Membuat Aplikasi Pesan Chat di Android Studio Bagian 1

https://codingrakitan.blogspot.com/2021/03/membuat-aplikasi-pesan-chat-di-android.html

 

Aplikasi pesan merupakan salah satu aplikasi wajib di install di perangkat Smartphone Android. Banyak aplikasi pesan chat yang dapat ditemukan di playstore, beberapa aplikasi yang terkenal seperti WhatsApp, Line, Telegram, KakaoTalk, dan masih banyak lagi.

Pada postingan kali ini kita akan membuat aplikasi pesan chat sama seperti WhatsApp ataupun Telegram. Agar mudah untuk dipahami, pembuatan aplikasi ini akan dibagi menjadi beberapa bagian dimana pada bagian pertama ini berfokus pada tampilan aplikasi.

Tampilan aplikasi pada bagian pertama nantinya akan tampak seperti gambar dibawah :

Langsung saja ikuti langkah-langkah berikut :

1. Buat Project baru dengan nama Pesan Kilat
2. Buat beberapa class dan folder seperti pada gambar.

Bisa di lihat pada gambar diatas terdapat 2 class activity yaitu MainActivity, dan TampilPesan, serta terdapat satu class fragment yang berada dalam package fregment dengan nama FragmentChat. Berikut kode dari ketiga class tersebut :

MainActivity

package com.codingrakitan.pesankilat;

import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.FragmentManager;
import androidx.fragment.app.FragmentTransaction;

import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.Window;

import com.codingrakitan.pesankilat.fragment.FragmentChat;

public class MainActivity extends AppCompatActivity {

    private FragmentTransaction ft;
    private FragmentManager fm;
    private FragmentChat fragmentChat;
    private AppCompatActivity activity;
    private Context context;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getSupportActionBar().hide();
        setContentView(R.layout.activity_main);

        context=this;
        activity = this;

        fm = getSupportFragmentManager();
        ft = fm.beginTransaction();

        BuatFragment();
    }

    private void BuatFragment() {
        fragmentChat = new FragmentChat(activity, context);

        ft.add(R.id.konten, fragmentChat);
        ft.commit();
    }

    public void TampilPesan() {
        Intent i = new Intent(MainActivity.this, TampilPesan.class);
        startActivity(i);
        onPause();
    }
}

TampilPesan

package com.codingrakitan.pesankilat;

import androidx.appcompat.app.AppCompatActivity;

import android.content.Context;
import android.os.Bundle;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.widget.EditText;
import android.widget.LinearLayout;
import android.widget.TextView;

public class TampilPesan extends AppCompatActivity {

    private LinearLayout pesan;
    private Context context;
    private LinearLayout send;
    private EditText text;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getSupportActionBar().hide();
        setContentView(R.layout.activity_tampil_pesan);

        context = this;
        pesan = findViewById(R.id.pesan);
        send = findViewById(R.id.send);
        text = findViewById(R.id.editText);

        send.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String s = text.getText().toString();
                CardMyPesan(s);
            }
        });

        Kontent();
    }

    private void CardMyPesan(String s) {
        View v = getLayoutInflater().inflate(R.layout.card_pesan_b, null);
        LinearLayout konten_pesan = v.findViewById(R.id.konten_pesan);
        TextView textView = new TextView(context);
        ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        textView.setLayoutParams(lp);

        textView.setText(""+s);
        textView.setTextSize(14);
        textView.setTextColor(getResources().getColor(R.color.hitam));
        konten_pesan.addView(textView);

        pesan.addView(v);
        text.setText("");

    }

    private void Kontent() {
        View v = getLayoutInflater().inflate(R.layout.card_pesan_a, null);
        LinearLayout konten_pesan = v.findViewById(R.id.konten_pesan);
        TextView textView = new TextView(context);
        ViewGroup.LayoutParams lp = new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT);
        textView.setLayoutParams(lp);

        textView.setText("selamat datang !");
        textView.setTextSize(14);
        textView.setTextColor(getResources().getColor(R.color.hitam));
        konten_pesan.addView(textView);

        pesan.addView(v);
    }
}

FragmentChat

package com.codingrakitan.pesankilat.fragment;

import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Build;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.LinearLayout;

import androidx.annotation.RequiresApi;
import androidx.appcompat.app.AppCompatActivity;
import androidx.fragment.app.Fragment;

import com.codingrakitan.pesankilat.MainActivity;
import com.codingrakitan.pesankilat.R;


@SuppressLint("ValidFragment")
public class FragmentChat extends Fragment {

    private AppCompatActivity activity;
    private Context context;
    private LinearLayout isi;
    private LayoutInflater inf;

    public FragmentChat(AppCompatActivity activity, Context context) {
        this.context = context;
        this.activity = activity;
    }

    @RequiresApi(api = Build.VERSION_CODES.M)
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState)
    {
        View view = inflater.inflate(R.layout.fragment_chat, container, false);
        isi = view.findViewById(R.id.isi);
        inf = inflater;
        for (int i=0;i<10;i++){
            BuatCard();
        }
        return view;
    }

    private void BuatCard() {
        View v = inf.inflate(R.layout.card_chat, null);
        isi.addView(v);
        v.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                ((MainActivity) getActivity()).TampilPesan();
            }
        });
    }
}

Catatan : Jangan lupa untuk mengganti "package com.codingrakitan.pesankilat;" yang berada pada baris atas sesuai dengan package kalian.

