平台：RK3288
版本：Android5.1
需要修改的文件有以下几个
packages/apps/Settings/res/xml/dashboard_categories.xml
packages/apps/Settings/res/xml/nobar_switch.xml
packages/apps/Settings/src/com/android/settings/NaBarSetting.java
frameworks/base/packages/SystemUI/res/values-zh-rCN/strings.xml
frameworks/base/packages/SystemUI/res/values/strings.xml
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
1、dashboard_categories.xml
packages/apps/Settings/res/xml/dashboard_categories.xml
Setting中显示内容的条目数量是由资源数量决定的，即要有多少资源才能显示多少个视图。而这个资源就定义在dashboard_categories.xml中
....
/>
2、nobar_switch.xml
packages/apps/Settings/res/xml/nobar_switch.xml
NaBarSetting界面的布局
3、创建NaBarSetting.java
packages/apps/Settings/src/com/android/settings/NaBarSetting.java
NaBarSetting.java是一个fragment，开关界面和逻辑操作都在这里，设置了两个广播用于让PhoneStatusBar接收，然后开关NavigationBar。
具体代码如下：
package com.android.settings;
import java.util.Timer;
import java.util.TimerTask;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.pm.PackageManager;
import android.content.pm.ResolveInfo;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.net.Uri;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.preference.CheckBoxPreference;
import android.preference.ListPreference;
import android.preference.Preference;
import android.preference.PreferenceGroup;
import android.preference.PreferenceScreen;
import android.provider.MediaStore;
import android.provider.Settings;
import android.provider.MediaStore.Images.Media;
import android.provider.Settings.SettingNotFoundException;
import java.io.File;
import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import android.util.Log;
import android.hardware.usb.UsbManager;
import java.util.List;
import android.os.SystemProperties;
public class NaBarSetting extends SettingsPreferenceFragment implements
Preference.OnPreferenceChangeListener {
private static final String TAG = "NaBarSettings";
private CheckBoxPreference mEnableNabar;
private File mFile = null;
private String mMode = null;
private static final String HOST_MODE = new String("1");
private static final String SLAVE_MODE = new String("2");
private static String ENABLE_NABAR_SWITCH = "enable.nabar.switch";
private Context mContext;
private Handler mHandler;
private static final String KEY_ENABLE_NABAR = "enable_nabar";、
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
addPreferencesFromResource(R.xml.nabar_switch);
mEnableNabar = (CheckBoxPreference) findPreference(KEY_ENABLE_NABAR);
mEnableNabar.setOnPreferenceChangeListener(this);
mContext=getActivity();
}
@Override
public void onResume() {
super.onResume();
mEnableNabar.setEnabled(true);
String enableUms= SystemProperties.get(ENABLE_NABAR_SWITCH,"true");
if("true".equals(enableUms))//if has UMS function,flash is primary storage
{
mEnableNabar.setChecked(true);
}else{
mEnableNabar.setChecked(false);
}
}
@Override
public void onDestroy() {
// TODO Auto-generated method stub
super.onDestroy();
try {
getActivity().unregisterReceiver(mReceiver);
}catch (Exception e){
Log.e(TAG,"unregisterReceiver Ex:"+e);
}
}
public boolean onPreferenceChange(Preference preference, Object objValue) {
final String key = preference.getKey();
if (KEY_ENABLE_NABAR.equals(key)) {
if((Boolean) objValue == true) {
mEnableNabar.setChecked(true);
SystemProperties.set(ENABLE_NABAR_SWITCH, "true");
Intent intent=new Intent();
//开启导航栏广播
intent.setAction("rk.android.navbarview.SHOW");
mContext.sendBroadcast(intent);
} else {
mEnableNabar.setChecked(false);
SystemProperties.set(ENABLE_NABAR_SWITCH, "false");
Intent intent=new Intent();
//关闭导航栏广播
intent.setAction("rk.android.navbarview.HIDE");
mContext.sendBroadcast(intent);
}
}
return true;
}
}
4.strings.xml
frameworks/base/packages/SystemUI/res/values-zh-rCN/strings.xml
frameworks/base/packages/SystemUI/res/values/strings.xml
/values-zh-rCN/strings.xml
NavigationBar Settings
Show NavigationBar
values/strings.xml
导航栏设置
显示导航栏
5.PhoneStatusBar.java
frameworks/base/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
广播监听receiver加入隐藏导航栏广播监听
private BroadcastReceiver receiver=new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
......
