原文地址：http://blog.csdn.net/ouyang_peng/article/details/49815865
今天有個用戶對【設置】有個特殊的要求，即：
1、開機的時候默認顯示【開發者選項】並打開【USB調試】開關 （【Developer options】-->【USB debugging】）
2、開機的時候默認打開【安全】-->【未知來源】的開關 (【Security】--->【Unknown sources】)
1、首先解決【設置】界面默認顯示【開發者選項】的問題
查看源代碼：packages/apps/Settings/src/com/android/settings/SettingsActivity.java
在updateTilesList(List<DashboardCategory> target)方法中，可以找到【開發者選項】相關的代碼：
- 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變量定義在該方法最開始處
- final boolean showDev = mDevelopmentPreferences.getBoolean(
- DevelopmentSettings.PREF_SHOW,
- android.os.Build.TYPE.equals("eng"));
因此要想特定客戶直接顯示【開發者選項】，則將showDev的值改變即可，代碼如下：
- //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變量之前，將DevelopmentSettings.PREF_SHOW的值設置爲true，那麼showDev也會是true。這樣【開發者選項】就會默認打開。那個判斷是J5客戶的方法在/frameworks/base/core/java/android/os/SystemProperties.java中定義
- public static boolean isJ5Version(){
- return SystemProperties.get("ro.product.model").contains("J5");
- }
2、解決【開發者選項】-->【USB調試】開關
首先查看packages/apps/Settings/src/com/android/settings/DevelopmentSettings.java
在updateAllOptions()方法中，有關於【USB調試】的邏輯處理。
- /// 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調試】開關控件。一開始我直接強制的把isChecked變量設置爲true，如下代碼所示
- /// 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);
但是這樣的話，直接刷機後開機的話還是不能直接連接USB調試，還要重新關閉該開關再打開該開關才能進行USB調試，因此該方案被放棄。
因爲是否真正打開【USB調試】功能，是看Settings.Global.ADB_ENABLED這個屬性的值是0還是1。因此真正的方法是在一個接受開機廣播的廣播接收者中將Settings.Global.ADB_ENABLED設置爲1。
在下面和【未知來源】一起修改，在第4步驟中解決。
3、解決【安全】-->【未知來源】的開關 默認打開的問題
首先查看packages/apps/Settings/src/com/android/settings/SecuritySettings.java文件，在createPreferenceHierarchy()方法中找到【未知來源】的控件，403行附近
- mToggleAppInstallation = (SwitchPreference) findPreference(
- KEY_TOGGLE_INSTALL_APPLICATIONS);
- mToggleAppInstallation.setChecked(isNonMarketAppsAllowed());
其中isNonMarketAppsAllowed()方法代碼如下
- private boolean isNonMarketAppsAllowed() {
- return Settings.Global.getInt(getContentResolver(),
- Settings.Global.INSTALL_NON_MARKET_APPS, 0) > 0;
- }
setNonMarketAppsAllowed(boolean enabled)方法代碼如下
- 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);
- }
一開始我在判斷isNonMarketAppsAllowed()方法之前，先調用setNonMarketAppsAllowed()方法，這樣一進入這個界面的話，【未知來源】選項是被勾選的。
- 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，刷完機直接安裝一個第三方的apk的話，還是會彈出窗口要我設置【未知來源】選項，如下所示，因此該方案被放棄。
點擊【設置】按鈕進入到界面是，【未知來源】按鈕默認勾選了，這個時候退出去，繼續安裝apk的話就可以安裝了，如下所示：
因爲這個添加的代碼是在SecuritySettings的createPreferenceHierarchy()方法中，也就是說要進入到該Activity才生效。這樣明顯沒達到目的。
因此要和設置【USB調試】一樣，在一個接收開機廣播的廣播接收者中將Settings.Global.INSTALL_NON_MARKET_APPS設置爲1。
4、找Settings裏面定義的一個接收開機廣播的廣播接收者，在AndroidManifest.xml中找到一個，當然你也可以自己定義一個這樣的廣播接收者。
- <!-- 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)方法中加入以下代碼：
- //added by ouyang 2015-11-13
- if (android.os.SystemProperties.isJ5Version()) {
- // 開機啓動時，默認設置 [未知來源] 勾選
- Settings.Global.putInt(context.getContentResolver(), Settings.Global.INSTALL_NON_MARKET_APPS,1);
- // 開機啓動時，默認設置 [USB調試] 勾選
- Settings.Global.putInt(context.getContentResolver(),Settings.Global.ADB_ENABLED, 1);
- }
- //added by ouyang 2015-11-13 end
而一開始添加的代碼可以註釋掉了。通過git diff可以看出來
- 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());
這樣改爲後，編譯，刷機後，插上USB數據線就可以開始進行adb調試了，而且可以直接安裝未知來源的apk了。