【干货】Android系统定制基础篇：第二部分(Launcher3支持键盘切换焦点、开发者模式密码确认、禁止非预装应用安装、配置时间)
1、Android Launcher3支持键盘切换焦点
Android Launcher3 默认并不支持键盘操作，无法切换焦点，在一些需要支持键盘或遥控操作的设备中无法使用，因些对 Launcher3 做简单修改，使其支持键盘切换焦点。
diff --git a/packages/apps/Launcher3/res/layout/all_apps.xml b/packages/apps/Launcher3/res/layout/all_apps.xml
old mode 100644
new mode 100755
diff --git a/packages/apps/Launcher3/res/layout/all_apps_icon.xml b/packages/apps/Launcher3/res/layout/all_apps_ic
index 3c2f842..1c22ec3 100755
--- a/packages/apps/Launcher3/res/layout/all_apps_icon.xml
+++ b/packages/apps/Launcher3/res/layout/all_apps_icon.xml
@@ -24,5 +24,7 @@launcher:iconDisplay="all_apps"launcher:centerVertically="true"android:paddingLeft="@dimen/dynamic_grid_cell_padding_x"
- android:paddingRight="@dimen/dynamic_grid_cell_padding_x" />
+ android:paddingRight="@dimen/dynamic_grid_cell_padding_x"
+ android:focusable="true"
+ android:focusableInTouchMode="false" />diff --git a/packages/apps/Launcher3/res/layout/page_indicator.xml b/packages/apps/Launcher3/res/layout/page_indic
old mode 100644
new mode 100755
diff --git a/packages/apps/Launcher3/res/layout/search_container_workspace.xml b/packages/apps/Launcher3/res/layou
old mode 100644
new mode 100755
index 1c617b1..161431f
--- a/packages/apps/Launcher3/res/layout/search_container_workspace.xml
+++ b/packages/apps/Launcher3/res/layout/search_container_workspace.xml
@@ -22,9 +22,11 @@android:id="@id/search_container_workspace"android:padding="0dp" >- <fragment
- android:name="com.android.launcher3.qsb.QsbContainerView$QsbFragment"
- android:layout_width="match_parent"
- android:tag="qsb_view"
- android:layout_height="match_parent"/>
+ <!--Modified by shenhb@topband.com.cn，remove search box.-->
+ <!--<fragment-->
+ <!--android:name="com.android.launcher3.qsb.QsbContainerView$QsbFragment"-->
+ <!--android:layout_width="match_parent"-->
+ <!--android:tag="qsb_view"-->
+ <!--android:layout_height="match_parent"/>-->
+ <!--End of modify--></com.android.launcher3.qsb.QsbContainerView>
\ No newline at end of file
diff --git a/packages/apps/Launcher3/src/com/android/launcher3/Workspace.java b/packages/apps/Launcher3/src/com/an
old mode 100644
new mode 100755
index 6ce3ad6..8a03091
--- a/packages/apps/Launcher3/src/com/android/launcher3/Workspace.java
+++ b/packages/apps/Launcher3/src/com/android/launcher3/Workspace.java
@@ -606,11 +606,13 @@ public class Workspace extends PagedView.inflate(R.layout.search_container_workspace,firstPage, false);}+ /* Modified by shenhb@topband.com.cn，remove search box.CellLayout.LayoutParams lp = new CellLayout.LayoutParams(0, 0, firstPage.getCountX(), 1);lp.canReorder = false;if (!firstPage.addViewToCellLayout(qsb, 0, R.id.search_container_workspace, lp, true)) {Log.e(TAG, "Failed to add to item at (0, 0) to CellLayout");}
+ End of Modify */}public void removeAllWorkspaceScreens() {
diff --git a/packages/apps/Launcher3/src/com/android/launcher3/config/BaseFlags.java b/packages/apps/Launcher3/src
old mode 100644
new mode 100755
index 6a4cbcb..5bc4df8
--- a/packages/apps/Launcher3/src/com/android/launcher3/config/BaseFlags.java
+++ b/packages/apps/Launcher3/src/com/android/launcher3/config/BaseFlags.java
@@ -51,7 +51,7 @@ abstract class BaseFlags {// Feature flag to enable moving the QSB on the 0th screen of the workspace.public static final boolean QSB_ON_FIRST_SCREEN = true;// When enabled the all-apps icon is not added to the hotseat.
- public static final boolean NO_ALL_APPS_ICON = true;
+ public static final boolean NO_ALL_APPS_ICON = false;// When enabled fling down gesture on the first workspace triggers search.public static final boolean PULLDOWN_SEARCH = false;// When enabled the status bar may show dark icons based on the top of the wallpaper.
