I.MX6 Android 移除 Settings wifi功能

/*********************************************************************
 *              I.MX6 Android 移除 Settings wifi功能
 * 说明：
 *     本文主要记录如何修改Android Settings中的主选项，初衷是有些
 * 设置并不是我们需要，隐藏掉还是比较好的。
 * 
 *                                   2016-3-5 深圳 南山平山村 曾剑锋
 ********************************************************************/

参考文档：
    1. Android Settings开发之修改
        http://blog.csdn.net/wangjinyu501/article/details/22077803
    2. Android Settings和SettingsProvider源码分析与修改
        http://www.cncoders.net/article/11633/
    3. 何时使用 Preference Headers
        http://blog.csdn.net/ixiaobu/article/details/8609935

一、cat packages/apps/Settings/AndroidManifest.xml
    ......
    <!-- Settings -->

    <activity android:name="Settings"                                ------+   
            android:label="@string/settings_label_launcher"                |  
            android:taskAffinity="com.android.settings"                    |  
            android:launchMode="singleTask">                               |  
        <intent-filter>                                                    |     
            <action android:name="android.intent.action.MAIN" />           |     
            <action android:name="android.settings.SETTINGS" />            |      
            <category android:name="android.intent.category.DEFAULT" />    |      
            <category android:name="android.intent.category.LAUNCHER" />   |      
        </intent-filter>                                                   |        
    </activity>                                                            |  
    ......                                                                 |    
                                                                           |  
二、cat packages/apps/Settings/src/com/android/settings/Settings.java  <---+ 
    ......
     /**
     * Populate the activity with the top-level headers.
     */
    @Override
    public void onBuildHeaders(List<Header> headers) {
        loadHeadersFromResource(R.xml.settings_headers, headers);
                                           |            
        updateHeaderList(headers);         |        
    }                                      |            
    ......                                 |            
                                           V                
三、cat packages/apps/Settings/res/xml/settings_headers.xml
    ......
    <!-- Wifi -->
    <!--
    <header
        android:id="@+id/wifi_settings"
        android:fragment="com.android.settings.wifi.WifiSettings"
        android:title="@string/wifi_settings_title"
        android:icon="@drawable/ic_settings_wireless" />
    -->
    ......

四、error:
    1. error 1：
        1. 现象：
            ......
            make: Entering directory `/home/myzr/myandroid'
            target R.java/Manifest.java: Settings (out/target/common/obj/APPS/Settings_intermediates/src/R.stamp)
            /home/myzr/myandroid/packages/apps/Settings/AndroidManifest.xml:138: error: Error: No resource found that matches the given name (at 'resource' with value '@id/wifi_settings').
            /home/myzr/myandroid/packages/apps/Settings/AndroidManifest.xml:151: error: Error: No resource found that matches the given name (at 'resource' with value '@id/wifi_settings').
            /home/myzr/myandroid/packages/apps/Settings/AndroidManifest.xml:197: error: Error: No resource found that matches the given name (at 'resource' with value '@id/wifi_settings').
            make: *** [out/target/common/obj/APPS/Settings_intermediates/src/R.stamp] Error 1
            make: Leaving directory `/home/myzr/myandroid'

        2. 解决办法：
            cat packages/apps/Settings/AndroidManifest.xml
                ......
                <!-- Top-level settings -->
            
                <!--
                <activity android:name="Settings$WifiSettingsActivity"
                        android:taskAffinity=""
                        android:label="@string/wifi_settings"
                        android:configChanges="orientation|keyboardHidden|screenSize"
                        android:excludeFromRecents="true">
                    <intent-filter>
                        <action android:name="android.intent.action.MAIN" />
                        <action android:name="android.settings.WIFI_SETTINGS" />
                        <category android:name="android.intent.category.DEFAULT" />
                        <category android:name="android.intent.category.VOICE_LAUNCH" />
                        <category android:name="com.android.settings.SHORTCUT" />
                    </intent-filter>
                    <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
                        android:value="com.android.settings.wifi.WifiSettings" />
                    <meta-data android:name="com.android.settings.TOP_LEVEL_HEADER_ID"
                        android:resource="@id/wifi_settings" />
                </activity>
                -->
            
