RoboGuice 注入不同的 SharedPreferences

Question

在RoboGuice我使用的时候：

@Inject
SharedPreferences prefs;

它注入默认 SharedPreferences
如何注入 非默认 首选项？
喜欢 context.getSharedPreferences("my_prefs", Context.MODE_PRIVATE)

Answer 1

来自 Roboguice 文档：

Shared Preferences

Class: SharedPreferences

Provider: SharedPreferencesProvider

Scope: Transient Injection

Points: Constructors, Fields, Methods By default

roboguice will retrieve an instance of Android SharedPreferences using the filename: "default". This is not the default file name android uses for your shared preferences. If you would like to override the file name then you can set up a binding when RoboGuice is initialized.

Android Default Shared Preferences File Name Binding
bindConstant()
    .annotatedWith(SharedPreferencesName.class)
    .to("com.mypackage.myapp_preferences");  
Example
public class MyActivity extends RoboActivity {
  @Inject SharedPreferences sharedPreferences;
} 
Provider Example
public class MyActivity extends RoboActivity {
  @Inject Provider<SharedPreferences> sharedPreferencesrProvider;
}
From: https://github.com/roboguice/roboguice/wiki/Provided-Injections

我以前没用过RoboGuice，但我很确定：

@Inject
SharedPreferences prefs;

等同于：

SharedPreferences prefs = getActivity().getPreferences(Context.MODE_PRIVATE);

所以如果你想得到一个键值，你只能使用：

int highScore = prefs.getInt("my_prefs", defaultValue);

并输入一个新值：

editor.putInt("my_prefs", newHighScore);

希望对您有所帮助

RoboGuice 注入不同的 SharedPreferences

RoboGuice inject different SharedPreferences

android

android-studio

dependency-injection

guice

roboguice

Shared Preferences