Android中获取进程名的方式
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2022-11-01 15:56:30
获取进程名一般一个App中有多个进程时,每个进程都有自己独立的Application,所以定义的Application中的onCreate方法会被重复调用,为了防止onCreate中的方法多次初始化,需要根据进程名判断是否针对当前进程进行初始化,获取进程名的方法如下:常规方法,通过ActivityManager获得 public static String getCurrentProcessNameByActivityManager(@NonNull Context context) {...
获取进程名
一般一个App中有多个进程时,每个进程都有自己独立的Application,所以定义的Application中的onCreate方法会被重复调用,为了防止onCreate中的方法多次初始化,需要根据进程名判断是否针对当前进程进行初始化,获取进程名的方法如下:
-
常规方法,通过ActivityManager获得
public static String getCurrentProcessNameByActivityManager(@NonNull Context context) { int pid = android.os.Process.myPid(); ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE); if (am != null) { List<ActivityManager.RunningAppProcessInfo> runningAppList = am.getRunningAppProcesses(); if (runningAppList != null) { for (ActivityManager.RunningAppProcessInfo processInfo : runningAppList) { if (processInfo.pid == pid) { return processInfo.processName; } } } } return null; }
通过ActivityManager获取当前进程名称缺点:
-
getRunningAppProcesses()方法需要跨进程通信,造成耗时
-
拿到RunningAppProcessInfo后,需要遍历找到与当前进程的信息,也会增加耗时、
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getRunningAppProcesses()可能调用失败,返回null,也可能AIDL调用失败,概率很低
-
-
在Android 9 API28,中新增了一个方法:Application.getPrecessName()
Application.getPrecessName()
最后总结获取进程名称工具类
import android.app.ActivityManager;
import android.app.Application;
import android.content.Context;
import android.os.Build;
import android.os.Process;
import android.text.TextUtils;
import androidx.annotation.NonNull;
import androidx.annotation.Nullable;
import java.lang.reflect.Method;
import java.util.List;
public class ProcessUtil {
private static String currentProcessName;
/**
* @return 当前进程名
*/
@Nullable
public static String getCurrentProcessName(@NonNull Context context) {
if (!TextUtils.isEmpty(currentProcessName)) {
return currentProcessName;
}
//1)通过Application的API获取当前进程名
currentProcessName = getCurrentProcessNameByApplication();
if (!TextUtils.isEmpty(currentProcessName)) {
return currentProcessName;
}
//2)通过反射ActivityThread获取当前进程名
currentProcessName = getCurrentProcessNameByActivityThread();
if (!TextUtils.isEmpty(currentProcessName)) {
return currentProcessName;
}
//3)通过ActivityManager获取当前进程名
currentProcessName = getCurrentProcessNameByActivityManager(context);
return currentProcessName;
}
/**
* 通过Application新的API获取进程名,无需反射,无需IPC,效率最高。
*/
public static String getCurrentProcessNameByApplication() {
if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.P) {
return Application.getProcessName();
}
return null;
}
/**
* 通过反射ActivityThread获取进程名,避免了ipc
*/
public static String getCurrentProcessNameByActivityThread() {
String processName = null;
try {
final Method declaredMethod = Class.forName("android.app.ActivityThread", false, Application.class.getClassLoader())
.getDeclaredMethod("currentProcessName", (Class<?>[]) new Class[0]);
declaredMethod.setAccessible(true);
final Object invoke = declaredMethod.invoke(null, new Object[0]);
if (invoke instanceof String) {
processName = (String) invoke;
}
} catch (Throwable e) {
e.printStackTrace();
}
return processName;
}
/**
* 通过ActivityManager 获取进程名,需要IPC通信
*/
public static String getCurrentProcessNameByActivityManager(@NonNull Context context) {
if (context == null) {
return null;
}
int pid = Process.myPid();
ActivityManager am = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
if (am != null) {
List<ActivityManager.RunningAppProcessInfo> runningAppList = am.getRunningAppProcesses();
if (runningAppList != null) {
for (ActivityManager.RunningAppProcessInfo processInfo : runningAppList) {
if (processInfo.pid == pid) {
return processInfo.processName;
}
}
}
}
return null;
}
}
获取app包名称
PackageManager manager = context.getPackageManager();
PackageInfo info = manager.getPackageInfo(context.getPackageName(), 0);
info.packageName;
参考
https://juejin.cn/post/6877127949452050446
本文地址:https://blog.csdn.net/yxf0448/article/details/112506622