在android（Java）中使用复选框查找所选项目的总数

Question

我在一项活动中有一些 checkbox（假设有 5 个）和一个 button。当我单击按钮时，Toast 将显示选中的复选框总数。

Answer 1

根据您的问题，这可能是您问题的答案。希望这会有所帮助..如果您可以提供有关您的要求的更多信息，我们可以以更好的方式提供帮助

private CheckBox one, two, three, four, five;// checkboxes you want
Button btn;
int count = 0;

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

    one=findViewById(R.id.one);
    two=findViewById(R.id.two);
    three=findViewById(R.id.three);
    four=findViewById(R.id.four);
    five=findViewById(R.id.five);
    btn=findViewById(R.id.btn);


    one.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            isCheckedOrNot(isChecked);
        }
    });
    two.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            isCheckedOrNot(isChecked);
        }
    });
    three.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            isCheckedOrNot(isChecked);
        }
    });
    four.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            isCheckedOrNot(isChecked);
        }
    });
    five.setOnCheckedChangeListener(new CompoundButton.OnCheckedChangeListener() {
        @Override
        public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
            isCheckedOrNot(isChecked);
        }
    });

    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            Toast.makeText(getApplicationContext(), count + " checkbox checked", Toast.LENGTH_SHORT).show();
        }
    });
}

private void isCheckedOrNot(boolean isChecked) {
    if (isChecked) {
        count++;
    } else {
        if (count > 0) {
            count--;
        }
    }
}

Answer 2

btn = findViewById(R.id.btn);
rb = findViewById(R.id.rb); // make 5 of them
int x=0;

        rb.setOnClickListener(new View.OnClickListener() { // make 5 of them
            @Override
            public void onClick(View v) {
                boolean checked = ((RadioButton) v).isChecked();
                // Check which radiobutton was pressed
                if (checked){
                    x++;
                    }
                }

            }
        });


    btn.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
         System.out.println(x);
        }
      });