使用 setOnSeekBarChangeListener 或 Button 的两个 SeekBar 值的 Android Java 总和

Question

being new in Android I'm trying to just simply add (sum) adjusted values from two SeekBars using setOnSeekBarChangeListener or using Button. The project below is work fine but the sum still is 0. I can't find a solution. Thanks for your help. Usually, I'm using Spring Boot and Vaadin and it is so simple :)

    private int progress1 = 0;
    private int progress2 = 0;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView textViewMain;
        Button button;
        final TextView textViewMain_ = findViewById(R.id.textViewMain);

        Button buttonSum = findViewById(R.id.button);
        SeekBar seekBar = findViewById(R.id.seekBar);
        final TextView textViewSeekBar = findViewById(R.id.textView2);
        SeekBar seekBar2 = findViewById(R.id.seekBar2);
        final TextView textViewSeekBar2 = findViewById(R.id.textView3);
        seekBar.setMax(600);
        seekBar.setProgress(5);
        seekBar2.setMax(900);
        seekBar2.setProgress(5);


        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            public int progress1 = 0;

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress1, boolean fromUser) {
                this.progress1 = progress1;
                // getUpdateTotal();
                //textViewSeekBar.setText(Integer.parseInt(String.valueOf(seekBar)));//todo not work
                textViewSeekBar.setText(Integer.toString(progress1));
                Log.i("Seeker1: ", Integer.toString(progress1));

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
        seekBar2.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {

            public int progress2 = 0;

            @Override
            public void onProgressChanged(SeekBar seekBar, int progress2, boolean fromUser) {
                this.progress2 = progress2;
                //getUpdateTotal();
                textViewSeekBar2.setText(Integer.toString(progress2));
                Log.i("Seeker2: ", Integer.toString(progress2));
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });


        buttonSum.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                getSummaryTwoSeekBarValue(progress1, progress2);
                Log.i("", getSummaryTwoSeekBarValue(progress1, progress2));

            }
        });

    }

    public String getSummaryTwoSeekBarValue(int progress1, int progress2) {

        final TextView textViewMain_ = findViewById(R.id.textViewMain);
        int total = progress1 + progress2;
        String totalString = String.valueOf(total);
        Log.i("", totalString);
        textViewMain_.setText(String.valueOf(totalString));
        return totalString;
    }


}```
[enter image description here][1]


  [1]: https://i.stack.imgur.com/HDx12.png

Answer 1

You are defining progress1 and progress2 in both the main class and in the listener, so the class variable will keep being 0, you have to use (your class name).this.progress1 = progress1; and same in the second seek bar to modify the main class one instead of the listener one

Answer 2

private int progress1;
private int progress2;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        TextView textViewMain;
        final TextView textViewMain_ = findViewById(R.id.textViewMain);
        SeekBar seekBar = findViewById(R.id.seekBar);
        final TextView textViewSeekBar = findViewById(R.id.textView2);
        SeekBar seekBar2 = findViewById(R.id.seekBar2);
        final TextView textViewSeekBar2 = findViewById(R.id.textView3);
        seekBar.setMax(600);
        seekBar.setProgress(5);
        seekBar2.setMax(900);
        seekBar2.setProgress(5);


        seekBar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress1, boolean fromUser) {
               getSummaryTwoSeekBarValue(progress1,progress2);
                textViewSeekBar.setText(Integer.toString(progress1));
                Log.i("Seeker1: ", Integer.toString(progress1));

            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });
        seekBar2.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
            @Override
            public void onProgressChanged(SeekBar seekBar, int progress2, boolean fromUser) {

          getSummaryTwoSeekBarValue(progress1,progress2);
                textViewSeekBar2.setText(Integer.toString(progress2));
                Log.i("Seeker2: ", Integer.toString(progress2));
            }

            @Override
            public void onStartTrackingTouch(SeekBar seekBar) {

            }

            @Override
            public void onStopTrackingTouch(SeekBar seekBar) {

            }
        });

    }

    public String getSummaryTwoSeekBarValue(int progress1, int progress2) {//int progress1, int progress2
      this.progress1=progress1;
      this.progress2=progress2;

        final TextView textViewMain_ = findViewById(R.id.textViewMain);
        int total = progress1 + progress2;
        String totalString = String.valueOf(total);
        Log.i("", totalString);
        textViewMain_.setText(String.valueOf(totalString));
        return totalString;
    }
}```