Android10 framework实现所有APP全屏
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文章目录
- 前言
- 一、adb命令可以实现
- 二、修改思路
-
- 1.思考adb是怎么修改的
- 2.修改方式
- 总结
前言
有些特殊安卓设备，需要让所有app是全屏的，隐藏systemui，可以在framework层修改
一、adb命令可以实现
adb 实现沉浸式状态栏 导航栏
adb shell settings put global policy_control immersive.full=*
immersive.full这个属性可以去下面的PolicyControl.java里面看一下，还有其他几个
alps/frameworks/base/services/core/java/com/android/server/wm/PolicyControl.java b/alps/frameworks/base/services/core/java/com/android/server/wm/PolicyControl.java
我们还可以单独控制哪些app不沉浸，其他程序沉浸：
adb shell settings put global policy_control immersive.full=apps,-com.xxx.xxx
如果想恢复到原来，运行下面的代码：
adb shell settings put global policy_control null
二、修改思路
1.思考adb是怎么修改的
adb shell settings put global policy_control immersive.full=*
这里很明显是修改settings的数据库，在framework目录下全局搜一下policy_control
alps/frameworks$ grep policy_control ./* -rns
./base/core/java/android/provider/Settings.java:13180: public static final String POLICY_CONTROL = "policy_control";
得到POLICY_CONTROL 关键字，继续全局搜，看哪些类引用了
alps/frameworks$ grep POLICY_CONTROL ./* -rnw
./base/packages/SettingsProvider/src/com/android/providers/settings/SettingsProtoDumpUtil.java:1142: Settings.Global.POLICY_CONTROL,
./base/packages/SettingsProvider/src/com/android/providers/settings/SettingsProtoDumpUtil.java:1143: GlobalSettingsProto.POLICY_CONTROL);
./base/config/hiddenapi-greylist-max-o.txt:60473:Landroid/provider/Settings$Global;->POLICY_CONTROL:Ljava/lang/String;
./base/services/core/java/com/android/server/wm/PolicyControl.java:38: * Control by setting {@link Settings.Global#POLICY_CONTROL} to one or more name-value pairs.
./base/services/core/java/com/android/server/wm/PolicyControl.java:135: Settings.Global.POLICY_CONTROL,
./base/services/core/java/com/android/server/wm/WindowManagerService.java:719: Settings.Global.getUriFor(Settings.Global.POLICY_CONTROL);
./base/core/tests/coretests/src/android/provider/SettingsBackupTest.java:395: Settings.Global.POLICY_CONTROL,
./base/core/java/android/provider/Settings.java:13180: public static final String POLICY_CONTROL = "policy_control";
看到关键使用部分了
PolicyControl类和WindowManagerService类。继续分析，下面只贴一部分关键代码
这里有POLICY_CONTROL的uri，代码监听了值的变化
private final Uri mImmersiveModeConfirmationsUri =
Settings.Secure.getUriFor(Settings.Secure.IMMERSIVE_MODE_CONFIRMATIONS);
private final Uri mPolicyControlUri =
Settings.Global.getUriFor(Settings.Global.POLICY_CONTROL);
下面updateSystemUiSettings是变化后的监听
@Override
public void onChange(boolean selfChange, Uri uri) {
if (uri == null) {
return;
}
if (mImmersiveModeConfirmationsUri.equals(uri) || mPolicyControlUri.equals(uri)) {
updateSystemUiSettings();
return;
}
看看updateSystemUiSettings做了什么，和哪些位置引用了
void updateSystemUiSettings() {
boolean changed;
synchronized (mGlobalLock) {
changed = ImmersiveModeConfirmation.loadSetting(mCurrentUserId, mContext)
|| PolicyControl.reloadFromSetting(mContext);
}
if (changed) {
updateRotation(false /* alwaysSendConfiguration */, false /* forceRelayout */);
}
}
在systemReady方法中引用了 ，这里很重要，表明开机就会运行一次
UiThread.getHandler().post(mSettingsObserver::updateSystemUiSettings);
关键位置 PolicyControl.reloadFromSetting(mContext);
static boolean reloadFromSetting(Context context) {
