Android禁止状态栏下拉 4.4

简介

项目需求APP全屏时,要禁止状态栏的下拉,这个应该是一个普遍的需求了吧,但android系统没有直接提供给普通APP直接调用的接口。那么我们只能自己想办法增加接口去实现该功能了。

具体实现方法

1. 修改SystemUI

路径:==/frameworks/base/packages/SystemUI//src/com/android/systemui/statusbar/phone/PhoneStatusBar.java==
通过在PhoneStatusBar.java类中注册一个广播的方式来实现状态栏的禁用和解除,其核心方法就是调用了disable()方法。disable()是SystemUI自定义的方法,感兴趣的同学可以去看其具体实现。

下面来看下我们在SystemUI中的具体实现代码:

@@ -494,6 +494,31 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode {
                                                                                                                        }

+       //add steven zhang by 20160701
+       private BroadcastReceiver mStatusShowHide = new BroadcastReceiver() {
+
+               @Override
+               public void onReceive(final Context context, Intent intent) {
+                       // TODO Auto-generated method stub
+                       String action = intent.getAction();
+                       
+                       if ("com.aura.statusbar.SHOW_OR_HIDE".equals(action)) {
+                               //  StatusBarManager.DISABLE_NONE
+                               //  StatusBarManager.DISABLE_EXPAND
+                               final int mode = intent.getIntExtra("mode", StatusBarManager.DISABLE_NONE);
+                               if (mNavigationBarView != null) {
+                                       mHandler.post(new Runnable() {
+                                               
+                                               @Override
+                                               public void run() {
+                                                       
+                                                       disable(mode);
+                                               }
+                                       });
+                               }
+                       } 
+               }
+       };
         //micheal add the Broadcast interface for  Control the wifi sleep mode change begin 20150514
         private BroadcastReceiver wifiSleepModeChangeReceiver = new BroadcastReceiver(){
             @Override
@@ -519,6 +544,10 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode {
     // ================================================================================
     protected PhoneStatusBarView makeStatusBarView() {
         final Context context = mContext;
+               // add steven zhang by 20160701
+               IntentFilter statusFilter = new IntentFilter();
+               statusFilter.addAction("com.aura.statusbar.SHOW_OR_HIDE");
+               context.registerReceiver(mStatusShowHide, statusFilter);

既然显示隐藏的广播我们已经注册好了,那么看下我们在APP中的具体调用吧。

    @Override
    protected void onResume() {
        super.onResume();
        Intent i = new Intent("com.aura.statusbar.SHOW_OR_HIDE");
        i.putExtra("mode", StatusBarManager.DISABLE_EXPAND);
        sendBroadcast(i);
    }

    @Override
    protected void onPause() {
        super.onPause();
        Intent i = new Intent("com.aura.statusbar.SHOW_OR_HIDE");
        i.putExtra("mode", StatusBarManager.DISABLE_NONE);
        sendBroadcast(i);
    }

在Activity中重写onResume和onPause方法实现状态栏的禁用和解除禁用。另:StatusBarManager是一个隐藏类,所以调用的时候可能导入不了包会报错,最简单的方法就是之间用数值替换,下面列出对应关系。

public static final int DISABLE_EXPAND              = 0x00010000;
public static final int DISABLE_NOTIFICATION_ICONS  = 0x00020000;
public static final int DISABLE_NOTIFICATION_ALERTS = 0x00040000;
public static final int DISABLE_NOTIFICATION_TICKER = 0x00080000;
public static final int DISABLE_SYSTEM_INFO         = 0x00100000;
public static final int DISABLE_HOME                = 0x00200000;
public static final int DISABLE_RECENT              = 0x01000000;
public static final int DISABLE_BACK                = 0x00400000;
public static final int DISABLE_CLOCK               = 0x00800000;
public static final int DISABLE_SEARCH              = 0x02000000;
public static final int DISABLE_NONE                = 0x00000000;


public static final int DISABLE_NAVIGATION = 
        View.STATUS_BAR_DISABLE_HOME | View.STATUS_BAR_DISABLE_RECENT;

public static final int DISABLE_MASK = DISABLE_EXPAND | DISABLE_NOTIFICATION_ICONS
        | DISABLE_NOTIFICATION_ALERTS | DISABLE_NOTIFICATION_TICKER
        | DISABLE_SYSTEM_INFO | DISABLE_RECENT | DISABLE_HOME | DISABLE_BACK | DISABLE_CLOCK
        | DISABLE_SEARCH;