3. Masukkan 2 drawabel baru dengan nama "ic_arrow_back_black.xml" dan "ic_send_black.xml".

Gambar drawable ini bisa anda buat sendiri ataupun menggunakan asset yang telah disediakan AndroidStudio. Baca Cara Menggunakan Icon Vector Asset bawahan Android Studio, Cara Menggunakan Icon Sendiri di Android Studio.

4. Buka colors.xml yang berada pada res -> values -> colors.xml, kemudian isi dengan kode berikut :

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <color name="colorPrimary">#008577</color>
    <color name="colorPrimaryDark">#00574B</color>
    <color name="colorAccent">#D81B60</color>
    <color name="biru">#0073A0</color>
    <color name="abu_abu">#8A8A8A</color>
    <color name="hijau">#00D423</color>
    <color name="abu_abu_dua">#E3E3E3</color>
    <color name="hitam">#000000</color>
    <color name="putih">#FFFFFF</color>
    <color name="hijau_pesan">#e2ffc7</color>
    <color name="waktu">#869b72</color>

</resources>

5. Buat layout seperti pada gambar dibawah :

Adapun kode dari layout-layout tersebut :

activity_main.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity" >

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:background="@color/biru"
            android:gravity="center_vertical"
            android:orientation="vertical"
            android:padding="20dp">

            <TextView
                android:id="@+id/textView"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="PesanKilat"
                android:textColor="@android:color/white"
                android:textSize="24sp"
                android:textStyle="bold" />
        </LinearLayout>

        <LinearLayout
            android:id="@+id/konten"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"></LinearLayout>

    </LinearLayout>

</RelativeLayout>

activity_tampil_pesan.xml

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="@color/abu_abu_dua"
    android:orientation="vertical"
    tools:context=".TampilPesan">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:orientation="vertical">

        <ScrollView
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:layout_weight="1"
            android:scrollbars="none">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:orientation="vertical">

                <LinearLayout
                    android:id="@+id/pesan"
                    android:layout_width="match_parent"
                    android:layout_height="fill_parent"
                    android:layout_weight="1"
                    android:orientation="vertical"
                    android:paddingTop="50dp"></LinearLayout>
            </LinearLayout>
        </ScrollView>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="horizontal">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="match_parent"
                    android:layout_marginLeft="5dp"
                    android:layout_marginRight="5dp"
                    android:layout_marginBottom="5dp"
                    android:layout_weight="1"
                    android:background="@android:color/white"
                    android:gravity="center_vertical"
                    android:orientation="vertical"
                    android:padding="10dp">

                    <EditText
                        android:id="@+id/editText"
                        android:layout_width="match_parent"
                        android:layout_height="wrap_content"
                        android:background="@android:color/transparent"
                        android:ems="10"
                        android:hint="Tulis pesan"
                        android:inputType="textPersonName"
                        android:textSize="14sp" />
                </LinearLayout>

                <LinearLayout
                    android:id="@+id/send"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginRight="5dp"
                    android:layout_marginBottom="5dp"
                    android:background="@color/biru"
                    android:orientation="vertical"
                    android:padding="20dp">

                    <ImageView
                        android:id="@+id/imageView4"
                        android:layout_width="20dp"
                        android:layout_height="20dp"
                        android:adjustViewBounds="true"
                        android:tint="@android:color/white"
                        app:srcCompat="@drawable/ic_send_black"
                        tools:ignore="VectorDrawableCompat" />
                </LinearLayout>
            </LinearLayout>
        </LinearLayout>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:background="@color/biru"
        android:gravity="center_vertical"
        android:orientation="horizontal"
        android:paddingLeft="20dp"
        android:paddingRight="20dp">

        <ImageView
            android:id="@+id/imageView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:adjustViewBounds="true"
            android:tint="@android:color/white"
            app:srcCompat="@drawable/ic_arrow_back_black"
            tools:ignore="VectorDrawableCompat" />

        <ImageView
            android:id="@+id/imageView3"
            android:layout_width="30dp"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:adjustViewBounds="true"
            app:srcCompat="@mipmap/ic_launcher_round" />

        <TextView
            android:id="@+id/textView6"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="5dp"
            android:text="Nama Kontak"
            android:textColor="@android:color/white"
            android:textStyle="bold" />
    </LinearLayout>

