android程序的启动页面(SplashActivity)

第一种

import android.content.Intent;  
import android.os.Handler;  
import android.os.Message;  
import android.support.v7.app.AppCompatActivity;  
import android.os.Bundle;  
import android.view.KeyEvent;  
import android.view.WindowManager;  
  
public class WelcomeActivity extends AppCompatActivity {  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);//满屏显示  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.activity_welcome);  
  
        handler.sendEmptyMessageDelayed(1,2000);  
    }  
  
    private Handler handler = new Handler(new Handler.Callback() {  
        @Override  
        public boolean handleMessage(Message message) {  
            if (message.what == 1){  
                  Intent intent = new Intent(WelcomeActivity.this, MainActivity.class);  
                  startActivity(intent);  
                  finish();  
                  
            }  
            return false;  
        }  
    });  
  
    @Override  
    public boolean onKeyDown(int keyCode, KeyEvent event) {  
        if (keyCode == KeyEvent.KEYCODE_BACK){  
            return false;  
        }  
        return false;  
    }  
} 

第二种

<?xml version="1.0" encoding="utf-8"?>  
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    xmlns:app="http://schemas.android.com/apk/res-auto"  
    xmlns:tools="http://schemas.android.com/tools"  
    android:layout_width="match_parent"  
    android:layout_height="match_parent"  
    android:background="@drawable/splash_background"  
    tools:context=".SplashActivity">  
  
</RelativeLayout> 

 

import android.content.Intent;  
import android.os.Handler;  
import android.support.v7.app.AppCompatActivity;  
import android.os.Bundle;  
import android.view.Window;  
import android.view.WindowManager;  
  
public class SplashActivity extends AppCompatActivity {  
  
    @Override  
    protected void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
  
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,  
                WindowManager.LayoutParams.FLAG_FULLSCREEN);  
        this.requestWindowFeature(Window.FEATURE_NO_TITLE);  
  
        setContentView(R.layout.activity_splash);  
  
        new Handler().postDelayed(new Runnable() {  
            public void run() {  
                Intent intent = new Intent();  
                intent.setClass(SplashActivity.this, MainActivity.class);  
                startActivity(intent);  
                finish();  
            }  
        }, 1000 * 3);  
    }  
  
    @Override  
    public void onBackPressed() {  
        //super.onBackPressed();  
    }  
}