代碼很簡單說下思路，只需要使用handler通信即可，點擊跳轉源碼頁面鏈接🔗

package cn.xiayiye5.xiayiye5library.thread;import android.os.Handler; import android.os.Looper; import android.os.Message;import androidx.annotation.NonNull;import cn.xiayiye5.xiayiye5library.inter.MainThreadCallBack;/*** @author : xiayiye5* @date : 2021/1/18 10:42* 類描述 : 在任意頁面進行主線程開啟*/ public class MainThread {private MainThreadCallBack mainThreadCallBack;private static final MainThread MAIN_THREAD = new MainThread();private MainThread() {}public static MainThread getInstance() {return MAIN_THREAD;}private final Handler handler = new Handler(Looper.getMainLooper()) {@Overridepublic void handleMessage(@NonNull Message msg) {super.handleMessage(msg);//回調主線程mainThreadCallBack.onFinish();}};/*** 此方法可以在activity fragment 任意頁面進行主線程開啟** @param mainThreadCallBack 回調*/public void open(MainThreadCallBack mainThreadCallBack) {this.mainThreadCallBack = mainThreadCallBack;//發送消息，回調到主線程handler.sendEmptyMessage(0);} }

看下開啟主線程的方法：

MainThread.getInstance().open(new MainThreadCallBack() {@Overridepublic void onFinish() {}});

在看下使用線程池開啟子線程的方法，可點擊查看源碼鏈接🔗

package cn.xiayiye5.xiayiye5library.utils;import java.util.concurrent.BlockingQueue; import java.util.concurrent.Executors; import java.util.concurrent.LinkedBlockingDeque; import java.util.concurrent.RejectedExecutionHandler; import java.util.concurrent.ThreadFactory; import java.util.concurrent.ThreadPoolExecutor; import java.util.concurrent.TimeUnit;/*** @author : xiayiye5* @date : 2021/1/18 10:12* 類描述 : 線程池相關,不建議使用java包裝好的線程池工具類Executors*/ public class ThreadUtils {/*** 線程池相關參數,請點擊查看{@link android.os.AsyncTask}*/private static final int CORE_POOL_SIZE = Runtime.getRuntime().availableProcessors();private static final int MAXI_MUM_POOL_SIZE = CORE_POOL_SIZE * 2 + 1;private static final long KEEP_ALIVE_TIME = 10;private static final TimeUnit UNIT = TimeUnit.HOURS;private static final BlockingQueue<Runnable> WORK_QUEUE = new LinkedBlockingDeque<>(10);private static final ThreadFactory THREAD_FACTORY = Executors.defaultThreadFactory();private static final RejectedExecutionHandler HANDLER = new ThreadPoolExecutor.AbortPolicy();private static final ThreadPoolExecutor THREAD_POOL_EXECUTOR = new ThreadPoolExecutor(CORE_POOL_SIZE, MAXI_MUM_POOL_SIZE, KEEP_ALIVE_TIME, UNIT, WORK_QUEUE, THREAD_FACTORY, HANDLER);private ThreadUtils() {}private static final ThreadUtils THREAD_UTILS = new ThreadUtils();public static ThreadUtils getInstance() {return THREAD_UTILS;}/*** 創建線程池** @param runnable runnable接口*/public void createThread(Runnable runnable) {THREAD_POOL_EXECUTOR.execute(runnable);}/*** 移除線程池** @param runnable runnable接口*/public void removeThread(Runnable runnable) {THREAD_POOL_EXECUTOR.remove(runnable);} }

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