小编Nik*_*oni的帖子

在偏好更改侦听器中我已将其设置为使用Loader然后填充来下载新数据ListView,但是onCreateLoader()当我更改首选项时仅调用该函数,onLoadFinished()回调函数仍然ListView未被调用,因此我没有更新新数据,我也碰巧有刷新按钮执行相同的操作,即下载数据增益并使用新数据填充列表,但此处onLoadFinished()通过更新列表调用.

刷新按钮代码

case R.id.menu_refresh :
            ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
            NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
            boolean isConnected = activeNetwork != null &&  activeNetwork.isConnectedOrConnecting();
            if(isConnected)
            {
                getSupportLoaderManager().initLoader(0,null,this).forceLoad();
            }
            else {
                Toast.makeText(this,"No Internet",Toast.LENGTH_SHORT).show();
            }
            break;

SharedPreference侦听器代码:

public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String s) {
    ConnectivityManager cm = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE);
    NetworkInfo activeNetwork = cm.getActiveNetworkInfo();
    boolean isConnected = activeNetwork != null &&  activeNetwork.isConnectedOrConnecting();
    if(isConnected)
    {
        //delfromold();
        getSupportLoaderManager().initLoader(0,null,this).forceLoad();
        Log.v("Prefrences Changed",s);
    }
}

编辑

装载机实施

public class Loade …