控制toast出现位置以及progressbar的出现消失
import android.app.Activity;import android.app.ProgressDialog;import android.os.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;/** * Class which shows how to work with handler class * @author FaYnaSoft Labs */public class Main extends Activity { private Button clickBtn; private ProgressDialog progressDialog; private Handler handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); progressDialog.dismiss(); } }; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); clickBtn = (Button) findViewById(R.id.click); clickBtn.setText("Click me"); clickBtn.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { processThread(); } }); } private void processThread() { progressDialog = ProgressDialog.show(Main.this, "", "Doing..."); new Thread() { public void run() { longTimeMethod(); handler.sendEmptyMessage(0); } }.start(); } private void longTimeMethod() { try { Thread.sleep(10000); } catch (InterruptedException e) { Log.e("tag", e.getMessage()); } }}?