Andriod Studio学习笔记第六天

一、抽屉组件设计

1.主界面设计

—LinearLayout主界面布局
—NavigationLayout抽屉组件
——head.XML头部组件
——Menu_main.XML菜单项

<?xml version="1.0" encoding="utf-8"?>
<android.support.v4.widget.DrawerLayout 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="#fffff0"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:gravity="center"
                android:orientation="horizontal">

        <TextView
            android:textSize="56dp"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="主界面"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintLeft_toLeftOf="parent"
            app:layout_constraintRight_toRightOf="parent"
            app:layout_constraintTop_toTopOf="parent" />

    </LinearLayout>

    <android.support.design.widget.NavigationView
        android:id="@+id/navi"
        android:layout_width="wrap_content"
        android:layout_height="match_parent"
        android:layout_gravity="left"
        app:headerLayout="@layout/head"
        app:menu="@menu/menu_main" />

</android.support.v4.widget.DrawerLayout>

2.后台代码

package com.example.wxt.navigationview;

import android.support.annotation.NonNull;
import android.support.design.widget.NavigationView;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.MenuItem;
import android.view.View;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    NavigationView navigationView;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        navigationView=findViewById(R.id.navi);
        navigationView.setItemIconTintList(null);
        View view1 = navigationView.getHeaderView(0);
        ImageView imageView=view1.findViewById(R.id.imageView);//通过view-Imageview调用头部组件
        imageView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this,"您选择的是头部组件",Toast.LENGTH_LONG).show();
            }
        });
        final TextView textView = view1.findViewById(R.id.textView2);
        navigationView.setNavigationItemSelectedListener(new NavigationView.OnNavigationItemSelectedListener() {
            @Override
            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
                textView.setText("您选择的是："+item.getTitle().toString());
                return true;
            }
        });
    }
}

3.菜单设计

<?xml version="1.0" encoding="utf-8"?>
<menu xmlns:android="http://schemas.android.com/apk/res/android">
    <item
        android:id="@+id/item1"
        android:title="收藏"
        android:icon="@mipmap/ic_launcher"></item>
    <item
        android:id="@+id/item2"
        android:title="钱包"
        android:icon="@mipmap/ic_launcher"></item>
    <item
        android:id="@+id/item3"
        android:title="相册"
        android:icon="@mipmap/ic_launcher"></item>
    <item
        android:id="@+id/item4"
        android:title="文件"
        android:icon="@mipmap/ic_launcher"></item>
</menu>

4.头部设计

<?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"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:gravity="center"
    android:orientation="vertical">

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        app:srcCompat="@mipmap/ic_launcher" />

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />

    <TextView
        android:id="@+id/textView2"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="TextView" />
</LinearLayout>

5.效果图

二、增强文本输入

<?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:gravity="center"
    android:orientation="vertical"
    tools:context=".MainActivity">

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:gravity="center"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/textView"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="TextView" />

        <EditText
            android:id="@+id/editText"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:ems="10"
            android:hint="请输入用户名"
            android:inputType="textPersonName" />
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="100dp"
        android:gravity="center"
        android:orientation="horizontal">

        <TextView
            android:id="@+id/textView2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:text="TextView" />

        <android.support.design.widget.TextInputLayout
            android:id="@+id/textinputlayout1"
            android:layout_width="match_parent"
            android:layout_height="match_parent"
            app:counterMaxLength="10">

            <android.support.design.widget.TextInputEditText
                android:id="@+id/textinputedit1"
                android:layout_width="match_parent"
                android:layout_height="wrap_content"
                android:hint="请输入密码" />
        </android.support.design.widget.TextInputLayout>
    </LinearLayout>

    <LinearLayout
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:orientation="horizontal">

        <Button
            android:id="@+id/button"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="确认" />

        <Button
            android:id="@+id/button2"
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:layout_weight="1"
            android:text="取消" />
    </LinearLayout>
</LinearLayout>

package com.example.wxt.textinputlayout;

import android.support.design.widget.TextInputEditText;
import android.support.design.widget.TextInputLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;

public class MainActivity extends AppCompatActivity {
    TextInputEditText textInputEditText;
    TextInputLayout textInputLayout;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        textInputEditText = findViewById(R.id.textinputedit1);
        textInputLayout = findViewById(R.id.textinputlayout1);
        check();

    }

    private void check(){
        textInputEditText.addTextChangedListener(new TextWatcher() {
            @Override
            public void beforeTextChanged(CharSequence s, int start, int count, int after) {

            }

            @Override
            public void onTextChanged(CharSequence s, int start, int before, int count) {

            }

            @Override
            public void afterTextChanged(Editable s) {
                if(textInputEditText.getText().toString().length()>textInputLayout.getCounterMaxLength()||
                        textInputEditText.getText().toString().length()<6){
                    textInputLayout.setError("密码长度为：6-10位");
                }
                else{
                    textInputLayout.setError("");
                }



            }
        });
    }
}

三、Floatingactionbutton和Snacker

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MainActivity">

    <ImageView

        android:id="@+id/imageView"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:scaleType="fitXY"
        app:srcCompat="@drawable/ic_launcher_background" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floatingActionButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginEnd="44dp"
        android:layout_marginBottom="24dp"
        android:clickable="true"
        app:backgroundTint="@color/colorPrimary"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintEnd_toEndOf="parent"
        app:srcCompat="@android:drawable/btn_dialog" />
</android.support.constraint.ConstraintLayout>

package com.example.wxt.floatingactionbutton;

import android.graphics.Color;
import android.support.design.widget.FloatingActionButton;
import android.support.design.widget.Snackbar;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    FloatingActionButton floatingActionButton;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        floatingActionButton=findViewById(R.id.floatingActionButton);
        floatingActionButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Snackbar.make(v,"Snacker显示信息",Snackbar.LENGTH_LONG)
                        .setAction("确定", new View.OnClickListener() {
                            @Override
                            public void onClick(View v) {
                                Toast.makeText(MainActivity.this,"您单击了确定",Toast.LENGTH_LONG).show();
                            }
                        })
                        .setActionTextColor(Color.GREEN)
                        .show();
            }
        });
    }
}