用集合调用构造函数类并从asyncTask获取sharedpreferences（无法传递上下文）

2024-05-15 • 问答

我在Constructor类中获取并设置了sharedPreferences

private Context context;
public NewBusiness (Context c) {
    this.context = c;
    pref = android.preference.PreferenceManager.getDefaultSharedPreferences(getapplicationContext());
    pref = context.getSharedPreferences("MyPref",0);
    editor = pref.edit();
}
public String getLogo() {
    return pref.getString("logo",logo);
}

public void setLogo(String logo) {
    editor.putString("logo",logo);
    editor.commit();
}

但是我从异步任务（使用WeakReference上下文，以防止内存泄漏）中调用它

private WeakReference<Context> contextRef;
public UploadBusiness(Context context) {
    contextRef = new WeakReference<>(context);
}
@Override
protected String doInBackground(Void... params) {

    newBusiness = new NewBusiness(contextRef); //Can´t use WeakReference<Context>
    return "Upload successful";
}

问题是弱引用上下文不能作为上下文传递

如何在不导致内存泄漏的情况下使用上下文调用构造函数类？

private WeakReference<Context> contextRef; public UploadBusiness(Context context) { contextRef = new WeakReference<>(context); } @Override protected String doInBackground(Void... params) { if(contextRef.get()!=null){ newBusiness = new NewBusiness(contextRef.get()); } return "Upload successful"; }

用集合调用构造函数类并从asyncTask获取sharedpreferences（无法传递上下文）

iCMS 回答：用集合调用构造函数类并从asyncTask获取sharedpreferences（无法传递上下文）

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