Question

我在一项活动中设置了4个RadioButton。

我遇到问题，当我点击“ALL”RadioButton时，它显示对应于“CATEGORIES”RadioButton的吐司。此外，当我点击“CATEGORIES”RadioButton时，它会显示对应于“ABOUT”RadioButton的toast。然后当我点击“关于”RadioButton时，没有任何显示。

我知道这与一些没有正确指导的事情有关，但似乎无法找出它是什么。

仅供参考：稍后我会用这些RadioButton打开活动，这就是为什么我还没有完成GetText而只使用了1个OnCheckedChangeListener

任何帮助将不胜感激！

MainActivity：

public class MainActivity extends Activity {

GridView list;
LazyAdapter adapter;

@Override
public void onCreate(Bundle savedInstanceState) {

    this.requestWindowFeature(Window.FEATURE_NO_TITLE);
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    list = (GridView) findViewById(R.id.list);
    adapter = new LazyAdapter(this, mStrings);
    list.setAdapter(adapter);

    RadioButton radioButton;
    radioButton = (RadioButton) findViewById(R.id.btnAll);

    radioButton.setOnCheckedChangeListener(btnAllOnCheckedChangeListener);
    radioButton = (RadioButton) findViewById(R.id.btnAll);

    radioButton
            .setOnCheckedChangeListener(btnCategoriesOnCheckedChangeListener);
    radioButton = (RadioButton) findViewById(R.id.btnCategories);

    radioButton
            .setOnCheckedChangeListener(btnPopularOnCheckedChangeListener);
    radioButton = (RadioButton) findViewById(R.id.btnPopular);

    radioButton.setOnCheckedChangeListener(btnAboutOnCheckedChangeListener);
    radioButton = (RadioButton) findViewById(R.id.btnAbout);
}

private CompoundButton.OnCheckedChangeListener btnAllOnCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        if (isChecked) {

            Toast.makeText(getApplicationContext(), "Opened ALL tab", Toast.LENGTH_LONG).show();
        }
    }

};

private CompoundButton.OnCheckedChangeListener btnCategoriesOnCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        if (isChecked) {

            Toast.makeText(getApplicationContext(), "Opened CATEGORIES tab", Toast.LENGTH_LONG).show();

        }
    }

};

private CompoundButton.OnCheckedChangeListener btnPopularOnCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        if (isChecked) {
            Toast.makeText(getApplicationContext(), "Opened POPULAR tab", Toast.LENGTH_LONG).show();
        }
    }

};

private CompoundButton.OnCheckedChangeListener btnAboutOnCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {
    public void onCheckedChanged(CompoundButton buttonView,
            boolean isChecked) {
        if (isChecked) {
            Toast.makeText(getApplicationContext(), "Opened ABOUT tab", Toast.LENGTH_LONG).show();
        }
    }

};

Answer 1

// Replace this code and try
@Override
    public void onCreate(Bundle savedInstanceState) {

        this.requestWindowFeature(Window.FEATURE_NO_TITLE);
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        list = (GridView) findViewById(R.id.list);
        adapter = new LazyAdapter(this, mStrings);
        list.setAdapter(adapter);

        RadioButton btnAll  = (RadioButton) findViewById(R.id.btnAll);
        btnCategories.setOnCheckedChangeListener(btnAllOnCheckedChangeListener);

        RadioButton btnCategories  = (RadioButton) findViewById(R.id.btnCategories);
        btnCategories.setOnCheckedChangeListener(btnCategoriesOnCheckedChangeListener);

        RadioButton btnPopular  = (RadioButton) findViewById(R.id.btnPopular);
        btnPopular.setOnCheckedChangeListener(btnPopularOnCheckedChangeListener);

        RadioButton btnAbout = (RadioButton) findViewById(R.id.btnAbout);
        btnAbout.setOnCheckedChangeListener(btnAboutOnCheckedChangeListener);
    }

Answer 2

您重复所有单选按钮两次。代码应该是：

RadioButton radioButton;
radioButton = (RadioButton) findViewById(R.id.btnAll);

radioButton.setOnCheckedChangeListener(btnAllOnCheckedChangeListener);
radioButton = (RadioButton) findViewById(R.id.btnCategories);

radioButton
        .setOnCheckedChangeListener(btnCategoriesOnCheckedChangeListener);
radioButton = (RadioButton) findViewById(R.id.btnPopular);

radioButton
        .setOnCheckedChangeListener(btnPopularOnCheckedChangeListener);
radioButton = (RadioButton) findViewById(R.id.btnAbout);

radioButton.setOnCheckedChangeListener(btnAboutOnCheckedChangeListener);

Answer 3

以这种方式制作单个CompoundButton.OnCheckedChangeListener：

private CompoundButton.OnCheckedChangeListener btnOnCheckedChangeListener = new CompoundButton.OnCheckedChangeListener() {
            public void onCheckedChanged(CompoundButton buttonView,
                    boolean isChecked) {
                switch buttonView{
                case btn1:
    //your logic
    and so on
               }
            }

        };

并为所有按钮应用此侦听器

OnCheckedChangeListener没有正确响应

3 个答案: