Android - 002 - Seek Bar Change Listener

android.002.java

public class MainActivity extends AppCompatActivity {
    private EditText mein_eingabefeld;
    private Button btnTxtSpeichern;
    private TextView meine_textview;
    private SeekBar seekBar;

    private class myOCL implements View.OnClickListener {
        @Override
        public void onClick(View view) {
            meine_textview.setText(mein_eingabefeld.getText().toString());
            mein_eingabefeld.setText("");
            seekBar.setProgress(13);
        }
    }

    private class MyOSBL implements SeekBar.OnSeekBarChangeListener {
        @Override
        public void onProgressChanged(SeekBar sb, int i, boolean fromUser) {
            //meine_textview.setText(String.valueOf(i));
            meine_textview.setText(String.format("Progress = %d, From User: %s",i, "" + fromUser ));

        }

        @Override
        public void onStartTrackingTouch(SeekBar seekBar) {
            meine_textview.setText("onStartTrackingTouch");
        }

        @Override
        public void onStopTrackingTouch(SeekBar seekBar) {
            meine_textview.setText("onStopTrackingTouch");
        }
    }

    private void init() {
        meine_textview = findViewById(R.id.meine_textview);

        btnTxtSpeichern = (Button)findViewById(R.id.btnTxtSpeichern);
        btnTxtSpeichern.setOnClickListener(new myOCL());

        mein_eingabefeld = findViewById(R.id.mein_eingabefeld);

        seekBar = findViewById(R.id.seekBar);
        seekBar.setOnSeekBarChangeListener(new MyOSBL());

    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        init();
    }
}