Activity.onCreate 中的 AsyncTask.get() 导致加载时间过长，有时会崩溃

本文介绍了Activity.onCreate 中的 AsyncTask.get() 导致加载时间过长，有时会崩溃的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

限时送ChatGPT账号..

当我开始此活动时，加载时间过长，有时我的应用程序崩溃.我想知道是否有什么我可以做的事情，直到主要活动在前一个活动中完全加载或类似的东西，活动才会开始，这样我的活动就会加载而不会出现问题或崩溃.

When I start this activity, it takes too much time to load and sometimes my app crashes. I want to know if there is anything I can do so the activity will no start until the main activity is fully loaded in the previous activity or something like this so my activity will load without problems or crushes.

广告活动.java

import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;
import androidx.vectordrawable.graphics.drawable.Animatable2Compat;

import android.app.ProgressDialog;
import android.content.Intent;
import android.graphics.drawable.Drawable;
import android.media.MediaPlayer;
import android.Uri;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.CountDownTimer;
import android.os.Handler;
import android.view.View;
import android.widget.ImageButton;
import android.widget.ImageView;
import android.widget.ProgressBar;
import android.widget.TextView;
import android.widget.Toast;

import com.bumptech.glide.Glide;
import com.bumptech.glide.load.DataSource;
import com.bumptech.glide.load.engine.GlideException;
import com.bumptech.glide.load.resource.gif.GifDrawable;
import com.bumptech.glide.request.RequestListener;
import com.bumptech.glide.request.target.Target;

import java.util.concurrent.ExecutionException;

public class AdvertisingActivity extends AppCompatActivity {
    ImageView imageView;
    ImageView imageButton;
    String ImageClick = "";
    String ImageLink = "";
    private TextView Countdowner;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.advertising);
        getSupportActionBar().hide();
        imageView = findViewById(R.id.Advertisings);
        imageButton = findViewById(R.id.closebuttons);
        imageButton.setVisibility(View.GONE);
        Countdowner = findViewById(R.id.Countdowns);
        final ParseJson parsejson = new ParseJson();
        try {
            parsejson.execute().get();

        } catch (InterruptedException e) {
            e.printStackTrace();
        } catch (ExecutionException e) {
            e.printStackTrace();
        }
        ImageLink = parsejson.getHouseAdsImage();
        ImageClick = parsejson.getHouseAdsClick();
        boolean ifGif = parsejson.getGIF();


        imageButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                finish();
            }
        });

        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent browserIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(parsejson.getHouseAdsClick()));
                AdvertisingActivity.this.startActivity(browserIntent);
            }
        });


        if (ifGif == true) {
            Glide.with(this).asGif().load(parsejson.getHouseAdsImage()).listener(new RequestListener<GifDrawable>() {
                @Override
                public boolean onLoadFailed(@Nullable @org.jetbrains.annotations.Nullable GlideException e, Object model, Target<GifDrawable> target, boolean isFirstResource) {
                    finish();
                    Toast.makeText(AdvertisingActivity.this, "Failed to load", Toast.LENGTH_SHORT).show();
                    return false;
                }

                @Override
                public boolean onResourceReady(GifDrawable resource, Object model, Target<GifDrawable> target, DataSource dataSource, boolean isFirstResource) {
                    resource.setLoopCount(1);
                    resource.registerAnimationCallback(new Animatable2Compat.AnimationCallback() {
                        @Override
                        public void onAnimationEnd(Drawable drawable) {
                            Glide.with(AdvertisingActivity.this).load(parsejson.getAfterGif()).into(imageView);
                            Toast.makeText(AdvertisingActivity.this, "GIF stopped", Toast.LENGTH_SHORT).show();
                        }
                    });
                    new CountDownTimer(13000, 1000) {

                        public void onTick(long millisUntilFinished) {
                            Countdowner.setText("You can close ad after: " + millisUntilFinished / 1000);
                        }

                        public void onFinish() {
                            imageButton.setVisibility(View.VISIBLE);
                            Countdowner.setVisibility(View.GONE);
                        }
                    }.start();
                    Toast.makeText(AdvertisingActivity.this, "Success to load", Toast.LENGTH_SHORT).show();

                    return false;
                }
            }).into(imageView);

        } else {
            Glide.with(AdvertisingActivity.this).load(parsejson.getAfterGif()).into(imageView);

        }
    }
}

推荐答案

你的问题是你在主线程上同步等待 AsyncTask 完成:

Your problem is that you're waiting synchronously on the main thread for your AsyncTask to finish:

parsejson.execute().get();

你基本上不应该在主线程上调用 AsyncTask.get():它会阻塞线程直到它完成，这违背了 AsyncTask 的要点，不 阻塞主线程.

You should basically never be calling AsyncTask.get() on the main thread: it will block the thread until it finishes, which defeats the point of an AsyncTask, which is to not block the main thread.

相反，您应该在 AsyncTask.onPostExecute.

Instead, you should do whatever you're waiting for in AsyncTask.onPostExecute.

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