Android studio 启动页倒计时 登录 登陆后跳转

新建项目four

首先把倒计时跟登录联系起来
Mainactivity（登录按钮设置监听，为之后登录跳转准备）

public void startActivity2(View view){
        startActivity(new Intent(this,MainActivity2.class));
    }

package com.stefan.four;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;

import androidx.appcompat.app.AppCompatActivity;

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

public class MainActivity extends AppCompatActivity {

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

    }
    public void startActivity2(View view){
        startActivity(new Intent(this,MainActivity2.class));
    }
}

SpActivity微博倒计时页面

package com.stefan.four;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.os.Handler;
import android.view.View;
import android.view.WindowManager;
import android.widget.TextView;

import androidx.appcompat.app.AppCompatActivity;

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

public class SpActivity extends AppCompatActivity implements View.OnClickListener {

    private int recLen = 5;//跳过倒计时提示5秒
    private TextView tv;
    Timer timer = new Timer();
    private Handler handler;
    private Runnable runnable;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //定义全屏参数
        int flag= WindowManager.LayoutParams.FLAG_FULLSCREEN;
        //设置当前窗体为全屏显示
        getWindow().setFlags(flag, flag);
        setContentView(R.layout.activity_sp);
        initView();
        timer.schedule(task, 1000, 1000);//等待时间一秒，停顿时间一秒
        handler = new Handler();
        handler.postDelayed(runnable =new Runnable() {
            @Override
            public void run() {
                //从闪屏界面跳转到首界面
                Intent intent = new Intent(SpActivity.this, MainActivity.class);
                startActivity(intent);
                finish();
            }
        }, 5000);//延迟5S后发送handler信息

    }

    private void initView() {
        tv = findViewById(R.id.tv);//跳过
        tv.setOnClickListener(this);//跳过监听
    }

    TimerTask task = new TimerTask() {
        @Override
        public void run() {
            runOnUiThread(new Runnable() { // UI thread
                @SuppressLint("SetTextI18n")
                @Override
                public void run() {
                    recLen--;
                    tv.setText("跳过 " + recLen);
                    if (recLen < 0) {
                        timer.cancel();
                        tv.setVisibility(View.GONE);//倒计时到0隐藏字体
                    }
                }
            });
        }
    };

    /**
     * 点击跳过
     */
    @Override
    public void onClick(View view) {
        if (view.getId() == R.id.tv) {//从闪屏界面跳转到首界面
            Intent intent = new Intent(SpActivity.this, MainActivity.class);
            startActivity(intent);
            finish();
            if (runnable != null) {
                handler.removeCallbacks(runnable);
            }
        }
    }
}

activity_main.xml登录页面

实现监听android:onClick=“startActivity2”

<Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/login"
            tools:ignore="ButtonStyle"
            android:onClick="startActivity2">

        </Button>

全部代码

<?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"
    tools:context=".MainActivity"

    android:orientation="vertical"
    android:background="@drawable/a"
    tools:ignore="ExtraText">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="60dp"
        android:layout_marginTop="20dp"
        android:gravity="center">

        <ImageView
            android:layout_width="126dp"
            android:layout_height="match_parent"
            android:src="@drawable/ab">

        </ImageView>

        <TextView
            android:layout_width="152dp"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="@string/welcome"
            android:textColor="#000000"
            android:textSize="30sp"
            android:textStyle="bold">

        </TextView>

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ab">

        </ImageView>

    </LinearLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginTop="200dp"
        android:layout_marginStart="50dp"
        android:layout_marginEnd="50dp">

        <TextView
            android:id="@+id/text_1"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:text="@string/username"
            android:textSize="25sp"
            android:textColor="#000000"
            android:textStyle="bold">

        </TextView>

        <EditText
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@+id/text_1">

        </EditText>
    </RelativeLayout>
    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginEnd="50dp">

        <TextView
            android:id="@+id/text_2"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:text="@string/password"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold">

        </TextView>

        <EditText
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@+id/text_2">

        </EditText>
    </RelativeLayout>

    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_gravity="center">
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/login"
            tools:ignore="ButtonStyle"
            android:onClick="startActivity2">

        </Button>
        <Button
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="@string/enroll"
            tools:ignore="ButtonStyle">

        </Button>
    </LinearLayout>
</LinearLayout>

activity_sp.xml倒计时微博布局

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout 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/bcg">

