Android系统之路(初识MTK) ------ 默认打开开发者模式默认打开USB调试

原文地址：http://blog.csdn.net/ouyang_peng/article/details/49815865

            今天有个用户对【设置】有个特殊的要求，即：

1、开机的时候默认显示【开发者选项】并打开【USB调试】开关    （【Developer options】-->【USB debugging】）

2、开机的时候默认打开【安全】-->【未知来源】的开关    (【Security】--->【Unknown sources】)

 

 

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 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

 public static boolean isJ5Version(){
     return SystemProperties.get("ro.product.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。

  <receiver android:name="com.mediatek.settings.RestoreRotationReceiver">
      <intent-filter>
         <action android:name="android.intent.action.BOOT_COMPLETED" />
         <action android:name="android.intent.action.ACTION_BOOT_IPO" />
      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 2015-11-13
 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

 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);

 

 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。