学习进度条

今日所花时间：一小时
今日代码量：100行
博客量：一篇
了解到的知识点：深入学习androidStudio
创建一个项目
其中res下的value文件夹中的strings.xml中代码可以书写一些常用的字符串
例子：

<resources>
    <string name="app_name">demo1</string>
    <string name="hello">hello world</string>
</resources>

可以在activity_main.xml中调用

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout 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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
//调用
        android:text="@string/hello"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />

</androidx.constraintlayout.widget.ConstraintLayout>

以下文件是一个启动文件在哪个activity文件下那哪个文件就是启动的activity

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

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

LinearLayout

<!--LinearLayout是线性布局-->
<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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal"
    tools:context=".MainActivity">

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="@string/hello"
        android:textColor="@color/black"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent" />


</LinearLayout>

按照以上代码设置宽度

android:padding="10dp"

设置图片为背景

android:background="@drawable/ic_launcher_background"

RelativeLayout

<!--RelativeLayout是相对布局-->

要设置类似以下内容(指明位置情况，指明布局)

android:layout_below="@id/tv_1"

登录操作
MainActivity

package com.example.demo1;

import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;

import com.example.demo1.FunctionActivity;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class MainActivity extends AppCompatActivity {
    //声明控件
    private Button mBtnLogin;
    private EditText mEtUser;
    private EditText mEtPassword;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_main);
        //找到控件
        mBtnLogin = findViewById(R.id.btn_login);
        mEtUser = findViewById(R.id.et_1);
        mEtPassword = findViewById(R.id.et_2);
        //实现直接跳转——————法一
//        mBtnLogin.setOnClickListener(new View.OnClickListener() {
//            @Override
//            public void onClick(View v) {
//                Intent intent = null;
//                intent = new Intent(MainActivity.this,FunctionActivity.class);
//                startActivity(intent);
//            }
//        });
        //匹配对应的用户名和秘密才能进行跳转操作
        mBtnLogin.setOnClickListener(this::onclick);

        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
            return insets;
        });
    }

    private void onclick(View v){
        //需要获取输入的用户名和密码
        String username = mEtUser.getText().toString();
        String password = mEtPassword.getText().toString();
        Intent intent = null;
        //假设正确的账号和密码分别是hyn 123456
        if (username.equals("hyn")&& password.equals("123456")){
            //如果正确的话进行跳转
            intent = new Intent(MainActivity.this,FunctionActivity.class);
            startActivity(intent);
        }else{
            //不正确,弹出登录失败toast

        }
    }
}

FunctionActivity

package com.example.demo1;

import android.os.Bundle;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;
import androidx.core.graphics.Insets;
import androidx.core.view.ViewCompat;
import androidx.core.view.WindowInsetsCompat;

public class FunctionActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_function);
        ViewCompat.setOnApplyWindowInsetsListener(findViewById(R.id.main), (v, insets) -> {
            Insets systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars());
            v.setPadding(systemBars.left, systemBars.top, systemBars.right, systemBars.bottom);
            return insets;
        });
    }
}

activity_function.xml

<?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp"
    tools:context=".FunctionActivity">

    <TextView
        android:id="@+id/tv_func_1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:text="跳转后界面"
        android:textSize="25dp"
        android:layout_gravity="center"
        android:textColor="@color/black"
        />

</LinearLayout>

activity_main.xml

<?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:id="@+id/main"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical"
    android:padding="10dp"
    android:background="@color/cardview_light_background"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/tv_1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:ellipsize="end"
        android:maxEms="2"
        android:maxLines="1"
        android:text="@string/hyn"
        android:textColor="#00838F"
        android:textSize="18sp"
        android:gravity="center"/>

