3

几个星期以来，我一直在尝试向我的应用程序添加一些首选项

我真的只需要复选框功能。

我正在尝试通过选中复选框来控制单个单选按钮的可见性

这是我的 Preferences.java

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.CheckBoxPreference;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.PreferenceManager;
import android.preference.Preference.OnPreferenceClickListener;
import android.preference.Preference.OnPreferenceChangeListener;
import android.widget.Button;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.Toast;
import android.widget.CompoundButton.OnCheckedChangeListener;
import android.view.View;


public class Preferences extends PreferenceActivity {

private RadioButton btn01;


@Override
protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       addPreferencesFromResource(R.xml.prefs);
       btn01 = (RadioButton)findViewById(R.id.RadioButton01);

       Preference customPref = (Preference) findPreference("customPref");

                      customPref.setOnPreferenceClickListener(new OnPreferenceClickListener(){

                          public boolean onPreferenceClick(Preference preference) {
                          Toast.makeText(getBaseContext(),
                                                      "The Custom Preference Has Been Clicked",
                                                      Toast.LENGTH_LONG).show();
                          SharedPreferences customSharedPreference = getSharedPreferences(
                                           "myCutomSharedPrefs", Activity.MODE_PRIVATE);
                          SharedPreferences.Editor editor = customSharedPreference
                                           .edit();
                          editor.putString("myCustomPref",
                                           "The preference has been clicked");
                          editor.commit();
                          return true;}

                          public void CheckBox() {

                          final CheckBox ThisCheckBox = (CheckBox) findViewById (R.id.checkboxPref);{   
                          ThisCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener(){

                              public boolean OnCheckedChange (CompoundButton compoundButton) {
                          if (ThisCheckBox.isChecked()){ 

                          {
                          btn01.setVisibility(0);
                          }{

                          btn01.setVisibility(2);

                          }}                                    
}                            


;
});


};}});}}

无论如何，我很确定这是完全错误的，我在这条线上得到了一个错误

ThisCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener(){

知道为什么吗？我认为这与我调用上述行的方式有关，但无论我使用 final、boolean 还是 void 它仍然会产生错误

这是错误信息

类型 new CompoundButton.OnCheckedChangeListener(){} 必须实现继承的抽象方法 CompoundButton.OnCheckedChangeListener.onCheckedChanged(CompoundButton, boolean)

所以我想我要问的是

我是否正确执行首选项以及如何正确执行 If else 命令？

4

2 回答 2

2

我认为您尝试覆盖的方法的签名不正确。替换这个：

public boolean OnCheckedChange (CompoundButton compoundButton) {

有了这个：

@Override
public void onCheckedChanged(CompoundButton compoundButton, boolean isChecked) {

编辑 好的，这是修复整个班级的尝试。备份您当前的代码，然后选择下面的所有代码，然后复制它。选择您班级中的所有代码并将其替换为：

import android.app.Activity;
import android.content.SharedPreferences;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceActivity;
import android.preference.Preference.OnPreferenceClickListener;
import android.widget.CheckBox;
import android.widget.CompoundButton;
import android.widget.RadioButton;
import android.widget.Toast;
import android.widget.CompoundButton.OnCheckedChangeListener;

public class Preferences extends PreferenceActivity {

    private RadioButton btn01;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.prefs);
        btn01 = (RadioButton)findViewById(R.id.RadioButton01);
        Preference customPref = (Preference) findPreference("customPref");

        customPref.setOnPreferenceClickListener(new OnPreferenceClickListener(){

            public boolean onPreferenceClick(Preference preference) {
                Toast.makeText(getBaseContext(),"The Custom Preference Has Been Clicked",Toast.LENGTH_LONG).show();
                SharedPreferences customSharedPreference = getSharedPreferences("myCutomSharedPrefs", Activity.MODE_PRIVATE);
                SharedPreferences.Editor editor = customSharedPreference.edit();
                editor.putString("myCustomPref","The preference has been clicked");
                editor.commit();
                return true;
            }

            public void CheckBox() {
                final CheckBox ThisCheckBox = (CheckBox) findViewById (R.id.checkboxPref);
                ThisCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener(){
                    @Override
                    public void onCheckedChanged(CompoundButton compoundButton,boolean test) {
                        if (ThisCheckBox.isChecked()){ 
                            btn01.setVisibility(0);
                        } else {
                            btn01.setVisibility(2);
                        }
                    }
                });
            };
        });
    }
}

上面的代码在eclipse中编译没有问题

于 2011-01-04T14:45:36.393 回答
0

Use the built-in CheckBoxPreference class and check out this article on setting and using preferences:

http://www.kaloer.com/android-preferences

Using your code above, there are several errors in it (apart from those already identified) namely, your if/else statement is missing an 'else' and the curly braces do not appear to match (assuming that pasting the code in hasn't screwed it up) - This appears to compile ok:

import android.app.Activity;

import android.content.SharedPreferences; import android.os.Bundle; import android.preference.CheckBoxPreference; import android.preference.Preference; import android.preference.PreferenceActivity; import android.preference.PreferenceManager; import android.preference.Preference.OnPreferenceClickListener; import android.preference.Preference.OnPreferenceChangeListener; import android.widget.Button; import android.widget.CheckBox; import android.widget.CompoundButton; import android.widget.RadioButton; import android.widget.Toast; import android.widget.CompoundButton.OnCheckedChangeListener; import android.view.View;

public class Preferences extends PreferenceActivity { private RadioButton btn01;

@Override
protected void onCreate(Bundle savedInstanceState)
{
       super.onCreate(savedInstanceState);
       addPreferencesFromResource(R.xml.prefs);
       btn01 = (RadioButton)findViewById(R.id.RadioButton01);

       Preference customPref = (Preference) findPreference("customPref");

      customPref.setOnPreferenceChangeListener(new OnPreferenceChangeListener()
      {
          @Override
          public boolean onPreferenceChange(Preference preference, Object object)
          {
              Toast.makeText(getBaseContext(), "The Custom Preference Has Been Clicked", Toast.LENGTH_LONG).show();
              SharedPreferences customSharedPreference = getSharedPreferences("myCutomSharedPrefs", Activity.MODE_PRIVATE);
              SharedPreferences.Editor editor = customSharedPreference.edit();
              editor.putString("myCustomPref", "The preference has been clicked");
              editor.commit();
              return true;
          }
      });
}

  public void CheckBox()
  {

      final CheckBox ThisCheckBox = (CheckBox) findViewById (R.id.checkboxPref);

      ThisCheckBox.setOnCheckedChangeListener(new OnCheckedChangeListener()
      { 
          //@Override
          public void onCheckedChanged (CompoundButton compoundButton, boolean isChecked)
          {
              if (ThisCheckBox.isChecked())
              {
                  btn01.setVisibility(0);           
              }
              else
              {
                 btn01.setVisibility(2);

              }                                    
         }
      });
  }

}

于 2011-01-04T13:08:44.837 回答