01-Android_Common_System_Customization

Android Environment Setup

cd android
source build/envsetup.sh
lunch ceres_c3-userdebug

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Developer Mode

Steps to Enable: Settings -> About tablet -> Tap "Build number" 7 times -> "Developer mode activated"

Developer Options Path: Settings -> System -> Developer options

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APP/File Compilation Not Taking Effect

Due to Android's lazy compilation, directly replacing files may not trigger rebuilds. Solutions:

1. make installclean

2. rm out/target/product/apollo-p2/xxx/xxx

3. Modify compilation conditions (e.g., filename or APK name changes).

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Screen Rotation via ADB

Use these commands to rotate the screen:

# 0° (Default)
adb shell settings put system user_rotation 0

# 90°
adb shell settings put system user_rotation 1

# 180°
adb shell settings put system user_rotation 2

# 270°
adb shell settings put system user_rotation 3

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Boot Logo Replacement

Path:

longan/device/config/chips/a133/configs/c3/android/bootlogo.bmp

Requirements:

• Format: 32-bit BMP

• Resolution: Lower than the screen's native resolution

---

Boot Animation Customization

Default Replacement

Supported formats: bootanimation.mp4 (higher priority) or bootanimation.zip.

Default Animation Path:

android/device/softwinner/ceres-c3/media/bootanimation.zip

Copy Path Configuration: Modify android/device/softwinner/ceres-c3/ceres_c3.mk:

# For ZIP
PRODUCT_COPY_FILES += $(LOCAL_PATH)/media/bootanimation.zip:system/media/bootanimation.zip

# For MP4
PRODUCT_COPY_FILES += $(LOCAL_PATH)/media/bootanimation.mp4:system/media/bootanimation.mp4

Note: MP4 animations will show the default Android logo on first boot. Reboot to apply changes.

Live Replacement

adb root
adb remount
adb push $(bootanimation_path) /system/media/bootanimation.zip
adb reboot

Creating bootanimation.zip

File Structure:

part0/0000.png
part0/0001.png
...
part1/0013.png
...
desc.txt
audio_conf.txt  # Optional for sound

desc.txt Configuration:

800 480 15   # Width, Height, FPS
p 1 0 part0  # Play part0 once
p 0 0 part1  # Loop part1 until boot completes

Compression Instructions:

• Windows: Use "Store" compression level.

• Linux: zip -0qry bootanimation.zip *.txt part0/ part1/

---

Boot Sound

Add Audio.wav to the part0 directory and include audio_conf.txt in the root.

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Launcher Customization

Source Path:

android/packages/apps/Launcher3/

Compile Launcher APK:

cd android/
. build/envsetup.sh
lunch ceres_c3-userdebug
BUILD_NUMBER=ido-a133 m Launcher3QuickStepGo -j32

Disable Search Bar:

--- a/android/packages/apps/Launcher3/src/com/android/launcher3/config/BaseFlags.java
+++ b/android/packages/apps/Launcher3/src/com/android/launcher3/config/BaseFlags.java
@@ -68,7 +68,7 @@ abstract class BaseFlags {
     public static final boolean LAUNCHER3_PROMISE_APPS_IN_ALL_APPS = false;
 
     // Enable moving the QSB on the 0th screen of the workspace
-    public static final boolean QSB_ON_FIRST_SCREEN = true;
+    public static final boolean QSB_ON_FIRST_SCREEN = false;

---

Default Language Settings

Set via persist.sys.locale: Modify device/softwinner/apollo/apollo_p2.mk:

PRODUCT_PROPERTY_OVERRIDES += persist.sys.locale=zh-CN

Override Country/Language:

--- a/device/softwinner/apollo/apollo_p2.mk
+++ b/device/softwinner/apollo/apollo_p2.mk
@@ -32,8 +32,8 @@ PRODUCT_PACKAGES += FT618
 
 PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
     persist.sys.timezone=Asia/Shanghai \
-    persist.sys.country=US \
-    persist.sys.language=en
+    persist.sys.country=CN \
+    persist.sys.language=zh

Locale Priority: Defined in frameworks/base/core/jni/AndroidRuntime.cpp.

---

Integrating Third-Party Apps

Example for test.apk:

Android.mk:

LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE_CLASS := APPS
LOCAL_MODULE_SUFFIX := $(COMMON_ANDROID_PACKAGE_SUFFIX)
LOCAL_CERTIFICATE := PRESIGNED
LOCAL_MODULE := test
LOCAL_SRC_FILES := $(LOCAL_MODULE).apk
include $(BUILD_PREBUILT)

Android.bp:

android_app_import {
    name: "test",
    apk: "test.apk",
    certificate: "platform",
    dex_preopt: { enabled: true },
    enforce_uses_libs: false,
}

Add to Build:

PRODUCT_PACKAGES += test

---

Auto-Start Apps on Boot

Method 1: Set as Launcher

Add to AndroidManifest.xml:

<activity android:name=".MainActivity">
    <intent-filter>
        <category android:name="android.intent.category.HOME"/>
        <category android:name="android.intent.category.DEFAULT"/>
    </intent-filter>
</activity>

Method 2: Boot Broadcast Receiver

AndroidManifest.xml:

<uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED" />
<application>
    <receiver
        android:name=".MyReceiver"
        android:enabled="true"
        android:exported="true">
        <intent-filter android:priority="1000">
            <action android:name="android.intent.action.BOOT_COMPLETED"/>
        </intent-filter>
    </receiver>
</application>

Receiver Code:

public class MyReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        if (intent.getAction().equals("android.intent.action.BOOT_COMPLETED")) {
            Intent i = new Intent(context, MainActivity.class);
            i.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
            context.startActivity(i);
        }
    }
}

Preinstall to /system/priv-app/:

adb root
adb remount
adb push ./app /system/priv-app/

---

ADB Screen Cast

Tool Path: 5-DevelopmentTools/ADB Screen Cast

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DPI Configuration

Modify Default DPI:

--- a/android/device/softwinner/ceres-c3/ceres_c3.mk
+++ b/android/device/softwinner/ceres-c3/ceres_c3.mk
@@ -256,7 +256,7 @@ PRODUCT_SYSTEM_DEFAULT_PROPERTIES += \
 endif
 
 PRODUCT_PROPERTY_OVERRIDES += \
-    ro.sf.lcd_density=160
+    ro.sf.lcd_density=120

Command Line:

wm density 120

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FAQ

1. Headphones Always Detected

The driver defaults to headphone mode for speaker functionality. To revert: