- 现在大型的app都采用多个进程来分担单个进程的压力,在清单文件中配置android:process属性,确定是否在同一个进程中,如图中有2个不同的进程:
- 进程名以“：”开头的进程属于当前应用的私有进程，其他应用的组件不可以和它跑在同一个进程当中
不以“：”开头的进程属于全局进程，其他应用通过shareUID方式可以和它跑在同一个进程中 -
Android会为每个应用分配唯一的一个UID，具有相同UID的应用才能共享数据
image.png
获取应用UID的方法:(注意包名的替换)
fun getUid(context: Context): String? {
var uid = ""
try {
val pm: PackageManager = context.getPackageManager()
val ai = pm.getApplicationInfo("com.app.framworkdemo", PackageManager.GET_META_DATA)
uid = ai.uid.toString()
} catch (e: PackageManager.NameNotFoundException) {
e.printStackTrace()
}
return uid
}
- 验证: 首先创建application:
class ProcessApplication:Application() {
private val TAG="m_tag"
override fun onCreate() {
super.onCreate()
//获取进程Id
//获取进程Id
val pid = Process.myPid()
Log.d(TAG, "ProcessApplication onCreate pid is $pid") //根据进程id获取进程名称
val pName = getProcessName(this, pid)
Log.d(TAG, "onCreate:${pName} ")
}
fun getProcessName(cxt: Context, pid: Int): String? {
val am = cxt.getSystemService(Context.ACTIVITY_SERVICE) as ActivityManager
val runningApps = am.runningAppProcesses ?: return null
for (procInfo in runningApps) {
if (procInfo.pid == pid) {
return procInfo.processName
}
}
return null
}
}
- 验证: 其次创建不同进程的activity:
第一个activity的进程,android:process=":remote"
Log.d(TAG, "onCreate: ProcessOneActivity")
val pid = Process.myPid()
Log.d(TAG, "onCreate:ProcessOneActivity pid: $pid")
Log.d(TAG, "onCreate:ProcessOneActivity getUid: ${getUid(this)}")
binding.btnProcessOne.setOnClickListener {
val intent=Intent(this,ProcessTwoActivity::class.java)
intent.putExtra("process","进程测试")
startActivity(intent)
}
第二个activity的进程,android:process="com.process.two"
val process=intent.getStringExtra("process")
Log.d(TAG, "onCreate:ProcessTwoActivity $process")
val pid = Process.myPid()
Log.d(TAG, "onCreate: ProcessTwoActivity pid:$pid")
Log.d(TAG, "onCreate:ProcessTwoActivity getUid:${getUid(this)}")
测试结果:
截屏2023-03-20 15.42.37.png
