欢迎界面

1、效果

2、分析

整体布局为相对布局

ImageView填充整个界面

TextView放置于图片的下方

3、代码

1、LauncherActivity.java

public class LauncherActivity extends Activity { private RelativeLayout activity_launcher; private AnimationSet animationSet; private boolean hasStart; private Handler handler = new Handler(){ @Override public void handleMessage(Message msg) { if(!hasStart) { hasStart = true; Intent intent = new Intent(LauncherActivity.this,MainActivity.class); startActivity(intent); finish(); } } }; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); initView(); initAnimation(); handler.sendEmptyMessageDelayed(0,3000); } @Override protected void onDestroy() { handler.removeCallbacksAndMessages(null); super.onDestroy(); } private void initView() { setContentView(R.layout.activity_launcher); activity_launcher = (RelativeLayout)findViewById(R.id.activity_launcher); } private void initAnimation() { animationSet = new AnimationSet(true); ScaleAnimation scaleAnimation = new ScaleAnimation(0,1f,0,1f, Animation.RELATIVE_TO_SELF,0.5f,Animation.RELATIVE_TO_SELF,0.5f); scaleAnimation.setDuration(2000); scaleAnimation.setFillAfter(true); AlphaAnimation alphaAnimation = new AlphaAnimation(0,1f); alphaAnimation.setDuration(2000); alphaAnimation.setFillAfter(true); animationSet.addAnimation(scaleAnimation); animationSet.addAnimation(alphaAnimation); activity_launcher.startAnimation(animationSet); } }

1、initView();//主要负责初始化相关控件

2、initAnimation();//为界面添加动画效果

3、handler.sendEmptyMessageDelayed(0,3000);//指定经过3s跳转到主界面

2、activity_launcher.xml

<?xml version="1.0" encoding="utf-8"?> <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_launcher" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.eyckwu.readbar.controller.activity.LauncherActivity"> <ImageView android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/splash" /> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignParentBottom="true" android:layout_marginBottom="33dp" android:layout_marginLeft="33dp" android:text="知乎读吧" android:textColor="#ffffff" android:textSize="33sp" /> </RelativeLayout>