UsbSettings.java revision 02900a12b11efc89057fc5d0a19c08d20ff8d2c1 
1/*
2 * Copyright (C) 2011 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.deviceinfo;
18
19import android.content.ContentQueryMap;
20import android.content.ContentResolver;
21import android.content.Context;
22import android.hardware.usb.UsbManager;
23import android.os.Bundle;
24import android.os.storage.StorageManager;
25import android.os.storage.StorageVolume;
26import android.preference.CheckBoxPreference;
27import android.preference.Preference;
28import android.preference.PreferenceScreen;
29import android.provider.Settings;
30import android.util.Log;
31import android.view.Menu;
32import android.view.MenuInflater;
33import android.view.MenuItem;
34
35import com.android.settings.R;
36import com.android.settings.SettingsPreferenceFragment;
37
38import java.io.File;
39
40/**
41 * USB storage settings.
42 */
43public class UsbSettings extends SettingsPreferenceFragment {
44
45    private static final String TAG = "UsbSettings";
46
47    private static final String KEY_MTP = "usb_mtp";
48    private static final String KEY_PTP = "usb_ptp";
49    private static final String KEY_INSTALLER_CD = "usb_installer_cd";
50    private static final int MENU_ID_INSTALLER_CD = Menu.FIRST;
51
52    private UsbManager mUsbManager;
53    private String mInstallerImagePath;
54    private CheckBoxPreference mMtp;
55    private CheckBoxPreference mPtp;
56
57    private PreferenceScreen createPreferenceHierarchy() {
58        PreferenceScreen root = getPreferenceScreen();
59        if (root != null) {
60            root.removeAll();
61        }
62        addPreferencesFromResource(R.xml.usb_settings);
63        root = getPreferenceScreen();
64
65        mMtp = (CheckBoxPreference)root.findPreference(KEY_MTP);
66        mPtp = (CheckBoxPreference)root.findPreference(KEY_PTP);
67
68        return root;
69    }
70
71    @Override
72    public void onCreate(Bundle icicle) {
73        super.onCreate(icicle);
74        mUsbManager = (UsbManager)getSystemService(Context.USB_SERVICE);
75        mInstallerImagePath = getString(com.android.internal.R.string.config_isoImagePath);
76        if (!(new File(mInstallerImagePath)).exists()) {
77            mInstallerImagePath = null;
78        }
79        setHasOptionsMenu(mInstallerImagePath != null);
80    }
81
82    @Override
83    public void onResume() {
84        super.onResume();
85
86        // Make sure we reload the preference hierarchy since some of these settings
87        // depend on others...
88        createPreferenceHierarchy();
89        updateToggles();
90    }
91
92    private void updateToggles() {
93        if (mUsbManager.isFunctionEnabled(UsbManager.USB_FUNCTION_MTP)) {
94            mMtp.setChecked(true);
95            mPtp.setChecked(false);
96        } else if (mUsbManager.isFunctionEnabled(UsbManager.USB_FUNCTION_PTP)) {
97            mMtp.setChecked(false);
98            mPtp.setChecked(true);
99        } else  {
100            mMtp.setChecked(false);
101            mPtp.setChecked(false);
102        }
103    }
104
105    @Override
106    public boolean onPreferenceTreeClick(PreferenceScreen preferenceScreen, Preference preference) {
107        Log.d(TAG, "onPreferenceTreeClick " + preference);
108
109        // temporary hack - using check boxes as radio buttons
110        // don't allow unchecking them
111        if (preference instanceof CheckBoxPreference) {
112            CheckBoxPreference checkBox = (CheckBoxPreference)preference;
113            if (!checkBox.isChecked()) {
114                checkBox.setChecked(true);
115                return true;
116            }
117        }
118
119        if (preference == mMtp) {
120            mUsbManager.setCurrentFunction(UsbManager.USB_FUNCTION_MTP, true);
121            mPtp.setChecked(false);
122        } else if (preference == mPtp) {
123            mUsbManager.setCurrentFunction(UsbManager.USB_FUNCTION_PTP, true);
124            mMtp.setChecked(false);
125        }
126
127        return true;
128    }
129
130    @Override
131    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {
132        menu.add(Menu.NONE, MENU_ID_INSTALLER_CD, 0, R.string.usb_label_installer_cd)
133                //.setIcon(com.android.internal.R.drawable.stat_sys_data_usb)
134                .setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
135    }
136
137    @Override
138    public boolean onOptionsItemSelected(MenuItem item) {
139        switch (item.getItemId()) {
140            case MENU_ID_INSTALLER_CD:
141                // installer CD is never default
142                mUsbManager.setCurrentFunction(UsbManager.USB_FUNCTION_MASS_STORAGE, false);
143                mUsbManager.setMassStorageBackingFile(mInstallerImagePath);
144                mMtp.setChecked(false);
145                mPtp.setChecked(false);
146                return true;
147        }
148        return super.onOptionsItemSelected(item);
149    }
150}
151