问题描述
我的问题被意外关闭，提供的替代问题没有奏效 所以我的应用程序是一个图像到文本和文本到语音的应用程序。这个想法是从任何来源扫描文本并将其读出给用户。该应用程序的基本功能正在运行，当我单击主屏幕上的“捕获图像”时，它会打开相机、拍照并提取文本。但我还添加了另一个功能，用户可以通过点击图库图标从他的图库中手动添加图片。
所以问题是当我选择图库并选择我自己的图像时，它不会添加到主图像视图画布，而是使应用程序崩溃。代码中没有错误，只是无法运行。
以下是我附在 Google 云端硬盘上的 20 秒剪辑，用于向您展示确切的问题，以便大家更好地理解。我很接近！
https://drive.google.com/drive/folders/18oCeFkVEvi1xPv_O4DEI3EZz0TtVyZ36?usp=sharing
请让我知道问题是什么，因为 Android Studio 在项目运行时不会给出任何警告或错误。
MainActivity.Java
package com.example.textrecognition;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import androidx.appcompat.app.AlertDialog;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import android.Manifest;
import android.content.ContentValues;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.PackageManager;
import android.graphics.Bitmap;
import android.net.Uri;
import android.os.Bundle;
import android.os.PersistableBundle;
import android.provider.MediaStore;
import android.speech.tts.TextToSpeech;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;
import java.lang.Object;
import java.util.Locale;
import com.google.android.gms.tasks.OnFailureListener;
import com.google.android.gms.tasks.OnSuccessListener;
import com.google.android.gms.tasks.Task;
import com.google.firebase.ml.vision.FirebaseVision;
import com.google.firebase.ml.vision.common.FirebaseVisionImage;
import com.google.firebase.ml.vision.text.FirebaseVisionText;
import com.google.firebase.ml.vision.text.FirebaseVisionTextRecognizer;
import com.theartofdev.edmodo.cropper.CropImage;
import com.theartofdev.edmodo.cropper.CropImageView;
public class MainActivity extends AppCompatActivity implements TextToSpeech.OnInitListener {
ImageView imageView;
TextView textView;
private TextToSpeech engine;
//Action Bar Menu
@Override
public boolean onCreateOptionsMenu(Menu menu) {
//Inflate Menu
getMenuInflater().inflate(R.menu.menu_main,menu);
return true;
}
//Handle Action Bar clicks
@Override
public boolean onOptionsItemSelected(@NonNull MenuItem item) {
int id = item.getItemId();
if (id == R.id.addImage) {
showImageImportDialog();
}
if (id == R.id.settings) {
Toast.makeText(this,"Settings",Toast.LENGTH_SHORT).show();
}
return super.onOptionsItemSelected(item);
}
private void showImageImportDialog() {
//Options or Items displayed in dialog once it is clicked
String[] items = {"Camera","Gallery"};
AlertDialog.Builder dialog = new AlertDialog.Builder(this);
//Set TITLE
dialog.setTitle("Select Image");
dialog.setItems(items,new DialogInterface.OnClickListener() {
@Override
public void onClick(DialogInterface dialog,int which) {
if (which == 0) {
//Camera Option Clicked
if (!checkCameraPermission()) {
///Camera permission is not allowed,thats why we request it here
requestCameraPermission();
} else {
//Permission allowed,take picture
pickCamera();
}
}
if (which == 1) {
//Gallery Option Clicked
if (!checkStoragePermission()) {
//Storage Permissions Granted
requestStoragePermission();
} else {
//Permission allowed,take picture
pickGallery();
}
}
}
});
dialog.create().show(); //SHOW DIALOG
}
private void pickGallery() {
//Intent to Pick image from gallery
Intent intent = new Intent(Intent.ACTION_PICK);
//Set intent type to image
intent.setType("image/*");
startActivityForResult(intent,IMAGE_PICK_GALLERY_CODE);
int GET_FROM_GALLERY = 3;
startActivityForResult(new Intent(Intent.ACTION_PICK,android.provider.MediaStore.Images.Media.INTERNAL_CONTENT_URI),GET_FROM_GALLERY);
}
private void pickCamera() {
//Takes Image from Camera and saves it in storage for HIGH QUALITY
ContentValues values = new ContentValues();
values.put(MediaStore.Images.Media.TITLE,"NewPic"); //TITLE OF THE PIC
values.put(MediaStore.Images.Media.DESCRIPTION,"Images to text"); //Description
image_uri = getContentResolver().insert(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,values);
Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT,image_uri);
startActivityForResult(cameraIntent,IMAGE_PICK_CAMERA_CODE);
}
private void requestStoragePermission() {
ActivityCompat.requestPermissions(this,storagePermission,STORAGE_REQUEST_CODE);
}
private boolean checkStoragePermission() {
boolean result = ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) == (PackageManager.PERMISSION_GRANTED);
return result;
}
private void requestCameraPermission() {
ActivityCompat.requestPermissions(this,cameraPermission,CAMERA_REQUEST_CODE);
}
private boolean checkCameraPermission() {
boolean result = ContextCompat.checkSelfPermission(this,Manifest.permission.CAMERA) == (PackageManager.PERMISSION_GRANTED);
boolean result1 = ContextCompat.checkSelfPermission(this,Manifest.permission.WRITE_EXTERNAL_STORAGE) == (PackageManager.PERMISSION_GRANTED);
return result && result1;
}
//Also add gallery permission.
