AsyncTaskTest(API Level under 13 ,over 13)

AndroidManifest.xml

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="test.asynctask"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk android:minSdkVersion="12" />

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".MainActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
    </application>

</manifest>

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="execute" />

    <Button
        android:id="@+id/button2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="executeOnExecutor" />

</LinearLayout>

MainActivity.java

package test.asynctask;

import java.util.concurrent.BlockingQueue;
import java.util.concurrent.Executor;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;

import android.app.Activity;
import android.os.AsyncTask;
import android.os.Bundle;
import android.util.Log;
import android.view.View;

public class MainActivity extends Activity {

    private static final String LOG_TAG = "AsyncTaskTest";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        findViewById(R.id.button1).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                testAsyncTaskExecute();
            }
        });
        findViewById(R.id.button2).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                testAsyncTaskExecuteOnExecutor();
            }
        });
    }

    private void testAsyncTaskExecute() {
        AsyncTask<Void, Void, Void> task1 = new TestAsyncTask();
        AsyncTask<Void, Void, Void> task2 = new TestAsyncTask();
        task1.execute();
        task2.execute();
    }

    private void testAsyncTaskExecuteOnExecutor() {
        AsyncTask<Void, Void, Void> task1 = new TestAsyncTask();
        AsyncTask<Void, Void, Void> task2 = new TestAsyncTask();

        task1.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
        task2.executeOnExecutor(AsyncTask.THREAD_POOL_EXECUTOR);
    }

    private static class TestAsyncTask extends AsyncTask<Void, Void, Void> {
        @Override
        protected Void doInBackground(Void... params) {
            long tId = Thread.currentThread().getId();
            Log.d(LOG_TAG, "[doInBackground]start " + tId);
            try {
                Thread.sleep(2000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
            Log.d(LOG_TAG, "[doInBackground]end   " + tId);
            return null;
        }
    }
}

long tId = Thread.currentThread().getId(); is exactly what I was looking for. Thanks.