public class MainActivity extends ActionBarActivity implements View.OnClickListener {

    ImageView bild;
    Button bild_laden;
    int i = 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {

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

        //Beider Mediaplayer deklarieren und mit Lied initialisieren;
        MediaPlayer titelLied1 = MediaPlayer.create(this, R.raw.theme_1);
        MediaPlayer titelLied2 = MediaPlayer.create(this, R.raw.theme_2);
        titelLied1.start();

        titelLied2.setLooping(true);
        //Naechster Lied starten;
        titelLied1.setNextMediaPlayer(titelLied2);
        
        bild = (ImageView) findViewById((R.id.imageView));
        bild_laden = (Button)findViewById(R.id.bild_laden);
        bild_laden.setOnClickListener(this);
    }


    @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);
    }

    @Override
    public void onClick(View v) {
       // Toast.makeText(this, getResources().getDisplayMetrics().toString(), LENGTH_LONG).show();
        if (i == 0) {
            try {
                bild.setImageResource(R.drawable.child);
                bild_laden.setText("nächstes Bild Laden");
                i++;
                return;
            } catch (Exception e) {
                Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
            }
        }

        if ( i == 1) {
            try {
                bild.setImageResource(R.drawable.n0);
                i++;
                return;
            } catch (Exception e) {
                Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
            }
        }

        if (i == 2) {
            try {
                bild.setImageResource(R.drawable.n1);
                i++;
                return;
            } catch (Exception e) {
                Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
            }
        }

        if (i == 3) {
            try {
                bild.setImageResource(R.drawable.n2);
                i++;
                return;
            } catch (Exception e) {
                Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
            }
        }

        if (i == 4) {
            try {
                bild.setImageResource(R.drawable.n3);
                i++;
                return;
            } catch (Exception e) {
                Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
            }
        }

        if (i == 5) {
            try {
                bild.setImageResource(R.drawable.n4);
                i = 0;
                return;
            } catch (Exception e) {
                Toast.makeText(this, e.toString(), Toast.LENGTH_LONG).show();
            }
        }



    }
}