菜鸟学习之路1 闪屏的实现及注册和登录界面之间的切换

         实验思路：先分别实现闪屏、注册界面、登录界面的活动，再用Intent将相关的活动连接起来，实现不同活动之间的跳转。此次试验代码较多，我只列出主要代码，详细的代码可用底部的下载链接下载。

一、实验效果图：

二、主要代码：

（1）WelcomeActivity.java（这部分代码实现的是第一页的欢迎页面）

package com.example.flashscreendemo;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.view.animation.AlphaAnimation;import android.view.animation.Animation;import android.view.animation.Animation.AnimationListener;import android.view.animation.RotateAnimation;import android.widget.ImageView;import android.widget.RelativeLayout;public class WeclomeActivity extends Activity {private RelativeLayout layoutWecome;private ImageView ivMonkey;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);/* * requestWindowFeature(Window.FEATURE_NO_TITLE); //取消电量状态栏 * this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, * WindowManager.LayoutParams.FLAG_FULLSCREEN); */setContentView(R.layout.activity_weclome);layoutWecome = (RelativeLayout) findViewById(R.id.layoutWelcome);AlphaAnimation alphaAnimation = new AlphaAnimation(0.0f, 1.0f);alphaAnimation.setDuration(1000);layoutWecome.startAnimation(alphaAnimation);ivMonkey = (ImageView) findViewById(R.id.ivMonkey);RotateAnimation rotateAnimation = new RotateAnimation(0, 360);rotateAnimation.setDuration(2000);rotateAnimation.setRepeatCount(2);ivMonkey.startAnimation(rotateAnimation);rotateAnimation.setAnimationListener(new AnimationListener() {@Overridepublic void onAnimationStart(Animation animation) {}@Overridepublic void onAnimationRepeat(Animation animation) {}@Overridepublic void onAnimationEnd(Animation animation) {Intent intent = new Intent(WeclomeActivity.this,GuideActivity.class);startActivity(intent);finish();}});}}

（2）GuideActivity.java（这部分代码实现的是四个引导界面的功能）

package com.example.flashscreendemo;import java.util.ArrayList;import java.util.List;import com.example.flashscreendemo.adapter.GuideAdapter;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.support.v4.view.ViewPager;import android.support.v4.view.ViewPager.OnPageChangeListener;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.widget.ImageView;public class GuideActivity extends Activity {private ViewPager vpGuide;private ImageView ivDots[];private int[] dots_id;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_guide);initGuideViews();initDots();vpGuide.setOnPageChangeListener(new OnPageChangeListener() {@Overridepublic void onPageSelected(int position) {for (int i = 0; i < ivDots.length; i++) {if (position == i) {ivDots[i].setImageResource(R.drawable.bg_point_selected);} else {ivDots[i].setImageResource(R.drawable.bg_point_normal);}}}@Overridepublic void onPageScrolled(int position, float arg1, int arg2) {}@Overridepublic void onPageScrollStateChanged(int postion) {}});}public void jumpMain(View view) {Intent intent = new Intent(this,com.example.minitwittersimulate.LoginActivity.class);startActivity(intent);finish();}private void initDots() {dots_id = new int[] { R.id.ivDots1, R.id.ivDots2, R.id.ivDots3,R.id.ivDots4 };ivDots = new ImageView[dots_id.length];for (int i = 0; i < ivDots.length; i++) {ivDots[i] = (ImageView) findViewById(dots_id[i]);}}private void initGuideViews() {vpGuide = (ViewPager) findViewById(R.id.vpGuide);List<View> views = new ArrayList<View>();LayoutInflater layoutInflater = getLayoutInflater();View view1 = layoutInflater.inflate(R.layout.view1ofpager, null);views.add(view1);View view2 = layoutInflater.inflate(R.layout.view2ofpager, null);views.add(view2);View view3 = layoutInflater.inflate(R.layout.view3ofpager, null);views.add(view3);View view4 = layoutInflater.inflate(R.layout.view4ofpager, null);views.add(view4);GuideAdapter guideAdapter = new GuideAdapter(views);vpGuide.setAdapter(guideAdapter);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {// Inflate the menu; this adds items to the action bar if it is present.getMenuInflater().inflate(R.menu.guide, menu);return true;}}