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <TextView
            android:id="@+id/tv"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_alignParentRight="true"
            android:layout_marginRight="20dp"
            android:layout_marginTop="10dp"
            android:textSize="20sp" />
    </RelativeLayout>

</LinearLayout>

AndroidManifest.xml 修改下intent，让微博页先启动，就是SpActivity

<activity
            android:name=".SpActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

添加了几个代码类记得加上！

<activity
            android:name=".MainActivity"
            android:exported="false"
            />
        <activity
            android:name=".MainActivity2"
            android:exported="false"
            />

全部代码

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

    <application
        android:allowBackup="true"
        android:icon="@mipmap/bcdd"
        android:label="微博"
        android:roundIcon="@mipmap/bcdd"
        android:supportsRtl="true"
        android:theme="@style/Theme.Test"
        tools:ignore="ExtraText">
        <activity
            android:name=".MainActivity"
            android:exported="false"
            />
        <activity
            android:name=".MainActivity2"
            android:exported="false"
            />


        <activity
            android:name=".SpActivity"
            android:exported="true">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

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

</manifest>

之后是登录页面的跳转 点击登录后能跳转到下一个页面
MainActivity2

package com.stefan.four;

import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;

public class MainActivity2 extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main2);
    }
}

activity_main2.xml （跳转之后的页面布局）

<?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"
    tools:context=".MainActivity"

    android:orientation="vertical"
    android:background="@drawable/a"
    tools:ignore="ExtraText">
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="60dp"
        android:layout_marginTop="20dp"
        android:gravity="center">

        <ImageView
            android:layout_width="126dp"
            android:layout_height="match_parent"
            android:src="@drawable/ab">

        </ImageView>

        <TextView
            android:layout_width="155dp"
            android:layout_height="match_parent"
            android:gravity="center"
            android:text="@string/welcomee"
            android:textColor="#000000"
            android:textSize="30sp"
            android:textStyle="bold">

        </TextView>

        <ImageView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:src="@drawable/ab">

        </ImageView>

    </LinearLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginTop="200dp"
        android:layout_marginStart="50dp"
        android:layout_marginEnd="50dp">

        <TextView
            android:id="@+id/text_6"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:text="@string/username"
            android:textSize="25sp"
            android:textColor="#000000"
            android:textStyle="bold">

        </TextView>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@+id/text_6"
            android:text="@string/usernamee"
            android:textSize="30sp"
            android:textColor="#000000"
            android:textStyle="bold">

        </TextView>
    </RelativeLayout>

    <RelativeLayout
        android:layout_width="match_parent"
        android:layout_height="70dp"
        android:layout_marginStart="50dp"
        android:layout_marginEnd="50dp">

        <TextView
            android:id="@+id/text_7"
            android:layout_width="wrap_content"
            android:layout_height="60dp"
            android:text="@string/passwordd"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold">

        </TextView>

        <TextView
            android:layout_width="match_parent"
            android:layout_height="50dp"
            android:layout_toEndOf="@+id/text_7"
            android:text="@string/passworddd"
            android:textColor="#000000"
            android:textSize="25sp"
            android:textStyle="bold">

        </TextView>
    </RelativeLayout>


</LinearLayout>

其他相关的xml（drawable需要添加相关的照片，自己找）
strings.xml

<resources>
    <string name="app_name">four</string>
    <string name="welcome">欢迎登录</string>
    <string name="welcomee">个人信息</string>
    <string name="username">学号:</string>
    <string name="usernamee">2019</string>
    <string name="password">密码</string>
    <string name="passwordd">姓名：</string>
    <string name="passworddd">靓女</string>
    <string name="login">登录</string>
    <string name="enroll">注册</string>
</resources>

themes.xml

<resources xmlns:tools="http://schemas.android.com/tools">
    <!-- Base application theme. -->
    <style name="Theme.Test" parent="Theme.AppCompat.Light.NoActionBar">
        <!-- Primary brand color. -->
        <item name="colorPrimary">@color/purple_500</item>
        <item name="colorPrimaryVariant">@color/purple_700</item>
        <item name="colorOnPrimary">@color/white</item>
        <!-- Secondary brand color. -->
        <item name="colorSecondary">@color/teal_200</item>
        <item name="colorSecondaryVariant">@color/teal_700</item>
        <item name="colorOnSecondary">@color/black</item>
        <!-- Status bar color. -->
        <item name="android:statusBarColor" tools:targetApi="l">?attr/colorPrimaryVariant</item>
        <!-- Customize your theme here. -->
    </style>
</resources>

圆满成功！