Android课程设计第六天欢迎界面（跳转）

package com.example.myapplication;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.widget.TextView;

/**
* Created by 樱花落舞 on 2017/6/13.
*/

public class JumpActivity extends Activity {
TextView textView;
int time=3;
Handler handler=new Handler();
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.jump);
textView= (TextView) findViewById(R.id.textview);

handler.postDelayed(runnable,1000);

}

Runnable runnable=new Runnable() {
@Override
public void run() {
time--;
handler.postDelayed(this,1000);
textView.setText("+"+time+"s");

if(time==0){
Intent intent = new Intent(JumpActivity.this,TestActivity.class);
startActivity(intent);
finish();
}else {
textView.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent intent=new Intent(JumpActivity.this,TestActivity.class);
startActivity(intent);
//结束线程
handler.removeCallbacks(runnable);
finish();
}
});
}
}
};
}

package com.example.myapplication;

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

public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
intent.setClass(MainActivity.this,JumpActivity.class);
startActivity(intent);
MainActivity.this.finish();
}
Intent intent = new Intent();
}

package com.example.myapplication;

import android.app.Activity;
import android.os.Bundle;
import android.support.annotation.Nullable;

/**
* Created by 樱花落舞 on 2017/6/13.
*/

public class TestActivity extends Activity {
@Override
protected void onCreate(@Nullable Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.empty_activity);
}
}

<?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"
tools:context="com.example.myapplication.MainActivity"

android:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@mipmap/bg"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="+3秒"
android:id="@+id/text"
android:textSize="20dp"
android:layout_alignParentRight="true"/>

</RelativeLayout>

<?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">
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:background="@mipmap/a"/>
</RelativeLayout>

<?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:orientation="vertical">
<ImageView
android:layout_width="match_parent"
android:layout_height="match_parent"
android:src="@mipmap/bg"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:id="@+id/textview"
android:textSize="20sp"
android:text="+3s"
android:layout_alignParentRight="true"/>
</RelativeLayout>

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

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

<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".JumpActivity"
android:label="@string/app_name"
>
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity"/>
</activity>
<activity android:name=".TestActivity"
android:label="@string/app_name">
<meta-data
android:name="android.support.PARENT_ACTIVITY"
android:value=".MainActivity"/>

</activity>
</application>

</manifest>