定義一個包含主線程looper的線程池

public class MainExecutor extends AbstractExecutorService {

    private final Handler mHandler;

    public MainExecutor(Looper looper) {
        mHandler = new Handler(looper);
    }

    public Handler getHandler() {
        return mHandler;
    }

    @Override
    public void execute(Runnable runnable) {
        if (getHandler().getLooper() == Looper.myLooper()) {
            runnable.run();
        } else {
            getHandler().post(runnable);
        }
    }

    /**
     * Same as execute, but never runs the action inline.
     */
    public void post(Runnable runnable) {
        getHandler().post(runnable);
    }
    ...
    }

在工具類中將他定義為findl

public class Executors {
    /**
     * Returns the executor for running tasks on the main thread.
     */
    public static final MainExecutor MAIN_EXECUTOR =
            new MainExecutor(Looper.getMainLooper());
}

使用方法

MAIN_EXECUTOR.execute(new Runnable() {
    @Override
    public void run() {
        //執(zhí)行代碼
    }
});