}else if(action.equals("rk.android.navbarview.HIDE")){
removeBar();
}else{
takeScreenshot();
}
.......
};
makeStatusBarView方法内加入广播注册
.....
IntentFilter intentfilter=new IntentFilter();
intentfilter.addAction("rk.android.screenshot.SHOW");
intentfilter.addAction("rk.android.screenshot.ACTION");
//cyh add
intentfilter.addAction("rk.android.navbarview.HIDE");
//cyh end
context.registerReceiver(receiver, intentfilter);
.....
添加移除导航栏的方法removeBar和增加导航栏的方法addBar()
boolean mBarIsAdd = true;
public void addBar(){
if (!mBarIsAdd){
Log.d(TAG,"add Bar");
SystemProperties.set(ENABLE_NABAR_SWITCH, "true");
try {
boolean showNav = mWindowManagerService.hasNavigationBar();
if (DEBUG) Log.v(TAG, "hasNavigationBar=" + showNav);
if (showNav) {
mNavigationBarView =
(NavigationBarView) View.inflate(mContext, R.layout.navigation_bar_win, null);
}else{
mNavigationBarView =
(NavigationBarView) View.inflate(mContext, R.layout.navigation_bar, null);
}
mNavigationBarView.setDisabledFlags(mDisabled);
mNavigationBarView.setBar(this);
mNavigationBarView.setOnVerticalChangedListener(
new NavigationBarView.OnVerticalChangedListener() {
@Override
public void onVerticalChanged(boolean isVertical) {
if (mSearchPanelView != null) {
mSearchPanelView.setHorizontal(isVertical);
}
mNotificationPanel.setQsScrimEnabled(!isVertical);
}
});
mNavigationBarView.setOnTouchListener(new View.OnTouchListener() {
@Override
public boolean onTouch(View v, MotionEvent event) {
checkUserAutohide(v, event);
return false;
}});
}
} catch (RemoteException ex) {
}
addNavigationBar();
updateNotifications();
checkBarModes();
mBarIsAdd = true;
}
}
private void removeBar(){
if (mBarIsAdd){
Log.d(TAG,"remove Bar");
if (mNavigationBarView != null){
mWindowManager.removeViewImmediate(mNavigationBarView);
};
if(signalCluster_win!=null)
signalCluster_win=null;
if (mNavigationBarView != null)
mNavigationBarView = null;
if(mNotificationLite != null){
mNotificationLite.closeCenter();
}
mBarIsAdd = false;
SystemProperties.set(ENABLE_NABAR_SWITCH, "false");
}
}
6.PhoneWindowManager.java
frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java
注册广播
public void init(Context context, IWindowManager windowManager,
WindowManagerFuncs windowManagerFuncs) {
......
context.registerReceiver(mScreenshotReceiver, intentfilter);
//cyh add register for navigationbar
IntentFilter statubarintentfilter=new IntentFilter();
statubarintentfilter.addAction("rk.android.navbarview.SHOW");
context.registerReceiver(mStatuBarReceiver, statubarintentfilter);
//cyh end
加入Receiver 和 addBar方法
private BroadcastReceiver mStatuBarReceiver=new BroadcastReceiver() {
@Override
public void onReceive(Context context, Intent intent) {
if (mNavigationBar != null && mNavigationBarOnBottom) {
requestTransientBars(mNavigationBar);
}
addBar();
}
};
public void addBar() {
try {
IStatusBarService statusbar = getStatusBarService();
if (statusbar != null) {
statusbar.addBar();
}
} catch (RemoteException e) {
Slog.e(TAG, "RemoteException when add Bar", e);
// re-acquire status bar service next time it is needed.
mStatusBarService = null;
}
}