现在会接收开机广播，并启动智慧食堂App了(而无需设置其为默认桌面)

app/src/main/AndroidManifest.xml

@@ -5,6 +5,7 @@
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.INTERNET" />
     <uses-permission android:name="android.permission.WRITE_SETTINGS" />
     <uses-permission android:name="android.permission.WRITE_SETTINGS" />
+    <uses-permission android:name="android.permission.INSTALL_PACKAGES" />
     <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
     <uses-permission android:name="android.permission.CHANGE_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />
@@ -21,6 +22,7 @@
         android:name=".RootApp"
         android:name=".RootApp"
         android:theme="@style/AppTheme">
         android:theme="@style/AppTheme">
         <activity android:name=".MainActivity"
         <activity android:name=".MainActivity"
+            android:launchMode="singleInstance"
             android:screenOrientation="landscape">
             android:screenOrientation="landscape">
             <intent-filter>
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <action android:name="android.intent.action.MAIN"/>
@@ -38,6 +40,16 @@
                 <data android:scheme="canteen"/>
                 <data android:scheme="canteen"/>
             </intent-filter>
             </intent-filter>
         </activity>
         </activity>
+        <receiver
+            android:name=".broadcast.BootBroadcast"
+            android:enabled="true"
+            android:exported="true"
+            android:permission="android.permission.RECEIVE_BOOT_COMPLETED">
+            <intent-filter android:priority="1000">
+                <category android:name="android.intent.category.DEFAULT" />
+                <action android:name="android.intent.action.BOOT_COMPLETED"/>
+            </intent-filter>
+        </receiver>
     </application>
     </application>
 
 
 </manifest>
 </manifest>
\ No newline at end of file

app/src/main/java/com/bgycc/smartcanteen/broadcast/BootBroadcast.java

+package com.bgycc.smartcanteen.broadcast;
+
+import android.annotation.SuppressLint;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+import com.bgycc.smartcanteen.MainActivity;
+
+public class BootBroadcast extends BroadcastReceiver {
+    @SuppressLint("UnsafeProtectedBroadcastReceiver")
+    @Override
+    public void onReceive(Context context, Intent intent) {
+        Intent scIntent = new Intent(context, MainActivity.class);
+        scIntent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
+        context.startActivity(scIntent);
+    }
+}