Android 系统自带Activity效果

1.fullscreen Activity

布局：

显示效果：

2.SlidingMenu Activity

布局：

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

效果：

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：

Android 系统自带Activity效果_第3张图片

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");                }            }        });    }}

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