AsyncTask 不能与Thread.sleep()同时使用解决方案

2019-04-15 16:53发布

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public class MainActivity extends Activity { private ImageView iv_ads; String urrstrString = "http://a.hiphotos.baidu.com/image/pic/item/7af40ad162d9f2d3f7ec95eeabec8a136327cc36.jpg"; Bitmap bitmap; ProgressDialog pDialog; private Handler handler = new Handler(); private Runnable runnable = new Runnable() { @Override public void run() { try { Thread.currentThread(); Thread.sleep(10000); startActivity(new Intent(MainActivity.this, NextActivity.class)); } catch (InterruptedException e) { e.printStackTrace(); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); iv_ads = (ImageView) findViewById(R.id.iv_ads); new LoadImage().execute(urrstrString); iv_ads.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { MainActivity.this.startActivity(new Intent(MainActivity.this, AdsActivity.class)); } }); } private class LoadImage extends AsyncTask { @Override protected void onPreExecute() { super.onPreExecute(); pDialog = new ProgressDialog(MainActivity.this); pDialog.setMessage("Loading Image ...."); pDialog.show(); } protected Bitmap doInBackground(String... args) { try { bitmap = BitmapFactory.decodeStream((InputStream) new URL( urrstrString).getContent()); } catch (Exception e) { e.printStackTrace(); } return bitmap; } protected void onPostExecute(Bitmap image) { if (image != null) { iv_ads.setImageBitmap(image); pDialog.dismiss(); handler.postDelayed(runnable, 4000); } else { pDialog.dismiss(); Toast.makeText(MainActivity.this, "Image Does Not exist or Network Error", Toast.LENGTH_SHORT).show(); } } } } 　　异步线程与直接在oncreate() 中Thread.sleep()达不到预期的停留几秒的效果，可以用Handler发送消息，来实现效果...............

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