【Notification】屏蔽特定应用的通知提示

时间:2022-08-31 14:19:32

须要默认屏蔽特定app的通知提示

设置app是否接收通知的界面

点击每一个条目进去的界面

【Notification】屏蔽特定应用的通知提示【Notification】屏蔽特定应用的通知提示

AppNotificationSettings extends SettingsPreferenceFragment
private SwitchPreference mBlock; //条目通过Preference设置
mBlock.setChecked(mAppRow.banned); mBlock.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
@Override
public boolean onPreferenceChange(Preference preference, Object newValue) {
final boolean block = (Boolean) newValue;
return mBackend.setNotificationsBanned(pkg, uid, block);
}
}); // Users cannot block notifications from system/signature packages
//通过工具类推断app是系统包(如计算器)时移除设置通知设置的preference
if (Utils.isSystemPackage(pm, info)) {
getPreferenceScreen().removePreference(mBlock);
mPriority.setDependency(null); // don't have it depend on a preference that's gone
}

通过对Block的当前状态通过mAppRow设置

对preference状态的监听,通过mBackend实现

import com.android.settings.notification.NotificationAppList.AppRow;

import com.android.settings.notification.NotificationAppList.Backend;

查看NotificationAppList.java

    //对AppRow中的属性进行初始化
public static AppRow loadAppRow(PackageManager pm, ApplicationInfo app,
Backend backend) {
final AppRow row = new AppRow();
row.pkg = app.packageName;
row.uid = app.uid;
try {
row.label = app.loadLabel(pm);
} catch (Throwable t) {
Log.e(TAG, "Error loading application label for " + row.pkg, t);
row.label = row.pkg;
}
row.icon = app.loadIcon(pm);
row.banned = backend.getNotificationsBanned(row.pkg, row.uid);// 是否禁止通知
row.priority = backend.getHighPriority(row.pkg, row.uid);
row.sensitive = backend.getSensitive(row.pkg, row.uid);
return row;
}

【Notification】屏蔽特定应用的通知提示

查看INotificationManager接口

find frameworks/ -name “INotification*”

frameworks/support/v4/java/android/support/v4/app/INotificationSideChannel.aidl

frameworks/base/core/java/com/mediatek/common/mom/INotificationListener.aidl

frameworks/base/core/java/android/app/INotificationManager.aidl

frameworks/base/core/java/android/service/notification/INotificationListener.aidl

.aidl文件(接口定义语言,用于进程间通讯)

frameworks/base/core/java/android/app/INotificationManager.aidl

实现的service路径为

frameworks\base\services\java\com\android\server\NotificationManagerService.java

对接受Notification属性的获取

【Notification】屏蔽特定应用的通知提示

【Notification】屏蔽特定应用的通知提示

【Notification】屏蔽特定应用的通知提示

mService的类型IAppOpsService

frameworks/base/core/java/com/android/internal/app/IAppOpsService.aidl

frameworks/base/services/core/java/com/android/server/AppOpsService.java

返回的值为MODE_IGNORED时,boolean areNotificationsEnabledForPackage(String pkg, int uid)会返回false

mService.checkOperation(op, uid, packageName) = MODE_ALLOWED时。则同意接收通知 ;

【Notification】屏蔽特定应用的通知提示

对接受Notification的属性设置

@Override
public void setNotificationsEnabledForPackage(String pkg, int uid, boolean enabled) {
checkCallerIsSystem(); setNotificationsEnabledForPackageImpl(pkg, uid, enabled);
}

【Notification】屏蔽特定应用的通知提示

AppOpsManager的路径:frameworks/base/core/java/android/app/AppOpsManager.java

【Notification】屏蔽特定应用的通知提示

public static final int OP_POST_NOTIFICATION = 11;

uid = app.uid

pkg = app.packageName;

mode = enabled?AppOpsManager.MODE_ALLOWED:AppOpsManager.MODE_IGNORED

【Notification】屏蔽特定应用的通知提示

查看代码中哪些位置调用了setNotificationsEnabledForPackageImpl方法

【Notification】屏蔽特定应用的通知提示

除此处还有两处都是对方法的重写与详细实现

【Notification】屏蔽特定应用的通知提示

【Notification】屏蔽特定应用的通知提示

详细解决步骤

当须要屏蔽全部应用通知没有例外时

在AppOpsManager中有关于app很多參数设置的默认值,比方图中第十二个就是默认对app的通知开启或关闭。AppOpsService中的checkOperation方法下就进行了推断。当op为空时。返回的时默认的MODE。

所以讲原本的MODE_ALLOWED改为MODE_IGNORED后。编译frameworks/base后push进手机重新启动就会发现全部app全部被屏蔽通知没有例外。

当有特定的app须要开启通知时,我们能够在checkOperation中进行改动。

【Notification】屏蔽特定应用的通知提示

   @Override
public int checkOperation(int code, int uid, String packageName) {
verifyIncomingUid(uid);
verifyIncomingOp(code);
synchronized (this) {
if (isOpRestricted(uid, code, packageName)) {
return AppOpsManager.MODE_IGNORED;
}
Op op = getOpLocked(AppOpsManager.opToSwitch(code), uid, packageName, false);
if (op == null) {
return AppOpsManager.opToDefaultMode(code);
}
return op.mode;
}
}

在checkOperation中进行推断时须要推断code值。否则easy出现点击重新启动的状况。改动后代码例如以下。

public int checkOperation(int code, int uid, String packageName) {
verifyIncomingUid(uid);
verifyIncomingOp(code);
synchronized (this) {
//chenzilong add for ZELY-41 block app notifications 20160331 start
if(code == AppOpsManager.OP_POST_NOTIFICATION){
if ((packageName.equals("com.advan.advanstore")||packageName.equals("com.stkj.android.freeshare"))){
return AppOpsManager.MODE_ALLOWED;
}else{
return AppOpsManager.MODE_IGNORED;
}
}
// chenzilong add for ZELY-41 block app notifications 20160331 end if (isOpRestricted(uid, code, packageName)) {
return AppOpsManager.MODE_IGNORED;
}
Op op = getOpLocked(AppOpsManager.opToSwitch(code), uid, packageName, false);
if (op == null) {
return AppOpsManager.opToDefaultMode(code);
}
return op.mode;
}

【Notification】屏蔽特定应用的通知提示

最后的实现结果