android 4.2 修改默锁屏为无

最新推荐文章于 2025-09-12 11:30:00 发布

原创最新推荐文章于 2025-09-12 11:30:00 发布 · 755 阅读

0 ·

CC 4.0 BY-SA版权

android 同时被 2 个专栏收录

146 篇文章

订阅专栏

android-framework

134 篇文章

订阅专栏

本文介绍如何通过修改系统属性及数据库设置来实现Android设备锁屏功能的默认禁用。通过在build.prop文件中添加特定属性，并在LockSettingsService中进行数据库初始化设置，可以改变锁屏的默认状态。

在系统build.prop中添加以下属性

ro.lockscreen.disable.default=true

 
frameworks/base/core/java/com/android/internal/widget/LockSettingsService.java


   class DatabaseHelper extends SQLiteOpenHelper {
        private static final String TAG = "LockSettingsDB";
        private static final String DATABASE_NAME = "locksettings.db";

        private static final int DATABASE_VERSION = 1;

        public DatabaseHelper(Context context) {
            super(context, DATABASE_NAME, null, DATABASE_VERSION);
            setWriteAheadLoggingEnabled(true);
        }

        private void createTable(SQLiteDatabase db) {
            db.execSQL("CREATE TABLE " + TABLE + " (" +
                    "_id INTEGER PRIMARY KEY AUTOINCREMENT," +
                    COLUMN_KEY + " TEXT," +
                    COLUMN_USERID + " INTEGER," +
                    COLUMN_VALUE + " TEXT" +
                    ");");
        }

        @Override
        public void onCreate(SQLiteDatabase db) {
            createTable(db);
            initializeDefaults(db);
        }

        private void initializeDefaults(SQLiteDatabase db) {
            // Get the lockscreen default from a system property, if available
            boolean lockScreenDisable = SystemProperties.getBoolean("ro.lockscreen.disable.default",
                    false);//在这里会去读默认值
            if (lockScreenDisable) {
                writeToDb(db, LockPatternUtils.DISABLE_LOCKSCREEN_KEY, "1", 0);
            }
        }

        @Override
        public void onUpgrade(SQLiteDatabase db, int oldVersion, int currentVersion) {
            // Nothing yet
        }
    }

android 4.1修改:

frameworks/base/packages/SettingsProvider/res/values/defaults.xml