Android SystemUI相关定制（三）

底部导航栏：

1.隐藏底部导航栏

 ——————————————————————————————————————————

2.导航栏动态隐藏、显示

1、frameworks/base/core/java/android/content/Intent.java文件，在文件末尾插入如下代码：

2、

frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/StatusBar.java中添加过滤广播

3、在广播mBroadcastReceiver中添加判断项

private void setSystemBarVisibility(int visibility) {

        if (DEBUG) Log.v(TAG, "setSystemBarVisibility: " + visibility);

        if (visibility == View.GONE && mNavigationBarView != null) {

            try {

                mWindowManager.removeViewImmediate(mNavigationBarView);

                Settings.System.putInt(mContext.getContentResolver(), Settings.System.SYSTEM_BAR_DISPLAY , 0);

Log.d("daibin","statusbar setSystemBarVisibility gone"); 

            } catch (IllegalArgumentException e) {

                Log.w(TAG, "IllegalArgumentException: " + e);

            }

            mNavigationBarView = null;

        } else if (visibility == View.VISIBLE && mNavigationBarView == null) {

            try {

                createNavigationBar();

                Settings.System.putInt(mContext.getContentResolver(), Settings.System.SYSTEM_BAR_DISPLAY , 1);

Log.d("daibin","statusbar setSystemBarVisibility visibility"); 

            } catch (WindowManager.BadTokenException e) {

                // ignore

                Log.w(TAG, "BadTokenException: " + e.getMessage());

            } catch (RuntimeException e) {

                // don't crash if something else bad happens, for example a

                // failure loading resources because we are loading from an app

                // on external storage that has been unmounted.

                Log.w(TAG, "RuntimeException: " + e);

            }

        }

    }

4、系统设置添加导航栏隐藏、显示功能

 （1）找到packages/apps/Settings/res/values-zh-rCN/strings.xml文件，插入以下代码：

<!-- System Bar settings title-->

    <string name="system_bar_settings_title">系统栏显示</string>

    <!-- System Bar settings summary-->

    <string name="system_bar_settings_summary">控制系统栏显示或隐藏</string>

    （2）找到apps/Settings/res/values/strings.xml文件，插入以下代码：

<!-- System Bar settings title-->

    <string name="system_bar_settings_title">System Bar Display</string>

    <!-- System Bar settings summary-->

    <string name="system_bar_settings_summary">Control System Bar show or hide</string>

  （3）找到packages/apps/Settings/res/xml/display_settings.xml文件，插入以下代码：

<SwitchPreference

    android:key="navigation_bar"

    android:title="@string/system_bar_settings_title"

    android:summary="@string/system_bar_settings_summary"

    android:persistent="false" />

注意：SwitchPreference放置的位置决定了显示的位置

5、找到frameworks/base/core/java/android/provider/Settings.java，添加以下内容

 

6、新建导航栏隐藏、显示控制类

位置：packages/apps/Settings/src/com/android/settings/display/

public class NavigationBarDisplayController extends AbstractPreferenceController

        implements PreferenceControllerMixin, Preference.OnPreferenceChangeListener {



    private static final String KEY_NAVIGATION_DISPLAY = "navigation_bar";



    private Preference mPreference;

    private Context mContext;



    public NavigationBarDisplayController(Context context) {

        super(context);

        mContext = context;



        IntentFilter filter = new IntentFilter();

        filter.addAction(Intent.ACTION_SYSTEM_BAR_SHOW);

        filter.addAction(Intent.ACTION_SYSTEM_BAR_HIDE);

        mContext.registerReceiverAsUser(mBroadcastReceiver, UserHandle.ALL, filter, null, null);

    }



    private final BroadcastReceiver mBroadcastReceiver = new BroadcastReceiver() {

        @Override

        public void onReceive(Context context, Intent intent) {

            String action = intent.getAction();

            if (Intent.ACTION_SYSTEM_BAR_SHOW.equals(action)) {

                if (mPreference != null)

                    ((SwitchPreference) mPreference).setChecked(true);

            } else if (Intent.ACTION_SYSTEM_BAR_HIDE.equals(action)) {

                if (mPreference != null)

                    ((SwitchPreference) mPreference).setChecked(false);

            }

        }

    };



    @Override

    public boolean isAvailable() {

        return true;

    }



    @Override

    public String getPreferenceKey() {

        return KEY_NAVIGATION_DISPLAY;

    }



    @Override

    public boolean onPreferenceChange(Preference preference, Object newValue) {

        if (mPreference == null) mPreference = preference;

        boolean value = (Boolean) newValue;

        mContext.sendBroadcast(new Intent(value ? Intent.ACTION_SYSTEM_BAR_SHOW : Intent.ACTION_SYSTEM_BAR_HIDE));

        Log.d("daibin", "onPreferenceChange putInt");

        //Settings.System.putInt(mContext.getContentResolver(), Settings.System.SYSTEM_BAR_DISPLAY, value ? 1 : 0);

        return true;

    }



    @Override

    public void updateState(Preference preference) {

        super.updateState(preference);

        if (mPreference == null) mPreference = preference;

        // update navigation bar

        int value = Settings.System.getInt(mContext.getContentResolver(), Settings.System.SYSTEM_BAR_DISPLAY, 1);

        ((SwitchPreference) preference).setChecked(value == 1);

    }

}

注意：getPreferenceKey()要和布局中的SwitchPreference的key对应起来

7、找到

packages/apps/Settings/src/com/android/settings/DisplaySettings.java添加以下内容

 

8、用法：

// 显示

adb shell am broadcast -a android.intent.action.SYSTEM_BAR_SHOW

// 隐藏

adb shell am broadcast -a android.intent.action.SYSTEM_BAR_HIDE

或者

// 显示

Intent intent = new Intent();

intent.setAction("android.intent.action.SYSTEM_BAR_SHOW");

sendBroadcast(intent);

// 隐藏

Intent intent = new Intent();

intent.setAction("android.intent.action.SYSTEM_BAR_HIDE");

sendBroadcast(intent);