怎样在源代码中修改android系统的屏幕默认

发布网友 发布时间:2022-04-22 16:08

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热心网友 时间:2023-08-25 14:47

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:

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

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:

//added by ouyang 2015-11-10  set DevelopmentSettings.PREF_SHOW=true if model is J5if (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 endfinal 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

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

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。

/// 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);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

/// 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

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

其中isNonMarketAppsAllowed()方法代码如下

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

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。

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。

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:



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。

<!--  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:

//added by ouyang 2015-11-13if (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

diff --git a/packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java b/packages/apps/Settings/src/com/android/settings/Develindex 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);
diff --git a/packages/apps/Settings/src/com/android/settings/SecuritySettings.java b/packages/apps/Settings/src/com/android/settings/Securityindex 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。

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