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Android – 永不锁屏,开机不锁屏,删除设置中休眠时间选项

2021-03-03 12:24 星期三 所属: 安卓教程 浏览:122

Android 绝不屏保,启动不屏保,删掉设定中休眠状态時间选择项

Android 6.0.1
Create:2016-02-29

1.Settings 删除显示屏关机选择项

packages/apps/Settings/res/xml/display_settings.xml

     <!-- Hide screen sleep
     <ListPreference
             android:key="screen_timeout"
             android:title="@string/screen_timeout"
             android:summary="@string/screen_timeout_summary"
             android:persistent="false"
             android:entries="@array/screen_timeout_entries"
             android:entryValues="@array/screen_timeout_values" /> -->

注解掉这一ListPreference

packages/apps/Settings/src/com/android/settings/DisplaySettings.java
加上if标准,要是没有寻找这一preference也不实行有关实际操作;实际能够参照被掩藏的 night_mode

        mScreenTimeoutPreference = (ListPreference) findPreference(KEY_SCREEN_TIMEOUT);
        if (mScreenTimeoutPreference !=null ) {
            final long currentTimeout = Settings.System.getLong(resolver, SCREEN_OFF_TIMEOUT,
                    FALLBACK_SCREEN_TIMEOUT_VALUE);
            mScreenTimeoutPreference.setValue(String.valueOf(currentTimeout));
            mScreenTimeoutPreference.setOnPreferenceChangeListener(this);
            disableUnusableTimeouts(mScreenTimeoutPreference);
            updateTimeoutPreferenceDescription(currentTimeout);
        }

2.严禁屏保

frameworks/base/packages/SettingsProvider/res/values/defaults.xml
<bool name="def_lockscreen_disabled">false</bool> 改成 true;即默认设置严禁屏保

frameworks/base/core/res/res/values/config.xml
<integer name="config_multiuserMaximumUsers">1</integer> 不允许多客户;即较大 用户量为1

各自编译程序frameworks/base/packages/SettingsProvider 与 frameworks/base
编译程序后push 到 system/priv-app/SettingsProvider/SettingsProvider.apk system/framework/framework.jar
删除设备中相匹配的oat文件目录。重新启动或修复系统恢复。第一次启动时,会先出現status bar,launcher要等一会才出去。
以后重新启动就可以直接进入launcher。设备会默认设置不屏保。但依然会进到sleep情况。


源代码步骤:

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

if (upgradeVersion == 54)// 版本号为54才会设定timeout
......
    private void upgradeScreenTimeoutFromNever(SQLiteDatabase db) {
        // See if the timeout is -1 (for "Never").
        Cursor c = db.query(TABLE_SYSTEM, new String[] { "_id", "value" }, "name=? AND value=?",
                new String[] { Settings.System.SCREEN_OFF_TIMEOUT, "-1" },
                null, null, null);

        SQLiteStatement stmt = null;
        if (c.getCount() > 0) {
            c.close();
            try {
                stmt = db.compileStatement("INSERT OR REPLACE INTO system(name,value)"
                          " VALUES(?,?);");

                // Set the timeout to 30 minutes in milliseconds
                loadSetting(stmt, Settings.System.SCREEN_OFF_TIMEOUT,
                        Integer.toString(30 * 60 * 1000));
            } finally {
                if (stmt != null) stmt.close();
            }
        } else {
            c.close();
        }
    }
    ......
            if (SystemProperties.getBoolean("ro.lockscreen.disable.default", false) == true) {
                loadSetting(stmt, Settings.System.LOCKSCREEN_DISABLED, "1");
            } else {
                loadBooleanSetting(stmt, Settings.System.LOCKSCREEN_DISABLED,
                        R.bool.def_lockscreen_disabled);
            }

timeout若是-1,则绝不屏保
载入"ro.lockscreen.disable.default",假如默认设置为true,则设定严禁屏保;不然从xml中读配备

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

    <integer name="def_screen_off_timeout">60000</integer>

    <bool name="def_lockscreen_disabled">false</bool>`

严禁屏保默认设置为false

 

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