if (DEBUG) Slog.d(TAG, "reloadFromSetting()");
String value = null;
try {
value = Settings.Global.getStringForUser(context.getContentResolver(),
Settings.Global.POLICY_CONTROL,
UserHandle.USER_CURRENT);
if (sSettingValue == value || sSettingValue != null && sSettingValue.equals(value)) {
return false;
}
setFilters(value);
sSettingValue = value;
} catch (Throwable t) {
Slog.w(TAG, "Error loading policy control, value=" + value, t);
return false;
}
return true;
}
这里就是读取settings数据库中的值了
2.修改方式
继续分析reloadFromSetting，读取到值后做了什么，setFilters(value);
sImmersiveStatusFilter ，sImmersiveNavigationFilter 这两个就是对应状态栏和导航栏全屏的过滤，
可以看上面的getSystemUiVisibility方法和getWindowFlags方法
private static void setFilters(String value) {
if (DEBUG) Slog.d(TAG, "setFilters: " + value);
sImmersiveStatusFilter = null;
sImmersiveNavigationFilter = null;
sImmersivePreconfirmationsFilter = null;
if (value != null) {
String[] nvps = value.split(":");
for (String nvp : nvps) {
int i = nvp.indexOf('=');
if (i == -1) continue;
String n = nvp.substring(0, i);
String v = nvp.substring(i + 1);
if (n.equals(NAME_IMMERSIVE_FULL)) {
Filter f = Filter.parse(v);
sImmersiveStatusFilter = sImmersiveNavigationFilter = f;
if (sImmersivePreconfirmationsFilter == null) {
sImmersivePreconfirmationsFilter = f;
}
} else if (n.equals(NAME_IMMERSIVE_STATUS)) {
Filter f = Filter.parse(v);
sImmersiveStatusFilter = f;
} else if (n.equals(NAME_IMMERSIVE_NAVIGATION)) {
Filter f = Filter.parse(v);
sImmersiveNavigationFilter = f;
if (sImmersivePreconfirmationsFilter == null) {
sImmersivePreconfirmationsFilter = f;
}
} else if (n.equals(NAME_IMMERSIVE_PRECONFIRMATIONS)) {
Filter f = Filter.parse(v);
sImmersivePreconfirmationsFilter = f;
}
}
}
if (DEBUG) {
Slog.d(TAG, "immersiveStatusFilter: " + sImmersiveStatusFilter);
Slog.d(TAG, "immersiveNavigationFilter: " + sImmersiveNavigationFilter);
Slog.d(TAG, "immersivePreconfirmationsFilter: " + sImmersivePreconfirmationsFilter);
}
}
继续看关键解析部分 Filter f = Filter.parse(v); Filter类定义再最下面，这种一看就明白，一个白名单，一个黑名单，判断哪些包名能不能全屏，关注这句代码
boolean isApp = attrs.type >= WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW
&& attrs.type <= WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
字面意思，判断是不是app，这里我暂时没有研究过，但是想到有一些服务是没有界面的。可能是比如输入法之类的，可能是这种的判断，获取是判断当前窗口 ，参考下面的链接
https://blog.csdn.net/u012739527/article/details/124011617
private static class Filter {
private static final String ALL = "*";
private static final String APPS = "apps";
private final ArraySet<String> mWhitelist;
private final ArraySet<String> mBlacklist;
private Filter(ArraySet<String> whitelist, ArraySet<String> blacklist) {
mWhitelist = whitelist;
mBlacklist = blacklist;
}
boolean matches(LayoutParams attrs) {
if (attrs == null) return false;
boolean isApp = attrs.type >= WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW
&& attrs.type <= WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
if (isApp && mBlacklist.contains(APPS)) return false;
if (onBlacklist(attrs.packageName)) return false;
if (isApp && mWhitelist.contains(APPS)) return true;
return onWhitelist(attrs.packageName);
}
boolean matches(String packageName) {