<!--    <TextView-->
<!--        android:id="@+id/tv_2"-->
<!--        android:layout_width="100dp"-->
<!--        android:layout_height="wrap_content"-->
<!--        android:text="Hello World!"-->
<!--        android:textColor="#d21015"-->
<!--        android:textSize="20sp"-->
<!--        android:maxEms="10"-->
<!--        android:maxLines="2"-->
<!--        android:ellipsize="end"-->
<!--        />-->
    <EditText
        android:id="@+id/et_1"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:textSize="16sp"
        android:textColor="@android:color/black"
        android:hint="用户名"
        android:maxLines="1"
        android:padding="5dp"
        android:layout_marginTop="10dp"
        />
    <EditText
        android:id="@+id/et_2"
        android:layout_width="match_parent"
        android:layout_height="50dp"
        android:textSize="16sp"
        android:textColor="@android:color/black"
        android:hint="密码"
        android:maxLines="1"
        android:padding="5dp"
        android:layout_marginTop="5dp"
        android:inputType="textPassword"
        android:background="@drawable/bg_username"
        />
    <LinearLayout
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:orientation="horizontal"
        android:layout_marginTop="20dp"

        >
    <Button
        android:id="@+id/btn_login"
        android:layout_width="0dp"
        android:layout_weight="1"
        android:layout_height="wrap_content"
        android:text="登录"
        android:layout_gravity="center"
        android:background="@drawable/btn_left"
        />
        <Button
            android:layout_width="0dp"
            android:layout_weight="1"
            android:layout_height="wrap_content"
            android:text="注册"
            android:layout_marginLeft="2dp"
            android:background="@drawable/btn_right"
            />
    </LinearLayout>

</LinearLayout>

Toast弹窗

if (username.equals("hyn")&& password.equals("123456")){
            //toast普通版
            Toast.makeText(getApplicationContext(),ok,Toast.LENGTH_SHORT).show();
            //如果正确的话进行跳转
            intent = new Intent(MainActivity.this,FunctionActivity.class);
            startActivity(intent);
        }else{
            //不正确,弹出登录失败toast
//            提升版，居中显示
            Toast toastCenter = Toast.makeText(getApplicationContext(),fail,Toast.LENGTH_SHORT);
            toastCenter.setGravity(Gravity.CENTER,0,0);
            toastCenter.show();

        }

Toast封装

package com.example.demo1.util;

import android.content.Context;
import android.widget.Toast;

public class ToastUtil {
    public static Toast mToast;
    public static void showMsg(Context context, String msg){
        if(mToast == null){
            mToast = Toast.makeText(context,msg,Toast.LENGTH_SHORT);
        }else{
            mToast.setText(msg);
        }
        mToast.show();
    }
}

实现侧滑

1.讲解对应的java文件如何实现

2.涉及到Menu也就是两个布局文件的转换的java代码

3.讲解一个漂亮的跳转写法**

1.setlistener--setOnClickListerner
2.Onclick-intent(通过的是getD-对应不同的intent)**不要忘了最后的startactivity
3.onCreate里面要网用我们的setListener

package com.example.demo1;

import android.annotation.SuppressLint;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.ImageView;

import androidx.activity.EdgeToEdge;
import androidx.appcompat.app.AppCompatActivity;

public class SlideActivity extends AppCompatActivity {
    // 声明控件
    private ImageView mIvHead;
    private SlideMenu slideMenu;
    private Button mBtnStudy;
    private Button mBtnPlay;
    private Button mBtnExercise;
    private Button mBtnRead;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        EdgeToEdge.enable(this);
        setContentView(R.layout.activity_slide);

        // 找到控件
        mIvHead = findViewById(R.id.iv_head);
        slideMenu = findViewById(R.id.slideMenu);
        mBtnStudy = findViewById(R.id.btn_main_1);
        mBtnPlay = findViewById(R.id.btn_main_2);
        mBtnExercise = findViewById(R.id.btn_main_3);
        mBtnRead = findViewById(R.id.btn_main_4);

