如何从任何地方获取包名？

一个想法是在您的主要活动中有一个静态变量，实例化为包名称。然后只需引用该变量。

您必须在主 Activity 的 onCreate() 方法中对其进行初始化：

全局类：

public static String PACKAGE_NAME;

然后..

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);

    PACKAGE_NAME = getApplicationContext().getPackageName();
}

然后您可以通过 Main.PACKAGE_NAME 访问它。

如果您使用 gradle-android-plugin 来构建您的应用程序，那么您可以使用

BuildConfig.APPLICATION_ID

从任何范围检索包名称，包括。一个静态的。

如果使用“任何地方”这个词，您的意思是没有明确的 Context（例如来自后台线程），您应该在项目中定义一个类，例如：

public class MyApp extends Application {
    private static MyApp instance;

    public static MyApp getInstance() {
        return instance;
    }

    public static Context getContext(){
        return instance;
        // or return instance.getApplicationContext();
    }

    @Override
    public void onCreate() {
        instance = this;
        super.onCreate();
    }
}

然后在您的 manifest 中，您需要将此类添加到 Application 标签的 Name 字段中。或者编辑xml并放

<application
    android:name="com.example.app.MyApp"
    android:icon="@drawable/icon"
    android:label="@string/app_name"
    .......
    <activity
        ......

然后从任何你可以打电话的地方

String packagename= MyApp.getContext().getPackageName();

希望能帮助到你。

如果您使用 gradle build，请使用：BuildConfig.APPLICATION_ID 获取应用程序的包名称。

对于那些使用 Gradle 的人，正如@Billda 所提到的，您可以通过以下方式获取包名称：

BuildConfig.APPLICATION_ID

这为您提供了在您的应用程序 gradle 中声明的包名称：

android {
    defaultConfig {
        applicationId "com.domain.www"
    }
}

如果您有兴趣获取您的 java 类使用的包名（有时与 applicationId 不同），您可以使用

BuildConfig.class.getPackage().toString()

如果您对使用哪一个感到困惑，read here：

注意：应用程序 ID 过去直接与代码的包名称相关联；因此一些 Android API 在其方法名称和参数名称中使用术语“包名称”，但这实际上是您的应用程序 ID。例如，Context.getPackageName() 方法返回您的应用程序 ID。无需在您的应用程序代码之外共享您的代码的真实包名称。

private String getApplicationName(Context context, String data, int flag) {

   final PackageManager pckManager = context.getPackageManager();
   ApplicationInfo applicationInformation;
   try {
       applicationInformation = pckManager.getApplicationInfo(data, flag);
   } catch (PackageManager.NameNotFoundException e) {
       applicationInformation = null;
   }
   final String applicationName = (String) (applicationInformation != null ? pckManager.getApplicationLabel(applicationInformation) : "(unknown)");
   return applicationName;

}

你可以像这样得到你的包名：

$ /path/to/adb shell 'pm list packages -f myapp'
package:/data/app/mycompany.myapp-2.apk=mycompany.myapp

以下是选项：

$ adb
Android Debug Bridge version 1.0.32
Revision 09a0d98bebce-android

 -a                            - directs adb to listen on all interfaces for a connection
 -d                            - directs command to the only connected USB device
                                 returns an error if more than one USB device is present.
 -e                            - directs command to the only running emulator.
                                 returns an error if more than one emulator is running.
 -s <specific device>          - directs command to the device or emulator with the given
                                 serial number or qualifier. Overrides ANDROID_SERIAL
                                 environment variable.
 -p <product name or path>     - simple product name like 'sooner', or
                                 a relative/absolute path to a product
                                 out directory like 'out/target/product/sooner'.
                                 If -p is not specified, the ANDROID_PRODUCT_OUT
                                 environment variable is used, which must
                                 be an absolute path.
 -H                            - Name of adb server host (default: localhost)
 -P                            - Port of adb server (default: 5037)
 devices [-l]                  - list all connected devices
                                 ('-l' will also list device qualifiers)
 connect <host>[:<port>]       - connect to a device via TCP/IP
                                 Port 5555 is used by default if no port number is specified.
 disconnect [<host>[:<port>]]  - disconnect from a TCP/IP device.
                                 Port 5555 is used by default if no port number is specified.
                                 Using this command with no additional arguments
                                 will disconnect from all connected TCP/IP devices.

