Homework7

homework7/.gitignore

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+/build

homework7/build.gradle

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+apply plugin: 'com.android.application'
+
+android {
+    compileSdkVersion 30
+    buildToolsVersion "30.0.2"
+
+    defaultConfig {
+        applicationId "com.example.homework7"
+        minSdkVersion 21
+        targetSdkVersion 30
+        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:1.2.0'
+    implementation 'androidx.constraintlayout:constraintlayout:2.0.4'
+    implementation 'androidx.recyclerview:recyclerview:1.1.0'
+    testImplementation 'junit:junit:4.12'
+    androidTestImplementation 'androidx.test.ext:junit:1.1.2'
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.3.0'
+    implementation "android.arch.persistence.room:runtime:1.1.1"
+    annotationProcessor "android.arch.persistence.room:compiler:1.1.1"
+
+}

homework7/proguard-rules.pro

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+# 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

homework7/src/androidTest/java/com/example/homework7/ExampleInstrumentedTest.java

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+package com.example.homework7;
+
+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.homework7", appContext.getPackageName());
+    }
+}

homework7/src/main/AndroidManifest.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.example.homework7">
+
+    <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=".AddContact"/>
+        <activity android:name=".EditContact"/>
+        <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>

homework7/src/main/java/com/example/homework7/AddContact.java

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+package com.example.homework7;
+
+import android.content.Intent;
+import android.content.SharedPreferences;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.CompoundButton;
+import android.widget.EditText;
+import android.widget.Switch;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class AddContact extends AppCompatActivity {
+    private String name;
+    private String phone;
+    private Switch switch1;
+    private boolean ifChecked;
+    private AppDatabase db;
+    private int counter;
+    private SharedPreferences sPref;
+
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.contact_add);
+
+        final EditText editText1 = findViewById(R.id.addName);
+        final EditText editText2 = findViewById(R.id.addPhone);
+        db = AppDatabase.getInstance(this);
+
+        switch1=findViewById(R.id.switcher1);
+        switch1.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                if (isChecked == true) {
+                    editText2.setHint(R.string.email);
+                    Toast.makeText(AddContact.this, R.string.modeInputEmail, Toast.LENGTH_SHORT).show();
+                } else if (isChecked== false){
+                    editText2.setHint(R.string.phoneNumber);
+                    Toast.makeText(AddContact.this, R.string.modeInputPhone, Toast.LENGTH_SHORT).show();
+                }
+                ifChecked = isChecked;
+            }
+        });
+
+        findViewById(R.id.buttonAdd).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intentSave = new Intent(AddContact.this, MainActivity.class);
+                name = editText1.getText().toString();
+                phone = editText2.getText().toString();
+                loadCounter();
+                db.contactDao().insert(new Item(counter, name, phone));
+                Toast.makeText(AddContact.this, R.string.addNewContact, Toast.LENGTH_SHORT).show();
+                counter ++;
+                saveCounter(counter);
+                startActivity(intentSave);
+                finish();
+            }
+        });
+    }
+    void saveCounter(int counter) {
+        sPref = getPreferences(MODE_PRIVATE);
+        SharedPreferences.Editor ed = sPref.edit();
+        ed.putInt("COUNTER", counter);
+        ed.apply();
+    }
+
+    public int loadCounter() {
+        sPref = getPreferences(MODE_PRIVATE);
+        this.counter = sPref.getInt("COUNTER", 0);
+        return counter;
+    }
+}

homework7/src/main/java/com/example/homework7/AppDatabase.java

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+package com.example.homework7;
+
+import android.content.Context;
+
+import androidx.room.Database;
+import androidx.room.Room;
+import androidx.room.RoomDatabase;
+
+@Database(entities = {Item.class}, version = 1, exportSchema = false)
+public abstract class AppDatabase extends RoomDatabase {
+    private static AppDatabase database;
+
+    public abstract ContactDao contactDao();
+
+    public synchronized static AppDatabase getInstance(Context context) {
+        if (database == null) {
+            database = Room.databaseBuilder(context.getApplicationContext(),
+                    AppDatabase.class, "database")
+                    .allowMainThreadQueries()
+                    .fallbackToDestructiveMigration()
+                    .build();
+        }
+        return database;
+
+    }
+}

homework7/src/main/java/com/example/homework7/ContactDao.java

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+package com.example.homework7;
+
+import androidx.room.Dao;
+import androidx.room.Delete;
+import androidx.room.Insert;
+import androidx.room.Query;
+import androidx.room.Update;
+
+import java.util.List;
+
+@Dao
+public interface ContactDao {
+
+    @Query("SELECT * FROM item")
+    List<Item> getAll();
+
+    @Query("SELECT * FROM item WHERE id = :id")
+    Item getById(long id);
+
+    @Insert
+    void insert(Item item);
+
+    @Update
+    void update(Item item);
+
+    @Delete
+    void delete(Item item);
+}

homework7/src/main/java/com/example/homework7/EditContact.java

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+package com.example.homework7;
+
+import android.content.Intent;
+import android.os.Bundle;
+import android.view.View;
+import android.widget.CompoundButton;
+import android.widget.EditText;
+import android.widget.Switch;
+import android.widget.Toast;
+
+import androidx.appcompat.app.AppCompatActivity;
+
+public class EditContact extends AppCompatActivity {
+    private Switch switch2;
+    private boolean ifChecked;
+    private String name;
+    private String data;
+    private int position;
+    private AppDatabase db;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+        setContentView(R.layout.activity_edit_contact);
+
+        final EditText editName = findViewById(R.id.editName);
+        final EditText editData = findViewById(R.id.editPhone);
+        Intent intentPosition = getIntent();
+        position = intentPosition.getIntExtra("POSITION", 0);
+        name = intentPosition.getStringExtra("NAME");
+        data = intentPosition.getStringExtra("DATA");
+        editName.setHint(name);
+        editData.setHint(data);
+        db = AppDatabase.getInstance(this);
+
+        switch2 = findViewById(R.id.switcher2);
+        switch2.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
+
+            @Override
+            public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
+                if (isChecked == true) {
+                    editData.setHint(R.string.email);
+                    Toast.makeText(EditContact.this, R.string.modeInputEmail, Toast.LENGTH_SHORT).show();
+                } else if (isChecked == false) {
+                    editData.setHint(R.string.phoneNumber);
+                    Toast.makeText(EditContact.this, R.string.modeInputPhone, Toast.LENGTH_SHORT).show();
+                }
+                ifChecked = isChecked;
+            }
+        });
+
+        findViewById(R.id.buttonSave).setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                Intent intentSaved = new Intent(EditContact.this, MainActivity.class);
+                name = editName.getText().toString();
+                data = editData.getText().toString();
+                db.contactDao().update(new Item(position, name, data));
+                Toast.makeText(EditContact.this, R.string.editContact, Toast.LENGTH_SHORT).show();
+                startActivity(intentSaved);
+                finish();
+            }
+        });
+    }
+}

homework7/src/main/java/com/example/homework7/Item.java

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+package com.example.homework7;
+
+import androidx.room.Entity;
+import androidx.room.PrimaryKey;
+
+@Entity
+public class Item {
+    @PrimaryKey
+    public int id;
+    private String name;
+    private String data;
+
+    public String getName() {
+        return name;
+    }
+
+    public String getData() {
+        return data;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public Item(int id, String name, String data) {
+        this.id = id;
+        this.name = name;
+        this.data = data;
+    }
+}