package com.app.cameratest_java;
import android.Manifest;
import android.app.Activity;
import android.app.AlertDialog;
import android.content.pm.PackageManager;
import android.os.Build;
import android.os.Bundle;
import android.util.Log;
import android.webkit.PermissionRequest;
import android.webkit.WebChromeClient;
import android.webkit.WebSettings;
import android.webkit.WebView;
import android.webkit.WebViewClient;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.app.ActivityCompat;
import androidx.core.content.ContextCompat;
import java.util.ArrayList;
import java.util.List;
import android.content.Context;
import android.content.DialogInterface;
import android.content.Intent;
import android.content.SharedPreferences;
import android.net.Uri;
import android.provider.Settings;
public class MainActivity extends AppCompatActivity {
private WebView webView;
private static final String TAG;
static {
TAG = "MainActivity";
}
public static final int MY_PERMISSIONS_REQUEST_CAMERA = 100;
public static final String ALLOW_KEY = "ALLOWED";
public static final String CAMERA_PREF = "camera_pref";
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
if (ContextCompat.checkSelfPermission(this, Manifest.permission.CAMERA) != PackageManager.PERMISSION_GRANTED) {
if (getFromPref(this, ALLOW_KEY)) {
showSettingsAlert();
} else if (ContextCompat.checkSelfPermission(this,
Manifest.permission.CAMERA)
!= PackageManager.PERMISSION_GRANTED) {
// Should we show an explanation?
if (ActivityCompat.shouldShowRequestPermissionRationale(this,
Manifest.permission.CAMERA)) {
showAlert();
} else {
// No explanation needed, we can request the permission.
ActivityCompat.requestPermissions(this,
new String[]{Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST_CAMERA);
}
}
} else {
openCamera();
}
webView = (WebView) findViewById(R.id.webview);
webView.setWebViewClient(new WebViewClient());
webView.loadUrl("
https://yadayada_html?appid=e780e85949a2499a9acd3236a756344e");
WebSettings webSettings = webView.getSettings();
webSettings.setJavaScriptEnabled(true);
webView.setWebChromeClient(new WebChromeClient() {
@Override
public void onPermissionRequest(PermissionRequest request) {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
request.grant(request.getResources());
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
int hasCameraPermission = checkSelfPermission(Manifest.permission.CAMERA);
Log.d(TAG, "has camera permission: " + hasCameraPermission);
int hasRecordPermission = checkSelfPermission(Manifest.permission.RECORD_AUDIO);
Log.d(TAG, "has record permission: " + hasRecordPermission);
int hasAudioPermission = checkSelfPermission(Manifest.permission.MODIFY_AUDIO_SETTINGS);
Log.d(TAG, "has audio permission: " + hasAudioPermission);
List<String> permissions = new ArrayList<>();
if (hasCameraPermission != PackageManager.PERMISSION_GRANTED) {
permissions.add(Manifest.permission.CAMERA);
}
if (!permissions.isEmpty()) {
requestPermissions(permissions.toArray(new String[permissions.size()]),111);
}
}
}
}
});
}
public static void saveToPreferences(Context context, String key, Boolean allowed) {
SharedPreferences myPrefs = context.getSharedPreferences(CAMERA_PREF,
Context.MODE_PRIVATE);
SharedPreferences.Editor prefsEditor = myPrefs.edit();
prefsEditor.putBoolean(key, allowed);
prefsEditor.commit();
}
public static Boolean getFromPref(Context context, String key) {
SharedPreferences myPrefs = context.getSharedPreferences(CAMERA_PREF,
Context.MODE_PRIVATE);
return (myPrefs.getBoolean(key, false));
}
private void showAlert() {
AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("App needs to access the Camera.");
alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "DONT ALLOW",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
finish();
}
});
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "ALLOW",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
ActivityCompat.requestPermissions(MainActivity.this,
new String[]{Manifest.permission.CAMERA},
MY_PERMISSIONS_REQUEST_CAMERA);
}
});
alertDialog.show();
}
private void showSettingsAlert() {
AlertDialog alertDialog = new AlertDialog.Builder(MainActivity.this).create();
alertDialog.setTitle("Alert");
alertDialog.setMessage("App needs to access the Camera.");
alertDialog.setButton(AlertDialog.BUTTON_NEGATIVE, "DONT ALLOW",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
//finish();
}
});
alertDialog.setButton(AlertDialog.BUTTON_POSITIVE, "SETTINGS",
new DialogInterface.OnClickListener() {
public void onClick(DialogInterface dialog, int which) {
dialog.dismiss();
startInstalledAppDetailsActivity(MainActivity.this);
}
});
alertDialog.show();
}
@Override
public void onRequestPermissionsResult(int requestCode, String permissions[], int[] grantResults) {
switch (requestCode) {
case MY_PERMISSIONS_REQUEST_CAMERA: {
for (int i = 0, len = permissions.length; i < len; i++) {
String permission = permissions
;
if (grantResults == PackageManager.PERMISSION_DENIED) {
boolean
showRationale =
ActivityCompat.shouldShowRequestPermissionRationale(
this, permission);
if (showRationale) {
showAlert();
} else if (!showRationale) {
// user denied flagging NEVER ASK AGAIN
// you can either enable some fall back,
// disable features of your app
// or open another dialog explaining
// again the permission and directing to
// the app setting
saveToPreferences(MainActivity.this, ALLOW_KEY, true);
}
}
}
}
// other 'case' lines to check for other
// permissions this app might request
}
}
@Override
protected void onResume() {
super.onResume();
}
public static void startInstalledAppDetailsActivity(final Activity context) {
if (context == null) {
return;
}
final Intent i = new Intent();
i.setAction(Settings.ACTION_APPLICATION_DETAILS_SETTINGS);
i.addCategory(Intent.CATEGORY_DEFAULT);
i.setData(Uri.parse("package:" + context.getPackageName()));
i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
i.addFlags(Intent.FLAG_ACTIVITY_NO_HISTORY);
i.addFlags(Intent.FLAG_ACTIVITY_EXCLUDE_FROM_RECENTS);
context.startActivity(i);
}
private void openCamera() {
Intent intent = new Intent("android.media.action.IMAGE_CAPTURE");
startActivity(intent);
}
@Override
public void onBackPressed(){
if (webView.canGoBack()) {
webView.goBack();
} else {
super.onBackPressed();
}
}
}
. 
