java - 错误:(25, 94)错误:不兼容的类型:SettingsFragment无法转换为Fragment

Question

import android.os.Bundle;
import android.preference.PreferenceFragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v7.app.AppCompatActivity;

import static android.R.attr.fragment;

public class AppPreferences extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState)
    {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_note_detail);

        FragmentManager fragmentManager = getSupportFragmentManager();
        FragmentTransaction fragmentTransaction = fragmentManager.beginTransaction();

        SettingsFragment settingsFragment = new SettingsFragment();
       // fragmentTransaction.add(android.R.id.content, settingsFragment, "SETTING_FRAGMENT");

这里开始的错误是settingsFragment，错误是Error:(25, 94) error: 不兼容的类型:SettingsFragment 无法转换为Fragment

FragmentTransaction setting_fragment = fragmentTransaction.add(android.R.id.content, settingsFragment, "SETTING_FRAGMENT");
setting_fragment.commit();

这是我的设置 fragment

public  static class SettingsFragment extends PreferenceFragment{

    @Override
    public void onCreate(Bundle savedInstanceState){
        super.onCreate(savedInstanceState);

        addPreferencesFromResource(R.xml.app_preferences);
    }
}

Answer 1

您应该使用(如果您想保持兼容性)支持 v7 兼容性库中包含的 PreferenceFragmentCompat。

PreferenceFragment 不包含在 fragment 的兼容性集中，因此将 PreferenceFragment 更改为 PreferenceFragmentCompat 应该足以满足您的需求。

检查this出来。

希望对你有帮助