merubah background alv

package com.alv.app.tugas_2;

import android.graphics.Color;
import android.os.Bundle;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.view.View;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.Button;
import android.widget.LinearLayout;
import android.widget.TextView;

public class MainActivity extends AppCompatActivity implements View.OnClickListener {

//JANGAN LUPA UNTUK MENDEKLARASIKAN VARIABEL YANG INGIN DIPAKAI
Button btnRed,btnBlue,btnGreen,btnCyan,btnMagenta,btnYellow;
LinearLayout backgroundLayout;
TextView Tred,Tgreen,Tblue;

@Override
protected void onCreate(Bundle savedInstanceState) {
//PROSEDUR INI DIBUAT UNTUK MEMANGGIL FUNGSI,PROSEDUR,DLL YANG TELAH ANDA BUAT

super.onCreate(savedInstanceState);
setContentView(R.layout.tugas_2);

initialize();
}
private void initialize() { //FUNGSI INI DIBUAT AGAR DAPAT DIPANGGIL SAAT ANDROID DIBUKA

//AGAR VARIABEL DAPAT DIPAKAI KITA PERLU ASSIGN ID DALAM LAYOUT KE VARIABEL DALAM JAVA
btnRed = (Button) findViewById(R.id.red);
btnGreen = (Button) findViewById(R.id.green);
btnBlue = (Button) findViewById(R.id.blue);
btnCyan = (Button) findViewById(R.id.cyan);
btnMagenta = (Button) findViewById(R.id.magenta);
btnYellow = (Button) findViewById(R.id.yellow);
backgroundLayout = (LinearLayout) findViewById(R.id.background);
btnRed.setOnClickListener(this);
btnGreen.setOnClickListener(this);
btnBlue.setOnClickListener(this);
btnCyan.setOnClickListener(this);
btnMagenta.setOnClickListener(this);
btnYellow.setOnClickListener(this);
}

@Override
public void onClick(View v) {

//CODINGAN UNTUK MELIHAT BUTTON MANA YANG DI KLIK
switch(v.getId()){
case R.id.red: //MASUKKAN TIAP BUTTON DALAM CASE
backgroundLayout.setBackgroundColor(Color.parseColor("#ff0000"));
break;
case R.id.green:
backgroundLayout.setBackgroundColor(Color.parseColor("#00ff00"));
break;
case R.id.blue:
backgroundLayout.setBackgroundColor(Color.parseColor("#0000ff"));
break;
case R.id.cyan:
backgroundLayout.setBackgroundColor(Color.parseColor("#00ffff"));
break;
case R.id.magenta:
backgroundLayout.setBackgroundColor(Color.parseColor("#ff00ff"));
break;
case R.id.yellow:
backgroundLayout.setBackgroundColor(Color.parseColor("#ffff00"));
break;
}
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();

//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}

return super.onOptionsItemSelected(item);
}
}