Android 系统自带Activity效果

以你之姓@ 2022-09-25 00:26 195阅读 0赞

**1.fullscreen Activity**

**布局：**

**显示效果：**

**![Center][]**

**2.SlidingMenu Activity**

**布局：**

<?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:id="@+id/drawer_layout"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:fitsSystemWindows="true"
        tools:openDrawer="start">
    
        <include
            layout="@layout/app_bar_drawer"
            android:layout_width="match_parent"
            android:layout_height="match_parent" />
    
        <android.support.design.widget.NavigationView
            android:id="@+id/nav_view"
            android:layout_width="wrap_content"
            android:layout_height="match_parent"
            android:layout_gravity="start"
            android:fitsSystemWindows="true"
            app:headerLayout="@layout/nav_header_drawer"
            app:menu="@menu/activity_drawer_drawer" />
    
    </android.support.v4.widget.DrawerLayout>

**效果：**

**![Center 1][]**

**代码：**

package com.example.administrator.jreduch05.adapter;
    
    import android.os.Bundle;
    import android.support.design.widget.FloatingActionButton;
    import android.support.design.widget.NavigationView;
    import android.support.design.widget.Snackbar;
    import android.support.v4.view.GravityCompat;
    import android.support.v4.widget.DrawerLayout;
    import android.support.v7.app.ActionBarDrawerToggle;
    import android.support.v7.app.AppCompatActivity;
    import android.support.v7.widget.Toolbar;
    import android.view.Menu;
    import android.view.MenuItem;
    import android.view.View;
    
    import com.example.administrator.jreduch05.R;
    
    public class DrawerActivity extends AppCompatActivity
            implements NavigationView.OnNavigationItemSelectedListener {
    
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_drawer);
            Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
            setSupportActionBar(toolbar);
    
            FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
            fab.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                            .setAction("Action", null).show();
                }
            });
    
            DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
            ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
                    this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
            drawer.setDrawerListener(toggle);
            toggle.syncState();
    
            NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
            navigationView.setNavigationItemSelectedListener(this);
        }
    
        @Override
        public void onBackPressed() {
            DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
            if (drawer.isDrawerOpen(GravityCompat.START)) {
                drawer.closeDrawer(GravityCompat.START);
            } else {
                super.onBackPressed();
            }
        }
    
        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.drawer, menu);
            return true;
        }
    
        @Override
        public boolean onOptionsItemSelected(MenuItem item) {
            // Handle action bar item clicks here. The action bar will
            // automatically handle clicks on the Home/Up button, so long
            // as you specify a parent activity in AndroidManifest.xml.
            int id = item.getItemId();
    
            //noinspection SimplifiableIfStatement
            if (id == R.id.action_settings) {
                return true;
            }
    
            return super.onOptionsItemSelected(item);
        }
    
        @SuppressWarnings("StatementWithEmptyBody")
        @Override
        public boolean onNavigationItemSelected(MenuItem item) {
            // Handle navigation view item clicks here.
            int id = item.getItemId();
    
            if (id == R.id.nav_camera) {
                // Handle the camera action
            } else if (id == R.id.nav_gallery) {
    
            } else if (id == R.id.nav_slideshow) {
    
            } else if (id == R.id.nav_manage) {
    
            } else if (id == R.id.nav_share) {
    
            } else if (id == R.id.nav_send) {
    
            }
    
            DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
            drawer.closeDrawer(GravityCompat.START);
            return true;
        }
    }

**3.Login Activity**

**布局：（将英文改成汉字）**

**效果：**

![Center 2][]

**代码：（如果密码和用户名为空，则提示）**

package com.example.administrator.jreduch05;
    
    import android.support.v7.app.AppCompatActivity;
    import android.os.Bundle;
    import android.text.TextUtils;
    import android.view.View;
    import android.widget.Button;
    import android.widget.EditText;
    
    public class MyLoginActivity extends AppCompatActivity {
        private Button bt1;
        private EditText user;
        private EditText pwd;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_my_login);
            bt1=(Button) findViewById(R.id.bt1);
            user=(EditText) findViewById(R.id.user);
            pwd=(EditText) findViewById(R.id.pwd);
            bt1.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if(TextUtils.isEmpty(user.getText().toString())){
                        user.setError("请输入正确用户名");
                    }else if(TextUtils.isEmpty(pwd.getText().toString())){
                        pwd.setError("请输入正确密码");
                    }
                }
            });
        }
    }

[Center]: /images/20220719/f7a2a3630eec4b0cb508a3068f5cded7.png
[Center 1]: /images/20220719/314da9ed8da94094964d5e6261b88d0e.png
[Center 2]: /images/20220719/627bf1b3a56a43e880a3c0eb85532abf.png