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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<DashboardCategory> 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。
<!-- Restore Rotation Receiver -->
<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。
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作者：欧阳鹏 欢迎转载，与人分享是进步的源泉！
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版权声明：本文为欧阳鹏原创文章，欢迎转载，转载请注明出处! http://blog.csdn.net/ouyang_peng
Android系统移植与调试之------->如何修改Android系统默认显示【开发者选项】并默认打开【USB调试】和【未知来源】开关
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原文地址：http://blog.csdn.net/ouyang_peng/article/details/49815865
