Add back BootJobService

app/src/main/java/com/termux/boot/BootJobService.java

@@ -0,0 +1,51 @@
+package com.termux.boot;
+
+import android.app.job.JobParameters;
+import android.app.job.JobService;
+import android.content.Context;
+import android.content.Intent;
+import android.net.Uri;
+import android.os.Build;
+import android.os.PersistableBundle;
+import android.util.Log;
+
+public class BootJobService extends JobService {
+
+    public static final String SCRIPT_FILE_PATH = "com.termux.boot.script_path";
+
+    private static final String TAG = "termux";
+
+    // Constants from TermuxService.
+    private static final String TERMUX_SERVICE = "com.termux.app.TermuxService";
+    private static final String ACTION_EXECUTE = "com.termux.service_execute";
+    private static final String EXTRA_EXECUTE_IN_BACKGROUND = "com.termux.execute.background";
+
+    @Override
+    public boolean onStartJob(JobParameters params) {
+        Log.i(TAG, "Executing job " + params.getJobId() + ".");
+
+        PersistableBundle extras = params.getExtras();
+        String filePath = extras.getString(SCRIPT_FILE_PATH);
+
+        Uri scriptUri = new Uri.Builder().scheme("com.termux.file").path(filePath).build();
+        Intent executeIntent = new Intent(ACTION_EXECUTE, scriptUri);
+        executeIntent.setClassName("com.termux", TERMUX_SERVICE);
+        executeIntent.putExtra(EXTRA_EXECUTE_IN_BACKGROUND, true);
+
+        Context context = getApplicationContext();
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            // https://developer.android.com/about/versions/oreo/background.html
+            context.startForegroundService(executeIntent);
+        } else {
+            context.startService(executeIntent);
+        }
+
+        return false; // offloaded to Termux; job is done
+    }
+
+    @Override
+    public boolean onStopJob(JobParameters params) {
+        Log.i(TAG, "Execution of job " + params.getJobId() + " has been cancelled.");
+        return false; // do not reschedule
+    }
+}