Android 7.1 ro.rk.install_non_market_apps属性无效

平台

RK3288/RK3368 + Android 7.12
1

问题

在旧的SDK上, 可以通过设置默认 ro.rk.install_non_market_apps=true, 默认打开安装未知来源应用 在新的代码上此属性不生效

解决

diff --git a/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java b/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
old mode 100644
new mode 100755
index 9ed6063..dac22e1
--- a/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
+++ b/frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
@@ -2522,8 +2522,13 @@ class DatabaseHelper extends SQLiteOpenHelper {
             loadStringSetting(stmt, Settings.Secure.IMMERSIVE_MODE_CONFIRMATIONS,
                         R.string.def_immersive_mode_confirmations);
 
-            loadBooleanSetting(stmt, Settings.Secure.INSTALL_NON_MARKET_APPS,
-                    R.bool.def_install_non_market_apps);
+            String propNonMarket = android.os.SystemProperties.get("ro.rk.install_non_market_apps");
+            if(propNonMarket.equals("true")){
+                loadSetting(stmt, Settings.Secure.INSTALL_NON_MARKET_APPS, "1");
+            }else{
+                loadBooleanSetting(stmt, Settings.Secure.INSTALL_NON_MARKET_APPS,
+                        R.bool.def_install_non_market_apps);
+            }
 
             loadBooleanSetting(stmt, Settings.Secure.WAKE_GESTURE_ENABLED,
                     R.bool.def_wake_gesture_enabled);

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• frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java

    private void loadSecureSettings(SQLiteDatabase db) {
        SQLiteStatement stmt = null;
        try {
        //...省略代码...
            String propNonMarket = android.os.SystemProperties.get("ro.rk.install_non_market_apps");
            if(propNonMarket.equals("true")){
                loadSetting(stmt, Settings.Secure.INSTALL_NON_MARKET_APPS, "1");
            }else{
                loadBooleanSetting(stmt, Settings.Secure.INSTALL_NON_MARKET_APPS,
                        R.bool.def_install_non_market_apps);
            }
		//...省略代码...
	}
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插曲

• 刚开始加的代码是:

            loadBooleanSetting(stmt, Settings.Secure.INSTALL_NON_MARKET_APPS,
                        R.bool.def_install_non_market_apps);
            String propNonMarket = android.os.SystemProperties.get("ro.rk.install_non_market_apps");
            if(propNonMarket.equals("true")){
                loadSetting(stmt, Settings.Secure.INSTALL_NON_MARKET_APPS, "1");
            }
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这是无效的, 原因是, 第一行的代码已经往数据库里插入了数据. 见下面SQLiteStatement 的赋值方式:

        SQLiteStatement stmt = null;
        stmt = db.compileStatement("INSERT OR IGNORE INTO secure(name,value)"
                    + " VALUES(?,?);");
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