return !onBlacklist(packageName) && onWhitelist(packageName);
}
private boolean onBlacklist(String packageName) {
return mBlacklist.contains(packageName) || mBlacklist.contains(ALL);
}
private boolean onWhitelist(String packageName) {
return mWhitelist.contains(ALL) || mWhitelist.contains(packageName);
}
void dump(PrintWriter pw) {
pw.print("Filter[");
dump("whitelist", mWhitelist, pw); pw.print(',');
dump("blacklist", mBlacklist, pw); pw.print(']');
}
private void dump(String name, ArraySet<String> set, PrintWriter pw) {
pw.print(name); pw.print("=(");
final int n = set.size();
for (int i = 0; i < n; i++) {
if (i > 0) pw.print(',');
pw.print(set.valueAt(i));
}
pw.print(')');
}
@Override
public String toString() {
StringWriter sw = new StringWriter();
dump(new PrintWriter(sw, true));
return sw.toString();
}
// value = comma-delimited list of tokens, where token = (package name|apps|*)
// e.g. "com.package1", or "apps, com.android.keyguard" or "*"
static Filter parse(String value) {
if (value == null) return null;
ArraySet<String> whitelist = new ArraySet<String>();
ArraySet<String> blacklist = new ArraySet<String>();
for (String token : value.split(",")) {
token = token.trim();
if (token.startsWith("-") && token.length() > 1) {
token = token.substring(1);
blacklist.add(token);
} else {
whitelist.add(token);
}
}
return new Filter(whitelist, blacklist);
}
}
到这里修改就简单了，只需要在开机之前给赋值就行，然后第一次要加载这个值，可以在SettingsProvider中修改
diff --git a/alps/vendor/mediatek/proprietary/packages/apps/SettingsProvider/res/values/defaults.xml b/alps/vendor/mediatek/proprietary/packages/apps/SettingsProvider/res/values/defaults.xml
@@ -56,6 +56,8 @@
<string name="default_input_method" translatable="false">com.sohu.inputmethod.sogou.tv/.SogouIME</string>
<string name="enabled_input_methods" translatable="false">com.sohu.inputmethod.sogou.tv/.SogouIME</string>
+
+ <string name="def_policy_str" translatable="false">immersive.full=*</string>
<!-- Default value for whether or not to pulse the notification LED when there is a
diff --git a/alps/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java b/alps/vendor/mediatek/proprietary/packages/apps/SettingsProvider/src/com/android/providers/settings/DatabaseHelper.java
@@ -2470,7 +2470,10 @@ class DatabaseHelper extends SQLiteOpenHelper {
try {
stmt = db.compileStatement("INSERT OR IGNORE INTO global(name,value)"
+ " VALUES(?,?);");
-
+
+ loadStringSetting(stmt, Settings.Global.POLICY_CONTROL,
+ R.string.def_policy_str);
+
// --- Previously in 'system'
loadBooleanSetting(stmt, Settings.Global.AIRPLANE_MODE_ON,
R.bool.def_airplane_mode_on);
还可以在中PolicyControl 多修改一处，if (isApp) return true;这个判断，只要是app，全部全屏，
但是上面的SettingsProvider的值仍要修改，因为在reloadFromSetting中有判空
class PolicyControl {
if (attrs == null) return false;
boolean isApp = attrs.type >= WindowManager.LayoutParams.FIRST_APPLICATION_WINDOW
&& attrs.type <= WindowManager.LayoutParams.LAST_APPLICATION_WINDOW;
+ if (isApp) return true;
if (isApp && mBlacklist.contains(APPS)) return false;
if (onBlacklist(attrs.packageName)) return false;
if (isApp && mWhitelist.contains(APPS)) return true;
总结
简单来说就是修改Settings.Global.POLICY_CONTROL中的值，如果有部分白名单的，可以只添加一部分app的包名，目前的修改是基于Android10的