObject(0).getJSONArray("faces").getJSONObject(0).getJSONObject("attributes").getJSONObject("gender").getString("type");
result = "Du är en " + ((gender.equals("M")) ? "Man" : "Kvinna") + " som är " + age + " år gammal";
} catch (JSONException e) {
e.printStackTrace();
}
}
else{
result = "Inga ansikten hittades";
}
textView.setText(result);
textView.setVisibility(View.VISIBLE);
}
}
}
のAndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.cliff.camera2">
<uses-feature android:name="android.hardware.camera"
android:required="true" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"
android:maxSdkVersion="18" />
<uses-permission android:name="android.permission.INTERNET"/>
<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"></meta-data>
</provider>
</application>
</manifest>
file_paths.xml
<?xml version="1.0" encoding="utf-8"?>
<paths xmlns:android="http://schemas.android.com/apk/res/android">
<external-path name="my_images" path="DCIM/SkitApp" />
</paths>
正直言って、これは本当に混乱しています...私はちょうどどこかからコードをコピーして貼り付けないことをお勧めしますあなたがそれらを完全に消化した後に、批判的に考えてコードを書くようにしてください。プログラミングの基本概念、特にオブジェクト指向プログラミングの概念と設計を詳しく見てください。あなたは本当にそれが必要になります。あなたのエラーでは、すべてのコードをアップロードするだけではありません。代わりに、エラーメッセージと例外を実際にトリガーする特定のコードをアップロードしてください。例外は、どこに間違っていたかを追跡するためにコールスタックトレースを常に残します。 – viz