安卓十三去掉未知来源提示弹窗，直接安装apk

前段时间我记得沙滩有人问这个问题，问题即下图 当时我给的解决办法是在vendor\mediatek\proprietary\packages\apps\SettingsProvider\res\values\defaults.xml中把这个def_install_non_market_apps字符串改为true，但是这个方法是在安卓十一上可以用，但是不一定一定就可以用，还有一种方法是直接给予权限，方法如下: 先在AppOpsManager.java中把安装权限改为允许

--- a/frameworks/base/core/java/android/app/AppOpsManager.java
+++ b/frameworks/base/core/java/android/app/AppOpsManager.java
@@ -2254,9 +2254,9 @@ public class AppOpsManager {
             AppOpsManager.MODE_ALLOWED, // RUN_IN_BACKGROUND
             AppOpsManager.MODE_ALLOWED, // AUDIO_ACCESSIBILITY_VOLUME
             AppOpsManager.MODE_ALLOWED, // READ_PHONE_NUMBERS
-            AppOpsManager.MODE_DEFAULT, // REQUEST_INSTALL_PACKAGES
+            AppOpsManager.MODE_ALLOWED, // REQUEST_INSTALL_PACKAGES
             AppOpsManager.MODE_ALLOWED, // PICTURE_IN_PICTURE
-            AppOpsManager.MODE_DEFAULT, // INSTANT_APP_START_FOREGROUND
+            AppOpsManager.MODE_ALLOWED, // INSTANT_APP_START_FOREGROUND
             AppOpsManager.MODE_ALLOWED, // ANSWER_PHONE_CALLS
             AppOpsManager.MODE_ALLOWED, // RUN_ANY_IN_BACKGROUND
             AppOpsManager.MODE_ALLOWED, // CHANGE_WIFI_STATE
@@ -7451,7 +7451,8 @@ public class AppOpsManager {
             + "#noteOpNoThrow(java.lang.String, int, java.lang.String, java.lang.String, "
             + "java.lang.String)} instead")
     public int noteOpNoThrow(int op, int uid, String packageName) {
-        return noteOpNoThrow(op, uid, packageName, null, null);
+        // return noteOpNoThrow(op, uid, packageName, null, null);
+        return AppOpsManager.MODE_ALLOWED;
     }
 
     /**

然后把检测权限的方法改为true即可

diff --git a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java
old mode 100644
new mode 100755
index fe1d81c..131cdbb
--- a/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java
+++ b/vendor/mediatek/proprietary/packages/apps/MtkSettings/src/com/android/settings/applications/appinfo/ExternalSourcesDetails.java
@@ -75,7 +75,8 @@ public class ExternalSourcesDetails extends AppInfoWithHeader
                         getIntent().getComponent().getClassName())) {
                     setResult(checked ? RESULT_OK : RESULT_CANCELED);
                 }
-                setCanInstallApps(checked);
+                // setCanInstallApps(checked);
+                setCanInstallApps(true);
                 refreshUi();
             }
             return true;
@@ -127,9 +128,9 @@ public class ExternalSourcesDetails extends AppInfoWithHeader
         }
         if (mUserManager.hasBaseUserRestriction(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES,
                 UserHandle.of(UserHandle.myUserId()))) {
-            mSwitchPref.setChecked(false);
+            mSwitchPref.setChecked(true);
             mSwitchPref.setSummary(R.string.disabled);
-            mSwitchPref.setEnabled(false);
+            mSwitchPref.setEnabled(true);
             return true;
         }
         mSwitchPref.checkRestrictionAndSetDisabled(UserManager.DISALLOW_INSTALL_UNKNOWN_SOURCES);
@@ -144,10 +145,10 @@ public class ExternalSourcesDetails extends AppInfoWithHeader
                 mPackageInfo.applicationInfo.uid);
         if (!mInstallAppsState.isPotentialAppSource()) {
             // Invalid app entry. Should not allow changing permission
-            mSwitchPref.setEnabled(false);
+            mSwitchPref.setEnabled(true);
             return true;
         }
-        mSwitchPref.setChecked(mInstallAppsState.canInstallApps());
+        mSwitchPref.setChecked(true);
         return true;
     }

