Added login from firebase db

app/build.gradle

@@ -4,11 +4,12 @@ android {
     compileSdkVersion 28
     defaultConfig {
         applicationId "com.example.infiniteLoop.parkingo"
-        minSdkVersion 20
+        minSdkVersion 21
         targetSdkVersion 26
         versionCode 1
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+        multiDexEnabled true
     }
     buildTypes {
         release {
@@ -30,10 +31,15 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.1'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
     implementation 'androidx.cardview:cardview:1.0.0'
+    implementation 'com.android.support:multidex:1.0.3'
     implementation 'de.hdodenhof:circleimageview:2.2.0'
-    implementation 'com.google.firebase:firebase-analytics:17.2.0'
+    //implementation 'com.google.firebase:firebase-analytics:17.2.0'
     //implementation 'com.google.firebase:firebase-core:16.0.9'
-    implementation 'com.google.firebase:firebase-storage:19.1.0'
+    //implementation 'com.google.firebase:firebase-storage:19.1.0'
+    implementation 'com.github.ybq:Android-SpinKit:1.4.0'
+
+
+    implementation 'com.google.firebase:firebase-firestore:21.2.1'
 
 
 }

app/src/main/java/com/example/infiniteLoop/parkingo/checkin.java

@@ -2,22 +2,12 @@ package com.example.infiniteLoop.parkingo;
 
 import android.app.Activity;
 import android.content.Intent;
-import android.net.Uri;
 import android.os.Bundle;
 import android.util.Log;
 import android.view.View;
 import android.widget.EditText;
 import android.widget.Toast;
 
-import androidx.annotation.NonNull;
-
-import com.google.android.gms.tasks.OnFailureListener;
-import com.google.android.gms.tasks.OnSuccessListener;
-import com.google.firebase.storage.FirebaseStorage;
-import com.google.firebase.storage.StorageReference;
-import com.google.firebase.storage.UploadTask;
-
-import java.io.File;
 
 import static android.content.ContentValues.TAG;
 

app/src/main/java/com/example/infiniteLoop/parkingo/login_activity.java

@@ -2,22 +2,36 @@ package com.example.infiniteLoop.parkingo;
 
 import android.app.Activity;
 import android.app.AlertDialog;
+import android.app.ProgressDialog;
 import android.content.DialogInterface;
 import android.content.Intent;
 import android.os.Bundle;
+import android.util.Log;
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.Toast;
 
+import androidx.annotation.NonNull;
+
+import com.google.android.gms.tasks.OnFailureListener;
+import com.google.android.gms.tasks.OnSuccessListener;
+import com.google.firebase.firestore.DocumentReference;
+import com.google.firebase.firestore.FirebaseFirestore;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static androidx.constraintlayout.widget.Constraints.TAG;
+
 public class login_activity extends Activity {
     EditText username,password;
     Button login_btn;
+    ProgressDialog progress;
     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.login_layout);
-
         username=findViewById(R.id.username);
         password=findViewById(R.id.password);
         login_btn=findViewById(R.id.login_btn);
@@ -38,7 +52,14 @@ public class login_activity extends Activity {
                     login li=new login();
                     li.setPass(uname);
                     li.setUname(pass);
-                    if(so.fetch_login_details(li)){
+                    so.fetch_login_details(li,login_activity.this);
+                    progress = new ProgressDialog(login_activity.this);
+                    progress.setTitle("Loading");
+                    progress.setMessage("Wait while loading...");
+                    progress.setCancelable(false); // disable dismiss by tapping outside of the dialog
+                    progress.show();
+
+                    /*if(so.fetch_login_details(li,login_activity.this)){
                         Toast.makeText(login_activity.this,"Login_Success",Toast.LENGTH_SHORT).show();
                         startActivity(new Intent(login_activity.this,dashboard.class));
                         finish();
@@ -50,13 +71,31 @@ public class login_activity extends Activity {
                         username.setError("Wrong Credentials");
                         password.setText("");
                         username.requestFocus();
-                    }
+                    }*/
                 }
             }
         });
 