        // 实现侧滑的部分,点击加侧滑
        mIvHead.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                slideMenu.switchMenu();
            }
        });
        setListener();
    }

    private void setListener() {
        OnClick onClick = new OnClick();
        // 对每一个按钮进行监听
        mBtnStudy.setOnClickListener(onClick);
        mBtnPlay.setOnClickListener(onClick);
        mBtnExercise.setOnClickListener(onClick);
        mBtnRead.setOnClickListener(onClick);
    }

    private class OnClick implements View.OnClickListener {
        @Override
        public void onClick(View v) {
            Intent intent = null;
            int id = v.getId();

            if (id == R.id.btn_main_1) {
                intent = new Intent(SlideActivity.this, StudyActivity.class);
            } else if (id == R.id.btn_main_2) {
                intent = new Intent(SlideActivity.this, PlayActivity.class);
            } else if (id == R.id.btn_main_3) {
                intent = new Intent(SlideActivity.this, ExerciseActivity.class);
            } else if (id == R.id.btn_main_4) {
                intent = new Intent(SlideActivity.this, ReadActivity.class);
            }

            if (intent != null) {
                startActivity(intent);
            }
        }
    }
}

SlideMenu

package com.example.demo1;

import android.content.Context;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.view.View;
import android.widget.FrameLayout;
import android.widget.Scroller;

public class SlideMenu extends FrameLayout {
    private View menuView,mainView;
    private int menuWidth;
    private Scroller scroller;
    public SlideMenu(Context context) {
        super(context);
        init();
    }
    public SlideMenu(Context context, AttributeSet attrs) {
        super(context, attrs);
        init();
    }
    private void init(){
        scroller = new Scroller(getContext());
    }
    /**
     * 当1级子view全部加载完调用，可以用初始化子view引用
     * 注意这里无法获取子view的宽高
     */
    @Override
    protected void onFinishInflate() {
        super.onFinishInflate();
        menuView = getChildAt(0);
        mainView = getChildAt(1);
        menuWidth = menuView.getLayoutParams().width;
    }
    //使Menu也具有滑动功能
    public boolean onInterceptTouchEvent(MotionEvent ev){
        switch (ev.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) ev.getX();
                break;
            case MotionEvent.ACTION_MOVE:
                int deltaX = (int) (ev.getX() - downX);
                if (Math.abs(deltaX) > 8){
                    return true;
                }
                break;
        }
        return super.onInterceptTouchEvent(ev);
    }

    /**
     * s设置两个子view在页面上的布局
     * @param l:当前子view的左边在父view的坐标系的x坐标
     * @param t:当前子view的顶边在父view的坐标系的y坐标
     * @param r:当前子view的宽
     * @param b:当前子view的高
     */
    @Override
    protected void onLayout(boolean changed, int l, int t, int r, int b) {
        menuView.layout(-menuWidth, 0, 0, b);
        mainView.layout(0, 0, r, b);
    }

    /**
     * 处理屏幕滑动事件
     */
    private int downX;
    public boolean onTouchEvent(MotionEvent event) {
        switch (event.getAction()) {
            case MotionEvent.ACTION_DOWN:
                downX = (int) event.getX();
                break;
            case MotionEvent.ACTION_MOVE:
                int moveX = (int) event.getX();
                int deltaX = moveX - downX;
                int newScrollX = getScrollX() - deltaX;
                if (newScrollX < -menuWidth) newScrollX = -menuWidth;
                if (newScrollX > 0) newScrollX = 0;
                scrollTo(newScrollX, 0);
                downX = moveX;
                break;
            case MotionEvent.ACTION_UP:
                //当滑动距离小于Menu宽度的一半时，平滑滑动到主页面
                if(getScrollX()>-menuWidth/2){
                    closeMenu();
                }else {
                    //当滑动距离大于Menu宽度的一半时，平滑滑动到Menu页面
                    openMenu();
                }
                break;
        }
        return true;
    }
    //关闭menu
    private void closeMenu(){
        scroller.startScroll(getScrollX(),0,0-getScrollX(),0,400);
        invalidate();
    }
    //打开menu
    private void openMenu(){
        scroller.startScroll(getScrollX(),0,-menuWidth-getScrollX(),0,400);
        invalidate();
    }
    /**
     * Scroller不主动去调用这个方法
     * 而invalidate()可以调用这个方法
     * invalidate->draw->computeScroll
     */
    public void computeScroll(){
        super.computeScroll();
        if(scroller.computeScrollOffset()){
            //返回true,表示动画没结束
            scrollTo(scroller.getCurrX(),0);
            invalidate();
        }
    }
    /**
     * 切换菜单的开和关
     */
    public void switchMenu(){
        if(getScrollX()==0){
            openMenu();
        }else {
            closeMenu();
        }
    }

