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package com.example.jinritt;import android.content.Intent;import android.os.Handler;import android.os.Message;import android.support.v7.app.AppCompatActivity;import android.os.Bundle;public class MainActivity extends AppCompatActivity {    private Handler handler=new Handler(){        @Override        public void handleMessage(Message msg) {           switch (msg.what){               case 0:               Intent intent = new Intent(MainActivity.this,otherActivity.class);                    startActivity(intent);                   finish();                   break;           }        }    };    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        handler.sendEmptyMessageDelayed(0,3000);    }} <?xml version="1.0" encoding="utf-8"?><RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools" android:id="@+id/activity_main"    android:background="@drawable/a1"    android:layout_width="match_parent"    android:layout_height="match_parent"  ></RelativeLayout>

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