device commands:
  adb push [-p] <local> <remote>
                               - copy file/dir to device
                                 ('-p' to display the transfer progress)
  adb pull [-p] [-a] <remote> [<local>]
                               - copy file/dir from device
                                 ('-p' to display the transfer progress)
                                 ('-a' means copy timestamp and mode)
  adb sync [ <directory> ]     - copy host->device only if changed
                                 (-l means list but don't copy)
  adb shell                    - run remote shell interactively
  adb shell <command>          - run remote shell command
  adb emu <command>            - run emulator console command
  adb logcat [ <filter-spec> ] - View device log
  adb forward --list           - list all forward socket connections.
                                 the format is a list of lines with the following format:
                                    <serial> " " <local> " " <remote> "\n"
  adb forward <local> <remote> - forward socket connections
                                 forward specs are one of:
                                   tcp:<port>
                                   localabstract:<unix domain socket name>
                                   localreserved:<unix domain socket name>
                                   localfilesystem:<unix domain socket name>
                                   dev:<character device name>
                                   jdwp:<process pid> (remote only)
  adb forward --no-rebind <local> <remote>
                               - same as 'adb forward <local> <remote>' but fails
                                 if <local> is already forwarded
  adb forward --remove <local> - remove a specific forward socket connection
  adb forward --remove-all     - remove all forward socket connections
  adb reverse --list           - list all reverse socket connections from device
  adb reverse <remote> <local> - reverse socket connections
                                 reverse specs are one of:
                                   tcp:<port>
                                   localabstract:<unix domain socket name>
                                   localreserved:<unix domain socket name>
                                   localfilesystem:<unix domain socket name>
  adb reverse --norebind <remote> <local>
                               - same as 'adb reverse <remote> <local>' but fails
                                 if <remote> is already reversed.
  adb reverse --remove <remote>
                               - remove a specific reversed socket connection
  adb reverse --remove-all     - remove all reversed socket connections from device
  adb jdwp                     - list PIDs of processes hosting a JDWP transport
  adb install [-lrtsdg] <file>
                               - push this package file to the device and install it
                                 (-l: forward lock application)
                                 (-r: replace existing application)
                                 (-t: allow test packages)
                                 (-s: install application on sdcard)
                                 (-d: allow version code downgrade)
                                 (-g: grant all runtime permissions)
  adb install-multiple [-lrtsdpg] <file...>
                               - push this package file to the device and install it
                                 (-l: forward lock application)
                                 (-r: replace existing application)
                                 (-t: allow test packages)
                                 (-s: install application on sdcard)
                                 (-d: allow version code downgrade)
                                 (-p: partial application install)
                                 (-g: grant all runtime permissions)
  adb uninstall [-k] <package> - remove this app package from the device
                                 ('-k' means keep the data and cache directories)
  adb bugreport                - return all information from the device
                                 that should be included in a bug report.

  adb backup [-f <file>] [-apk|-noapk] [-obb|-noobb] [-shared|-noshared] [-all] [-system|-nosystem] [<packages...>]
                               - write an archive of the device's data to <file>.
                                 If no -f option is supplied then the data is written
                                 to "backup.ab" in the current directory.
                                 (-apk|-noapk enable/disable backup of the .apks themselves
                                    in the archive; the default is noapk.)
                                 (-obb|-noobb enable/disable backup of any installed apk expansion
                                    (aka .obb) files associated with each application; the default
                                    is noobb.)
                                 (-shared|-noshared enable/disable backup of the device's
                                    shared storage / SD card contents; the default is noshared.)
                                 (-all means to back up all installed applications)
                                 (-system|-nosystem toggles whether -all automatically includes
                                    system applications; the default is to include system apps)
                                 (<packages...> is the list of applications to be backed up.  If
                                    the -all or -shared flags are passed, then the package
                                    list is optional.  Applications explicitly given on the
                                    command line will be included even if -nosystem would
                                    ordinarily cause them to be omitted.)

  adb restore <file>           - restore device contents from the <file> backup archive

  adb disable-verity           - disable dm-verity checking on USERDEBUG builds
  adb enable-verity            - re-enable dm-verity checking on USERDEBUG builds
  adb keygen <file>            - generate adb public/private key. The private key is stored in <file>,
                                 and the public key is stored in <file>.pub. Any existing files
                                 are overwritten.
  adb help                     - show this help message
  adb version                  - show version num

