Android中一种欢迎界面模式
jopen
10年前
在android应用中，在进入主界面之前经常会有一段用于过渡的欢迎界面，下面介绍一种，代码如下：
WelcomeActivity：
package com.home.welcompage; import java.util.Random; import android.app.Activity; import android.content.Intent; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.view.View; import android.view.View.OnClickListener; import android.view.animation.Animation; import android.view.animation.AnimationUtils; import android.widget.ImageView; import android.widget.LinearLayout; public class WelcomeActivity extends Activity { private ImageView welcomeImage; private Thread t1, t2; private Handler handler; private int rand = new Random().nextInt(4);; private Animation animation; private int pageNumber = 1; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.welcome); welcomeImage = (ImageView) findViewById(R.id.welcome_iv); animation = AnimationUtils.loadAnimation(this, R.anim.scal_anim); LinearLayout layout = (LinearLayout) findViewById(R.id.welcome_layout); layout.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { if (pageNumber == 2) { t1.interrupt(); t2.interrupt(); turnPage();// 跳转界面 } } }); handler = new Handler() { @Override public void handleMessage(Message msg) { super.handleMessage(msg); if (msg.what == 0) { switch (rand) { case 0: // 设置动画背景 startAnimation(R.drawable.back1); break; case 1: startAnimation(R.drawable.back2); break; case 2: startAnimation(R.drawable.back3); break; case 3: startAnimation(R.drawable.back4); break; default: break; } } } }; t1 = new Thread(new Runnable() { @Override public void run() { try { Thread.sleep(3000); handler.sendEmptyMessage(0); } catch (InterruptedException e) { e.printStackTrace(); } } }); t1.start(); t2 = new Thread(new Runnable() { @Override public void run() { try { Thread.sleep(4000); turnPage();// 跳转界面 } catch (InterruptedException e) { e.printStackTrace(); } } }); } /** * 跳转到主界面 */ private void turnPage() { Intent intent = new Intent(WelcomeActivity.this, MainActivity.class); WelcomeActivity.this.startActivity(intent); WelcomeActivity.this.finish(); } /** * 设置动画背景 * * @param imageSource */ private void startAnimation(int imageSource) { welcomeImage.setBackgroundDrawable(getResources().getDrawable( imageSource)); welcomeImage.setAnimation(animation); welcomeImage.startAnimation(animation); t2.start(); pageNumber = 2; } } <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:id="@+id/welcome_layout"> <ImageView android:id="@+id/welcome_iv" android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/logo"/> </LinearLayout>
主界面省略。
动画：scal_anim.xml：