[WebView] Uploading pictures from camera and gallery in Android application, need help

Hello, I'm building a webview application. There is a feature of uploading images through the form on the site. What I am trying to do is: When File input is clicked, the user is asked the option "Select from camera or gallery". I did this. Image can be uploaded from the gallery. But after taking a picture with the camera, the input remains blank. The picture disappears. It works fine on Android 5 version, but I have this problem on versions such as Android 10, 9, 8, 7, 6. I think the reason why it doesn't work on Android 10 is the removal of getExternalStoragePublicDirectory support. But it doesn't work on Android 6-7-8-9 version either. I'm a just back-end web developer. I'm not good at mobile programming. I would appreciate it if you can send source code or project. Please help me. Thank you!

My code:

Code (Java):

1. import android.Manifest;
2. import android.annotation.SuppressLint;
3. import android.app.Activity;
4. import android.app.AlertDialog;
5. import android.content.Context;
6. import android.content.DialogInterface;
7. import android.content.Intent;
8. import android.content.pm.ApplicationInfo;
9. import android.content.pm.PackageManager;
10. import android.content.res.Configuration;
11. import android.net.ConnectivityManager;
12. import android.net.Uri;
13. import android.os.Build;
14. import android.os.Bundle;
15. import android.os.Environment;
16. import android.provider.MediaStore;
17. import android.util.Log;
18. import android.view.KeyEvent;
19. import android.view.View;
20. import android.webkit.ValueCallback;
21. import android.webkit.WebChromeClient;
22. import android.webkit.WebSettings;
23. import android.webkit.WebView;
24. import android.webkit.WebViewClient;
25. import android.widget.Button;
26. import android.widget.Toast;
27.  
28. import androidx.annotation.NonNull;
29. import androidx.appcompat.app.AppCompatActivity;
30. import androidx.core.app.ActivityCompat;
31. import androidx.core.content.ContextCompat;
32.  
33. import java.io.File;
34. import java.io.IOException;
35. import java.text.SimpleDateFormat;
36. import java.util.Date;
37. import java.util.List;
38.  
39. public class Ucuncu_ekran extends AppCompatActivity{
40. WebView webView;
41. private static final String TAG = Ucuncu_ekran.class.getSimpleName();
42. private String mCM;
43. private ValueCallback mUM;
44. private ValueCallback<Uri[]> mUMA;
45. private final static int FCR=1;
46.  
47.  
48. @Override
49. protected void onActivityResult(int requestCode, int resultCode, Intent intent){
50.  
51.  
52.     super.onActivityResult(requestCode, resultCode, intent);
53.     if(Build.VERSION.SDK_INT >= 21){
54.         Uri[] results = null;
55.         //Check if response is positive
56.         if(resultCode== Activity.RESULT_OK){
57.             if(requestCode == FCR){
58.                 if(null == mUMA){
59.                     return;
60.                 }
61.                 if(intent == null){
62.                     //camera selected
63.                     //Capture Photo if no image available
64.                     if(mCM != null){
65.                         results = new Uri[]{Uri.parse(mCM)};
66.                     }
67.                 }else{
68.                     //gallery selected
69.                     String dataString = intent.getDataString();
70.                     if(dataString != null){
71.                         results = new Uri[]{Uri.parse(dataString)};
72.                     }
73.                 }
74.             }
75.         }
76.         mUMA.onReceiveValue(results);
77.         mUMA = null;
78.     }else{
79.         if(requestCode == FCR){
80.             if(null == mUM) return;
81.             Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
82.             mUM.onReceiveValue(result);
83.             mUM = null;
84.         }
85.     }
86. }
87.  
88. AlertDialog.Builder builder;
89. String test = "";
90. Button closeButton;
91.  
92. @SuppressLint({"SetJavaScriptEnabled", "WrongViewCast"})
93. @Override
94. protected void onCreate(Bundle savedInstanceState){/*
95.     requestWindowFeature(Window.FEATURE_NO_TITLE);
96.     this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
97.     getSupportActionBar().hide();*/
98.  
99.  
100.     boolean b = uygulamaYukluMu("com.android.camera");
101.     super.onCreate(savedInstanceState);
102.     setContentView(R.layout.activity_ucuncu_ekran);
103.     if(Build.VERSION.SDK_INT >=23 && (ContextCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) != PackageManager.PERMISSION_GRANTED || ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED)) {
104.         ActivityCompat.requestPermissions(Ucuncu_ekran.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, 1);
105.     }
106.  
107.     webView = (WebView) findViewById(R.id.webView2);
108.     assert webView != null;
109.     WebSettings webSettings = webView.getSettings();
110.     webSettings.setJavaScriptEnabled(true);
111.     webSettings.setAllowFileAccess(true);
112.  
113.     if(Build.VERSION.SDK_INT >= 21){
114.         webSettings.setMixedContentMode(0);
115.         webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
116.     }else if(Build.VERSION.SDK_INT >= 19){
117.         webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
118.     }else if(Build.VERSION.SDK_INT < 19){
119.         webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
120.     }
121.     webView.setWebViewClient(new Callback());
122.     webView.loadUrl("https://mywebsite.com/");
123.     webView.setWebChromeClient(new WebChromeClient(){
124.         //For Android 3.0+
125.         public void openFileChooser(ValueCallback<Uri> uploadMsg){
126.             mUM = uploadMsg;
