Apps [WebView] Uploading pictures from camera and gallery in Android application, need help
- By hk1337
- Android Development
- 0 Replies
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:
My code:
Java:
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;
}
}
}