所以不能引用StatusBarManager的同学之间使用其数值是一样的。如果有源码的朋友,可以使用系统编译的后framework jar包作为APP的lib就可以直接使用StatusBarManager方法了。其路径为/out/target/common/obj/JAVA_LIBRARIES/framework_intermediates/classes.jar。将classes.jar改为framework.jar导入工程就OK了。

通过上面的步骤我们知道最关键的就是调用PhoneStatusBar中disable()方法,我们这里是以广播的方式实现的,任何有新方法的同学可以脑洞大开,只要能实现调用到disable()就可以禁用状态栏。

2.修改PhoneWindowManager

路径:==/frameworks/base/policy/src/com/android/internal/policy/impl/PhoneWindowManager.java==

// monitor for system gestures
mSystemGestures = new SystemGesturesPointerEventListener(context,
new SystemGesturesPointerEventListener.Callbacks() {
    @Override
    public void onSwipeFromTop() {
        if (isGestureIsolated()) 
            return;

        if (mStatusBar != null) {
            requestTransientBars(mStatusBar);
        }
    }
    @Override
    public void onSwipeFromBottom() {
        if (isGestureIsolated()) 
            return;

        if (mNavigationBar != null && mNavigationBarOnBottom) {
            requestTransientBars(mNavigationBar);
        }
    }
    @Override
    public void onSwipeFromRight() {
        if (isGestureIsolated()) 
            return;

        if (mNavigationBar != null && !mNavigationBarOnBottom) {
            requestTransientBars(mNavigationBar);
        }
    }
    @Override
    public void onDebug() {
        // no-op
    }

    private boolean isGestureIsolated() {
        boolean ret = false;

        ret = Settings.System.getInt(mContext.getContentResolver(),"status_bar_disabled", 0) == 1;

        return ret;
    }
});

在SystemGesturesPointerEventListener.Callbacks的方法中增加一个判断函数isGestureIsolated()用于判断是否支持其对应的手势操作。在这里特别说明一下,在网上找到方法用

    private boolean isGestureIsolated() {
        boolean ret = false;
        WindowState win = mFocusedWindow != null ? mFocusedWindow:mTopFullscreenOpaqueWindowState;  
        if (win != null && (win.getSystemUiVisibility() & View.SYSTEM_UI_FLAG_IMMERSIVE_GESTURE_ISOLATED) != 0)
            ret = true;  
        else  
            ret = false;  

        return ret;
    }

getSystemUiVisibility()这种方式做判断的时候,获取到的win不一定是当前activity的,有时候是statusbar的,所以这样的效果不是很好,经常会下拉出状态栏,于是就有了

Settings.System.getInt(mContext.getContentResolver(),”status_bar_disabled”, 0) == 1;

做判断的方法,用这种方式有一个好处就是非常直接,需要它禁止下拉的时候,就调用

Settings.System.putInt(getContentResolver(), “status_bar_disabled”, 1);

就OK了,解除禁止的时候调用

Settings.System.putInt(getContentResolver(), “status_bar_disabled”, 0);

看下Activity中的具体调用

@Override
    protected void onResume() {
        super.onResume();
        //禁止下拉
        Settings.System.putInt(getContentResolver(), "status_bar_disabled", 1);
    }

    @Override
    protected void onPause() {
        super.onPause();
        //解除禁止
        Settings.System.putInt(getContentResolver(), "status_bar_disabled", 0);
    }