（3）GuideAdapter.java（这部分代码实现的是数据适配的功能）

package com.example.flashscreendemo.adapter;import java.util.List;import android.support.v4.view.PagerAdapter;import android.view.View;import android.view.ViewGroup;public class GuideAdapter extends PagerAdapter {private List<View> views;public GuideAdapter(List<View> views) {super();this.views = views;}@Overridepublic int getCount() {return views.size();}@Overridepublic boolean isViewFromObject(View view, Object object) {return view == object;}@Overridepublic Object instantiateItem(ViewGroup container, int position) {container.addView(views.get(position));return views.get(position);}@Overridepublic void destroyItem(ViewGroup container, int position, Object object) {container.removeView(views.get(position));}}

（4）LoginActivity.java（这部分代码是登录界面的实现）

package com.example.minitwittersimulate;import android.app.Activity;import android.content.Intent;import android.content.SharedPreferences;import android.os.Bundle;import android.preference.PreferenceManager;import android.view.View;import android.view.View.OnClickListener;import android.widget.Button;import android.widget.CheckBox;import android.widget.EditText;import android.widget.TextView;import android.widget.Toast;import com.example.flashscreendemo.R;public class LoginActivity extends Activity {private SharedPreferences pref;private SharedPreferences.Editor editor;private EditText etUsername;private EditText etPassword;private Button btnLogin;private CheckBox cbRememberPass;private TextView tvRe;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_login);pref = PreferenceManager.getDefaultSharedPreferences(this);etUsername = (EditText) findViewById(R.id.etUsername);etPassword = (EditText) findViewById(R.id.etPassword);cbRememberPass = (CheckBox) findViewById(R.id.cbRememberPass);btnLogin = (Button) findViewById(R.id.btnLogin);tvRe = (TextView) findViewById(R.id.tvRe);boolean isRemember = pref.getBoolean("remember_password", false);if (isRemember) {// 将账号和密码都设置到文本框中String account = pref.getString("account", "");String password = pref.getString("password", "");etUsername.setText(account);etPassword.setText(password);cbRememberPass.setChecked(true);}btnLogin.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {String account = etUsername.getText().toString();String password = etPassword.getText().toString();if (account.trim().equals("")) {Toast.makeText(LoginActivity.this, "请您输入用户名！",Toast.LENGTH_SHORT).show();return;}if (password.trim().equals("")) {Toast.makeText(LoginActivity.this, "请您输入密码！",Toast.LENGTH_SHORT).show();return;}if (account.equals("admin") && password.equals("123456")) {editor = pref.edit();if (cbRememberPass.isChecked()) {// 检查复选框是否被选中editor.putBoolean("remember_password", true);editor.putString("account", account);editor.putString("password", password);}else {editor.clear();}editor.commit();Intent intent = new Intent(LoginActivity.this,MainActivity.class);startActivity(intent);finish();} else {Toast.makeText(LoginActivity.this,"account or password is invalid",Toast.LENGTH_SHORT).show();}}});tvRe.setOnClickListener(new OnClickListener() {@Overridepublic void onClick(View v) {// TODO Auto-generated method stubIntent intent = new Intent(LoginActivity.this, Register.class);startActivity(intent);finish();}});}}

