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安卓程序打开时会有一个全屏的欢迎界面,这里我用Splash写一个欢迎界面,代码如下
MainActivity.java
package cn.wuxiaocheng.splash;
import android.app.Activity;
import android.os.Bundle;
import android.view.Window;
public class MainActivity extends Activity {
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE);
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
SplashActivity.java
package cn.wuxiaocheng.splash;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.Window;
public class SplashActivity extends Activity {
private final int SPLASH_DISPLAY_LENGHT=3000; // 延时3秒,,可以不写这段,直接在下面SPLASH_DISPLAY_LENGHT改为延时的时间就行
//加载欢迎界面
@Override
protected void onCreate(Bundle savedInstanceState) {
requestWindowFeature(Window.FEATURE_NO_TITLE); //设置无标题
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
// 为了减少代码使用匿名Handler创建一个延时的调用
new Handler().postDelayed(new Runnable(){
@Override
public void run() {
//通过Intent打开最终真正的主界面Main这个Activity
Intent mainIntent = new Intent(SplashActivity.this,MainActivity.class);
//启动Main界面
SplashActivity.this.startActivity(mainIntent);
//关闭自己这个开场屏
SplashActivity.this.finish();
}
}, SPLASH_DISPLAY_LENGHT);
}
}
activity_welcome.xml
<?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:orientation="vertical"> <ImageView android:layout_width="match_parent" android:layout_height="match_parent" android:background="@drawable/splash_welcome"/> </LinearLayout>
还要在AndroidManifest.xml里设置欢迎界面为第一启动界面
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" package="cn.wuxiaocheng.splash" android:versionCode="1" android:versionName="1.0" > <uses-sdk android:minSdkVersion="14" android:targetSdkVersion="21" /> <application android:allowBackup="true" android:icon="@drawable/ic_launcher" android:label="@string/app_name" android:theme="@style/AppTheme" > <!-- 下面这个activity设置打开程序是第一个页面为欢迎界面--> <activity android:name="cn.wuxiaocheng.splash.SplashActivity" android:label="@string/app_name" > <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name="cn.wuxiaocheng.splash.MainActivity"></activity> </application> </manifest>
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原文地址:http://my.oschina.net/u/2264427/blog/477680