DefaultAppPickerFragment.java revision f8f55e574dbf03688d5d9b28bed0dd3802167fe5 
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<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            final RadioButtonPreference pref = new RadioButtonPreference(getPrefContext());
120            final String appKey = app.getKey();
121            final DefaultAppInfo info = app.getValue();
122            pref.setTitle(info.loadLabel(mPm.getPackageManager()));
123            pref.setIcon(info.loadIcon(mPm.getPackageManager()));
124            pref.setKey(appKey);
125            if (TextUtils.equals(defaultAppKey, appKey)) {
126                pref.setChecked(true);
127            }
128            if (TextUtils.equals(systemDefaultAppKey, appKey)) {
129                pref.setSummary(R.string.system_app);
130            } else if (!TextUtils.isEmpty(info.summary)) {
131                pref.setSummary(info.summary);
132            }
133            if (!TextUtils.isEmpty(app.getValue().disabledDescription)) {
134                pref.setEnabled(false);
135                pref.setSummary(app.getValue().disabledDescription);
136            }
137            pref.setOnClickListener(this);
138            screen.addPreference(pref);
139        }
140        mayCheckOnlyRadioButton();
141    }
142
143    @Override
144    public void onRadioButtonClicked(RadioButtonPreference selected) {
145        final String selectedKey = selected.getKey();
146        final String confirmationMessage = getConfirmationMessage(mCandidates.get(selectedKey));
147        final Activity activity = getActivity();
148        if (TextUtils.isEmpty(confirmationMessage)) {
149            onRadioButtonConfirmed(selectedKey);
150        } else if (activity != null) {
151            final DialogFragment fragment = ConfirmationDialogFragment.newInstance(
152                    this, selectedKey, confirmationMessage);
153            fragment.show(activity.getFragmentManager(), ConfirmationDialogFragment.TAG);
154        }
155    }
156
157    private void onRadioButtonConfirmed(String selectedKey) {
158        final boolean success = setDefaultAppKey(selectedKey);
159        if (success) {
160            updateCheckedState(selectedKey);
161        }
162        onSelectionPerformed(success);
163    }
164
165    @VisibleForTesting
166    public void updateCheckedState(String selectedKey) {
167        final PreferenceScreen screen = getPreferenceScreen();
168        if (screen != null) {
169            final int count = screen.getPreferenceCount();
170            for (int i = 0; i < count; i++) {
171                final Preference pref = screen.getPreference(i);
172                if (pref instanceof RadioButtonPreference) {
173                    final RadioButtonPreference radioPref = (RadioButtonPreference) pref;
174                    final boolean newCheckedState = TextUtils.equals(pref.getKey(), selectedKey);
175                    if (radioPref.isChecked() != newCheckedState) {
176                        radioPref.setChecked(TextUtils.equals(pref.getKey(), selectedKey));
177                    }
178                }
179            }
180        }
181    }
182
183    @VisibleForTesting(otherwise = VisibleForTesting.PRIVATE)
184    void mayCheckOnlyRadioButton() {
185        final PreferenceScreen screen = getPreferenceScreen();
186        // If there is only 1 thing on screen, select it.
187        if (screen != null && screen.getPreferenceCount() == 1) {
188            final Preference onlyPref = screen.getPreference(0);
189            if (onlyPref instanceof RadioButtonPreference) {
190                ((RadioButtonPreference) onlyPref).setChecked(true);
191            }
192        }
193    }
194
195    protected boolean shouldShowItemNone() {
196        return false;
197    }
198
199    protected String getSystemDefaultAppKey() {
200        return null;
201    }
202
203    protected abstract List<DefaultAppInfo> getCandidates();
204
205    protected abstract String getDefaultAppKey();
206
207    protected abstract boolean setDefaultAppKey(String key);
208
209    // Called after the user tries to select an item.
210    protected void onSelectionPerformed(boolean success) {}
211
212    protected String getConfirmationMessage(DefaultAppInfo appInfo) {
213        return null;
214    }
215
216    public static class ConfirmationDialogFragment extends InstrumentedDialogFragment
217            implements DialogInterface.OnClickListener {
218
219        public static final String TAG = "DefaultAppConfirm";
220        public static final String EXTRA_KEY = "extra_key";
221        public static final String EXTRA_MESSAGE = "extra_message";
222
223        @Override
224        public int getMetricsCategory() {
225            return MetricsProto.MetricsEvent.DEFAULT_APP_PICKER_CONFIRMATION_DIALOG;
226        }
227
228        public static ConfirmationDialogFragment newInstance(DefaultAppPickerFragment parent,
229                String key, String message) {
230            final ConfirmationDialogFragment fragment = new ConfirmationDialogFragment();
231            final Bundle argument = new Bundle();
232            argument.putString(EXTRA_KEY, key);
233            argument.putString(EXTRA_MESSAGE, message);
234            fragment.setArguments(argument);
235            fragment.setTargetFragment(parent, 0);
236            return fragment;
237        }
238
239        @Override
240        public Dialog onCreateDialog(Bundle savedInstanceState) {
241            final Bundle bundle = getArguments();
242            final AlertDialog.Builder builder = new AlertDialog.Builder(getActivity())
243                    .setMessage(bundle.getString(EXTRA_MESSAGE))
244                    .setPositiveButton(android.R.string.ok, this)
245                    .setNegativeButton(android.R.string.cancel, null);
246            return builder.create();
247        }
248
249        @Override
250        public void onClick(DialogInterface dialog, int which) {
251            final Fragment fragment = getTargetFragment();
252            if (fragment instanceof DefaultAppPickerFragment) {
253                final Bundle bundle = getArguments();
254                ((DefaultAppPickerFragment) fragment).onRadioButtonConfirmed(
255                        bundle.getString(EXTRA_KEY));
256            }
257        }
258    }
259
260}
261