Question

我正在尝试在MainActivity中设置TextView的文本。可以在SettingsActivity中更改和设置Textview的字符串。但不知何故，我的代码只使用默认值而不读取首选项文件...

问候

好的，所以我得到了以下

SettingsActivity.java

public class SettingsActivity extends PreferenceActivity {
    @SuppressWarnings("deprecation")
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        addPreferencesFromResource(R.xml.preferences);
    }
}

的preferences.xml

<PreferenceScreen xmlns:android="http://schemas.android.com/apk/res/android" >

    <EditTextPreference
        android:capitalize="words"
        android:defaultValue="@string/default_name"
        android:inputType="textCapWords"
        android:key="Username"
        android:maxLines="1"
        android:selectAllOnFocus="true"
        android:singleLine="true"
        android:title="@string/name_button" />

</PreferenceScreen>

MainActivity.java

SettingsTest    = (TextView) findViewById(R.id.SettingsTestName);

. . .

SharedPreferences prefs = this.getSharedPreferences("preferences.xml", this.MODE_PRIVATE);
String name = prefs.getString("Username", "Username angeben");

SettingsTest.setText(name);

但由于某些原因，我只在TextView中获得默认值"Username angeben"

Answer 1

做这样的事情：

SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(activity);
String nickname = prefs.getString("Username", "Username angeben");

TextView的SetText通过属性读取器

1 个答案: