小编dev*_*011的帖子

我找不到关于复选框偏好的任何教程.我可以使用listpreference,但我不能使用checkbox首选项.现在,我希望如果用户在checbox上设置,一个toast msg说"true",如果他将其设置为关闭,那么toast msg会说"false".到目前为止我有这个:

的preferences.xml:

 <CheckBoxPreference
          android:title="Show Call UI"
          android:defaultValue="true"
          android:summary="Show Call Interface when clicking call button"
          android:key="checkboxPref" />

EditPreferences.java:

public class EditPreferences extends PreferenceActivity {

    String listPreference;
    boolean checkboxPreference;

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
    }

    public void onStart(Intent intent, int startId) {
        getPrefs();
    }

    private void getPrefs() {
        SharedPreferences prefs = PreferenceManager
                .getDefaultSharedPreferences(getBaseContext());
        listPreference = prefs.getString("listPref", "nr1");
        checkboxPreference = prefs.getBoolean("checkboxPref", true);
    }
}

编辑:解决方案感谢David Caunt:

checkboxPreference.
    setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {

    public boolean onPreferenceChange(Preference preference, Object newValue) {
        if …

在Android应用程序编程中,变量名长度真的重要吗？长变量名会影响Android应用程序的性能吗？

有人可以对这些错误有所了解

03-23 14:24:53.641 31726-32030/com.vpn W/dalvikvm: VFY: unable to find class referenced in signature (Ljava/nio/file/Path;)
03-23 14:24:53.644 31726-32030/com.vpn W/dalvikvm: VFY: unable to find class referenced in signature ([Ljava/nio/file/OpenOption;)
03-23 14:24:53.647 31726-32030/com.vpn I/dalvikvm: Could not find method java.nio.file.Files.newOutputStream, referenced from method okio.Okio.sink
03-23 14:24:53.647 31726-32030/com.vpn W/dalvikvm: VFY: unable to resolve static method 22324: Ljava/nio/file/Files;.newOutputStream (Ljava/nio/file/Path;[Ljava/nio/file/OpenOption;)Ljava/io/OutputStream;
03-23 14:24:53.647 31726-32030/com.vpn D/dalvikvm: VFY: replacing opcode 0x71 at 0x000a