                <!-- Keep compatibility with old shortcuts. -->
                <!--
                <activity-alias android:name=".wifi.WifiSettings"
                        android:taskAffinity="com.android.settings"
                        android:label="@string/wifi_settings"
                        android:targetActivity="Settings$WifiSettingsActivity"
                        android:configChanges="orientation|keyboardHidden|screenSize"
                        android:exported="true">
                    <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
                        android:value="com.android.settings.wifi.WifiSettings" />
                    <meta-data android:name="com.android.settings.TOP_LEVEL_HEADER_ID"
                        android:resource="@id/wifi_settings" />
                </activity-alias>
            
                <activity android:name=".wifi.WifiPickerActivity"
                        android:taskAffinity="com.android.settings"
                        android:parentActivityName="Settings">
                    <intent-filter>
                        <action android:name="android.intent.action.MAIN" />
                        <action android:name="android.net.wifi.PICK_WIFI_NETWORK" />
                        <category android:name="android.intent.category.DEFAULT" />
                    </intent-filter>
                </activity>
            
                <activity android:name=".wifi.WifiSetupActivity"
                    android:theme="@style/setup_wizard_theme"
                    android:label="@string/wifi_setup_wizard_title"
                        android:icon="@drawable/empty_icon"
                    android:clearTaskOnLaunch="true">
                    <intent-filter>
                        <action android:name="android.intent.action.MAIN" />
                        <action android:name="com.android.net.wifi.SETUP_WIFI_NETWORK" />
                        <category android:name="android.intent.category.DEFAULT" />
                    </intent-filter>
                </activity>
            
                <activity android:name=".wifi.WifiSettingsForSetupWizardXL"
                          android:theme="@android:style/Theme.Holo.NoActionBar"
                          android:screenOrientation="behind"
                          android:clearTaskOnLaunch="true"
                          android:windowSoftInputMode="adjustResize"
                          android:exported="true" />
            
                <activity android:name="Settings$AdvancedWifiSettingsActivity"
                        android:taskAffinity="com.android.settings"
                        android:label="@string/wifi_advanced_settings_label"
                        android:configChanges="orientation|keyboardHidden|screenSize"
                        android:parentActivityName="Settings$WifiSettingsActivity">
                    <intent-filter>
                        <action android:name="android.intent.action.MAIN" />
                        <action android:name="android.settings.WIFI_IP_SETTINGS" />
                        <category android:name="android.intent.category.VOICE_LAUNCH" />
                        <category android:name="android.intent.category.DEFAULT" />
                    </intent-filter>
                    <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
                        android:value="com.android.settings.wifi.AdvancedWifiSettings" />
                    <meta-data android:name="com.android.settings.TOP_LEVEL_HEADER_ID"
                        android:resource="@id/wifi_settings" />
                    <meta-data android:name="com.android.settings.PARENT_FRAGMENT_TITLE"
                        android:resource="@string/wifi_settings" />
                    <meta-data android:name="com.android.settings.PARENT_FRAGMENT_CLASS"
                        android:value="com.android.settings.Settings$WifiSettingsActivity" />
                </activity>
                -->
                ......


    2. error 2:
        1. 现象：
            ......
            No private recovery resources for TARGET_DEVICE sabresd_6dq
            make: Entering directory `/home/myzr/myandroid'
            target R.java/Manifest.java: Settings (out/target/common/obj/APPS/Settings_intermediates/src/R.stamp)
                (skipping file '.settings_headers.xml.swp' due to ANDROID_AAPT_IGNORE pattern '.*')
            target Java: Settings (out/target/common/obj/APPS/Settings_intermediates/classes)
            /home/myzr/myandroid/packages/apps/Settings/src/com/android/settings/Settings.java:431: cannot find symbol
            symbol  : variable wifi_settings
            location: class com.android.settings.R.id
                        } else if (id == R.id.wifi_settings) {
                                             ^
            /home/myzr/myandroid/packages/apps/Settings/src/com/android/settings/Settings.java:602: cannot find symbol
            symbol  : variable wifi_settings
            location: class com.android.settings.R.id
                        } else if (header.id == R.id.wifi_settings || header.id == R.id.bluetooth_settings) {
                                                    ^
            /home/myzr/myandroid/packages/apps/Settings/src/com/android/settings/Settings.java:700: cannot find symbol
            symbol  : variable wifi_settings
            location: class com.android.settings.R.id
                                if (header.id == R.id.wifi_settings) {
                                                     ^
            Note: Some input files use or override a deprecated API.
            Note: Recompile with -Xlint:deprecation for details.
            Note: Some input files use unchecked or unsafe operations.
            Note: Recompile with -Xlint:unchecked for details.
            3 errors
            make: *** [out/target/common/obj/APPS/Settings_intermediates/classes-full-debug.jar] Error 41
            make: Leaving directory `/home/myzr/myandroid'

