[manager]: show status of kernel

manager/app/src/main/java/me/weishu/kernelsu/Kernels.kt

@@ -0,0 +1,44 @@
+package me.weishu.kernelsu
+
+import android.system.Os
+
+/**
+ * @author weishu
+ * @date 2022/12/10.
+ */
+
+data class KernelVersion(val major: Int, val patchLevel: Int, val subLevel: Int) {
+    override fun toString(): String {
+        return "$major.$patchLevel.$subLevel"
+    }
+
+    fun isGKI(): Boolean {
+
+        // kernel 6.x
+        if (major > 5) {
+            return true
+        }
+
+        // kernel 5.10.x
+        if (major == 5) {
+            return patchLevel >= 10
+        }
+
+        return false
+    }
+}
+
+fun parseKernelVersion(version: String): KernelVersion {
+    val find = "(\\d+)\\.(\\d+)\\.(\\d+)".toRegex().find(version)
+    return if (find != null) {
+        KernelVersion(find.groupValues[1].toInt(), find.groupValues[2].toInt(), find.groupValues[3].toInt())
+    } else {
+        KernelVersion(-1, -1, -1)
+    }
+}
+
+fun getKernelVersion(): KernelVersion {
+    Os.uname().release.let {
+        return parseKernelVersion(it)
+    }
+}

manager/app/src/main/java/me/weishu/kernelsu/ui/screen/Home.kt

@@ -1,15 +1,16 @@
 import android.os.Build
 import android.system.Os
+import android.widget.Toast
 import androidx.compose.foundation.Image
 import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.*
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Done
-import androidx.compose.material.icons.filled.Warning
 import androidx.compose.material3.Card
+import androidx.compose.material3.Snackbar
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.res.painterResource
 import androidx.compose.ui.text.SpanStyle
 import androidx.compose.ui.text.buildAnnotatedString
 import androidx.compose.ui.text.font.FontWeight
@@ -17,6 +18,8 @@ import androidx.compose.ui.text.withStyle
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import me.weishu.kernelsu.Natives
+import me.weishu.kernelsu.R
+import me.weishu.kernelsu.getKernelVersion
 
 @Composable
 fun Info(label: String, value: String) {
@@ -37,15 +40,46 @@ fun Info(label: String, value: String) {
 @Composable
 fun Home() {
 
+    val statusIcon: Int
+    val statusText: String
+    val secondaryText: String
+
+    val kernelVersion = getKernelVersion()
     val isManager = Natives.becomeManager()
 
-    Column(modifier = Modifier.fillMaxWidth()) {
+    if (kernelVersion.isGKI()) {
+        // GKI kernel
+        if (isManager) {
+            statusIcon = R.drawable.ic_status_working
+            statusText = "Working"
+            secondaryText = "Version: ${Natives.getVersion()}"
+        } else {
+            statusIcon = R.drawable.ic_status_supported
+            statusText = "Not installed"
+            secondaryText = "Click to install"
+        }
+    } else {
+        statusIcon = R.drawable.ic_status_unsupported
+        statusText = "Unsupported kernel"
+        secondaryText = "KernelSU only supports GKI kernels now"
+    }
 
+    val context = LocalContext.current
+
+    Column(modifier = Modifier.fillMaxWidth()) {
         Card(
             modifier = Modifier
                 .fillMaxWidth()
                 .padding(6.dp)
-                .clickable { },
+                .clickable {
+                    if (kernelVersion.isGKI() && !isManager) {
+                        Toast.makeText(
+                            context,
+                            "Unimplemented",
+                            Toast.LENGTH_SHORT
+                        ).show()
+                    }
+                },
         ) {
             Row(
                 modifier = Modifier
@@ -53,7 +87,7 @@ fun Home() {
                     .padding(10.dp)
             ) {
                 Image(
-                    if (isManager) Icons.Filled.Done else Icons.Filled.Warning,
+                    painter = painterResource(id = statusIcon),
                     null,
                     modifier = Modifier
                         .size(64.dp)
@@ -64,13 +98,13 @@ fun Home() {
                         .padding(start = 10.dp),
                 ) {
                     Text(
-                        text = if (isManager) "Installed" else "Not Installed",
+                        text = statusText,
                         fontSize = 20.sp,
                         fontWeight = FontWeight.Bold
                     )
 
                     Text(
-                        text = if (isManager) "Version: ${Natives.getVersion()}" else "Click to Install",
+                        text = secondaryText,
                         fontSize = 15.sp,
                         fontWeight = FontWeight.Normal
                     )
@@ -104,7 +138,6 @@ fun Home() {
 
             }
         }
-
     }
 
 }

manager/app/src/main/res/drawable/ic_status_supported.xml

@@ -0,0 +1,7 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#000" android:pathData="M13,13H11V7H13M13,17H11V15H13M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10,10 0 0,0 12,2Z" />
+</vector>

manager/app/src/main/res/drawable/ic_status_unsupported.xml

@@ -0,0 +1,7 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#000" android:pathData="M12 2C17.5 2 22 6.5 22 12S17.5 22 12 22 2 17.5 2 12 6.5 2 12 2M12 4C10.1 4 8.4 4.6 7.1 5.7L18.3 16.9C19.3 15.5 20 13.8 20 12C20 7.6 16.4 4 12 4M16.9 18.3L5.7 7.1C4.6 8.4 4 10.1 4 12C4 16.4 7.6 20 12 20C13.9 20 15.6 19.4 16.9 18.3Z" />
+</vector>

manager/app/src/main/res/drawable/ic_status_working.xml

@@ -0,0 +1,7 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:height="24dp"
+    android:width="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24">
+    <path android:fillColor="#000" android:pathData="M10,17L5,12L6.41,10.58L10,14.17L17.59,6.58L19,8M12,2A10,10 0 0,0 2,12A10,10 0 0,0 12,22A10,10 0 0,0 22,12A10,10 0 0,0 12,2Z" />
+</vector>