</RelativeLayout>

card_chat.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="20dp">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="10dp"
        android:orientation="horizontal">

        <ImageView
            android:id="@+id/imageView"
            android:layout_width="50dp"
            android:layout_height="50dp"
            android:adjustViewBounds="true"
            app:srcCompat="@mipmap/ic_launcher" />

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:layout_marginLeft="10dp"
            android:orientation="vertical">

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_marginBottom="10dp"
                android:orientation="horizontal">

                <LinearLayout
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_weight="1"
                    android:orientation="vertical">

                    <TextView
                        android:id="@+id/textView3"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="5dp"
                        android:text="Nama Kontak"
                        android:textColor="@android:color/black"
                        android:textStyle="bold" />

                    <TextView
                        android:id="@+id/textView2"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="TextView" />
                </LinearLayout>

                <LinearLayout
                    android:layout_width="wrap_content"
                    android:layout_height="match_parent"
                    android:gravity="center_horizontal"
                    android:orientation="vertical">

                    <TextView
                        android:id="@+id/textView5"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginBottom="10dp"
                        android:text="15:00"
                        android:textColor="@color/hijau"
                        android:textSize="10sp"
                        app:fontFamily="serif" />

                    <TextView
                        android:id="@+id/textView4"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:background="@color/hijau"
                        android:paddingLeft="10dp"
                        android:paddingRight="10dp"
                        android:text="9"
                        android:textColor="@android:color/white" />
                </LinearLayout>
            </LinearLayout>

        </LinearLayout>

    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="0.5dp"
        android:layout_marginLeft="60dp"
        android:background="@color/abu_abu"
        android:orientation="vertical"></LinearLayout>
</LinearLayout>

card_pesan_a.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:orientation="vertical"
    android:padding="10dp">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginRight="30dp"
        android:background="@android:color/white"
        android:minWidth="70dp"
        android:minHeight="30dp"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="10dp"
            android:visibility="gone">

            <TextView
                android:id="@+id/textView8"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="0852512161"
                android:textColor="@android:color/black"
                android:textSize="12sp" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:minWidth="50dp"
                android:orientation="horizontal"></LinearLayout>

            <TextView
                android:id="@+id/textView7"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Nama kontak"
                android:textSize="10sp" />
        </LinearLayout>

        <LinearLayout
            android:id="@+id/konten_pesan"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:padding="10dp"></LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="right"
            android:orientation="vertical"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:paddingBottom="10dp">

            <TextView
                android:id="@+id/textView9"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="09:00"
                android:textColor="@color/waktu"
                android:textSize="10sp" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

card_pesan_b.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:gravity="right"
    android:orientation="vertical"
    android:padding="10dp">

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginLeft="30dp"
        android:background="@color/hijau_pesan"
        android:minWidth="70dp"
        android:minHeight="30dp"
        android:orientation="vertical">

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="horizontal"
            android:padding="10dp"
            android:visibility="gone">

            <TextView
                android:id="@+id/textView8"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="0852512161"
                android:textColor="@android:color/black"
                android:textSize="12sp" />

            <LinearLayout
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:layout_weight="1"
                android:minWidth="50dp"
                android:orientation="horizontal"></LinearLayout>

            <TextView
                android:id="@+id/textView7"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="Nama kontak"
                android:textSize="10sp" />
        </LinearLayout>

        <LinearLayout
            android:id="@+id/konten_pesan"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:orientation="vertical"
            android:padding="10dp"></LinearLayout>

        <LinearLayout
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            android:gravity="right"
            android:orientation="vertical"
            android:paddingLeft="10dp"
            android:paddingRight="10dp"
            android:paddingBottom="10dp">

            <TextView
                android:id="@+id/textView9"
                android:layout_width="wrap_content"
                android:layout_height="wrap_content"
                android:text="09:00"
                android:textColor="@color/waktu"
                android:textSize="10sp" />
        </LinearLayout>
    </LinearLayout>
</LinearLayout>

fragment_chat.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical" android:layout_width="match_parent"
    android:layout_height="match_parent">

    <ScrollView
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scrollbars="none">

        <LinearLayout
            android:id="@+id/isi"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:orientation="vertical" />
    </ScrollView>
</LinearLayout>

6. Terakhir buka AndroidManifest.xml dan tambahkan android:windowSoftInputMode="adjustResize" pada activity "TampilPesan" sehingga menjadi seperti berikut :

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.codingrakitan.pesankilat">

    <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=".TampilPesan"
            android:windowSoftInputMode="adjustResize"></activity>
        <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>

Jika kalian mengkopi paste kode di atas, silahkan sesuaikan package="com.codingrakitan.pesankilat" dengan nama package kalian. 

Catatan : Kode android:windowSoftInputMode="adjustResize" berfungsi untuk menyesuaikan tampilan ketika keyboard muncul.

Lanjut ke Membuat Aplikasi Pesan Chat di Android Studio Bagian 2

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