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

[hk1337]

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:

import android.Manifest;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.pm.ApplicationInfo;
import android.content.pm.PackageManager;
import android.content.res.Configuration;
import android.net.ConnectivityManager;
import android.net.Uri;
import android.os.Build;
import android.os.Bundle;
import android.os.Environment;
import android.provider.MediaStore;
import android.util.Log;
import android.view.KeyEvent;
import android.view.View;
import android.webkit.ValueCallback;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import android.widget.Button;
import android.widget.Toast;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;

import java.io.File;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.List;

public class Ucuncu_ekran extends AppCompatActivity{
WebView webView;
private static final String TAG = Ucuncu_ekran.class.getSimpleName();
private String mCM;
private ValueCallback mUM;
private ValueCallback<Uri[]> mUMA;
private final static int FCR=1;


@Override
protected void onActivityResult(int requestCode, int resultCode, Intent intent){


    super.onActivityResult(requestCode, resultCode, intent);
    if(Build.VERSION.SDK_INT >= 21){
        Uri[] results = null;
        //Check if response is positive
        if(resultCode== Activity.RESULT_OK){
            if(requestCode == FCR){
                if(null == mUMA){
                    return;
                }
                if(intent == null){
                    //camera selected
                    //Capture Photo if no image available
                    if(mCM != null){
                        results = new Uri[]{Uri.parse(mCM)};
                    }
                }else{
                    //gallery selected
                    String dataString = intent.getDataString();
                    if(dataString != null){
                        results = new Uri[]{Uri.parse(dataString)};
                    }
                }
            }
        }
        mUMA.onReceiveValue(results);
        mUMA = null;
    }else{
        if(requestCode == FCR){
            if(null == mUM) return;
            Uri result = intent == null || resultCode != RESULT_OK ? null : intent.getData();
            mUM.onReceiveValue(result);
            mUM = null;
        }
    }
}

AlertDialog.Builder builder;
String test = "";
Button closeButton;

@SuppressLint({"SetJavaScriptEnabled", "WrongViewCast"})
@Override
protected void onCreate(Bundle savedInstanceState){/*
    requestWindowFeature(Window.FEATURE_NO_TITLE);
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,WindowManager.LayoutParams.FLAG_FULLSCREEN);
    getSupportActionBar().hide();*/


    boolean b = uygulamaYukluMu("com.android.camera");
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_ucuncu_ekran);
    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)) {
        ActivityCompat.requestPermissions(Ucuncu_ekran.this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE, Manifest.permission.CAMERA}, 1);
    }

    webView = (WebView) findViewById(R.id.webView2);
    assert webView != null;
    WebSettings webSettings = webView.getSettings();
    webSettings.setJavaScriptEnabled(true);
    webSettings.setAllowFileAccess(true);

    if(Build.VERSION.SDK_INT >= 21){
        webSettings.setMixedContentMode(0);
        webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
    }else if(Build.VERSION.SDK_INT >= 19){
        webView.setLayerType(View.LAYER_TYPE_HARDWARE, null);
    }else if(Build.VERSION.SDK_INT < 19){
        webView.setLayerType(View.LAYER_TYPE_SOFTWARE, null);
    }
    webView.setWebViewClient(new Callback());
    webView.loadUrl("https://mywebsite.com/");
    webView.setWebChromeClient(new WebChromeClient(){
        //For Android 3.0+
        public void openFileChooser(ValueCallback<Uri> uploadMsg){
            mUM = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("*/*");
            Ucuncu_ekran.this.startActivityForResult(Intent.createChooser(i,"File Chooser"), FCR);
        }
        // For Android 3.0+, above method not supported in some android 3+ versions, in such case we use this
        public void openFileChooser(ValueCallback uploadMsg, String acceptType){
            mUM = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("*/*");
            Ucuncu_ekran.this.startActivityForResult(
                    Intent.createChooser(i, "File Browser"),
                    FCR);
        }
        //For Android 4.1+
        public void openFileChooser(ValueCallback<Uri> uploadMsg, String acceptType, String capture){
            mUM = uploadMsg;
            Intent i = new Intent(Intent.ACTION_GET_CONTENT);
            i.addCategory(Intent.CATEGORY_OPENABLE);
            i.setType("*/*");
            Ucuncu_ekran.this.startActivityForResult(Intent.createChooser(i, "File Chooser"), Ucuncu_ekran.FCR);
        }
        //For Android 5.0+
        @SuppressLint("QueryPermissionsNeeded")
        public boolean onShowFileChooser(
                WebView webView, ValueCallback<Uri[]> filePathCallback,
                FileChooserParams fileChooserParams){
            if(mUMA != null){
                mUMA.onReceiveValue(null);
            }
            mUMA = filePathCallback;
            Intent takePictureIntent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
            if(takePictureIntent.resolveActivity(Ucuncu_ekran.this.getPackageManager()) != null){
                File photoFile = null;
                try{
                    photoFile = createImageFile();