}

activity_slide.xml

<?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:orientation="vertical"
    android:padding="10dp"
    tools:context=".SlideActivity">

    <com.example.demo1.SlideMenu
        android:id="@+id/slideMenu"
        android:layout_width="match_parent"
        android:layout_height="wrap_content">

        <!--    菜单界面的布局-->
        <include layout="@layout/layout_menu" />
        <!--主界面的布局-->
        <include layout="@layout/layout_main" />

    </com.example.demo1.SlideMenu>

</LinearLayout>

layout_main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:background="@color/design_default_color_background"
    android:layout_height="match_parent">

    <!-- 第一个水平的 LinearLayout -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_marginTop="10dp"

        android:orientation="horizontal">

        <ImageView
            android:id="@+id/iv_head"
            android:layout_width="60dp"
            android:layout_height="60dp"
            android:src="@android:color/black"
            android:layout_marginLeft="10dp"
            android:scaleType="centerCrop" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:text="hyn"
            android:textColor="@color/blue"
            android:textSize="22dp" />

    </LinearLayout>

    <!-- 第二个垂直的 LinearLayout -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="15dp"
        android:orientation="vertical"
        android:layout_marginTop="360dp">

        <Button
            android:id="@+id/btn_main_1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="学习"
            android:textColor="@color/white" />
        <Button
            android:id="@+id/btn_main_2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="玩耍"
            android:textColor="@color/white" />
        <Button
            android:id="@+id/btn_main_3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="锻炼"
            android:textColor="@color/white" />
        <Button
            android:id="@+id/btn_main_4"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="看书"
            android:textColor="@color/white" />
    </LinearLayout>

</LinearLayout>

layout_menu.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="match_parent"
    android:background="@color/design_default_color_background"
    android:layout_height="match_parent">

    <!-- 第一个水平的 LinearLayout -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="60dp"
        android:layout_marginTop="10dp"

        android:orientation="horizontal">

        <ImageView
            android:id="@+id/iv_head"
            android:layout_width="60dp"
            android:layout_height="60dp"
            android:src="@android:color/black"
            android:layout_marginLeft="10dp"
            android:scaleType="centerCrop" />

        <TextView
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_marginLeft="20dp"
            android:text="hyn"
            android:textColor="@color/blue"
            android:textSize="22dp" />

    </LinearLayout>

    <!-- 第二个垂直的 LinearLayout -->
    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:padding="15dp"
        android:orientation="vertical"
        android:layout_marginTop="360dp">

        <Button
            android:id="@+id/btn_main_1"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="学习"
            android:textColor="@color/white" />
        <Button
            android:id="@+id/btn_main_2"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="玩耍"
            android:textColor="@color/white" />
        <Button
            android:id="@+id/btn_main_3"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="锻炼"
            android:textColor="@color/white" />
        <Button
            android:id="@+id/btn_main_4"
            android:layout_width="match_parent"
            android:layout_height="wrap_content"
            android:text="看书"
            android:textColor="@color/white" />
    </LinearLayout>

</LinearLayout>