        2. 解决办法：
            cat packages/apps/Settings/src/com/android/settings/Settings.java
                ......
                // Show only these settings for restricted users
                private int[] SETTINGS_FOR_RESTRICTED = {
                        R.id.wireless_section,
                        //R.id.wifi_settings,
                        R.id.bluetooth_settings,
                        R.id.data_usage_settings,
                        R.id.wireless_settings,
                        R.id.device_section,
                        R.id.sound_settings,
                        R.id.display_settings,
                        R.id.storage_settings,
                        R.id.application_settings,
                        R.id.battery_settings,
                        R.id.personal_section,
                        R.id.location_settings,
                        R.id.security_settings,
                        R.id.language_settings,
                        R.id.user_settings,
                        R.id.account_settings,
                        R.id.account_add,
                        R.id.system_section,
                        R.id.date_time_settings,
                        R.id.about_settings,
                        R.id.accessibility_settings
                }
                ......
                private void updateHeaderList(List<Header> target) {
                    while (i < target.size()) {
                    Header header = target.get(i);
                    // Ids are integers, so downcasting
                    int id = (int) header.id;
                    if (id == R.id.operator_settings || id == R.id.manufacturer_settings) {
                        Utils.updateHeaderToSpecificActivityFromMetaDataOrRemove(this, target, header);
                    } 
                    /** annotation this part
                        else if (id == R.id.wifi_settings) {
                            // Remove WiFi Settings if WiFi service is not available.
                            if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI)) {
                                target.remove(i);
                            }
                        } 
                    */
                    else if (id == R.id.bluetooth_settings) {
                        // Remove Bluetooth Settings if Bluetooth service is not available.
                        if (!getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)) {
                            target.remove(i);
                        }
                    } else if (id == R.id.data_usage_settings) {
                        ......
                    ......
                }
                ......
                private static class HeaderAdapter extends ArrayAdapter<Header> {
                    ......
                    static int getHeaderType(Header header) {
                        if (header.fragment == null && header.intent == null) {
                            return HEADER_TYPE_CATEGORY;
                        } else if (
                            /** annotation this part
                                header.id == R.id.wifi_settings ||
                            */ 
                                header.id == R.id.bluetooth_settings) {
                            return HEADER_TYPE_SWITCH;
                        } else {
                            return HEADER_TYPE_NORMAL;
                        }
                    }
                    ......
                }
                ......
                @Override
                public View getView(int position, View convertView, ViewGroup parent) {
                    ......
                    // All view fields must be updated every time, because the view may be recycled
                    switch (headerType) {
                        case HEADER_TYPE_CATEGORY:
                            holder.title.setText(header.getTitle(getContext().getResources()));
                            break;
            
                        case HEADER_TYPE_SWITCH:
                            // Would need a different treatment if the main menu had more switches
                            /** annotation this part
                                if (header.id == R.id.wifi_settings) {
                                    mWifiEnabler.setSwitch(holder.switch_);
                                } else {
                            */
                                mBluetoothEnabler.setSwitch(holder.switch_);
                            /*
                                }
                            */
                            // No break, fall through on purpose to update common fields
            
                            //$FALL-THROUGH$
                        case HEADER_TYPE_NORMAL:
                            if (header.extras != null
                                    && header.extras.containsKey(ManageAccountsSettings.KEY_ACCOUNT_TYPE)) {
                                String accType = header.extras.getString(
                                        ManageAccountsSettings.KEY_ACCOUNT_TYPE);
                                ViewGroup.LayoutParams lp = holder.icon.getLayoutParams();
                                lp.width = getContext().getResources().getDimensionPixelSize(
                                        R.dimen.header_icon_width);
                                lp.height = lp.width;
                                holder.icon.setLayoutParams(lp);
                                Drawable icon = mAuthHelper.getDrawableForType(getContext(), accType);
                                holder.icon.setImageDrawable(icon);
                            } else {
                                holder.icon.setImageResource(header.iconRes);
                            }
                            holder.title.setText(header.getTitle(getContext().getResources()));
                            CharSequence summary = header.getSummary(getContext().getResources());
                            if (!TextUtils.isEmpty(summary)) {
                                holder.summary.setVisibility(View.VISIBLE);
                                holder.summary.setText(summary);
                            } else {
                                holder.summary.setVisibility(View.GONE);
                            }
                            break;
                    }
                    ......
                }
                ......