                    takePictureIntent.putExtra("PhotoPath", mCM);
                }catch(IOException ex){
                    Log.e(TAG, "Failed create image", ex);
                }
                if(photoFile != null){
                    mCM = "file:" + photoFile.getAbsolutePath();
                   takePictureIntent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(photoFile));
                }else{
                    takePictureIntent = null;
                }
            }
            Intent contentSelectionIntent = new Intent(Intent.ACTION_GET_CONTENT);
            contentSelectionIntent.addCategory(Intent.CATEGORY_OPENABLE);
            contentSelectionIntent.setType("*/*");
            Intent[] intentArray;
            if(takePictureIntent != null){
                intentArray = new Intent[]{takePictureIntent};
            }else{
                intentArray = new Intent[0];
            }

            Intent chooserIntent = new Intent(Intent.ACTION_CHOOSER);
            chooserIntent.putExtra(Intent.EXTRA_INTENT, contentSelectionIntent);
            chooserIntent.putExtra(Intent.EXTRA_TITLE, "Select an action");
            chooserIntent.putExtra(Intent.EXTRA_INITIAL_INTENTS, intentArray);
            startActivityForResult(chooserIntent, FCR);
            return true;
        }

    });
}
public class Callback extends WebViewClient{
    public void onReceivedError(WebView view, int errorCode, String description, String failingUrl){
        Toast.makeText(getApplicationContext(), "Failed loading app!", Toast.LENGTH_SHORT).show();
    }
}

// Create an image file
private File createImageFile() throws IOException{
    @SuppressLint("SimpleDateFormat") String timeStamp = new SimpleDateFormat("yyyyMMdd_HHmmss").format(new Date());
    String imageFileName = "img_"+timeStamp+"_";
    File storageDir = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_PICTURES);
    return File.createTempFile(imageFileName,".jpg",storageDir);
}

@Override
public boolean onKeyDown(int keyCode, @NonNull KeyEvent event){
    if(event.getAction() == KeyEvent.ACTION_DOWN){
        switch(keyCode){
            case KeyEvent.KEYCODE_BACK:
                if(webView.canGoBack()){
                    webView.goBack();
                }else{
                    finish();
                }
                return true;
        }
    }
    return super.onKeyDown(keyCode, event);
}

@Override
public void onConfigurationChanged(Configuration newConfig){
    super.onConfigurationChanged(newConfig);
}

@Override
public void onBackPressed() {
    if (webView.canGoBack()) {
        webView.goBack();
    }
    else {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);
        builder.setTitle("Exit app");
        builder.setMessage("Are you sure?");
        builder.setPositiveButton("No", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
            }
        });
        builder.setNegativeButton("Yes", new DialogInterface.OnClickListener() {
            public void onClick(DialogInterface dialog, int id) {
                Ucuncu_ekran.super.onBackPressed();
            }
        });
        builder.show();

        //super.onBackPressed();
    }
}
public boolean InternetKontrol() {
    ConnectivityManager manager = (ConnectivityManager) getSystemService(Context.CONNECTIVITY_SERVICE);
    if (manager.getActiveNetworkInfo() != null && manager.getActiveNetworkInfo().isAvailable() && manager.getActiveNetworkInfo().isConnected()) {
        return true;
    }
    else {
        return false;
    }
}
}