Android 永不鎖屏楞件，開機不鎖屏衫生，刪除設置中休眠時間選項
Android 6.0.1
1.Settings 刪掉屏幕待機選項
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" /> -->
注釋掉這個ListPreference
packages/apps/Settings/src/com/android/settings/DisplaySettings.java
添加if條件，如果沒有找到這個preference就不執(zhí)行相關操作土浸；具體可以參考被隱藏的 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.禁止鎖屏
frameworks/base/packages/SettingsProvider/res/values/defaults.xml
<bool name="def_lockscreen_disabled">false</bool> 改為 true罪针；即默認禁止鎖屏
frameworks/base/core/res/res/values/config.xml
<integer name="config_multiuserMaximumUsers">1</integer> 不允許多用戶；即最大用戶數為1
分別編譯frameworks/base/packages/SettingsProvider 與 frameworks/base
編譯后push 到 system/priv-app/SettingsProvider/SettingsProvider.apk system/framework/framework.jar
刪去機器中對應的oat目錄黄伊。重啟或恢復出廠設置泪酱。第一次開機時，會先出現status bar还最，launcher要等一會才出來墓阀。
之后重啟就可以直接進入launcher。機器會默認不鎖屏拓轻。但還是會進入sleep狀態(tài)斯撮。
源碼流程：
frameworks/base/packages/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
if (upgradeVersion == 54)// 版本為54才會設置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，則永不鎖屏
讀取"ro.lockscreen.disable.default"扶叉，如果默認為true勿锅，則設置禁止鎖屏；否則從xml中讀配置
frameworks/base/packages/SettingsProvider/res/values/defaults.xml
<integer name="def_screen_off_timeout">60000</integer>
<bool name="def_lockscreen_disabled">false</bool>`
禁止鎖屏默認為false