scripting:
  adb wait-for-device          - block until device is online
  adb start-server             - ensure that there is a server running
  adb kill-server              - kill the server if it is running
  adb get-state                - prints: offline | bootloader | device
  adb get-serialno             - prints: <serial-number>
  adb get-devpath              - prints: <device-path>
  adb remount                  - remounts the /system, /vendor (if present) and /oem (if present) partitions on the device read-write
  adb reboot [bootloader|recovery]
                               - reboots the device, optionally into the bootloader or recovery program.
  adb reboot sideload          - reboots the device into the sideload mode in recovery program (adb root required).
  adb reboot sideload-auto-reboot
                               - reboots into the sideload mode, then reboots automatically after the sideload regardless of the result.
  adb sideload <file>          - sideloads the given package
  adb root                     - restarts the adbd daemon with root permissions
  adb unroot                   - restarts the adbd daemon without root permissions
  adb usb                      - restarts the adbd daemon listening on USB
  adb tcpip <port>             - restarts the adbd daemon listening on TCP on the specified port

networking:
  adb ppp <tty> [parameters]   - Run PPP over USB.
 Note: you should not automatically start a PPP connection.
 <tty> refers to the tty for PPP stream. Eg. dev:/dev/omap_csmi_tty1
 [parameters] - Eg. defaultroute debug dump local notty usepeerdns

adb sync notes: adb sync [ <directory> ]
  <localdir> can be interpreted in several ways:

  - If <directory> is not specified, /system, /vendor (if present), /oem (if present) and /data partitions will be updated.

  - If it is "system", "vendor", "oem" or "data", only the corresponding partition
    is updated.

environment variables:
  ADB_TRACE                    - Print debug information. A comma separated list of the following values
                                 1 or all, adb, sockets, packets, rwx, usb, sync, sysdeps, transport, jdwp
  ANDROID_SERIAL               - The serial number to connect to. -s takes priority over this if given.
  ANDROID_LOG_TAGS             - When used with the logcat option, only these debug tags are printed.

您可以使用 undocumented 方法 android.app.ActivityThread.currentPackageName() ：

Class<?> clazz = Class.forName("android.app.ActivityThread");
Method method  = clazz.getDeclaredMethod("currentPackageName", null);
String appPackageName = (String) method.invoke(clazz, null);

警告：这必须在应用程序的主线程上完成。

感谢这篇博文的想法：http://blog.javia.org/static-the-android-application-package/。

只需使用此代码

val packageName = context.packageName 

PackageInfo pinfo = this.getPackageManager().getPackageInfo(getPackageName(), 0);
         String sVersionCode = pinfo.versionCode; // 1
         String sVersionName = pinfo.versionName; // 1.0
         String sPackName = getPackageName(); // cz.okhelp.my_app
         int nSdkVersion = Integer.parseInt(Build.VERSION.SDK); 
         int nSdkVers = Build.VERSION.SDK_INT; 

希望它会奏效。

使用：BuildConfig.APPLICATION_ID 在任何地方获取 PACKAGE NAME（即；服务、接收器、活动、片段等）

示例：字符串 PackageName = BuildConfig.APPLICATION_ID；

创建一个 java 模块，以便在启动您的应用程序时初始运行。该模块将扩展 android Application 类，并将初始化任何全局应用程序变量，还包含应用程序范围的实用程序 -

public class MyApplicationName extends Application {

    private final String PACKAGE_NAME = "com.mysite.myAppPackageName";

    public String getPackageName() { return PACKAGE_NAME; }
}

当然，这可能包括从android系统获取包名的逻辑；但是，上面的代码比从 android 获取的代码更小、更快、更清晰。

确保在您的 AndroidManifest.xml 文件中放置一个条目，以告诉 android 在运行任何活动之前运行您的应用程序模块 -

<application 
    android:name=".MyApplicationName" 
    ...
>

然后，要从任何其他模块获取包名称，请输入

MyApp myApp = (MyApp) getApplicationContext();
String myPackage = myApp.getPackageName();

使用应用程序模块还可以为需要但没有上下文的模块提供上下文。

只需导入Android.app，即可使用：<br/>Application.getProcessName()<br/>

获取没有上下文、视图或活动的当前应用程序进程名称。

BuildConfig.APPLICATION_ID 和包可能并不总是相同的。使用“buildConfigField”让 gradle 将包添加到 BuildConfig 并作为 BuildConfig.PACKAGE 访问。 https://developer.android.com/studio/build/gradle-tips

defaultConfig {
    applicationId "com.example.app.name"
    minSdkVersion 24
    targetSdkVersion 29
    versionCode 1
    versionName '0.1.0'
    testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
    buildConfigField("String", "PACKAGE", "\"com.example.app\"")
}

这在科特林对我有用

       override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
       
        var packageName=applicationContext.packageName // need to put this line
        Log.d("YourTag",packageName)
}