在android中添加欢迎页

<activity
            android:name="com.jerehedu.headline.WelcomeActivity"
            android:label="@string/title_activity_welcome" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.jerehedu.headline.MainActivity"
            android:label="@string/app_name" >
        </activity>

protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);//这句表示删除默认的titlebar
        setContentView(R.layout.activity_welcome);
        new Handler().postDelayed(new Runnable(){ //这里相当于Handler的第一个参数
               
             @Override
             public void run() { 
                 Intent mainIntent = new Intent(WelcomeActivity.this,MainActivity.class); 
                 WelcomeActivity.this.startActivity(mainIntent); 
                     WelcomeActivity.this.finish(); 
             } 
                 
            }, 1000); //这里的1000指1000毫秒即1秒
    }