android实现加载的progressDialog之后跳转到程序主界面

素颜马尾好姑娘i 2022-10-14 14:48 178阅读 0赞

转载：[http://blog.csdn.net/mars2639/article/details/6615424\#comments][http_blog.csdn.net_mars2639_article_details_6615424_comments]

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;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
                // TODO Auto-generated method stub
                super.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Activity
        private Handler mHandler = new Handler() {
                @Override
                public void handleMessage(Message msg) {
                        // TODO Auto-generated method stub
                        Log.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

![SouthEast][]

public class LoadingActivity extends Activity {
        private ProgressDialog dialog;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
                // TODO Auto-generated method stub
                super.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Activity
        private Handler mHandler = new Handler() {
                @Override
                public void handleMessage(Message msg) {
                        // TODO Auto-generated method stub
                        Log.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();
                    }
                }
        };
    }

[http_blog.csdn.net_mars2639_article_details_6615424_comments]: http://blog.csdn.net/mars2639/article/details/6615424#comments
[SouthEast]: /images/20221014/d2a13921509b4d59b7021ea0d8aa9773.png