简述

创建AOSP源码可编译一个简单apk的过程，代码子目录结构图如下所示

文件的添加

1.com.custom.test目录下创建TestActivity.java文件
用于简单的界面显示类

package com.custom.test;

import android.app.Activity;
import android.os.Bundle;

import androidx.annotation.Nullable;

import com.custom.test.R;

public class TestActivity extends Activity {
    private static final String TAG = "TestActivity";
    
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_test);

    }
} 

2.布局文件activity_test.xml
显示出来的布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="16dp">

    <Button
        android:id="@+id/btn_test"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="test"
        android:textAllCaps="false" />

</LinearLayout>

3.values下的资源文件
strings.xml

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
    <string name="app_name">custom_test</string>
</resources>

styles.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.custom.test">

    <application
        android:allowBackup="false"
        android:label="@string/app_name"
        android:usesCleartextTraffic="false">
        <activity
            android:name=".TestActivity"
            android:excludeFromRecents="true"
            android:theme="@style/Transparent">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>
</manifest>

5.Android.bp文件

android_app {
    name: "custom_test",
    static_libs: [
        "androidx.annotation_annotation",
    ],
    srcs: [
        "src/**/*.java"
    ],
    platform_apis: true,
    certificate: "platform",
}

通过编译可输出一个custom_test.apk的文件