2、Android打开开发者模式需要密码确认
在安全性要求比较高的产品中，一般会默认关闭『adb调试』，同时禁止用户打开『adb调试』功能。在Android8.1中默认禁止『adb调试』只需要将下面属性：
persist.sys.usb.config=mtp,adb
改为：
persist.sys.usb.config=mtp
Android默认通过连续点击『版本号』可以打开『开发者选项』，在『开发者选项』中可以打开『adb调试』，所以要禁止用户打开『adb调试』功能，我们在用户点击『版本号』时弹出管理员密码对话框，只有输入正确的管理员密码才可以打开『开发者选项』。修改如下：
diff --git a/packages/apps/Settings/src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java b/pac
index 7a00163..d9b41a4 100755
--- a/packages/apps/Settings/src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java
+++ b/packages/apps/Settings/src/com/android/settings/deviceinfo/BuildNumberPreferenceController.java
@@ -18,17 +18,22 @@ package com.android.settings.deviceinfo;import android.app.Activity;import android.app.Fragment;
+import android.app.AlertDialog;
+import android.app.Dialog;
+import android.content.DialogInterface;import android.content.Context;import android.content.Intent;import android.os.Build;import android.os.UserHandle;import android.os.UserManager;
+import android.os.SystemProperties;import android.support.v7.preference.Preference;import android.support.v7.preference.PreferenceScreen;import android.text.BidiFormatter;import android.text.TextUtils;import android.util.Pair;import android.widget.Toast;
+import android.widget.EditText;import com.android.internal.logging.nano.MetricsProto.MetricsEvent;import com.android.settings.R;
@@ -63,6 +68,9 @@ public class BuildNumberPreferenceController extends AbstractPreferenceControlleprivate boolean mDebuggingFeaturesDisallowedBySystem;private int mDevHitCountdown;private boolean mProcessingLastDevHit;
+
+ private boolean isAuthenticated = false;
+ private Dialog mPasswordDialog;public BuildNumberPreferenceController(Context context, Activity activity, Fragment fragment,Lifecycle lifecycle) {
@@ -114,7 +122,34 @@ public class BuildNumberPreferenceController extends AbstractPreferenceControlle@Overridepublic boolean handlePreferenceTreeClick(Preference preference) {
- /*
+ final String password = SystemProperties.get("ro.topband.password", "");
+ if (!isAuthenticated && !TextUtils.isEmpty(password)
+ && (mPasswordDialog == null || !mPasswordDialog.isShowing())) {
+ EditText editText = new EditText(mContext);
+ mPasswordDialog = new AlertDialog.Builder(mContext)
+ .setTitle(R.string.password_dialog_title)
+ .setView(editText)
+ .setPositiveButton(R.string.dialog_ok, new DialogInterface.OnClickListener() {
+ @Override
+ public void onClick(DialogInterface dialog, int which) {
+ String text = editText.getText().toString();
+ if (TextUtils.equals(text, password)) {
+ isAuthenticated = true;
+ } else {
+ Toast.makeText(mContext, R.string.password_error, Toast.LENGTH_SHORT).show();
+ }
+ }
+ })
+ .setNegativeButton(R.string.dialog_cancel, new DialogInterface.OnClickListener() {
+ @Override
+ public void onClick(DialogInterface dialog, int i) {
+ dialog.dismiss();
+ }
+ }).create();
+ mPasswordDialog.show();
+ return false;
+ }
+if (!TextUtils.equals(preference.getKey(), KEY_BUILD_NUMBER)) {return false;}
@@ -191,7 +226,6 @@ public class BuildNumberPreferenceController extends AbstractPreferenceControllePair.create(MetricsEvent.FIELD_SETTINGS_BUILD_NUMBER_DEVELOPER_MODE_ENABLED,1));}
- */return true;}弹窗预览：
密码通过下面属性配置：
ro.topband.password=123456
3、Android禁止非预装应用安装
禁止非预装应用安装，应用安装时提取文件包名，判断系统是否有预装此应用，如果没有预装则结束安装流程。此方案修改 PackageInstaller，不影响adb安装应用。
合入下面修改前请先合入 Android静默安装 这次修改，因为两者共用了从provider Uri中提取文件路径的方法。
diff --git a/packages/apps/PackageInstaller/src/com/android/packageinstaller/InstallStart.java b/packages/apps/Pac
index cbf8c41..2edf99b 100755
--- a/packages/apps/PackageInstaller/src/com/android/packageinstaller/InstallStart.java
+++ b/packages/apps/PackageInstaller/src/com/android/packageinstaller/InstallStart.java
@@ -116,6 +116,15 @@ public class InstallStart extends Activity {}}+ if (TextUtils.equals(SystemProperties.get("ro.unallow_install", "0"), "1")) {
+ if (!isPreInstallApp(path)) {
+ Log.w(LOG_TAG, "The app is not allowed to be installed without pre-installed.");
+ setResult(RESULT_CANCELED);