在AndroidManifest.xml中声明相应的权限

<uses-permission android:name="android.permission.WRITE_SETTINGS" />

网上还有修改PhoneWindowManager中的adjustSystemUiVisibilityLw方法的,如:

@Override
    public int adjustSystemUiVisibilityLw(int visibility){
        if (Settings.System.getInt(mContext.getContentResolver(),"status_bar_disabled", 0) == 0) {
            mStatusBarController.adjustSystemUiVisibilityLw(mLastSystemUiFlags, visibility);
        }   
        mNavigationBarController.adjustSystemUiVisibilityLw(mLastSystemUiFlags, visibility);
        // Reset any bits in mForceClearingStatusBarVisibility that
        // are now clear.
        mResettingSystemUiFlags &= visibility;
        // Clear any bits in the new visibility that are currently being
        // force cleared, before reporting it.  
        return visibility & ~mResettingSystemUiFlags
                & ~mForceClearedSystemUiFlags;
    }

在adjustSystemUiVisibilityLw增加一个标志的判断,但这种实现的效果也不是很好,还是会出现下拉能拉下来的情况。

综上所叙,修改PhoneWindowManager实现禁止下拉的方法还是在SystemGesturesPointerEventListener.Callbacks中增加一个内部方法,这个内部方法使用标志位的形式来判断是否支持状态栏下拉。

3. 使用StatusBarManager中方法

因为StatusBarManager是隐藏方法,所以要在IDE中直接使用的话要导入framework jar包,怎么找到framework jar在1. 修改SystemUI中有说过,这里就不重复了。直接上代码:

  1. 在AndroidManifest.xml中声明相应的权限
<uses-permission android:name="android.permission.STATUS_BAR"/>
<uses-permission android:name="android.permission.EXPAND_STATUS_BAR"/>

网上有文章说要声明

android : sharedUserId=”android.uid.system”

亲自测试没有加上面这行代码,也是可以使用的。
2. 在Activity中的引用

@Override
    protected void onResume() {
        super.onResume();
        StatusBarManager statusBarManager = (StatusBarManager) getSystemService(Context.STATUS_BAR_SERVICE);
        statusBarManager.disable(StatusBarManager.DISABLE_EXPAND);
    }

    @Override
    protected void onPause() {
        super.onPause();
        StatusBarManager statusBarManager = (StatusBarManager) getSystemService(Context.STATUS_BAR_SERVICE);
        statusBarManager.disable(StatusBarManager.DISABLE_NONE);
    }


  1. 是使用系统签名,编译为系统app

java -jar signapk.jar platform.x509.pem platform.pk8 TestDemo.apk TestDemoNew.apk
TestDemoNew.apk就是系统签名后的apk,然后push到/system/app/目录下就ok了。关于签名的知识就不多说了,可自行找到相关资料。

下面看下原生系统中电话处理禁止下拉的做法,代码如下:

路径:==/packages/apps/Phone/src/com/android/phone/NotificationMgr.java==

/**
 * Updates the status bar to reflect the current desired state.
 */
private void updateStatusBar() {
    int state = StatusBarManager.DISABLE_NONE;

    if (!mIsExpandedViewEnabled) {
        state |= StatusBarManager.DISABLE_EXPAND;
    }
    if (!mIsNotificationEnabled) {
        state |= StatusBarManager.DISABLE_NOTIFICATION_ALERTS;
    }
    if (!mIsSystemBarNavigationEnabled) {
        // Disable *all* possible navigation via the system bar.
        state |= StatusBarManager.DISABLE_HOME;
        state |= StatusBarManager.DISABLE_RECENT;
        state |= StatusBarManager.DISABLE_BACK;
    }

    if (DBG) log("updateStatusBar: state = 0x" + Integer.toHexString(state));
    mStatusBarManager.disable(state);
}

从这个方法中我们知道系统禁用状态栏的方法就是调用StatusBarManager实现的。

参考文章

Android 应用层面屏蔽状态栏方法总结

禁止Android的StatusBar下拉

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