赞
踩
这里用两种方式实现应用的启动页面:
1,使用Handler的postDelayed(runnable, delayTime)方法:
将runnable对象加入handler queue,当经过delayTime后,runnable会运行在handler所绑定的线程上。
2,使用定时器:
- package com.example.demo;
-
- import java.util.Timer;
- import java.util.TimerTask;
-
- import android.app.Activity;
- import android.content.Intent;
- import android.os.Bundle;
-
- public class WelcomeActivity extends Activity {
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.welcom_layout);
-
- welcom();
-
- }
-
- private void welcom() {
- /*new Handler().postDelayed(new Runnable() {
-
- @Override
- public void run() {
- Intent mainIntent = new Intent(getApplicationContext(), MainActivity.class);
- startActivity(mainIntent);
-
- WelcomeActivity.this.finish();
- }
- }, 2000);*/
-
- new Timer().schedule(new TimerTask() {
-
- @Override
- public void run() {
- Intent mainIntent = new Intent(getApplicationContext(), MainActivity.class);
- startActivity(mainIntent);
-
- WelcomeActivity.this.finish();
- }
- }, 2000);
- }
- }
- <?xml version="1.0" encoding="utf-8"?>
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- android:layout_width="match_parent"
- android:layout_height="match_parent" >
-
- <ImageView
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:background="@drawable/huoying" />
-
- </RelativeLayout>
启动之后的应用主界面:
- package com.example.demo;
-
- import android.app.Activity;
- import android.os.Bundle;
-
- public class MainActivity extends Activity {
-
- @Override
- protected void onCreate(Bundle savedInstanceState) {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.activity_main);
- }
-
- }
- <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:orientation="vertical" >
-
- <TextView
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- android:text="@string/hello_world" />
-
- </LinearLayout>
在manifest中,我们设置了activity 的 android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen"属性,这样这个欢迎页面就会全屏显示:
- <?xml version="1.0" encoding="utf-8"?>
- <manifest xmlns:android="http://schemas.android.com/apk/res/android"
- package="com.example.demo"
- android:versionCode="1"
- android:versionName="1.0" >
-
- <uses-sdk
- android:minSdkVersion="8"
- android:targetSdkVersion="17" />
-
- <application
- android:allowBackup="true"
- android:icon="@drawable/ic_launcher"
- android:label="@string/app_name"
- android:theme="@style/AppTheme" >
- <activity
- android:name="com.example.demo.MainActivity"
- android:label="@string/app_name" >
- </activity>
- <activity android:name="com.example.demo.WelcomeActivity"
- android:theme="@android:style/Theme.NoTitleBar.Fullscreen">
- <intent-filter>
- <action android:name="android.intent.action.MAIN" />
-
- <category android:name="android.intent.category.LAUNCHER" />
- </intent-filter>
- </activity>
- </application>
-
- </manifest>
下面再说一下界面全屏的设置方法:
1,在manifest中设置activity / application 的 android:theme属性:
设置为:@android:style/Theme.Black.NoTitleBar 这样并非是全屏,但是不会显示actionBar;
设置为:@android:style/Theme.Black.NoTitleBar.Fullscreen 这样就会全屏显示
(还可以设置:android:screenOrientation="landscape" 屏幕就会横屏显示了)
2,在代码中设置:
- //不显示ActionBar
- requestWindowFeature(Window.FEATURE_NO_TITLE);
- //不显示系统的通知栏()全屏
- getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
一定要记住要在setContentView()之前设置窗口的信息。
Copyright © 2003-2013 www.wpsshop.cn 版权所有,并保留所有权利。