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

Question

当我开始这个活动时，加载时间太长，有时我的应用程序会崩溃。我想知道我是否可以做任何事情，以便在主要活动在前一个活动中完全加载或类似的事情之前，活动不会开始，因此我的活动将加载而不会出现问题或崩溃。

AdvertisingActivity.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.net.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);

        }
    }
}

Answer 1

您的问题是您正在主线程上同步等待 AsyncTask 完成：

parsejson.execute().get();

您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，即不阻塞主线程。

相反，您应该在AsyncTask.onPostExecute 中等待您做的任何事情。