启动画面未首先打开

Question

它不会先打开启动画面，而是打开主 activity，然后启动画面 screen.What 可能是 problem.The 启动画面不会消失，直到我按下后退按钮。

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.content.Intent;
import android.os.Handler;

public class MainActivity extends AppCompatActivity {
  private static int SPLASH_TIME_OUT=4000;
  @Override
  protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  new Handler().postDelayed(new Runnable(){
     public void run(){
     Intent homeIntent=new Intent(MainActivity.this,Splash.class);
     startActivity(homeIntent);
     finish();
     }
        }, SPLASH_TIME_OUT);
   }
}

Answer 1

在AndroidManifest.xml、

<activity
    android:name=".SplashActivity"
    android:noHistory="true"
    android:theme="@style/Theme.AppCompat.Light.NoActionBar.FullScreen">
    <intent-filter>
        <action android:name="android.intent.action.MAIN" />

        <category android:name="android.intent.category.LAUNCHER" />
    </intent-filter>
</activity>
<activity
    android:name=".MainActivity"
    android:theme="@style/Theme.AppCompat.Light.NoActionBar.FullScreen" />

并且在splashscreen.javaonCreate函数中，可以设置定时器调用mainactivity

new Timer().schedule(new TimerTask() {
            @Override
            public void run() {
                startActivity(new Intent(getApplicationContext(), MainActivity.class));
            }
        },4000);

希望对您有所帮助

Answer 2

制作启动画面的最佳方式

你需要什么：

两个Activity：MainActivity.java和SplashScreen.java
两种布局：layout_main_activity.xml 和 layout_splashscreen.xml

在您的 AndroidManifest.xml 中声明两个 Activity。 SplashScreen 必须是主体 Activity（MAIN 和 LAUNCHER）：

        <!-- Splash screen -->
        <activity
            android:name="com.package.SplashScreen"
            android:label="@string/app_name"
            android:screenOrientation="portrait"
            android:theme="@android:style/Theme.Black.NoTitleBar" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

        <!-- Main activity -->
        <activity
            android:name="com.package.MainActivity"
            android:label="@string/app_name" >
        </activity>

SplashScreen.java :

public class SplashScreen extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_splash);

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                Intent i = new Intent(SplashScreen.this, MainActivity.class);
                startActivity(i);
                finish();
            }
        }, 3000); // for 3 seconds
    }

}

启动画面未首先打开

Splash screen not opening first

android

splash-screen