package MRT.MRT.MRT0012;

import android.app.Activity;
import android.content.Intent;
import android.media.MediaPlayer;
import android.os.Bundle;
import android.os.Environment;
import android.os.Handler;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.ListView;
import android.widget.Toast;
import java.io.File;
import java.io.IOException;


public class MainActivity extends Activity {
    Handler handler=new Handler();
    MediaPlayer mediaPlayer=new MediaPlayer();
    ListView listView;
    Runnable exit=new Runnable() {
        @Override
        public void run() {
            backdoublepressed=false;
        }
    };
    boolean backdoublepressed=false;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        setContentView(R.layout.activity_main);
        super.onCreate(savedInstanceState);
        listView=findViewById(R.id.list);
        File file=new File(Environment.getExternalStorageDirectory()+"/Musics");
        File[] files=file.listFiles();
        ArrayAdapter<File> adapter=new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,files);
        listView.setAdapter(adapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
                try {
                    mediaPlayer.setDataSource(listView.getItemAtPosition(position).toString());
                    mediaPlayer.prepare();
                } catch (IOException e) {
                    e.printStackTrace();
                    return;
                }
                mediaPlayer.start();
            }
        });

    }

    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.activitymain_menu,menu);
        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public void onBackPressed() {
        if(backdoublepressed){
            MainActivity.this.finish();
        }
        else{
            backdoublepressed=true;
            Toast.makeText(getApplicationContext(),"press back again to exit",Toast.LENGTH_LONG).show();
            handler.postDelayed(exit,3000);
        }
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        switch (item.getItemId()){
            case(R.id.exit):{MainActivity.this.finish();break;}
            case(R.id.setting):{
                Intent intent=new Intent(getApplicationContext(),SettingActivity.class);
                startActivity(intent);
            }
        }
        return super.onOptionsItemSelected(item);
    }

}

   File file=new File(Environment.getExternalStorageDirectory()+"/Musics");
    File[] files=file.listFiles();
    ArrayAdapter<File> adapter=new ArrayAdapter<>(this,android.R.layout.simple_list_item_1,files);
    listView.setAdapter(adapter);