Android系统移植与调试之-------)如何修改Android系统默认显示

Android系统移植与调试之-------)如何修改Android系统默认显示

 

1、首先解决【设置】界面默认显示【开发者选项】的问题

查看源代码：packages/apps/Settings/src/com/android/settings/SettingsActivity.java

在updateTilesList(List target)方法中，可以找到【开发者选项】相关的代码：

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else if (id == R.id.development_settings) {                      Log.d(LOG_TAG, =================oyp K=+showDev);                      if (!showDev || um.hasUserRestriction(                              UserManager.DISALLOW_DEBUGGING_FEATURES)) {                          removeTile = true ;                      }                  }

其中showDev变量定义在该方法最开始处

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final boolean showDev = mDevelopmentPreferences.getBoolean(                 DevelopmentSettings.PREF_SHOW,                 android.os.Build.TYPE.equals(eng));

因此要想特定客户直接显示【开发者选项】，则将showDev的值改变即可，代码如下：

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//added by ouyang 2015-11-10  set DevelopmentSettings.PREF_SHOW=true if model is J5 if (android.os.SystemProperties.isJ5Version()) {      SharedPreferences.Editor editor=mDevelopmentPreferences.edit();      editor.putBoolean(DevelopmentSettings.PREF_SHOW, true );      editor.commit();      Log.d(LOG_TAG, =================oyp set DevelopmentSettings.PREF_SHOW= true if model is J5 ); } //added by ouyang 2015-11-10 end final boolean showDev = mDevelopmentPreferences.getBoolean(          DevelopmentSettings.PREF_SHOW,          android.os.Build.TYPE.equals(eng));

即在初始化showDev变量之前，将DevelopmentSettings.PREF_SHOW的值设置为true，那么showDev也会是true。这样【开发者选项】就会默认打开。那个判断是J5客户的方法在/frameworks/base/core/java/android/os/SystemProperties.java中定义

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public static boolean isJ5Version(){      return SystemProperties.get(ro.product.model).contains(J5); }

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2、解决【开发者选项】-->【USB调试】开关

首先查看packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java

在updateAllOptions()方法中，有关于【USB调试】的逻辑处理。

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/// M: CR ALPS00244115. Lock and unlock screen, the USB debugging is unchecked.        boolean isChecked = (mAdbDialog != null && mAdbDialog.isShowing()) ? true :                    (Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0 ) != 0 );        updateSwitchPreference(mEnableAdb, isChecked);        /// M: update usb preference again        mExt.customUSBPreference(mEnableAdb);

 

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void updateSwitchPreference(SwitchPreference switchPreference, boolean value) {      switchPreference.setChecked(value);      mHaveDebugSettings |= value; }

其中mEnableAdb即【USB调试】开关控件。一开始我直接强制的把isChecked变量设置为true，如下代码所示

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/// M: CR ALPS00244115. Lock and unlock screen, the USB debugging is unchecked.           boolean isChecked = (mAdbDialog != null && mAdbDialog.isShowing()) ? true :                       (Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0 ) != 0 ); -        //added by ouyang 2015-11-10  set mEnableAdb=true if model is J5 -        if (android.os.SystemProperties.isJ5Version()) { -               isChecked= true ; -        } -        //added by ouyang 2015-11-10 end           updateSwitchPreference(mEnableAdb, isChecked);           /// M: update usb preference again           mExt.customUSBPreference(mEnableAdb);

但是这样的话，直接刷机后开机的话还是不能直接连接USB调试，还要重新关闭该开关再打开该开关才能进行USB调试，因此该方案被放弃。

因为是否真正打开【USB调试】功能，是看Settings.Global.ADB_ENABLED这个属性的值是0还是1。因此真正的方法是在一个接受开机广播的广播接收者中将Settings.Global.ADB_ENABLED设置为1。

在下面和【未知来源】一起修改，在第4步骤中解决。

 

3、解决【安全】-->【未知来源】的开关 默认打开的问题

首先查看packages/apps/Settings/src/com/android/settings/SecuritySettings.java文件，在createPreferenceHierarchy()方法中找到【未知来源】的控件，403行附近

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mToggleAppInstallation = (SwitchPreference) findPreference(                 KEY_TOGGLE_INSTALL_APPLICATIONS);   mToggleAppInstallation.setChecked(isNonMarketAppsAllowed());

其中isNonMarketAppsAllowed()方法代码如下

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private boolean isNonMarketAppsAllowed() {        return Settings.Global.getInt(getContentResolver(),                                      Settings.Global.INSTALL_NON_MARKET_APPS, 0 ) > 0 ;    }

setNonMarketAppsAllowed(boolean enabled)方法代码如下

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private void setNonMarketAppsAllowed( boolean enabled) {       final UserManager um = (UserManager) getActivity().getSystemService(Context.USER_SERVICE);       if (um.hasUserRestriction(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES)) {           return ;       }       // Change the system setting       Settings.Global.putInt(getContentResolver(), Settings.Global.INSTALL_NON_MARKET_APPS,                               enabled ? 1 : 0 );   }

