Android笔记：实现加载的progressDialog之后跳转到程序主界面

因为考虑到有些程序加载时间相对较长，所以在启动主界面之前，实现一个加载的progressDialog对话框来延缓，相对来说可以提高用户体验度。

如果是直接进入主界面，即activity，界面因为加载时间长，一片漆黑，让用户老觉得这程序不行。

贴出源码：

方法一：

public class LoadingActivity extends Activity {private ProgressDialog dialog;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);//设置一个progressdialog的弹窗dialog = ProgressDialog.show(this, null, "程序正在加载，请稍候…", true, false);//启动一个处理loading业务的线程new LoadingThread(this).start();}private class LoadingThread extends Thread {private LoadingActivity activity;public LoadingThread(LoadingActivity act) {Log.d(">>>>>LoadingThread", "构造方法");activity = act;}public void run() {Log.d(">>>>>LoadingThread", "传递message");//*********************//处理业务//*********************//发送消息activity.mHandler.sendEmptyMessage(0);}}//处理跳转到主Activityprivate Handler mHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {// TODO Auto-generated method stubLog.d(">>>>>Mhandler", "开始handleMessage");Intent mIntent = new Intent();mIntent.setClass(LoadingActivity.this, PalmHospital_main_Activity.class);startActivity(mIntent);LoadingActivity.this.finish();Log.d(">>>>>Mhandler", "LoadActivity关闭");if (dialog.isShowing())dialog.dismiss();}};}

方法二：相对来说要容易理解一点，，贴图

public class LoadingActivity extends Activity {private ProgressDialog dialog;@Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);//设置一个progressdialog的弹窗dialog = ProgressDialog.show(this, "加載中…", "正在搜尋。。。。，請稍後！");Thread thread = new Thread(new Runnable() {public void run() {//do…Message message = new Message();message.what = 0;mHandler.sendMessage(message);}});thread.start();}//处理跳转到主Activityprivate Handler mHandler = new Handler() {@Overridepublic void handleMessage(Message msg) {// TODO Auto-generated method stubLog.d(">>>>>Mhandler", "开始handleMessage");Intent mIntent = new Intent();mIntent.setClass(LoadingActivity.this, PalmHospital_main_Activity.class);startActivity(mIntent);LoadingActivity.this.finish();Log.d(">>>>>Mhandler", "LoadActivity关闭");if (msg.what == 0) {dialog.dismiss();}}};}

却只能这样。只有对爱的人，我们才会斤斤计较，锱铢必较。

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