First Commit

.gitignore

@@ -0,0 +1,14 @@
+*.iml
+.gradle
+/local.properties
+/.idea/caches
+/.idea/libraries
+/.idea/modules.xml
+/.idea/workspace.xml
+/.idea/navEditor.xml
+/.idea/assetWizardSettings.xml
+.DS_Store
+/build
+/captures
+.externalNativeBuild
+.cxx

app/.gitignore

@@ -0,0 +1 @@
+/build

app/build.gradle

@@ -0,0 +1,29 @@
+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 28
+    buildToolsVersion "29.0.2"
+    defaultConfig {
+        applicationId "com.example.crudapp"
+        minSdkVersion 15
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+    }
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android-optimize.txt'), 'proguard-rules.pro'
+        }
+    }
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation 'androidx.appcompat:appcompat:1.0.2'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
+}

app/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

app/src/androidTest/java/com/example/crudapp/ExampleInstrumentedTest.java

@@ -0,0 +1,27 @@
+package com.example.crudapp;
+
+import android.content.Context;
+
+import androidx.test.platform.app.InstrumentationRegistry;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static org.junit.Assert.*;
+
+/**
+ * Instrumented test, which will execute on an Android device.
+ *
+ * @see <a href="http://d.android.com/tools/testing">Testing documentation</a>
+ */
+@RunWith(AndroidJUnit4.class)
+public class ExampleInstrumentedTest {
+    @Test
+    public void useAppContext() {
+        // Context of the app under test.
+        Context appContext = InstrumentationRegistry.getInstrumentation().getTargetContext();
+
+        assertEquals("com.example.crudapp", appContext.getPackageName());
+    }
+}

app/src/main/AndroidManifest.xml

@@ -0,0 +1,21 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.crudapp">
+
+    <application
+        android:allowBackup="true"
+        android:icon="@mipmap/ic_launcher"
+        android:label="@string/app_name"
+        android:roundIcon="@mipmap/ic_launcher_round"
+        android:supportsRtl="true"
+        android:theme="@style/AppTheme">
+        <activity android:name=".MainActivity">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN" />
+
+                <category android:name="android.intent.category.LAUNCHER" />
+            </intent-filter>
+        </activity>
+    </application>
+
+</manifest>

app/src/main/java/com/example/crudapp/DatabaseHelper.java

@@ -0,0 +1,69 @@
+package com.example.crudapp;
+
+import android.content.ContentValues;
+import android.content.Context;
+import android.database.Cursor;
+import android.database.sqlite.SQLiteDatabase;
+import android.database.sqlite.SQLiteOpenHelper;
+
+/**
+ * Created by ProgrammingKnowledge on 4/3/2015.
+ */
+public class DatabaseHelper extends SQLiteOpenHelper {
+    public static final String DATABASE_NAME = "Student.db";
+    public static final String TABLE_NAME = "student_table";
+    public static final String COL_1 = "ID";
+    public static final String COL_2 = "NAME";
+    public static final String COL_3 = "SURNAME";
+    public static final String COL_4 = "MARKS";
+
+    public DatabaseHelper(Context context) {
+        super(context, DATABASE_NAME, null, 1);
+    }
+
+    @Override
+    public void onCreate(SQLiteDatabase db) {
+        db.execSQL("create table " + TABLE_NAME +" (ID INTEGER PRIMARY KEY AUTOINCREMENT,NAME TEXT,SURNAME TEXT,MARKS INTEGER)");
+    }
+
+    @Override
+    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
+        db.execSQL("DROP TABLE IF EXISTS "+TABLE_NAME);
+        onCreate(db);
+    }
+
+    public boolean insertData(String name,String surname,String marks) {
+        SQLiteDatabase db = this.getWritableDatabase();
+        ContentValues contentValues = new ContentValues();
+        contentValues.put(COL_2,name);
+        contentValues.put(COL_3,surname);
+        contentValues.put(COL_4,marks);
+        long result = db.insert(TABLE_NAME,null ,contentValues);
+        if(result == -1)
+            return false;
+        else
+            return true;
+    }
+
+    public Cursor getAllData() {
+        SQLiteDatabase db = this.getWritableDatabase();
+        Cursor res = db.rawQuery("select * from "+TABLE_NAME,null);
+        return res;
+    }
+
+    public boolean updateData(String id,String name,String surname,String marks) {
+        SQLiteDatabase db = this.getWritableDatabase();
+        ContentValues contentValues = new ContentValues();
+        contentValues.put(COL_1,id);
+        contentValues.put(COL_2,name);
+        contentValues.put(COL_3,surname);
+        contentValues.put(COL_4,marks);
+        db.update(TABLE_NAME, contentValues, "ID = ?",new String[] { id });
+        return true;
+    }
+
+    public Integer deleteData (String id) {
+        SQLiteDatabase db = this.getWritableDatabase();
+        return db.delete(TABLE_NAME, "ID = ?",new String[] {id});
+    }
+}