android4.1去除bluetooth和gps功能

   去除桌面bluetooth快捷键和设置里面gps功能开关。

一：Settings\src\com\android\settings\widget\SettingsAppWidgetProvider.java：

import android.view.View;

 static RemoteViews buildUpdate(Context context) {
        RemoteViews views = new RemoteViews(context.getPackageName(),
                R.layout.widget);
        //update the view when some feature is disable
        if(!context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_BLUETOOTH)){
            views.setViewVisibility(R.id.btn_bluetooth, View.GONE);
        }
        if(!context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_WIFI)){
            views.setViewVisibility(R.id.btn_wifi, View.GONE);
        }
        if(!context.getPackageManager().hasSystemFeature(PackageManager.FEATURE_LOCATION_GPS)){
            views.setViewVisibility(R.id.btn_gps, View.GONE);
        }

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｝

二：Settings\src\com\android\settings\LocationSettings.java：

 private PreferenceScreen createPreferenceHierarchy() {

--------------------------------------------------------------------------

 if(!getPackageManager().hasSystemFeature(PackageManager.FEATURE_LOCATION_GPS)){
            getPreferenceScreen().removePreference(mGps);
        }


        return root;
    }

二：frameworks\base\core\java\android\content\pm\PackageManager.java：

    public static final String FEATURE_BLUETOOTH = "android.hardware.bluetooth";

    public static final String FEATURE_LOCATION_GPS = "android.hardware.location.gps";

三：android/frameworks/native/data/etc/xxx.xml  TO  system/etc/permissons/：

android.hardware.bluetooth.xml

android.hardware.wifi.direct.xml

android.hardware.location.gps.xml

      添加了判断条件后，只要把相应的属性文件不要拷贝到system/etc/permissons/下面就OK了！