一个典型AsyncTask的。
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public class DialogTestActivity extends Activity |
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private Button |
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private Task |
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@Override |
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public void onCreate(Bundle |
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super.onCreate(savedInstanceState); |
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setContentView(R.layout.main); |
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this.button1 |
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button1.setOnClickListener(new View.OnClickListener() |
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@Override |
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public void onClick(View |
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if (tasknull && |
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Toast.makeText(DialogTestActivity.this, "task, |
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//task.cancel(true); |
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} else { |
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tasknew Task(); |
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task.execute(); |
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} |
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} |
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}); |
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} |
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@Override |
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protected void onDestroy() |
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super.onDestroy(); |
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// |
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task.cancel(true); |
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} |
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private class Task extends AsyncTask<Void, |
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|
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@Override |
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protected void onPreExecute() |
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super.onPreExecute(); |
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Toast.makeText(DialogTestActivity.this, "task, |
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} |
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|
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@Override |
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protected Void |
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try { |
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// |
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Thread.sleep(5000); |
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} catch (InterruptedException |
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e.printStackTrace(); |
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} |
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// |
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if (!isCancelled()) |
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System.out.println("task); |
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} |
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return null; |
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} |
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@Override |
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protected void onPostExecute(Void |
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super.onPostExecute(result); |
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Toast.makeText(DialogTestActivity.this, "task, |
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// |
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// |
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if (!isFinishing()) |
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try { |
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createAlertDialog().show(); |
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} catch (Exception |
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} |
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} |
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} |
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@Override |
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protected void onCancelled() |
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super.onCancelled(); |
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System.out.println("task); |
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} |
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} |
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private AlertDialog |
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return new AlertDialog.Builder(DialogTestActivity.this).setTitle("fadfasdf") |
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.setPositiveButton("OK", new DialogInterface.OnClickListener() |
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public void onClick(DialogInterfaceint whichButton) |
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} |
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}).setNegativeButton("Cancel", new DialogInterface.OnClickListener() |
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public void onClick(DialogInterfaceint whichButton) |
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} |
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}).create(); |
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} |
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} |