/**
		 * Returns the identifier of this process's user.
		 * 返回此程序的使用者的識別符號。
		 */
		Log.e(TAG, "Process.myUid() = " + android.os.Process.myTid());

		/**
		 * Returns the identifier of this process, which can be used with
		 * killProcess and sendSignal.
		 * 返回此程序的識別符號，可用於程序和傳送訊號。
		 */
		Log.e(TAG, "Process.myPid() = " + android.os.Process.myPid());

		/**
		 * Returns the identifier of the calling thread, which be used with
		 * setThreadPriority(int, int).
		 * 返回呼叫執行緒的識別符號，該識別符號與StTeRead優先順序（int，int）。
		 */
		Log.e(TAG, "Process.myTid() = " + android.os.Process.myTid());

		/**
		 * Returns the thread's identifier. The ID is a positive long generated
		 * on thread creation, is unique to the thread, and doesn't change
		 * during the lifetime of the thread; the ID may be reused after the
		 * thread has been terminated.
		 * 返回執行緒的識別符號。ID是正長生成的關於執行緒建立，對於執行緒是唯一的，並且不會改變。
		 * 線上程的生存期內，ID可以線上程已被終止。
		 */

		//返回當前執行緒的id
		Log.e(TAG, "Thread.currentThread().getId() = "
				+ Thread.currentThread().getId());
		//返回主執行緒的id
		Log.e(TAG, "getMainLooper().getThread().getId() = "
				+ getMainLooper().getThread().getId());

		//返回當前應用的主執行緒id
		Log.e(TAG,
                        "((getApplication().getMainLooper()).getThread()).getId() = "
                                + ((getApplication().getMainLooper()).getThread())
                                .getId());

		/**
		 * Return the identifier of the task this activity is in. This
		 * identifier will remain the same for the lifetime of the activity.
		 * 返回此活動正在執行的任務的識別符號。這個識別符號對於活動的生存期將保持不變。
		 */
		//返回activity任務棧的id
		Log.e(TAG, "getTaskId() = " + getTaskId());

		/**
		 * The kernel user-ID that has been assigned to this application;
		 * currently this is not a unique ID (multiple applications can have the
		 * same uid).
		 * 已分配給該應用程式的核心使用者ID；這不是一個唯一的ID（多個應用程式可以有相同的UID）。
		 */
		Log.e(TAG, "getApplicationInfo().uid = " + getApplicationInfo().uid);

		/**
		 * The name of the process this application should run in. From the
		 * "process" attribute or, if not set, the same as packageName.
		 * 此應用程式應執行的程序的名稱。從“程序”屬性，或如果沒有設定，與PACKAGEName相同。
		 */
		Log.e(TAG, "getApplicationInfo().processName = "
				+ getApplicationInfo().processName);

		/**
		 * 得到當前activity的資訊
		 */
		Log.e(TAG, "Activity.toString:"+this.toString());
		

		new Thread(new Runnable() {

			@Override
			public void run() {
				//返回當前執行緒的id
				// TODO Auto-generated method stub
				Log.e(TAG, "Thread.currentThread().getId() = "
						+ Thread.currentThread().getId());
			}
		}).start();
 

結果：

2018-08-28 15:00:42.887 29813-29813/com.example.user.demo E/EventBusDemoActivity: Process.myUid() = 29813
2018-08-28 15:00:42.887 29813-29813/com.example.user.demo E/EventBusDemoActivity: Process.myPid() = 29813
2018-08-28 15:00:42.887 29813-29813/com.example.user.demo E/EventBusDemoActivity: Process.myTid() = 29813
2018-08-28 15:00:42.888 29813-29813/com.example.user.demo E/EventBusDemoActivity: Thread.currentThread().getId() = 1
2018-08-28 15:00:42.888 29813-29813/com.example.user.demo E/EventBusDemoActivity: getMainLooper().getThread().getId() = 1
2018-08-28 15:00:42.888 29813-29813/com.example.user.demo E/EventBusDemoActivity: ((getApplication().getMainLooper()).getThread()).getId() = 1
2018-08-28 15:00:42.888 29813-29813/com.example.user.demo E/EventBusDemoActivity: getTaskId() = 113
2018-08-28 15:00:42.888 29813-29813/com.example.user.demo E/EventBusDemoActivity: getApplicationInfo().uid = 10085
2018-08-28 15:00:42.888 29813-29813/com.example.user.demo E/EventBusDemoActivity: getApplicationInfo().processName = com.example.user.demo
2018-08-28 15:00:42.888 29813-29813/com.example.user.demo E/EventBusDemoActivity: Activity.toString:
 
[email protected]
2018-08-28 15:00:42.888 29813-29832/com.example.user.demo E/EventBusDemoActivity: Thread.currentThread().getId() = 885