多線程任務開發可以通過以下幾個方式實現：
1、Handler，如下：
public class MainActivity extends AppCompatActivity {
private MyHandler mHandler = new MyHandler(this);
private TextView mTextView ;
private static class MyHandler extends Handler {
private WeakReference<Context> reference;
public MyHandler(Context context) {
reference = new WeakReference<>(context);
}
@Override
public void handleMessage(Message msg) {
MainActivity activity = (MainActivity) reference.get();
if(activity != null){
activity.mTextView.setText("");
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mTextView = (TextView)findViewById(R.id.textview);
loadData();
}
private void loadData() {
//...request
Message message = Message.obtain();
mHandler.sendMessage(message);
}
@Override
protected void onDestroy() {
super.onDestroy();
mHandler.removeCallbacksAndMessages(null);
}
} 請參考：http://blog.csdn.net/qq_29266921/article/details/54861596點擊打開鏈接
AsyncTask，如下：
public class MainActivity extends AppCompatActivity {
private MyAsyncTask mySyncTask= new MyAsyncTask (this);
private static class MyAsyncTask extends AsyncTask<Void, Void, Void> {
private WeakReference<Context> weakReference;
public MyAsyncTask(Context context) {
weakReference = new WeakReference<>(context);
}
@Override
protected Void doInBackground(Void... params) {
SystemClock.sleep(10000);
return null;
}
@Override
protected void onPostExecute(Void aVoid) {
super.onPostExecute(aVoid);
MainActivity activity = (MainActivity) weakReference.get();
if (activity != null) {
//...
}
}
}
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
mySyncTask.excute();
}
@Override
protected void onDestroy() {
super.onDestroy();
myAsyncTask.cancle();
}
}