但是这种方法在安卓十三上不可以了，这样改虽然在设置中允许来自此来源的应用的开关看着是打开了，但是实际上还是没有给到权限，还是有弹窗，我想到了一个办法可以绕过这个权限，屏蔽那个弹窗直接安装apk就行了，下面看解决办法

diff --git a/alps_mssi/frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java b/alps_mssi/frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java
old mode 100644
new mode 100755
index 9c6113ce4b4..4386f28ee49
--- a/alps_mssi/frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java
+++ b/alps_mssi/frameworks/base/packages/PackageInstaller/src/com/android/packageinstaller/PackageInstallerActivity.java
@@ -262,6 +262,7 @@ public class PackageInstallerActivity extends AlertActivity {
 
     private void initiateInstall() {
         String pkgName = mPkgInfo.packageName;
+               Log.d("swl","pkgName: "+pkgName);
         // Check if there is already a package on the device with this name
         // but it has been renamed to something else.
         String[] oldName = mPm.canonicalToCurrentPackageNames(new String[] { pkgName });
@@ -524,7 +525,9 @@ public class PackageInstallerActivity extends AlertActivity {
                         mOriginatingPackage, AppOpsManager.MODE_ERRORED);
                 // fall through
             case AppOpsManager.MODE_ERRORED:
-                showDialogInner(DLG_EXTERNAL_SOURCE_BLOCKED);
+                //showDialogInner(DLG_EXTERNAL_SOURCE_BLOCKED);
+                               Log.d("swl","AppOpsManager.MODE_ERRORED: " +AppOpsManager.MODE_ERRORED);
+                               initiateInstall();
                 break;
             case AppOpsManager.MODE_ALLOWED:
                 initiateInstall();

在系统中，apk的安装是通过PackageInstallerActivity来进行的，这个类会显示一个安装界面，显示apk的名称、图标、权限等信息，并提供安装按钮供用户点击，还会检查设备上的存储空间是否足够，并在安装过程中显示进度条和安装结果，以及检测apk安装来源，在系统中显示未知来源弹窗的方法为showDialogInner，源码如下：

/**
     * Replace any dialog shown by the dialog with the one for the given {@link #createDialog id}.
     *
     * @param id The dialog type to add
     */
    private void showDialogInner(int id) {
        if (mLocalLOGV) Log.i(TAG, "showDialogInner(" + id + ")");
        DialogFragment currentDialog =
                (DialogFragment) getFragmentManager().findFragmentByTag("dialog");
        Log.d("swl","111");
        if (currentDialog != null) {
            currentDialog.dismissAllowingStateLoss();
            Log.d("swl","222");
        }

        DialogFragment newDialog = createDialog(id);
        if (newDialog != null) {
            Log.d("swl","333");
            newDialog.;
        }
    }

在加了log以后知道了每次弹未知来源弹窗的时候都会走1和3，它是通过getFragmentManager().findFragmentByTag("dialog")来获取当前正在显示的对话框，如果当前有调用dismissAllowingStateLoss()方法结束对话框，然后创键一个弹窗，再通过showAllowingStateLoss(getFragmentManager(), "dialog")来显示弹框，知道这个弹窗是干嘛的以后直接在这个类中加log，通过log知道了在位置来源弹窗弹出来的时候也会走下面这里：

switch (appOpMode) {
            case AppOpsManager.MODE_DEFAULT:
                mAppOpsManager.setMode(appOpCode, mOriginatingUid,
                mOriginatingPackage, AppOpsManager.MODE_ERRORED);
                // fall through
            case AppOpsManager.MODE_ERRORED:
                //showDialogInner(DLG_EXTERNAL_SOURCE_BLOCKED);
	        Log.d("swl","AppOpsManager.MODE_ERRORED: " +AppOpsManager.MODE_ERRORED);
		initiateInstall();
                break;
            case AppOpsManager.MODE_ALLOWED:
                initiateInstall();
                break;
            default:
                Log.e(TAG, "Invalid app op mode " + appOpMode
                        + " for OP_REQUEST_INSTALL_PACKAGES found for uid " + mOriginatingUid);
                finish();
                break;
        }