     }
 
+    public void loginSuccess() {
+        // To dismiss the dialog
+        progress.dismiss();
+        Toast.makeText(login_activity.this,"Login_Success",Toast.LENGTH_SHORT).show();
+        startActivity(new Intent(login_activity.this,dashboard.class));
+        finish();
+    }
+
+    public void loginFailure() {
+        // To dismiss the dialog
+        progress.dismiss();
+        Toast.makeText(login_activity.this,"failed",Toast.LENGTH_SHORT).show();
+        username.setText("");
+        username.setError("Wrong Credentials");
+        password.setText("");
+        username.requestFocus();
+    }
+
     @Override
     public void onBackPressed() {
         AlertDialog.Builder builder= new AlertDialog.Builder(this);

app/src/main/java/com/example/infiniteLoop/parkingo/sqlite_ops.java

@@ -6,12 +6,24 @@ import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteOpenHelper;
 import android.util.Log;
 
+import androidx.annotation.NonNull;
+
+import com.google.android.gms.tasks.OnCompleteListener;
+import com.google.android.gms.tasks.Task;
+import com.google.firebase.firestore.DocumentReference;
+import com.google.firebase.firestore.DocumentSnapshot;
+import com.google.firebase.firestore.FirebaseFirestore;
+import com.google.firebase.firestore.Query;
+import com.google.firebase.firestore.QueryDocumentSnapshot;
+import com.google.firebase.firestore.QuerySnapshot;
+
 import java.util.ArrayList;
 import java.util.HashMap;
 
 import static android.content.ContentValues.TAG;
 
 public class sqlite_ops extends SQLiteOpenHelper{
+    FirebaseFirestore fdb;
     public static final int DATABASE_VERSION=1;
     public static final String DATABASE_NAME="parkingo.db";
     public sqlite_ops(Context context) {
@@ -36,6 +48,7 @@ public class sqlite_ops extends SQLiteOpenHelper{
                     db.execSQL("insert into slots values(null,'"+slot+"',0,'CAR')");
             }
         }
+
     }
 
     @Override
@@ -50,8 +63,8 @@ public class sqlite_ops extends SQLiteOpenHelper{
     }
 
 
-    public boolean fetch_login_details(login li){
-        SQLiteDatabase db= this.getReadableDatabase();
+    public boolean fetch_login_details(login li,final login_activity la){
+      /*  SQLiteDatabase db= this.getReadableDatabase();
         //Log.d(TAG, "fetch_login_details: "+li.getUname()+" "+li.getPass());
         Cursor cursor = db.query("admin",new String[]{"username","password"},"username"+ "=?",
                 new String[]{li.getUname()}, null, null, null, null);
@@ -80,7 +93,30 @@ public class sqlite_ops extends SQLiteOpenHelper{
             Log.d(TAG, "fetch_login_details: nothing selected");
             db.close();
             return false;
-        }
+        }*/
+        fdb = FirebaseFirestore.getInstance();
+        Query query = fdb.collection("users").whereEqualTo("name",li.getUname())
+                .whereEqualTo("pass",li.getPass());
+        if(query!=null)
+            query.get().addOnCompleteListener(new OnCompleteListener<QuerySnapshot>() {
+            @Override
+            public void onComplete(@NonNull Task<QuerySnapshot> task) {
+                if(task.isSuccessful()) {
+                        QuerySnapshot documentSnapshot = task.getResult();
+                        if(documentSnapshot.isEmpty()) {
+                            la.loginFailure();
+                            Log.d("Login","Failure");
+                        }else {
+                            la.loginSuccess();
+                            Log.d("Login", "Success");
+                        }
+                }else
+                    la.loginFailure();
+                    Log.d("Login","Failure");
+                }
+
+        });
+        return  true;
     }
 
     public boolean check_in(checkin_details cd){

app/src/main/res/values/styles.xml

@@ -17,6 +17,10 @@
     <style name="appTheme.AppBarOverlay" parent="ThemeOverlay.AppCompat.Dark.ActionBar" />
 
     <style name="appTheme.PopupOverlay" parent="ThemeOverlay.AppCompat.Light" />
-
+    @style/SpinKitView
+    @style/SpinKitView.Circle
+    @style/SpinKitView.Large
+    @style/SpinKitView.Small
+    @style/SpinKitView.Small.DoubleBounce
 
 </resources>