feat: add clear task (start fresh) option for lock task mode

app/src/main/java/com/bintianqi/owndroid/MyViewModel.kt

@@ -874,7 +874,7 @@ class MyViewModel(application: Application): AndroidViewModel(application) {
         getLockTaskPackages()
     }
     @RequiresApi(28)
-    fun startLockTaskMode(packageName: String, activity: String): Boolean {
+    fun startLockTaskMode(packageName: String, activity: String, clearTask: Boolean): Boolean {
         if (!DPM.isLockTaskPermitted(packageName)) {
             val list = lockTaskPackages.value.map { it.name } + packageName
             DPM.setLockTaskPackages(DAR, list.toTypedArray())
@@ -885,7 +885,10 @@ class MyViewModel(application: Application): AndroidViewModel(application) {
             Intent().setComponent(ComponentName(packageName, activity))
         } else PM.getLaunchIntentForPackage(packageName)
         if (intent != null) {
-            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK)
+            intent.addFlags(
+                Intent.FLAG_ACTIVITY_NEW_TASK
+                    or (if (clearTask) Intent.FLAG_ACTIVITY_CLEAR_TASK else 0)
+            )
             application.startActivity(intent, options.toBundle())
             application.startForegroundService(Intent(application, LockTaskService::class.java))
             return true

app/src/main/java/com/bintianqi/owndroid/dpm/System.kt

@@ -31,6 +31,7 @@ import androidx.compose.animation.AnimatedVisibility
 import androidx.compose.animation.animateContentSize
 import androidx.compose.foundation.background
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -1150,7 +1151,7 @@ fun NearbyStreamingPolicyScreen(
 fun LockTaskModeScreen(
     chosenPackage: Channel<String>, onChoosePackage: () -> Unit,
     lockTaskPackages: StateFlow<List<AppInfo>>, getLockTaskPackages: () -> Unit,
-    setLockTaskPackage: (String, Boolean) -> Unit, startLockTaskMode: (String, String) -> Boolean,
+    setLockTaskPackage: (String, Boolean) -> Unit, startLockTaskMode: (String, String, Boolean) -> Boolean,
     getLockTaskFeatures: () -> Int, setLockTaskFeature: (Int) -> String?, onNavigateUp: () -> Unit
 ) {
     val coroutine = rememberCoroutineScope()
@@ -1205,7 +1206,7 @@ fun LockTaskModeScreen(
 @RequiresApi(28)
 @Composable
 private fun StartLockTaskMode(
-    startLockTaskMode: (String, String) -> Boolean,
+    startLockTaskMode: (String, String, Boolean) -> Boolean,
     chosenPackage: Channel<String>, onChoosePackage: () -> Unit
 ) {
     val context = LocalContext.current
@@ -1214,6 +1215,8 @@ private fun StartLockTaskMode(
     var packageName by rememberSaveable { mutableStateOf("") }
     var activity by rememberSaveable { mutableStateOf("") }
     var specifyActivity by rememberSaveable { mutableStateOf(false) }
+    var clearTask by rememberSaveable { mutableStateOf(true) }
+
     LaunchedEffect(Unit) {
         packageName = chosenPackage.receive()
     }
@@ -1228,7 +1231,30 @@ private fun StartLockTaskMode(
         Row(
             Modifier
                 .fillMaxWidth()
-                .padding(vertical = 4.dp), verticalAlignment = Alignment.CenterVertically
+                .padding(top = 8.dp),
+            verticalAlignment = Alignment.CenterVertically
+        ) {
+            Checkbox(
+                checked = clearTask,
+                onCheckedChange = { clearTask = it }
+            )
+            Text(
+                text = stringResource(R.string.lock_task_mode_start_clear_task),
+                modifier = Modifier
+                    .padding(start = 8.dp)
+                    .clickable(
+                        indication = null,
+                        interactionSource = remember { MutableInteractionSource() }
+                    ) {
+                        clearTask = !clearTask
+                    }
+            )
+        }
+        Row(
+            Modifier
+                .fillMaxWidth()
+                .padding(bottom = 4.dp),
+            verticalAlignment = Alignment.CenterVertically
         ) {
             Checkbox(specifyActivity, {
                 specifyActivity = it
@@ -1249,7 +1275,7 @@ private fun StartLockTaskMode(
                 .fillMaxWidth()
                 .padding(bottom = 5.dp),
             onClick = {
-                val result = startLockTaskMode(packageName, activity)
+                val result = startLockTaskMode(packageName, activity, clearTask)
                 if (!result) context.showOperationResultToast(false)
             },
             enabled = packageName.isNotBlank() && (!specifyActivity || activity.isNotBlank())

app/src/main/res/values/strings.xml

@@ -732,4 +732,5 @@
     <string name="activate_method">Activate method</string>
     <string name="adb_command">ADB command</string>
     <string name="owndroid_warning">This app uses Device owner or Profile owner privileges. These privileges are extremely dangerous, please use them with caution. If used improperly, they may result in severe losses. The developers will not be responsible for this.</string>
+    <string name="lock_task_mode_start_clear_task">Clear task (start fresh)</string>
 </resources>