EditText mResultEt;
ImageView mPreviewIv;
///******So why are these specific codes used bro*******RESEARCH******
private static final int CAMERA_REQUEST_CODE = 200;
private static final int STORAGE_REQUEST_CODE = 400;
private static final int IMAGE_PICK_GALLERY_CODE = 1000;
private static final int IMAGE_PICK_CAMERA_CODE = 1001;
String cameraPermission[];
String storagePermission[];
Uri image_uri;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
engine = new TextToSpeech(this,this);
// mResultEt = findViewById(R.id.textId);
mPreviewIv = findViewById(R.id.imageId);
//camera permission
cameraPermission = new String[]{Manifest.permission.CAMERA,Manifest.permission.WRITE_EXTERNAL_STORAGE};
//Storage Permission
storagePermission = new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE};
//Find Image view
imageView = findViewById(R.id.imageId);
//Find text view
textView = findViewById(R.id.textId);
//check app level permission is granted for camera
if (checkSelfPermission(Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
//Grants Permission and Prompts User
requestPermissions(new String[]{Manifest.permission.CAMERA},101);
}
}
// TextToSpeech tts;
public void doProcess(View view) {
//Open Camera in Phone. Intent object is created to open camera once the capture image button is clicked
Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
//Activity result specifically used to continue using the app post taking pic
startActivityForResult(intent,101);
}
@Override
public void onActivityResult(int requestCode,int resultCode,@Nullable Intent data)
{ if(resultCode == RESULT_OK) {
super.onActivityResult(requestCode,resultCode,data);
// if(requestCode == IMAGE_PICK_CAMERA_CODE) {
// //Crops Image
// CropImage.activity(data.getData()).setGuidelines(CropImageView.Guidelines.ON)
// .start(this);
// }
// if(requestCode == IMAGE_PICK_GALLERY_CODE) {
// //Image received from gallery now cropped
// CropImage.activity(image_uri)
// .setGuidelines(CropImageView.Guidelines.ON) //Enabled image guidelines
// .start(this);
// }
// }
// if(requestCode == CropImage.CROP_IMAGE_ACTIVITY_REQUEST_CODE) {
// CropImage.ActivityResult result = CropImage.getActivityResult(data);
}
// else if(resultCode == CropImage.CROP_IMAGE_ACTIVITY_RESULT_ERROR_CODE) {
// Exception error = mResultEt.getError();
// }
// mResultEt.setText(getSupportActionBar().toString());
Bundle bundle = data.getExtras();
//From bundle extract image
Bitmap bitmap = (Bitmap) bundle.get("data");
//Set Image In ImageView
imageView.setImageBitmap(bitmap);
//Now we process image to extract text using Google ML Kit//
//Create a firebase vision object
FirebaseVisionImage firebaseVisionImage = FirebaseVisionImage.fromBitmap(bitmap);
//2ndStep Get an Instance of FirebaseVision
FirebaseVision firebaseVision = FirebaseVision.getInstance();
//3rd Create an instance of firebasevision text recognizer
FirebaseVisionTextRecognizer firebaseVisionTextRecognizer = firebaseVision.getOnDeviceTextRecognizer();
//4Th Step Create a task to process the image
Task<FirebaseVisionText> task = firebaseVisionTextRecognizer.processImage(firebaseVisionImage);
//5th Step,if task is successful
task.addOnSuccessListener(new OnSuccessListener<FirebaseVisionText>() {
@Override
public void onSuccess(FirebaseVisionText firebaseVisionText) {
String s = firebaseVisionText.getText();
textView.setText(s);
//Conversion of text to speech
String rawText = String.valueOf(textView.getText());
speakText(rawText);
; /* tts = new TextToSpeech(getApplicationContext(),new TextToSpeech.OnInitListener() {
@Override
public void onInit(int i) {
if (i == TextToSpeech.SUCCESS) {
//SELECTING LANGUAGE
int lang = tts.setLanguage(Locale.ENGLISH);
}
}
});*/
}
});
//6th. If task is failed
task.addOnFailureListener(new OnFailureListener() {
@Override
public void onFailure(@NonNull Exception e) {
Toast.makeText(getApplicationContext(),e.getMessage(),Toast.LENGTH_LONG).show();
}
});
}
public void speakText(String textContents) {
//String textContents = text.getText().toString();
engine.speak(textContents,TextToSpeech.QUEUE_FLUSH,null,null);
}
@Override
protected void onPostCreate(@Nullable Bundle savedInstanceState) {
super.onPostCreate(savedInstanceState);
}
@Override
public void onInit(int i) {
if (i == TextToSpeech.SUCCESS) {
//Setting speech Language
engine.setLanguage(Locale.ENGLISH);
engine.setPitch(1);
}
}
///Handle Permission Result
@Override