一开始我在判断isNonMarketAppsAllowed()方法之前，先调用setNonMarketAppsAllowed()方法，这样一进入这个界面的话，【未知来源】选项是被勾选的。

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mToggleAppInstallation = (SwitchPreference) findPreference(                   KEY_TOGGLE_INSTALL_APPLICATIONS); -        -        //added by ouyang 2015-11-10  setChecked(true) if the model is J5 -        if (android.os.SystemProperties.isJ5Version()) { -               setNonMarketAppsAllowed( true ); -        }           mToggleAppInstallation.setChecked(isNonMarketAppsAllowed()); -        //added by ouyang 2015-11-10  end

但是，刷完机直接安装一个第三方的apk的话，还是会弹出窗口要我设置【未知来源】选项，如下所示，因此该方案被放弃。

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点击【设置】按钮进入到界面是，【未知来源】按钮默认勾选了，这个时候退出去，继续安装apk的话就可以安装了，如下所示：

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因为这个添加的代码是在SecuritySettings的createPreferenceHierarchy()方法中，也就是说要进入到该Activity才生效。这样明显没达到目的。

因此要和设置【USB调试】一样，在一个接收开机广播的广播接收者中将Settings.Global.INSTALL_NON_MARKET_APPS设置为1。

 

4、找Settings里面定义的一个接收开机广播的广播接收者，在AndroidManifest.xml中找到一个，当然你也可以自己定义一个这样的广播接收者。

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<!--  Restore Rotation Receiver -->   <receiver android:name= "com.mediatek.settings.RestoreRotationReceiver" >       <intent-filter>                                                   </action></action></intent-filter>   </receiver>

因此在packages/apps/Settings/src/com/mediatek/settings/RestoreRotationReceiver.java的onReceive(Context context, Intent intent)方法中加入以下代码：

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//added by ouyang 2015-11-13 if (android.os.SystemProperties.isJ5Version()) {      // 开机启动时，默认设置 [未知来源] 勾选      Settings.Global.putInt(context.getContentResolver(), Settings.Global.INSTALL_NON_MARKET_APPS, 1 );      // 开机启动时，默认设置 [USB调试] 勾选      Settings.Global.putInt(context.getContentResolver(),Settings.Global.ADB_ENABLED, 1 ); } //added by ouyang 2015-11-13  end

 

而一开始添加的代码可以注释掉了。通过git diff可以看出来

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diff --git a/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java b/packages/apps/Settings/src/com/android/settings/Devel index 0a987df..503270a 100755 --- a/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java +++ b/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java @@ - 508 , 15 + 508 , 9 @@ public class DevelopmentSettings extends SettingsPreferenceFragment           final Context context = getActivity();           final ContentResolver cr = context.getContentResolver();           mHaveDebugSettings = false ; -           /// M: CR ALPS00244115. Lock and unlock screen, the USB debugging is unchecked.           boolean isChecked = (mAdbDialog != null && mAdbDialog.isShowing()) ? true :                       (Settings.Global.getInt(cr, Settings.Global.ADB_ENABLED, 0 ) != 0 ); -        //added by ouyang 2015-11-10  set mEnableAdb=true if model is J5 -        if (android.os.SystemProperties.isJ5Version()) { -               isChecked= true ; -        } -        //added by ouyang 2015-11-10 end           updateSwitchPreference(mEnableAdb, isChecked);           /// M: update usb preference again           mExt.customUSBPreference(mEnableAdb);

 

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diff --git a/packages/apps/Settings/src/com/android/settings/SecuritySettings.java b/packages/apps/Settings/src/com/android/settings/Security index 4de173a..392e6ee 100755 --- a/packages/apps/Settings/src/com/android/settings/SecuritySettings.java +++ b/packages/apps/Settings/src/com/android/settings/SecuritySettings.java @@ - 402 , 14 + 402 , 7 @@ public class SecuritySettings extends SettingsPreferenceFragment                   root.findPreference(KEY_DEVICE_ADMIN_CATEGORY);           mToggleAppInstallation = (SwitchPreference) findPreference(                   KEY_TOGGLE_INSTALL_APPLICATIONS); -        -        //added by ouyang 2015-11-10  setChecked(true) if the model is J5 -        if (android.os.SystemProperties.isJ5Version()) { -               setNonMarketAppsAllowed( true ); -        }           mToggleAppInstallation.setChecked(isNonMarketAppsAllowed()); -        //added by ouyang 2015-11-10  end -                  // Side loading of apps.           // Disable for restricted profiles. For others, check if policy disallows it.           mToggleAppInstallation.setEnabled(!um.getUserInfo(UserHandle.myUserId()).isRestricted());

 

这样改为后，编译，刷机后，插上USB数据线就可以开始进行adb调试了，而且可以直接安装未知来源的apk了。