Android 使用广播接收器中其他类的共享首选项
我是android新手。我正在使用一个SessionHandler类,在该类中,我从共享首选项中的LoginActivity保存用户名。我想从广播接收器类中的共享首选项访问此用户名 下面是SessionHandler类的代码Android 使用广播接收器中其他类的共享首选项,android,broadcastreceiver,sharedpreferences,Android,Broadcastreceiver,Sharedpreferences,我是android新手。我正在使用一个SessionHandler类,在该类中,我从共享首选项中的LoginActivity保存用户名。我想从广播接收器类中的共享首选项访问此用户名 下面是SessionHandler类的代码 public SharedPreferences getLoginPreferences() { // This sample app persists the registration ID in shared preferences, // but
public SharedPreferences getLoginPreferences() {
// This sample app persists the registration ID in shared preferences,
// but
// how you store the regID in your app is up to you.
return context.getSharedPreferences(
LoginActivity.class.getSimpleName(), Context.MODE_PRIVATE);
}
public void storeLoginSession(String str_Name) {
final SharedPreferences prefs = getLoginPreferences();
SharedPreferences.Editor editor = prefs.edit();
editor.putString("name", str_Name);
editor.commit();
}
我想在startService()中访问此名称
我怎样才能得到这个值?我试着使用上下文,但不起作用。任何人都可以帮助我。创建一个名为AppPreference.class的类
public class AppPreference {
private SharedPreferences mSharedPreferences;
public static final String KEY_LOGIN= "KEY_LOGIN";
public AppPreference(Context context) {
super();
mSharedPreferences = context.getSharedPreferences(context.getString(R.string.app_name), Context.MODE_PRIVATE);
}
public void setLoginStatus(String value) {
SharedPreferences.Editor editor = mSharedPreferences.edit();
editor.putString(KEY_POSTCODE_LOGIN, value);
editor.commit();
}
public String getLoginStatus() {
return mSharedPreferences.getString(KEY_POSTCODE_LOGIN,"");
}
}
您可以通过调用
AppPreference appPreference = new AppPreference(context);
appPreference .setLoginStatus("value you want to save");
getvalue调用
AppPreference appPreference = new AppPreference(context);
appPreference .getLoginStatus();
您好,请使用此示例代码 公共类优先处理程序 { 公共静态布尔StoreNameTopReference(上下文, 字符串键,字符串getDetailsString){ } 正在从首选项类获取字符串: 在抽样课上
String name=PreferenceHandler.getNameFromPreference(sampleActivity.this,key);您可以为SharedReference创建全局函数:
public static void setSharedPrefString(Context context, String key, String value) {
SharedPreferences preference = PreferenceManager.getDefaultSharedPreferences(context);
SharedPreferences.Editor editor = preference.edit();
editor.putString(key, value);
editor.commit();
}
public static String getSharedPrefString(Context context, String key) {
SharedPreferences preference = PreferenceManager.getDefaultSharedPreferences(context);
if (preference != null) {
return preference.getString(key, "");
}
return "";
}
从BroadcastReceive的onReceive调用“getSharedPrefString”。
如果您觉得它有用,请告诉我。使用SharedReference的最佳方法是将其包装在自定义首选项类中,如:
public class YourPreference {
private static YourPreference yourPreference;
private SharedPreferences sharedPreferences;
public static YourPreference getInstance(Context context) {
if (yourPreference == null) {
yourPreference = new YourPreference(context);
}
return yourPreference;
}
private YourPreference(Context context) {
sharedPreferences = context.getSharedPreferences("YourCustomNamedPreference",Context.MODE_PRIVATE);
}
public void storeLoginSession(String str_Name) {
SharedPreferences.Editor prefsEditor = sharedPreferences.edit();
editor.putString("name", str_Name);
prefsEditor.commit();
}
}
然后,您可以使用以下命令从contet可用的任何类中获取PreFrence实例
YourPreference yourPrefrence = YourPreference.getInstance(context);
yourPreference.storeLoginSession(YOUR_STRING);
我这样做很简单: 主要类别:
public class SWP extends Activity implements LocationListener
{ ....
public static final String MY_PREFERENCES = "SWP_Preferences";
public static SharedPreferences preferencesSwp;
public static SharedPreferences.Editor preferencesEditorSwp;
...
@Override
protected void onCreate(Bundle savedInstanceState)
{ ....
preferencesSwp = getSharedPreferences(MY_PREFERENCES, Activity.MODE_PRIVATE);
preferencesEditorSwp = preferencesSwp.edit();
....
}
....
}
在任何其他情况下,阅读
value1 = SWP.preferencesSwp.getString("PREF_value1", "init_text");
写
SWP.preferencesEditorSwp.putString("PREF_value1", value1 );
SWP.preferencesEditorSwp.commit();
如果您使用了上下文,则看不出这是一种完美的方式,但我建议使用apply()而不是commit(),请参见此处了解原因:它异步运行,这很好!
value1 = SWP.preferencesSwp.getString("PREF_value1", "init_text");
SWP.preferencesEditorSwp.putString("PREF_value1", value1 );
SWP.preferencesEditorSwp.commit();