android - 如何将偏好类别显示为卡片 View ？

Question

我想将 PreferenceCategory 显示为 CardView。

在官方 Lollipop 首选项屏幕中，他们不直接使用 CardView，但不同首选项类别之间也存在差距。我该怎么做？

这是我的首选项代码:

首选项 fragment (PreferenceFragment)

/**
 * Created by xisberto on 08/11/14.
 */
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
public class PrefsFragment extends PreferenceFragment {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        String category = getArguments().getString("category");
        if (category != null) {
            if (category.equals(getString(R.string.category_general))) {
                addPreferencesFromResource(R.xml.prefs_general);
            } else if (category.equals(getString(R.string.category_advanced))) {
                addPreferencesFromResource(R.xml.prefs_erscheinungsbild);
            }
        }
    }
}

首选项(PreferenceActivity)

public class Preferences extends PreferenceActivity {
    private Toolbar mToolBar;

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

        prepareLayout();

        buildLegacyPreferences();
    }

    private void prepareLayout() {
        ViewGroup root = (ViewGroup) findViewById(android.R.id.content);
        View content = root.getChildAt(0);
        LinearLayout toolbarContainer = (LinearLayout) View.inflate(this, R.layout.activity_prefs, null);

        root.removeAllViews();
        toolbarContainer.addView(content);
        root.addView(toolbarContainer);

        mToolBar = (Toolbar) toolbarContainer.findViewById(R.id.toolbar);
        mToolBar.setTitle(getTitle());
        mToolBar.setNavigationIcon(R.drawable.abc_ic_ab_back_mtrl_am_alpha);
        mToolBar.setNavigationOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                finish();
            }
        });
    }

    private void buildLegacyPreferences() {
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.HONEYCOMB) {
            String action = getIntent().getAction();
            if (action == null) {
                addPreferencesFromResource(R.xml.headers_legacy);
            } else if (action.equals(getString(R.string.category_general))) {
                mToolBar.setTitle(getString(R.string.header_general));
                addPreferencesFromResource(R.xml.prefs_general);
            } else if (action.equals(getString(R.string.category_advanced))) {
                mToolBar.setTitle(getString(R.string.header_general));
                addPreferencesFromResource(R.xml.prefs_erscheinungsbild);
            }
        }
    }

    @TargetApi(Build.VERSION_CODES.HONEYCOMB)
    @Override
    public void onBuildHeaders(List<Header> target) {
        super.onBuildHeaders(target);
        loadHeadersFromResource(R.xml.headers, target);
    }

    @TargetApi(Build.VERSION_CODES.KITKAT)
    @Override
    protected boolean isValidFragment(String fragmentName) {
        return fragmentName.equals(PrefsFragment.class.getName());
    }

    public static int getToastDuration(Context context) {
        return (PreferenceManager.getDefaultSharedPreferences(context).getString(PreferenceNames.TOAST_DURATION, "0").equals("0")) ? 0 : 1;
    }
}

Answer 1

您必须使用此 CardView 创建另一个布局/xml 文件(例如 preference_category_layout)，然后

<android.support.v7.preference.PreferenceCategory
            android:layout="@layout/preference_category_layout">