I am trying to take a photo from the phone's camera using this code:
activity_main.xml:
<?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical" > <Button android:id="@+id/btnCapture" android:layout_width="wrap_content" android:layout_height="wrap_content" android:text="Camera" /> </LinearLayout> MainActivity.java:
public class CameraDemoActivity extends Activity { int TAKE_PHOTO_CODE = 0; public static int count = 0; /** Called when the activity is first created. */ @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); // Here, we are making a folder named picFolder to store // pics taken by the camera using this application. final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/"; File newdir = new File(dir); newdir.mkdirs(); Button capture = (Button) findViewById(R.id.btnCapture); capture.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Here, the counter will be incremented each time, and the // picture taken by camera will be stored as 1.jpg,2.jpg // and likewise. count++; String file = dir+count+".jpg"; File newfile = new File(file); try { newfile.createNewFile(); } catch (IOException e) { } Uri outputFileUri = Uri.fromFile(newfile); Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri); startActivityForResult(cameraIntent, TAKE_PHOTO_CODE); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) { Log.d("CameraDemo", "Pic saved"); } } } I also added these permissions to Manifest.xml:
<uses-permission android:name="android.permission.CAMERA"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> But I get this error message:
android.os.FileUriExposedException: file:///storage/emulated/0/Pictures/picFolder/1.jpg exposed beyond app through ClipData.Item.getUri()
What is the problem and how can I fix it?
EDIT: this is the updated code:
MainActivity:
package com.m.textdetection; import android.Manifest; import android.content.Intent; import android.content.pm.PackageManager; import android.icu.text.SimpleDateFormat; import android.net.Uri; import android.os.Environment; import android.provider.MediaStore; 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.os.Bundle; import android.util.Log; import android.view.View; import android.widget.Button; import android.widget.ImageView; import java.io.File; import java.io.IOException; import java.util.Date; public class MainActivity extends AppCompatActivity { private MyTessOCR mTessOCR = new MyTessOCR(MainActivity.this); private Button takePictureButton; private ImageView imageView; /* @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); takePictureButton = (Button) findViewById(R.id.button_image); imageView = (ImageView) findViewById(R.id.imageview); if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) { takePictureButton.setEnabled(false); ActivityCompat.requestPermissions(this, new String[] { Manifest.permission.CAMERA, Manifest.permission.WRITE_EXTERNAL_STORAGE }, 0); } } @Override public void onRequestPermissionsResult(int requestCode, String[] permissions, int[] grantResults) { if (requestCode == 0) { if (grantResults.length > 0 && grantResults[0] == PackageManager.PERMISSION_GRANTED && grantResults[1] == PackageManager.PERMISSION_GRANTED) { takePictureButton.setEnabled(true); } } } public void takePicture(View view) { Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); file = Uri.fromFile(getOutputMediaFile()); intent.putExtra(MediaStore.EXTRA_OUTPUT, file); startActivityForResult(intent, 100); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { if (requestCode == 100) { if (resultCode == RESULT_OK) { imageView.setImageURI(File); } } } private static File getOutputMediaFile(){ File mediaStorageDir = new File(Environment.getExternalStoragePublicDirectory( Environment.DIRECTORY_PICTURES), "CameraDemo"); if (!mediaStorageDir.exists()){ if (!mediaStorageDir.mkdirs()){ return null; } } String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date()); return new File(mediaStorageDir.getPath() + File.separator + "IMG_"+ timeStamp + ".jpg"); } */ int TAKE_PHOTO_CODE = 0; public static int count = 0; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); final String dir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES) + "/picFolder/"; File newdir = new File(dir); newdir.mkdirs(); Button capture = (Button) findViewById(R.id.btnCapture); capture.setOnClickListener(new View.OnClickListener() { public void onClick(View v) { // Here, the counter will be incremented each time, and the // picture taken by camera will be stored as 1.jpg,2.jpg // and likewise. count++; String file = dir+count+".jpg"; File newfile = new File(file); try { newfile.createNewFile(); } catch (IOException e) { } // Uri outputFileUri = Uri.fromFile(newfile); Uri outputFileUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, newfile); Intent cameraIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE); cameraIntent.putExtra(MediaStore.EXTRA_OUTPUT, outputFileUri); startActivityForResult(cameraIntent, TAKE_PHOTO_CODE); } }); } @Override protected void onActivityResult(int requestCode, int resultCode, Intent data) { super.onActivityResult(requestCode, resultCode, data); if (requestCode == TAKE_PHOTO_CODE && resultCode == RESULT_OK) { Log.d("CameraDemo", "Pic saved"); } } private void doOCR() { // String temp = mTessOCR.getOCRResult(bitmap); } } Manifest:
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" package="com.m.textdetection"> <uses-permission android:name="android.permission.CAMERA"/> <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/> <uses-permission android:name="android.permission.READ_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="${applicationId}.my.package.name.provider" android:exported="false" android:grantUriPermissions="true" tools:replace="android:authorities"> <meta-data android:name="android.support.FILE_PROVIDER_PATHS" android:resource="@xml/provider_paths" tools:replace="android:resource"/> </provider> </application> </manifest> build.gradle(app):
apply plugin: 'com.android.application' android { compileSdkVersion 27 buildToolsVersion "27.0.3" defaultConfig { applicationId "com.m.textdetection" minSdkVersion 21 targetSdkVersion 27 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" } buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' }) compile 'com.android.support:appcompat-v7:27.0.2' compile 'com.android.support.constraint:constraint-layout:1.0.2' testCompile 'junit:junit:4.12' compile 'com.rmtheis:tess-two:6.0.3' compile 'com.android.support:support-v4:27.0.2' } And this is the new error:
java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.res.XmlResourceParser android.content.pm.ProviderInfo.loadXmlMetaData(android.content.pm.PackageManager, java.lang.String)' on a null object reference
Occurs in this line:
Uri outputFileUri = FileProvider.getUriForFile(MainActivity.this, BuildConfig.APPLICATION_ID, newfile); Edir2:
package com.m.textdetection; import android.content.Context; import android.content.res.AssetManager; import android.graphics.Bitmap; import android.os.Environment; import android.util.Log; import com.googlecode.tesseract.android.TessBaseAPI; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import java.io.OutputStream; public class MyTessOCR { private String datapath; private TessBaseAPI mTess; Context context; public MyTessOCR(Context context) { this.context = context; datapath = Environment.getExternalStorageDirectory() + "/ocrctz/"; File dir = new File(datapath + "/tessdata/"); File file = new File(datapath + "/tessdata/" + "eng.traineddata"); if (!file.exists()) { Log.d("mylog", "in file doesn't exist"); dir.mkdirs(); copyFile(context); } mTess = new TessBaseAPI(); String language = "eng"; mTess.init(datapath, language); //Auto only mTess.setPageSegMode(TessBaseAPI.PageSegMode.PSM_AUTO_ONLY); } public void stopRecognition() { mTess.stop(); } public String getOCRResult(Bitmap bitmap) { mTess.setImage(bitmap); String result = mTess.getUTF8Text(); return result; } public void onDestroy() { if (mTess != null) mTess.end(); } private void copyFile(Context context) { AssetManager assetManager = context.getAssets(); try { InputStream in = assetManager.open("eng.traineddata"); OutputStream out = new FileOutputStream(datapath + "/tessdata/" + "eng.traineddata"); byte[] buffer = new byte[1024]; int read = in.read(buffer); while (read != -1) { out.write(buffer, 0, read); read = in.read(buffer); } } catch (Exception e) { Log.d("mylog", "couldn't copy with the following error : "+e.toString()); } } }