LockMethodFragment.java

package ml.puredark.hviewer.ui.fragments;

import android.annotation.SuppressLint;
import android.content.Context;
import android.os.Bundle;
import android.preference.Preference;
import android.preference.PreferenceFragment;
import android.preference.PreferenceScreen;
import android.support.v7.app.AlertDialog;
import android.text.TextUtils;
import android.widget.BaseAdapter;

import ml.puredark.hviewer.R;
import ml.puredark.hviewer.ui.activities.BaseActivity;
import ml.puredark.hviewer.utils.PatternLockUtils;
import ml.puredark.hviewer.utils.SharedPreferencesUtil;

/**
 * Created by PureDark on 2016/9/25.
 */
public class LockMethodFragment extends PreferenceFragment {
    public static final String KEY_PREF_PIN_LOCK = "pref_pin_lock";
    public static final String KEY_PREF_PATTERN_LOCK = "pref_pattern_lock";
    public static final String KEY_PREF_CLEAR_LOCK_METHODS = "pref_clear_lock_methods";
    public static final String KEY_PREF_CURR_LOCK_METHOD = "pref_curr_lock_method";

    public static final int METHOD_NONE = 0;
    public static final int METHOD_PATTERN = 1;
    public static final int METHOD_PIN = 2;

    private BaseActivity activity;

    public LockMethodFragment() {
    }

    @SuppressLint("ValidFragment")
    public LockMethodFragment(BaseActivity activity) {
        this.activity = activity;
    }

    public static int getCurrentLockMethod(Context context) {
        boolean isPatternLock = PatternLockUtils.hasPattern(context);
        String pin = (String) SharedPreferencesUtil.getData(context, LockMethodFragment.KEY_PREF_PIN_LOCK, "");
        boolean isPinLock = !TextUtils.isEmpty(pin);
        String lastSet = (String) SharedPreferencesUtil.getData(context, LockMethodFragment.KEY_PREF_CURR_LOCK_METHOD, "");
        if (!TextUtils.isEmpty(lastSet) && "pin".equals(lastSet))
            return (isPinLock) ? METHOD_PIN : (isPatternLock) ? METHOD_PIN : METHOD_NONE;
        else
            return (isPatternLock) ? METHOD_PATTERN : (isPinLock) ? METHOD_PIN : METHOD_NONE;
    }

    @Override
    public void onCreate(final Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        getPreferenceManager().setSharedPreferencesName(SharedPreferencesUtil.FILE_NAME);
        addPreferencesFromResource(R.xml.preferences_lock_methods);
    }

    @Override
    public void onResume() {
        super.onResume();
        refresh(getPreferenceScreen());
    }

    @Override
    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
        if (preference.getKey().equals(KEY_PREF_CLEAR_LOCK_METHODS)) {
            //清空所有解锁方式
            new AlertDialog.Builder(activity).setTitle(activity.getString(R.string.setting_dialog_message_clear_lock_methods))
                    .setPositiveButton(getString(R.string.ok), (dialog, which) -> {
                        PatternLockUtils.clearPattern(activity);
                        SharedPreferencesUtil.deleteData(activity, KEY_PREF_PIN_LOCK);
                        SharedPreferencesUtil.deleteData(activity, KEY_PREF_CURR_LOCK_METHOD);
                        activity.showSnackBar(activity.getString(R.string.setting_lock_methods_cleared));
                        refresh(preferenceScreen);
                    })
                    .setNegativeButton(getString(R.string.cancel), null).show();
        }
        return super.onPreferenceTreeClick(preferenceScreen, preference);
    }

    private void refresh(PreferenceScreen preferenceScreen) {
        ((BaseAdapter) preferenceScreen.getRootAdapter()).notifyDataSetChanged();
    }

}