首页 / 操作系统 / Linux / Android程序创建启动界面
一般的Android应用程序在启动时都会显示一个启动界面,可以显示产品的LOGO,作者的信息或者应用的版本信息等,当然,除了这些,在这段时间内还可以对系统状况进行检测,比如网络是否通,电源是否充足等,或者,预先加载程序所需要的相关数据等。下面我们来看一看怎样制作Splash界面。首先新建一个splashscreen.xml布局文件,我们已经在res/drawable目录下放置了一张启动图片home_gradient.png:<LinearLayout android:id="@+id/LinearLayout01"android:layout_width="fill_parent"android:layout_height="fill_parent"xmlns:android="http://schemas.android.com/apk/res/android"android:gravity="center|bottom"android:background="@drawable/home_gradient"android:orientation="vertical"><ImageView android:layout_marginTop="-60dip" android:paddingLeft="20dip" android:paddingRight="20dip" android:scaleType="centerInside" android:layout_width="wrap_content" android:layout_height="wrap_content" android:id="@+id/logo"></ImageView><!--android:typeface 字体风格--><TextView android:text="@+id/TextView01"android:layout_width="wrap_content"android:layout_height="wrap_content"android:layout_marginTop="20dip"android:typeface="serif"android:shadowDx="0"android:shadowDy="2"android:shadowRadius="1"android:shadowColor="#FFFFFF"android:textColor="@drawable/white"android:textSize="20dip"android:id="@+id/versionNumber"android:gravity="center_horizontal"></TextView></LinearLayout>然后我们新建一个SplashScreen类:package com.uutroy.android.bjtuer; import android.app.Activity;import android.content.Intent;import android.content.pm.PackageInfo;import android.content.pm.PackageManager;import android.content.pm.PackageManager.NameNotFoundException;import android.graphics.PixelFormat;import android.os.Bundle;import android.os.Handler;import android.view.WindowManager;import android.widget.TextView; public class SplashScreen extends Activity { @Overrideprotected void onCreate(Bundle savedInstanceState) {// TODO Auto-generated method stubsuper.onCreate(savedInstanceState);getWindow().setFormat(PixelFormat.RGBA_8888);getWindow().addFlags(WindowManager.LayoutParams.FLAG_DITHER); setContentView(R.layout.splashscreen); // Display the current version numberPackageManager pm = getPackageManager();try {PackageInfo pi = pm.getPackageInfo("com.uutroy.android.bjtuer", 0);TextView versionNumber = (TextView) findViewById(R.id.versionNumber);versionNumber.setText("Version " + pi.versionName +"
"+"天堂皓月");} catch (NameNotFoundException e) {e.printStackTrace();} new Handler().postDelayed(new Runnable() {public void run() {/* Create an Intent that will start the Main Activity. */Intent mainIntent = new Intent(SplashScreen.this,BJTUerActivity.class);SplashScreen.this.startActivity(mainIntent);SplashScreen.this.finish();}}, 2500);}}