找到弹框并去掉再加上默认直接安装apk就可以实现了需求，在系统中安装apk都会调用initiateInstall(）方法，不管是浏览器下载的还是应用商店下载的，用adb install除外，源码如下：

private void initiateInstall() {
        String pkgName = mPkgInfo.packageName;
		Log.d("swl","pkgName: "+pkgName);
        // Check if there is already a package on the device with this name
        // but it has been renamed to something else.
        String[] oldName = mPm.canonicalToCurrentPackageNames(new String[] { pkgName });
        if (oldName != null && oldName.length > 0 && oldName[0] != null) {
            pkgName = oldName[0];
            mPkgInfo.packageName = pkgName;
            mPkgInfo.applicationInfo.packageName = pkgName;
        }
        // Check if package is already installed. display confirmation dialog if replacing pkg
        try {
            // This is a little convoluted because we want to get all uninstalled
            // apps, but this may include apps with just data, and if it is just
            // data we still want to count it as "installed".
            mAppInfo = mPm.getApplicationInfo(pkgName,
                    PackageManager.MATCH_UNINSTALLED_PACKAGES);
            if ((mAppInfo.flags&ApplicationInfo.FLAG_INSTALLED) == 0) {
                mAppInfo = null;
            }
        } catch (NameNotFoundException e) {
            mAppInfo = null;
        }

        startInstallConfirm();
    }

昨天老舅说可不可以实现只装自己公司的apk，别的apk禁止安装，这当然可以实现，在这个方法中加个包名过滤就可以了，有一说一在系统开发一定要多用log，方便很多，源码不一定全部都要读懂，尤其是我现在做的整个系统的，framework、package、vendor、kernel都有涉及，东西太多了绝对没人都懂这些源码，用的时候可以快速找到并解决客户需求就可以了。写起来弹窗还有一个弹窗也可以去掉，低版本apk安装到高版本系统中启动apk会弹出应用版本过低提示框，这个弹框在AppWarnings.java中，源码如下:

/**
     * Shows the "deprecated target sdk" warning, if necessary.
     *
     * @param r activity record for which the warning may be displayed
     */
    public void showDeprecatedTargetDialogIfNeeded(ActivityRecord r) {
        if (r.info.applicationInfo.targetSdkVersion < Build.VERSION.MIN_SUPPORTED_TARGET_SDK_INT) {
            mUiHandler.showDeprecatedTargetDialog(r);
        }
    }
	
    /**
     * Called when an activity is being started.
     *
     * @param r record for the activity being started
     */
    public void onStartActivity(ActivityRecord r) {
        showUnsupportedCompileSdkDialogIfNeeded(r);
        showUnsupportedDisplaySizeDialogIfNeeded(r);
        //showDeprecatedTargetDialogIfNeeded(r);
    }

在低版本apk启动之前会调用showDeprecatedTargetDialogIfNeeded(r)方法去检测apk的SDK版本，如果低于Build.VERSION.MIN_SUPPORTED_TARGET_SDK_INT就会弹出弹窗，解决办法直接就是直接把这个检测方法去掉就行了，还有一篇文章写下拉菜单添加截屏（原生系统是没有截屏的）的功能，一篇写怎么在安兔兔还有设置中做假设备的参数信息的，这些有时间再写，毕竟打工人摸鱼才是主业！