（5）User.java（这部分代码实现向注册界面传入用户输入的数据）

package com.example.minitwittersimulate;public class User {private String userName;private String passWord;private char sex;private String city;private String hobby;public String getUserName() {return userName;}public void setUserName(String userName) {this.userName = userName;}public String getPassWord() {return passWord;}public void setPassWord(String passWord) {this.passWord = passWord;}public char getSex() {return sex;}public void setSex(char sex) {this.sex = sex;}public String getCity() {return city;}public void setCity(String city) {this.city = city;}public String getHobby() {return hobby;}public void setHobby(String hobby) {this.hobby = hobby;}public User(String userName, String passWord, char sex, String city,String hobby) {super();this.userName = userName;this.passWord = passWord;this.sex = sex;this.city = city;this.hobby = hobby;}@Overridepublic String toString() {// TODO Auto-generated method stubreturn this.userName + "," + this.passWord + "," + this.sex + ","+ this.city + "," + this.hobby;}}

（6）Register.java（这部分代码是注册界面的实现）

package com.example.minitwittersimulate;import com.example.flashscreendemo.R;import android.app.Activity;import android.content.Intent;import android.os.Bundle;import android.text.TextUtils;import android.view.View;import android.widget.CheckBox;import android.widget.EditText;import android.widget.RadioButton;import android.widget.Spinner;import android.widget.Toast;public class Register extends Activity {EditText etUser, etPassw, etRePassw;RadioButton rbMale, rbfaMale;CheckBox cbRead, cbTourist, cbPlayGame;Spinner spCity;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_register);init();}private void init() {// TODO Auto-generated method stubetUser = (EditText) findViewById(R.id.etUser);etPassw = (EditText) findViewById(R.id.etPassw);etRePassw = (EditText) findViewById(R.id.etRePassw);rbMale = (RadioButton) findViewById(R.id.rbMale);rbfaMale = (RadioButton) findViewById(R.id.rbfaMale);cbRead = (CheckBox) findViewById(R.id.cbRead);cbTourist = (CheckBox) findViewById(R.id.cbTourist);cbPlayGame = (CheckBox) findViewById(R.id.cbPlayGame);spCity = (Spinner) findViewById(R.id.spCity);}public void onclick(View view) {switch (view.getId()) {case R.id.btRegister:String userName = etUser.getText().toString();if (TextUtils.isEmpty(userName)) {Toast.makeText(this, "用户名不能为空", 2000).show();return;}String passW = etPassw.getText().toString();if (TextUtils.isEmpty(passW)) {etPassw.setError("密码不能为空");return;}String rePassw = etRePassw.getText().toString();if (TextUtils.isEmpty(rePassw)) {etRePassw.setError("确认密码不能为空");return;}if (!passW.equals(rePassw)) {Toast.makeText(this, "两次密码不一致", 2000).show();return;}char sex;if (rbMale.isChecked()) {sex = rbMale.getText().charAt(0);} else {sex = rbfaMale.getText().charAt(0);}StringBuffer s = new StringBuffer();if (cbRead.isChecked()) {s.append(cbRead.getText().toString() + ",");}if (cbTourist.isChecked()) {s.append(cbTourist.getText().toString() + ",");}if (cbPlayGame.isChecked()) {s.append(cbPlayGame.getText().toString() + ",");}String city = spCity.getSelectedItem().toString();User user = new User(userName, passW, sex,s.toString().equals("") ? "" : s.toString().substring(0,s.length()), city);Toast.makeText(this, "用户注册信息：" + user.toString(), 100000).show();Intent intent = new Intent(Register.this, LoginActivity.class);startActivity(intent);finish();break;case R.id.btEixt:finish();break;case R.id.btReturn:Intent intent1 = new Intent(Register.this, LoginActivity.class);startActivity(intent1);finish();break;}}}

（7）MainActivity.java（这部分代码实现的是点击“登录”按钮后跳转到的界面）

package com.example.minitwittersimulate;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import com.example.flashscreendemo.R;public class MainActivity extends Activity {@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main);}@Overridepublic boolean onCreateOptionsMenu(Menu menu) {getMenuInflater().inflate(R.menu.main, menu);return true;}}

下载链接：http://pan.baidu.com/s/1bNRFpO