public void onRequestPermissionsResult(int requestCode,@NonNull String[] permissions,@NonNull int[] grantResults) {
super.onRequestPermissionsResult(requestCode,permissions,grantResults);
switch (requestCode) {
case CAMERA_REQUEST_CODE:
if (grantResults.length > 0) {
boolean cameraAccepted = grantResults[0] ==
PackageManager.PERMISSION_GRANTED;
//Changed from 0 to 1
boolean writeStorageAccepted = grantResults[1] ==
PackageManager.PERMISSION_GRANTED;
if (cameraAccepted && writeStorageAccepted) {
pickCamera();
} else {
Toast.makeText(this,"permission denied",Toast.LENGTH_SHORT).show();
}
}
break;
case STORAGE_REQUEST_CODE: {
boolean writeStorageAccepted = grantResults[0] ==
PackageManager.PERMISSION_GRANTED;
if (writeStorageAccepted) {
pickGallery();
} else {
Toast.makeText(this,Toast.LENGTH_SHORT).show();
}
}
break;
}
}
//Handle Image Result,CROPPING
}
Activity_MainXML
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical"
tools:context=".MainActivity">
<!-- Added scroll view,made sure scroll view has only one child in it. Very time consuming -->
<ScrollView
android:layout_width="match_parent"
android:layout_height="match_parent"
tools:ignore="UselessParent">
<LinearLayout
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:orientation="vertical"
tools:ignore="UselessLeaf" >
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Image Preview:"
android:verticalScrollbarPosition="defaultPosition"
android:textColor="@color/design_default_color_primary_dark"
android:textSize="22sp"
tools:ignore="HardcodedText">
</TextView>
<ImageView
android:id="@+id/imageId"
android:layout_width="353dp"
android:layout_height="368dp"
android:layout_margin="26dp" />
<Button
android:layout_width="match_parent"
android:layout_height="63dp"
android:onClick="doProcess"
android:text="Capture Image" />
<TextView
android:id="@+id/textId"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Result:"
android:textColor="@color/design_default_color_primary_dark"
android:textSize="22sp" />
</LinearLayout>
</ScrollView>
</LinearLayout>
AndroidManifest XML
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.textrecognition">
<!-- User Permissions to give access to camera -->
<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="Dream Eye Text Recognizer"
android:roundIcon="@mipmap/ic_launcher_round"
android:supportsRtl="true"
android:theme="@style/Theme.TextRecognition">
<activity android:name=".SplashScreen">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity
android:name=".ui.login.LoginActivity"
android:label="@string/title_activity_login" />
<meta-data
android:name="com.google.firebase.ml.vision.DEPENDENCIES"
android:value="ocr" />
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
<!-- Crop image Activity -->
<activity android:name="com.theartofdev.edmodo.cropper.CropImageActivity"
android:theme="@style/Base.Theme.AppCompat"/> <!-- or AppTheme optional (needed if default theme has no action bar) -->
</application>
</manifest>
*构建 Gradle.App
plugins {
id 'com.android.application'
id 'com.google.gms.google-services'
}
android {
compileSdkVersion 30
buildToolsVersion "30.0.3"
defaultConfig {
applicationId "com.example.textrecognition"
minSdkVersion 23
targetSdkVersion 30
versionCode 1
versionName "1.0"
testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'),'proguard-rules.pro'
}
}
compileOptions {
sourceCompatibility JavaVersion.VERSION_1_8
targetCompatibility JavaVersion.VERSION_1_8
}
}
dependencies {
implementation 'androidx.appcompat:appcompat:1.2.0'
//noinspection GradleCompatible
implementation 'com.android.support:cardview-v7:28.0.0'
implementation 'com.google.android.material:material:1.3.0'
implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
//noinspection OutdatedLibrary
implementation 'com.google.firebase:firebase-ml-vision:24.0.1'
implementation 'androidx.annotation:annotation:1.1.0'
implementation 'androidx.lifecycle:lifecycle-livedata-ktx:2.2.0'
implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.2.0'
testImplementation 'junit:junit:4.+'
androidTestImplementation 'androidx.test.ext:junit:1.1.2'
androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
//CROPPING IMAGE LIBRARY
implementation'com.theartofdev.edmodo:android-image-cropper:2.8.+'
}
解决方法
暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！
如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。
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