DefaultAppPickerFragment.java revision 3c89d8e2cfe5bc338f3e285945b6836cd2f69b05 
1/*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package com.android.settings.applications.defaultapps;
18
19import android.app.Activity;
20import android.app.AlertDialog;
21import android.app.Dialog;
22import android.app.DialogFragment;
23import android.app.Fragment;
24import android.content.Context;
25import android.content.DialogInterface;
26import android.os.Bundle;
27import android.os.UserHandle;
28import android.os.UserManager;
29import android.support.annotation.VisibleForTesting;
30import android.support.v7.preference.Preference;
31import android.support.v7.preference.PreferenceScreen;
32import android.text.TextUtils;
33import android.util.ArrayMap;
34import android.view.LayoutInflater;
35import android.view.View;
36import android.view.ViewGroup;
37
38import com.android.internal.logging.nano.MetricsProto;
39import com.android.settings.R;
40import com.android.settings.Utils;
41import com.android.settings.applications.PackageManagerWrapper;
42import com.android.settings.applications.PackageManagerWrapperImpl;
43import com.android.settings.core.InstrumentedPreferenceFragment;
44import com.android.settings.core.instrumentation.InstrumentedDialogFragment;
45import com.android.settings.widget.RadioButtonPreference;
46
47import java.util.List;
48import java.util.Map;
49
50/**
51 * A generic app picker fragment that shows a list of app as radio button group.
52 */
53public abstract class DefaultAppPickerFragment extends InstrumentedPreferenceFragment implements
54        RadioButtonPreference.OnClickListener {
55
56    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
57    static final String EXTRA_FOR_WORK = "for_work";
58
59    private final Map<String, DefaultAppInfo> mCandidates = new ArrayMap<>();
60
61    protected PackageManagerWrapper mPm;
62    protected UserManager mUserManager;
63    protected int mUserId;
64
65    @Override
66    public void onAttach(Context context) {
67        super.onAttach(context);
68        mPm = new PackageManagerWrapperImpl(context.getPackageManager());
69        mUserManager = (UserManager) context.getSystemService(Context.USER_SERVICE);
70        final Bundle arguments = getArguments();
71
72        boolean mForWork = false;
73        if (arguments != null) {
74            mForWork = arguments.getBoolean(EXTRA_FOR_WORK);
75        }
76        final UserHandle managedProfile = Utils.getManagedProfile(mUserManager);
77        mUserId = mForWork && managedProfile != null
78                ? managedProfile.getIdentifier()
79                : UserHandle.myUserId();
80    }
81
82    @Override
83    public View onCreateView(LayoutInflater inflater, ViewGroup container,
84            Bundle savedInstanceState) {
85        final View view = super.onCreateView(inflater, container, savedInstanceState);
86        setHasOptionsMenu(true);
87        return view;
88    }
89
90    @Override
91    public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
92        super.onCreatePreferences(savedInstanceState, rootKey);
93        addPreferencesFromResource(R.xml.app_picker_prefs);
94        updateCandidates();
95    }
96
97    @VisibleForTesting
98    public void updateCandidates() {
99        mCandidates.clear();
100        final List<? extends DefaultAppInfo> candidateList = getCandidates();
101        if (candidateList != null) {
102            for (DefaultAppInfo info : candidateList) {
103                mCandidates.put(info.getKey(), info);
104            }
105        }
106        final String defaultAppKey = getDefaultAppKey();
107        final String systemDefaultAppKey = getSystemDefaultAppKey();
108        final PreferenceScreen screen = getPreferenceScreen();
109        screen.removeAll();
110        if (shouldShowItemNone()) {
111            final RadioButtonPreference nonePref = new RadioButtonPreference(getPrefContext());
112            nonePref.setIcon(R.drawable.ic_remove_circle);
113            nonePref.setTitle(R.string.app_list_preference_none);
114            nonePref.setChecked(TextUtils.isEmpty(defaultAppKey));
115            nonePref.setOnClickListener(this);
116            screen.addPreference(nonePref);
117        }
118        for (Map.Entry<String, DefaultAppInfo> app : mCandidates.entrySet()) {
119            RadioButtonPreference pref = new RadioButtonPreference(getPrefContext());
120            configurePreferenceFromAppInfo(
121                    pref, app.getKey(), app.getValue(), defaultAppKey, systemDefaultAppKey);
122            screen.addPreference(pref);
123        }
124        mayCheckOnlyRadioButton();
125    }
126
127    @Override
128    public void onRadioButtonClicked(RadioButtonPreference selected) {
129        final String selectedKey = selected.getKey();
130        final String confirmationMessage = getConfirmationMessage(mCandidates.get(selectedKey));
131        final Activity activity = getActivity();
132        if (TextUtils.isEmpty(confirmationMessage)) {
133            onRadioButtonConfirmed(selectedKey);
134        } else if (activity != null) {
135            final DialogFragment fragment = ConfirmationDialogFragment.newInstance(
136                    this, selectedKey, confirmationMessage);
137            fragment.show(activity.getFragmentManager(), ConfirmationDialogFragment.TAG);
138        }
139    }
140
141    private void onRadioButtonConfirmed(String selectedKey) {
142        final boolean success = setDefaultAppKey(selectedKey);
143        if (success) {
144            updateCheckedState(selectedKey);
145        }
146        onSelectionPerformed(success);
147    }
148
149    @VisibleForTesting
150    public void updateCheckedState(String selectedKey) {
151        final PreferenceScreen screen = getPreferenceScreen();
152        if (screen != null) {
153            final int count = screen.getPreferenceCount();
154            for (int i = 0; i < count; i++) {
155                final Preference pref = screen.getPreference(i);
156                if (pref instanceof RadioButtonPreference) {
157                    final RadioButtonPreference radioPref = (RadioButtonPreference) pref;
158                    final boolean newCheckedState = TextUtils.equals(pref.getKey(), selectedKey);
159                    if (radioPref.isChecked() != newCheckedState) {
160                        radioPref.setChecked(TextUtils.equals(pref.getKey(), selectedKey));
161                    }
162                }
163            }
164        }
165    }
166
167    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
168    void mayCheckOnlyRadioButton() {
169        final PreferenceScreen screen = getPreferenceScreen();
170        // If there is only 1 thing on screen, select it.
