主要实现效果：
--------------程序启动，进入loading界面，loading界面显示背景图 及 进度条动画，后台启动线程进行相应的初始化操作，loading界面更新相应的初始化提示信息，初始化完成，打开并进入主界面，关闭loading界面，如果初始化超时，则弹出提示，退出程序。
loading.java
------------ package com.hello; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.Window; import android.widget.TextView; import android.widget.Toast; public class loading extends Activity { int MSG_INIT_OK = 1; int MSG_INIT_INFO = 2; int MSG_INIT_TIMEOUT = 9; boolean isTimeout = false; TextView tvInfo ; public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.loading); tvInfo = (TextView)findViewById(R.id.tvInfo); initSystem(); } private void initSystem(){ initThread(); mHandler.postDelayed(timeOutTask,60000); // 60秒超时 } public Handler mHandler = new Handler(){ public void handleMessage(Message msg){ if(msg.what == MSG_INIT_TIMEOUT){ if (mHandler != null && timeOutTask != null ){ mHandler.removeCallbacks(timeOutTask); } Toast.makeText(loading. this, "timeout", Toast.LENGTH_LONG).show(); loading. this.finish(); } else if(msg.what == MSG_INIT_OK){ if (mHandler != null && timeOutTask != null ){ mHandler.removeCallbacks(timeOutTask); } startActivity( new Intent(getApplication(),MainActivity. class)); loading. this.finish(); } else if(msg.what == MSG_INIT_INFO){ String info = msg.obj.toString(); tvInfo.setText(info); } } }; Runnable timeOutTask = new Runnable() { public void run() { isTimeout = true; Message msg = Message.obtain(); msg.what = MSG_INIT_TIMEOUT; mHandler.sendMessage(msg); } }; private void initThread(){ new Thread(){ public void run() { try { if(!isTimeout){ sendInitInfo("初始化 step 1"); Thread.sleep(1000); // TODO 1 } if(!isTimeout){ sendInitInfo("初始化 step 2"); Thread.sleep(2000); // TODO 2 } if(!isTimeout){ sendInitInfo("初始化 step 3"); Thread.sleep(3000); // TODO 2 } if(!isTimeout){ // 初始化完成 sendInitInfo("初始化完成"); Message msg2 = Message.obtain(); msg2.what = MSG_INIT_OK; mHandler.sendMessage(msg2); } } catch (InterruptedException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }.start(); } private void sendInitInfo(String info){ Message msg1 = Message.obtain(); msg1.what = MSG_INIT_INFO; msg1.obj = info; mHandler.sendMessage(msg1); } }
<? xml version="1.0" encoding="utf-8" ?> < LinearLayout xmlns:android ="http://schemas.android.com/apk/res/android" android:layout_width ="match_parent" android:layout_height ="match_parent" android:background ="@drawable/pf_loading_bg" android:orientation ="horizontal" > < TableLayout android:layout_width ="match_parent" android:layout_height ="match_parent" > < TableRow > < ProgressBar android:id ="@+id/progressBar1" android:layout_width ="fill_parent" android:layout_height ="wrap_content" android:paddingTop ="10dip" android:paddingLeft ="70dip" android:paddingRight ="70dip" style ="@style/loading" > </ ProgressBar > </ TableRow > < TableRow > < TextView android:text ="TextView" android:layout_height ="wrap_content" android:id ="@+id/tvInfo" android:layout_width ="wrap_content" ></ TextView > </ TableRow > </ TableLayout > </ LinearLayout >
res/values/mystyle.xml
---------------------- <? xml version="1.0" encoding="utf-8" ?> < resources > < style name ="loading" parent ="@android:style/Widget.ProgressBar.Large" > < item name ="android:indeterminateDrawable" >@anim/loading </ item > </ style > </ resources >
<? xml version="1.0" encoding="utf-8" ?> < animation-list android:oneshot ="false" xmlns:android ="http://schemas.android.com/apk/res/android" > < item android:duration ="100" android:drawable ="@drawable/loading1" /> < item android:duration ="100" android:drawable ="@drawable/loading2" /> < item android:duration ="100" android:drawable ="@drawable/loading3" /> </ animation-list >
res/drawable-hdpi/
-------------------loading_bg.png , loading1.png , loading2.png ,loading3.png AndroidMainfest.xml------------------- <? xml version="1.0" encoding="utf-8" ?> < manifest xmlns:android ="http://schemas.android.com/apk/res/android" package ="com.hello" android:versionCode ="1" android:versionName ="1.0" > < application android:icon ="@drawable/icon" android:label ="@string/app_name" > < activity android:name =".MainActivity" android:label ="@string/app_name" > </ activity > < activity android:name =".loading" > < intent-filter > < action android:name ="android.intent.action.MAIN" /> < category android:name ="android.intent.category.LAUNCHER" /> </ intent-filter > </ activity > </ application > </ manifest >