+ finish();
+ return;
+ }
+ }
+if (isSilentInstall(intent, path)) {Log.i(LOG_TAG, "silent install path: " + path);getPackageManager().installPackage(Uri.fromFile(new File(path)),
@@ -369,4 +378,29 @@ public class InstallStart extends Activity {Log.i(LOG_TAG, packageName + " silent installed.");}}
+
+ private boolean isPreInstallApp(String path) {
+ Log.i(LOG_TAG, "isPreInstallApp, path=" + path);
+
+ PackageInfo pi = null;
+ if (!TextUtils.isEmpty(path)) {
+ File sourceFile = new File(path);
+ PackageParser.Package parsed = PackageUtil.getPackageInfo(this, sourceFile);
+ if (parsed != null) {
+ PackageInfo pkgInfo = PackageParser.generatePackageInfo(parsed, null,
+ PackageManager.GET_PERMISSIONS, 0, 0, null,
+ new PackageUserState());
+ if (pkgInfo != null) {
+ try {
+ PackageManager pm = getApplicationContext().getPackageManager();
+ pi = pm.getPackageInfo(pkgInfo.packageName, 0);
+ } catch (Exception e) {
+ Log.w(LOG_TAG, "isPreInstallAPp, error: " + e.getMessage());
+ }
+ }
+ }
+ }
+
+ return (pi != null);
+ }}
属性：
# 禁止非预装应用安装，0：允许，1：禁止
ro.unallow_install=1
4、Android配置初始时间
Android默认初始时间是1970年，首次开机后通过网络同步时间。有时候我们期望默认时间为最近时间，因此通过下面修改来定制通过属性『ro.earliest_time』配置Android初始时间。
diff --git a/frameworks/base/services/java/com/android/server/SystemServer.java b/frameworks/base/services/java/co
index a7bc916..a96f881 100755
--- a/frameworks/base/services/java/com/android/server/SystemServer.java
+++ b/frameworks/base/services/java/com/android/server/SystemServer.java
@@ -50,6 +50,7 @@ import android.util.DisplayMetrics;import android.util.EventLog;import android.util.Slog;import android.view.WindowManager;
+import android.text.TextUtils;import com.android.internal.R;import com.android.internal.app.NightDisplayController;
@@ -145,7 +146,7 @@ public final class SystemServer {// The earliest supported time. We pick one day into 1970, to// give any timezone code room without going into negative time.
- private static final long EARLIEST_SUPPORTED_TIME = 86400 * 1000;
+ private static final long EARLIEST_SUPPORTED_TIME = 1577836800L * 1000; //2020-01-01 08:00:00 // 86400 * 1000/** Implementation class names. TODO: Move them to a codegen class or load
@@ -280,14 +281,6 @@ public final class SystemServer {private void run() {try {traceBeginAndSlog("InitBeforeStartServices");
- // If a device's clock is before 1970 (before 0), a lot of
- // APIs crash dealing with negative numbers, notably
- // java.io.File#setLastModified, so instead we fake it and
- // hope that time from cell towers or NTP fixes it shortly.
- if (System.currentTimeMillis() < EARLIEST_SUPPORTED_TIME) {
- Slog.w(TAG, "System clock is before 1970; setting to 1970.");
- SystemClock.setCurrentTimeMillis(EARLIEST_SUPPORTED_TIME);
- }//// Default the timezone property to GMT if not set.
@@ -393,6 +386,23 @@ public final class SystemServer {startCoreServices();startOtherServices();SystemServerInitThreadPool.shutdown();
+
+ // Modify by ayst.shen@foxmail.com, for configure the initial time.
+ // If a device's clock is before 1970 (before 0), a lot of
+ // APIs crash dealing with negative numbers, notably
+ // java.io.File#setLastModified, so instead we fake it and
+ // hope that time from cell towers or NTP fixes it shortly.
+ long earliestTime = EARLIEST_SUPPORTED_TIME;
+ String earliestTimeStr = SystemProperties.get("ro.earliest_time", "");
+ if (!TextUtils.isEmpty(earliestTimeStr)) {
+ earliestTime = Long.parseLong(earliestTimeStr);
+ }
+ Slog.i(TAG, "Earliest supported time: " + earliestTime);
+ if (System.currentTimeMillis() < earliestTime) {
+ Slog.w(TAG, "System clock is before 1970; setting to 1970.");
+ SystemClock.setCurrentTimeMillis(earliestTime);
+ }
+ // Modify the end} catch (Throwable ex) {Slog.e("System", "******************************************");Slog.e("System", "************ Failure starting system services", ex);
配置属性
通过 在线时间戳转换 工具将目标日期转为时间戳，比如日期：2020-01-01 08:00:00，转换为时间戳：1577836800000。
# 2020-01-01 08:00:00
ro.earliest_time=1577836800000
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