如何验证至少应选中一个复选框？并显示警报消息

Question

我要确认至少选中了一个复选框。下面是我正在使用的代码。

public classGejalaKariesGigiActivityextendsAppCompatActivity {

    Intent intentData;
    Button buttonSend;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gejala_karies_gigi);
        intentData = new Intent(GejalaKariesGigiActivity.this,HasilDiagnosaActivity.class);
        buttonSend = (Button) findViewById(R.id.buttonselesai1);
        buttonSend.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                startActivity(intentData);
            }

        });

    }

    public void selectItem(View view){
        boolean checked = ((CheckBox) view).isChecked();
            switch (view.getId()) {
                case R.id.checkBoxgigiberlubang:if (checked){
                    intentData.putExtra("gigi_berlubang","Gigi Berlubang");
                }else {
                    intentData.removeExtra("gigi_berlubang");
                }break;

                case R.id.checkBoxngilu:if (checked){
                    intentData.putExtra("ngilu","Ngilu");
                }else {
                    intentData.removeExtra("ngilu");
                }break;

                case R.id.checkBoxadabercak:if (checked){
                    intentData.putExtra("ada_bercak_hitam_pada_gigi","Ada Bercak Hitam Pada Gigi");
                }else {
                    intentData.removeExtra("ada_bercak_hitam_pada_gigi");
                }break;

                default:break;
            }

    }

}

Answer 1

您必须在if else语句中选中每个复选框。

    try
    {
        BufferedImage original = ImageIO.read(OriginalImage);
        BufferedImage resized = new BufferedImage(width, null, original.getType());
        Graphics2D g2 = resized.createGraphics();
        g2.drawImage(original, 0, 0, width, null, null);
        g2.dispose();
        ImageIO.write(resized, format, resizedImage);
    }