Android10.0(Q) 默认应用设置(电话、短信、浏览器、主屏幕应用）
有些时候系统里预装了两个电话、桌面这样的应用，开机启动后系统会弹框让你选择使用那一个。
在系统设置中应用和通知里发现有默认应用选项，点进去发现是在 PermissionController 中
默认列表界面
adb shell dumpsys window | findstr mCurrentFocus
mCurrentFocus=Window{ffb6aca u0 com.android.permissioncontroller/com.android.packageinstaller.role.ui.DefaultAppListActivity}
默认应用详情界面
adb shell dumpsys window | findstr mCurrentFocus
mCurrentFocus=Window{d2fceb3 u0 com.android.permissioncontroller/com.android.packageinstaller.role.ui.DefaultAppActivity}
点击 Preference 切换是最终调用的代码走到 setRoleHolderAsUser()
vendor\mediatek\proprietary\packages\apps\PermissionController\src\com\android\packageinstaller\role\ui\ManageRoleHolderStateLiveData.java
public void setRoleHolderAsUser(@NonNull String roleName, @NonNull String packageName,
boolean add, int flags, @NonNull UserHandle user, @NonNull Context context) {
if (getValue() != STATE_IDLE) {
Log.e(LOG_TAG, "Already (tried) managing role holders, requested role: " + roleName
+ ", requested package: " + packageName);
return;
}
if (DEBUG) {
Log.i(LOG_TAG, (add ? "Adding" : "Removing") + " package as role holder, role: "
+ roleName + ", package: " + packageName);
}
mLastPackageName = packageName;
mLastAdd = add;
mLastFlags = flags;
mLastUser = user;
setValue(STATE_WORKING);
RoleManager roleManager = context.getSystemService(RoleManager.class);
Executor executor = context.getMainExecutor();
Consumer<Boolean> callback = successful -> {
if (successful) {
if (DEBUG) {
Log.i(LOG_TAG, "Package " + (add ? "added" : "removed")
+ " as role holder, role: " + roleName + ", package: " + packageName);
}
setValue(STATE_SUCCESS);
} else {
if (DEBUG) {
Log.i(LOG_TAG, "Failed to " + (add ? "add" : "remove")
+ " package as role holder, role: " + roleName + ", package: "
+ packageName);
}
setValue(STATE_FAILURE);
}
};
if (add) {
roleManager.addRoleHolderAsUser(roleName, packageName, flags, user, executor, callback);
} else {
roleManager.removeRoleHolderAsUser(roleName, packageName, flags, user, executor,
callback);
}
}
核心方法就是这个，那我们就可以仿照它来了，在 PermissionController 中监听开机广播，直接调用改方法设置默认应用就好。
各默认应用对应的 roleName 如下，改造一下 setRoleHolderAsUser(),传递 roleName 和 packageName
电话
role: android.app.role.DIALER, package: com.android.dialer
短信
role: android.app.role.SMS, package: com.android.mms
主屏幕
role: android.app.role.HOME, package: com.android.launcher3
浏览器
role: android.app.role.BROWSER, package: com.android.browser
vendor\mediatek\proprietary\packages\apps\PermissionController\AndroidManifest.xml
<receiver android:name="com.android.packageinstaller.TemporaryFileManager"
android:exported="true">
<intent-filter>
<action android:name="android.intent.action.BOOT_COMPLETED" />
</intent-filter>
</receiver>
vendor\mediatek\proprietary\packages\apps\PermissionController\src\com\android\packageinstaller\TemporaryFileManager.java
package com.android.packageinstaller;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.os.SystemClock;
import android.util.Log;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import com.android.packageinstaller.permission.model.AppPermissionGroup;
import com.android.packageinstaller.permission.model.AppPermissions;
import com.android.packageinstaller.permission.model.Permission;
import com.android.packageinstaller.permission.utils.ArrayUtils;
import com.android.packageinstaller.permission.utils.Utils;
import java.util.List;
import java.io.File;
import java.io.IOException;
import android.app.role.RoleManager;
import android.os.UserHandle;
import android.os.Process;
import java.util.concurrent.Executor;
import java.util.function.Consumer;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
/**
* Manages files of the package installer and resets state during boot.
*/
public class TemporaryFileManager extends BroadcastReceiver {
private static final String LOG_TAG = TemporaryFileManager.class.getSimpleName();
private void setBootFlag(Context context, int flag){
SharedPreferences sharedPreferences = context.getSharedPreferences("boot_CONFIG",
Context.MODE_PRIVATE);
Editor editor = sharedPreferences.edit();
editor.putInt("boot_flag", flag).commit();
}
private boolean isFirstBoot(Context context){
SharedPreferences sharedPreferences = context.getSharedPreferences("boot_CONFIG",
Context.MODE_PRIVATE);
return sharedPreferences.getInt("boot_flag", 0) == 0;
}
@Override
public void onReceive(Context context, Intent intent) {
Log.e("permission", "action==="+ intent.getAction());
if (isFirstBoot(context)) {
setRoleHolderAsUser(context, "com.android.dialer");
setBootFlag(context, 1);
}
long systemBootTime = System.currentTimeMillis() - SystemClock.elapsedRealtime();
File[] filesOnBoot = context.getNoBackupFilesDir().listFiles();
if (filesOnBoot == null) {
return;
}
for (int i = 0; i < filesOnBoot.length; i++) {
File fileOnBoot = filesOnBoot[i];
if (systemBootTime > fileOnBoot.lastModified()) {
boolean wasDeleted = fileOnBoot.delete();
if (!wasDeleted) {
Log.w(LOG_TAG, "Could not delete " + fileOnBoot.getName() + " onBoot");
}
} else {
Log.w(LOG_TAG, fileOnBoot.getName() + " was created before onBoot broadcast was "
+ "received");
}
}
}
public void setRoleHolderAsUser(Context context, String packageName) {
String roleName = "android.app.role.DIALER";
boolean add = true;
int flags = 0;
UserHandle user = Process.myUserHandle();
Log.i("permission", (add ? "Adding" : "Removing") + " package as role holder, role: "
+ roleName + ", package: " + packageName);
RoleManager roleManager = context.getSystemService(RoleManager.class);
Executor executor = context.getMainExecutor();
Consumer<Boolean> callback = successful -> {
if (successful) {
Log.d("permission", "Package " + (add ? "added" : "removed")
+ " as role holder, role: " + roleName + ", package: " + packageName);
} else {
Log.d("permission", "Failed to " + (add ? "add" : "remove")
+ " package as role holder, role: " + roleName + ", package: "
+ packageName);
}
};
roleManager.addRoleHolderAsUser(roleName, packageName, flags, user, executor, callback);
Log.i("permission", "addRoleHolderAsUser done");
}
}