127.             Intent i = new Intent(Intent.ACTION_GET_CONTENT);
128.             i.addCategory(Intent.CATEGORY_OPENABLE);
129.             i.setType("*/*");
130.             Ucuncu_ekran.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FCR);
131.         }
132.         // For Android 3.0+, above method not supported in some android 3+ versions, in such case we use this
133.         public void openFileChooser(ValueCallback uploadMsg, String acceptType){
134.             mUM = uploadMsg;
135.             Intent i = new Intent(Intent.ACTION_GET_CONTENT);
136.             i.addCategory(Intent.CATEGORY_OPENABLE);
137.             i.setType("*/*");
138.             Ucuncu_ekran.this.startActivityForResult(
139.                     Intent.createChooser(i, "File Browser"),
140.                     FCR);
141.         }
142.         //For Android 4.1+
143.         public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
144.             mUM = uploadMsg;
145.             Intent i = new Intent(Intent.ACTION_GET_CONTENT);
146.             i.addCategory(Intent.CATEGORY_OPENABLE);
147.             i.setType("*/*");
148.             Ucuncu_ekran.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), Ucuncu_ekran.FCR);
149.         }
150.         //For Android 5.0+
151.         @SuppressLint("QueryPermissionsNeeded")
152.         public boolean onShowFileChooser(
153.                 WebView webView, ValueCallback<Uri[]> filePathCallback,
154.                 FileChooserParams fileChooserParams){
155.             if(mUMA != null){
156.                 mUMA.onReceiveValue(null);
157.             }
158.             mUMA = filePathCallback;
159.             Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
160.             if(takePictureIntent.resolveActivity(Ucuncu_ekran.this.getPackageManager()) != null){
161.                 File photoFile = null;
162.                 try{
163.                     photoFile = createImageFile();
164.  
165.                     takePictureIntent.putExtra("PhotoPath", mCM);
166.                 }catch(IOException ex){
167.                     Log.e(TAG, "Failed create image", ex);
168.                 }
169.                 if(photoFile != null){
170.                     mCM = "file:" + photoFile.getAbsolutePath();
171.                    takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
172.                 }else{
173.                     takePictureIntent = null;
174.                 }
175.             }
176.             Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
177.             contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
178.             contentSelectionIntent.setType("*/*");
179.             Intent[] intentArray;
180.             if(takePictureIntent != null){
181.                 intentArray = new Intent[]{takePictureIntent};
182.             }else{
183.                 intentArray = new Intent[0];
184.             }
185.  
186.             Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
187.             chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
188.             chooserIntent.putExtra(Intent.EXTRA_TITLE, "Select an action");
189.             chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
190.             startActivityForResult(chooserIntent, FCR);
191.             return true;
192.         }
193.  
194.     });
195. }
196. public class Callback extends WebViewClient{
197.     public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){
198.         Toast.makeText(getApplicationContext(), "Failed loading app!", Toast.LENGTH_SHORT).show();
199.     }
200. }
201.  
202. // Create an image file
203. private File createImageFile() throws IOException{
204.     @SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
205.     String imageFileName = "img_"+timeStamp+"_";
206.     File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
207.     return File.createTempFile(imageFileName,".jpg",storageDir);
208. }
209.  
210. @Override
211. public boolean onKeyDown(int keyCode, @NonNull KeyEvent event){
212.     if(event.getAction() == KeyEvent.ACTION_DOWN){
213.         switch(keyCode){
214.             case KeyEvent.KEYCODE_BACK:
215.                 if(webView.canGoBack()){
216.                     webView.goBack();
217.                 }else{
218.                     finish();
219.                 }
220.                 return true;
221.         }
222.     }
223.     return super.onKeyDown(keyCode, event);
224. }
225.  
226. @Override
227. public void onConfigurationChanged(Configuration newConfig){
228.     super.onConfigurationChanged(newConfig);
229. }
230.  
231. @Override
232. public void onBackPressed() {
233.     if (webView.canGoBack()) {
234.         webView.goBack();
235.     }
236.     else {
237.         AlertDialog.Builder builder = new AlertDialog.Builder(this);
238.         builder.setTitle("Exit app");
239.         builder.setMessage("Are you sure?");
240.         builder.setPositiveButton("No", new DialogInterface.OnClickListener() {
241.             public void onClick(DialogInterface dialog, int id) {
242.             }
243.         });
244.         builder.setNegativeButton("Yes", new DialogInterface.OnClickListener() {
245.             public void onClick(DialogInterface dialog, int id) {
246.                 Ucuncu_ekran.super.onBackPressed();
247.             }
248.         });
249.         builder.show();
250.  
251.         //super.onBackPressed();
252.     }
253. }
254. public boolean InternetKontrol() {
255.     ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
256.     if (manager.getActiveNetworkInfo() != null && manager.getActiveNetworkInfo().isAvailable() && manager.getActiveNetworkInfo().isConnected()) {
257.         return true;
258.     }
259.     else {
260.         return false;
261.     }
262. }
263. }