Android 7.1原生設定項删除

從源碼中看到Settings繼承SettingsActivity，而SettingsActivity繼承SettingsDrawerActivity，在SettingsDrawerActivity的onCreate方法中，我們看到調用了getDashboardCategories方法，代碼：

getDashboardCategories();//擷取設定項清單
        setActionBar(toolbar);
        mDrawerAdapter = new SettingsDrawerAdapter(this);
        ListView listView = (ListView) findViewById(R.id.left_drawer);
        listView.setAdapter(mDrawerAdapter);
        listView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            public void onItemClick(android.widget.AdapterView<?> parent, View view, int position,
                    long id) {
                onTileClicked(mDrawerAdapter.getTile(position));
            }
        });
           

跟進到該方法的具體實作：

public List<DashboardCategory> getDashboardCategories() {
        if (sDashboardCategories == null) {
            sTileCache = new HashMap<>();
            sConfigTracker = new InterestingConfigChanges();
            // Apply initial current config.
            boolean newC =sConfigTracker.applyNewConfig(getResources());
            Log.d(TAG, "newC = " + newC);
            sDashboardCategories = TileUtils.getCategories(this, sTileCache);//重點在這裡
        }
        return sDashboardCategories;
    }
           

跟進到getCategories方法：

private static final String EXTRA_SETTINGS_ACTION =
            "com.android.settings.action.EXTRA_SETTINGS";

    /**
     * Same as #EXTRA_SETTINGS_ACTION but used for the platform Settings activities.
     */
    private static final String SETTINGS_ACTION =
            "com.android.settings.action.SETTINGS";

    private static final String OPERATOR_SETTINGS =
            "com.android.settings.OPERATOR_APPLICATION_SETTING";

    private static final String OPERATOR_DEFAULT_CATEGORY =
            "com.android.settings.category.wireless";

    private static final String MANUFACTURER_SETTINGS =
            "com.android.settings.MANUFACTURER_APPLICATION_SETTING";

    private static final String MANUFACTURER_DEFAULT_CATEGORY =
            "com.android.settings.category.device";

//以上是TileUtils.java定義的常量

    public static List<DashboardCategory> getCategories(Context context,
            HashMap<Pair<String, String>, Tile> cache) {
        //......省略
        for (UserHandle user : userManager.getUserProfiles()) {
            // TODO: Needs much optimization, too many PM queries going on here.
            if (user.getIdentifier() == ActivityManager.getCurrentUser()) {
                // Only add Settings for this user.
                getTilesForAction(context, user, SETTINGS_ACTION, cache, null, tiles, true);
                getTilesForAction(context, user, OPERATOR_SETTINGS, cache,
                        OPERATOR_DEFAULT_CATEGORY, tiles, false);
                getTilesForAction(context, user, MANUFACTURER_SETTINGS, cache,
                        MANUFACTURER_DEFAULT_CATEGORY, tiles, false);
            }
            if (setup) {
                getTilesForAction(context, user, EXTRA_SETTINGS_ACTION, cache, null, tiles, false);
            }
        }
        //......省略
        return categories;
    }
           

到這裡我們就可以看得到，這是根據AndroidManifest.xml對activity及fragement的定義來劃分設定項分類的。我們再看一下AndroidManifest.xml對各個activity及fragment的定義，拿個簡單的來看看：

<activity android:name="Settings$AppMemoryUsageActivity"
                  android:label="@string/app_list_memory_use"
                  android:icon="@drawable/ic_settings_memory">
            <intent-filter>
                <action android:name="android.settings.APP_MEMORY_USAGE" />
                <category android:name="android.intent.category.DEFAULT" />
            </intent-filter>
            <!-- <meta-data android:name="com.android.settings.category"
                       android:value="com.android.settings.category.device" /> -->
            <meta-data android:name="com.android.settings.FRAGMENT_CLASS"
                       android:value="com.android.settings.applications.ProcessStatsUi" />
        </activity>
           

這裡我們隻要前設定項分類去掉就能夠删除掉這一設定項<meta-data android:name="com.android.settings.category" android:value="com.android.settings.category.device" />，同裡如果我們要增加設定項，隻要按不同的分類設定參數就行了。