安卓启动页面

第一步

   创建Activity 

   创建xml

 Activity：

     

 private final int SPLASH_DISPLAY_LENGHT = 2000;//两秒后进入系统，时间可自行调整

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
//        setContentView(R.layout.splash);
        setContentView(R.layout.splash);
        //在BZLaunchActivity停留2秒然后进入BZLaunchActivity
        new android.os.Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                Intent mainIntent = new Intent(Splash.this,MainActivity.class);
                Splash.this.startActivity(mainIntent);
                Splash.this.finish();
            }
        },SPLASH_DISPLAY_LENGHT);

    }


}

Xml:

<ImageView
    android:id="@+id/imageView"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@color/colorRed"
    android:scaleType="fitXY"
    app:layout_constraintBottom_toBottomOf="parent"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    android:src = "@drawable/ad"
    />

在AndroidMafest.xml

<application
    android:allowBackup="true"
    android:icon="@mipmap/ic_launcher"
    android:label="@string/app_name"
    android:roundIcon="@mipmap/ic_launcher_round"
    android:supportsRtl="true"
    android:theme="@style/AppTheme">

    <activity android:name=".Splash"
      
      这个去掉系统自带空白
        android:theme="@android:style/Theme.Translucent"

        >
        <intent-filter>
            <action android:name="android.intent.action.MAIN" />

            <category android:name="android.intent.category.LAUNCHER" />
        </intent-filter>


    </activity>

    <activity android:name=".MainActivity">

        <!--<intent-filter>-->
            <!--<action android:name="android.intent.action.MAIN" />-->

            <!--<category android:name="android.intent.category.LAUNCHER" />-->
        <!--</intent-filter>-->
    </activity>
</application>