171        if (screen != null && screen.getPreferenceCount() == 1) {
172            final Preference onlyPref = screen.getPreference(0);
173            if (onlyPref instanceof RadioButtonPreference) {
174                ((RadioButtonPreference) onlyPref).setChecked(true);
175            }
176        }
177    }
178
179    protected boolean shouldShowItemNone() {
180        return false;
181    }
182
183    protected String getSystemDefaultAppKey() {
184        return null;
185    }
186
187    protected abstract List<? extends DefaultAppInfo> getCandidates();
188
189    protected abstract String getDefaultAppKey();
190
191    protected abstract boolean setDefaultAppKey(String key);
192
193    // Called after the user tries to select an item.
194    protected void onSelectionPerformed(boolean success) {
195    }
196
197    protected String getConfirmationMessage(DefaultAppInfo appInfo) {
198        return null;
199    }
200
201    public static class ConfirmationDialogFragment extends InstrumentedDialogFragment
202            implements DialogInterface.OnClickListener {
203
204        public static final String TAG = "DefaultAppConfirm";
205        public static final String EXTRA_KEY = "extra_key";
206        public static final String EXTRA_MESSAGE = "extra_message";
207
208        @Override
209        public int getMetricsCategory() {
210            return MetricsProto.MetricsEvent.DEFAULT_APP_PICKER_CONFIRMATION_DIALOG;
211        }
212
213        public static ConfirmationDialogFragment newInstance(DefaultAppPickerFragment parent,
214                String key, String message) {
215            final ConfirmationDialogFragment fragment = new ConfirmationDialogFragment();
216            final Bundle argument = new Bundle();
217            argument.putString(EXTRA_KEY, key);
218            argument.putString(EXTRA_MESSAGE, message);
219            fragment.setArguments(argument);
220            fragment.setTargetFragment(parent, 0);
221            return fragment;
222        }
223
224        @Override
225        public Dialog onCreateDialog(Bundle savedInstanceState) {
226            final Bundle bundle = getArguments();
227            final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
228                    .setMessage(bundle.getString(EXTRA_MESSAGE))
229                    .setPositiveButton(android.R.string.ok, this)
230                    .setNegativeButton(android.R.string.cancel, null);
231            return builder.create();
232        }
233
234        @Override
235        public void onClick(DialogInterface dialog, int which) {
236            final Fragment fragment = getTargetFragment();
237            if (fragment instanceof DefaultAppPickerFragment) {
238                final Bundle bundle = getArguments();
239                ((DefaultAppPickerFragment) fragment).onRadioButtonConfirmed(
240                        bundle.getString(EXTRA_KEY));
241            }
242        }
243    }
244
245    @VisibleForTesting
246    public RadioButtonPreference configurePreferenceFromAppInfo(RadioButtonPreference pref,
247            String appKey, DefaultAppInfo info, String defaultAppKey, String systemDefaultAppKey) {
248        pref.setTitle(info.loadLabel(mPm.getPackageManager()));
249        pref.setIcon(info.loadIcon(mPm.getPackageManager()));
250        pref.setKey(appKey);
251        if (TextUtils.equals(defaultAppKey, appKey)) {
252            pref.setChecked(true);
253        }
254        if (TextUtils.equals(systemDefaultAppKey, appKey)) {
255            pref.setSummary(R.string.system_app);
256        } else if (!TextUtils.isEmpty(info.summary)) {
257            pref.setSummary(info.summary);
258        }
259        pref.setEnabled(info.enabled);
260        pref.setOnClickListener(this);
261        return pref;
262    }
263}
264