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App 2.19.2: Full screen for CarPlay (experiment)

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Adds com.allgo.carplay.service to immersive.full in Android 9's
policy_control setting when switched on, removes only that entry when
off. Car build (system user) only.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01LhzAVaUyqcw5PkGjz4mWW6
This commit is contained in:
nils
2026-10-23 20:50:35 +02:00
co-authored by Claude Opus 5.5
parent 209a231511
commit 50217aef74
10 changed files with 219 additions and 14 deletions
Download Patch File Download Diff File Expand all files Collapse all files
app/src/main/java/com/evsuite/abrp/MainActivity.java
+51
View File
@@ -1066,6 +1066,56 @@ public class MainActivity extends AppCompatActivity {
// ---------- Upload page ----------
/** The car's CarPlay app, as the Logs tab's foreground list showed it on SWI68. */
private static final String CARPLAY_PACKAGE = "com.allgo.carplay.service";
/**
* Experiment: forces CarPlay into immersive mode through Android 9's policy_control setting.
* The switch shows what the setting holds, not a preference, and switching off removes only
* our entry. Writing it needs WRITE_SECURE_SETTINGS, which only the car build (system user)
* has; elsewhere the switch is disabled.
*/
private void bindCarPlayFullScreen() {
com.google.android.material.switchmaterial.SwitchMaterial sw =
settingsPane.findViewById(R.id.carplay_full_screen_switch);
boolean mayWrite = checkSelfPermission(android.Manifest.permission.WRITE_SECURE_SETTINGS)
== android.content.pm.PackageManager.PERMISSION_GRANTED;
String current = android.provider.Settings.Global.getString(getContentResolver(), PolicyControl.KEY);
sw.setOnCheckedChangeListener(null);
sw.setChecked(PolicyControl.hasFull(current, CARPLAY_PACKAGE));
sw.setEnabled(mayWrite);
if (!mayWrite) {
((TextView) settingsPane.findViewById(R.id.carplay_full_screen_hint))
.setText(R.string.hint_carplay_full_screen_unavailable);
return;
}
sw.setOnCheckedChangeListener((btn, checked) -> diagReader.execute(() -> {
boolean ok;
try {
android.content.ContentResolver cr = getContentResolver();
String before = android.provider.Settings.Global.getString(cr, PolicyControl.KEY);
String after = checked ? PolicyControl.withFull(before, CARPLAY_PACKAGE)
: PolicyControl.withoutFull(before, CARPLAY_PACKAGE);
android.provider.Settings.Global.putString(cr, PolicyControl.KEY, after);
String now = android.provider.Settings.Global.getString(cr, PolicyControl.KEY);
ok = PolicyControl.hasFull(now, CARPLAY_PACKAGE) == checked;
android.util.Log.i("EVABRP.Settings", "policy_control " + (checked ? "on" : "off") + ": " + now);
} catch (RuntimeException e) {
android.util.Log.w("EVABRP.Settings", "policy_control not written", e);
ok = false;
}
final boolean written = ok;
runOnUiThread(() -> {
if (isDestroyed()) return;
if (!written) {
Toast.makeText(this, R.string.carplay_full_screen_failed, Toast.LENGTH_LONG).show();
bindCarPlayFullScreen();
}
refreshForeground();
});
}));
}
private void bindServicePane() {
voiceKeySwitch = settingsPane.findViewById(R.id.voice_key_switch);
voiceKeySwitch.setChecked(UploadSettings.voiceKeyOpensApp(prefs));
@@ -1079,6 +1129,7 @@ public class MainActivity extends AppCompatActivity {
prefs.edit().putBoolean(UploadSettings.KEY_FULL_SCREEN, checked).apply();
applyFullScreen();
});
bindCarPlayFullScreen();
liveTelemetrySwitch = servicePane.findViewById(R.id.abrp_upload_switch);
intervalChoices = servicePane.findViewById(R.id.interval_choices);
boostSwitch = servicePane.findViewById(R.id.boost_switch);
app/src/main/java/com/evsuite/abrp/PolicyControl.java
+79
View File
@@ -0,0 +1,79 @@
package com.evsuite.abrp;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
/**
* The value of Android 9's {@code policy_control} global setting, which forces other apps into
* immersive mode: {@code immersive.full=pkg1,pkg2:immersive.status=pkg3}. This adds or removes
* one package in {@code immersive.full} and leaves every other entry as it was, so switching
* our experiment off restores what was there before. Pure Java, so it is unit-tested.
*/
final class PolicyControl {
static final String KEY = "policy_control";
static final String FULL = "immersive.full";
private PolicyControl() {}
/** Whether {@code pkg} is named in {@code immersive.full}. */
static boolean hasFull(String value, String pkg) {
List<String> list = parse(value).get(FULL);
return list != null && list.contains(pkg);
}
/** {@code value} with {@code pkg} added to {@code immersive.full}. */
static String withFull(String value, String pkg) {
Map<String, List<String>> map = parse(value);
List<String> list = map.get(FULL);
if (list == null) {
list = new ArrayList<>();
map.put(FULL, list);
}
if (!list.contains(pkg)) list.add(pkg);
return format(map);
}
/** {@code value} without {@code pkg} in {@code immersive.full}; null when nothing is left. */
static String withoutFull(String value, String pkg) {
Map<String, List<String>> map = parse(value);
List<String> list = map.get(FULL);
if (list != null) {
list.remove(pkg);
if (list.isEmpty()) map.remove(FULL);
}
return format(map);
}
private static Map<String, List<String>> parse(String value) {
Map<String, List<String>> map = new LinkedHashMap<>();
if (value == null) return map;
for (String part : value.split(":")) {
int eq = part.indexOf('=');
if (eq <= 0) continue;
String name = part.substring(0, eq).trim();
List<String> list = map.get(name);
if (list == null) {
list = new ArrayList<>();
map.put(name, list);
}
for (String p : part.substring(eq + 1).split(",")) {
String t = p.trim();
if (!t.isEmpty() && !list.contains(t)) list.add(t);
}
}
return map;
}
private static String format(Map<String, List<String>> map) {
StringBuilder sb = new StringBuilder();
for (Map.Entry<String, List<String>> e : map.entrySet()) {
if (e.getValue().isEmpty()) continue;
if (sb.length() > 0) sb.append(':');
sb.append(e.getKey()).append('=').append(String.join(",", e.getValue()));
}
return sb.length() == 0 ? null : sb.toString();
}
}