实现了一个延时几秒钟的开始activity的图像画面，然后转换到其他Activity

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.wo.kingofbluetooth">

<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".StartActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".MainActivity">

</activity>
</application>

</manifest>

package com.example.wo.kingofbluetooth;

import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.Handler;
import android.support.annotation.Nullable;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.WindowManager;

public class MainActivity extends AppCompatActivity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}

package com.example.wo.kingofbluetooth;

import android.app.Activity;
import android.content.Intent;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.os.Handler;
import android.view.WindowManager;

import java.util.Timer;
import java.util.TimerTask;

/**
* Created by yuanlifu on 2016/8/25.
*/
public class StartActivity extends Activity{

private static final int LOAD_DISPLAY_TIME = 2500;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
getWindow().setFormat(PixelFormat.RGBA_8888);
getWindow().addFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.start_layout);

new Handler().postDelayed(new Runnable() {
@Override
public void run() {
Intent mainIntent = new Intent(StartActivity.this,MainActivity.class);
StartActivity.this.startActivity(mainIntent);
StartActivity.this.finish();
}
},LOAD_DISPLAY_TIME);
}
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingBottom="@dimen/activity_vertical_margin"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
tools:context="com.example.wo.kingofbluetooth.MainActivity">

<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Hello World!" />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:background="@mipmap/start">

<TextView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:text="@string/saying"
android:typeface="serif"
android:textSize="17sp"
android:textColor="@color/lightblue"/>

</RelativeLayout>