2.仿微信--登录界面（LoginActivity）布局界面的实现

1.登录界面LoginActivity.java（具体逻辑后边实现，随便输入信息点击登陆进入主界面）

/** * 登陆页面 *  */public class LoginActivity extends Activity {    private EditText et_usertel;    private EditText et_password;    private Button btn_login;    private Button btn_qtlogin;    ProgressDialog dialog;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_login);        dialog = new ProgressDialog(LoginActivity.this);        et_usertel = (EditText) findViewById(R.id.et_usertel);        et_password = (EditText) findViewById(R.id.et_password);        btn_login = (Button) findViewById(R.id.btn_login);        btn_qtlogin = (Button) findViewById(R.id.btn_qtlogin);                // 监听多个输入框        et_usertel.addTextChangedListener(new TextChange());        et_password.addTextChangedListener(new TextChange());        btn_login.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {startActivity(new Intent(LoginActivity.this,                          MainActivity.class));            }        });        btn_qtlogin.setOnClickListener(new OnClickListener() {            @Override            public void onClick(View v) {                startActivity(new Intent(LoginActivity.this,                        RegisterActivity.class));            }        });    }    // EditText监听器    class TextChange implements TextWatcher {        @Override        public void afterTextChanged(Editable arg0) {        }        @Override        public void beforeTextChanged(CharSequence arg0, int arg1, int arg2,                int arg3) {        }        @Override        public void onTextChanged(CharSequence cs, int start, int before,                int count) {            boolean Sign2 = et_usertel.getText().length() > 0;            boolean Sign3 = et_password.getText().length() > 0;            if (Sign2 & Sign3) {                btn_login.setTextColor(0xFFFFFFFF);                btn_login.setEnabled(true);            }            // 在layout文件中，对Button的text属性应预先设置默认值，否则刚打开程序的时候Button是无显示的            else {                btn_login.setTextColor(0xFFD0EFC6);                btn_login.setEnabled(false);            }        }    }}

2.在AndroidManifest.xml中注册

<activity            android:name=".LoginActivity"            android:theme="@android:style/Theme.NoTitleBar"  />  

3.布局文件activity_login.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:background="#ffffff"    android:orientation="vertical" >    <RelativeLayout        android:id="@+id/title"        android:layout_width="match_parent"        android:layout_height="@dimen/height_top_bar"        android:background="@color/common_top_bar_blue" >        <ImageView            android:id="@+id/iv_back"            android:layout_width="40dp"            android:layout_height="match_parent"            android:layout_alignParentLeft="true"            android:layout_centerVertical="true"            android:onClick="back"            android:paddingBottom="5dp"            android:paddingLeft="5dp"            android:paddingRight="5dp"            android:paddingTop="5dp"            android:scaleType="centerInside"            android:src="@drawable/top_bar_back" />        <View            android:id="@+id/view_temp"            android:layout_width="1dp"            android:layout_height="match_parent"            android:layout_marginBottom="8dp"            android:layout_marginTop="8dp"            android:layout_toRightOf="@id/iv_back"            android:background="#14191A" />        <TextView            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_centerVertical="true"            android:layout_marginLeft="10dp"            android:layout_toRightOf="@id/view_temp"            android:text="使用手机号登录"            android:textColor="#ffffff"            android:textSize="18sp" />    </RelativeLayout>    <LinearLayout        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:orientation="vertical"        android:padding="12dp" >        <RelativeLayout            android:layout_width="match_parent"            android:layout_height="48dp" >            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_centerVertical="true"                android:layout_marginLeft="10dp"                android:text="国家和地区"                android:textColor="#353535"                android:textSize="16sp" />            <TextView                android:layout_width="wrap_content"                android:layout_height="wrap_content"                android:layout_alignParentRight="true"                android:layout_centerVertical="true"                android:layout_marginRight="10dp"                android:text="中国"                android:textColor="#45c01a"                android:textSize="16sp" />            <View                android:layout_width="match_parent"                android:layout_height="0.1dp"                android:layout_alignParentBottom="true"                android:background="#dbdbdb" />        </RelativeLayout>        <RelativeLayout            android:layout_width="match_parent"            android:layout_height="48dp" >            <EditText                android:id="@+id/et_usertel"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:layout_centerVertical="true"                android:background="@drawable/edittext_login"                android:hint="你的手机号码"                android:inputType="phone"                android:paddingLeft="90dp"                android:singleLine="true"                android:textColorHint="#DDDDDD"                android:textSize="16sp"                 android:textCursorDrawable="@null"/>            <TextView                android:layout_width="90dp"                android:layout_height="wrap_content"                android:layout_alignLeft="@id/et_usertel"                android:layout_centerVertical="true"                android:layout_marginLeft="24dp"                android:text="+86"                android:textColor="#353535"                android:textSize="16sp" />        </RelativeLayout>        <RelativeLayout            android:layout_width="match_parent"            android:layout_height="48dp" >            <EditText                android:id="@+id/et_password"                android:layout_width="match_parent"                android:layout_height="wrap_content"                android:layout_centerVertical="true"                android:background="@drawable/edittext_login"                android:hint="填写密码"                android:paddingLeft="90dp"                android:password="true"                android:singleLine="true"                android:textColorHint="#DDDDDD"                android:textSize="16sp"                android:textCursorDrawable="@null" />            <TextView                android:id="@+id/tv_password"                android:layout_width="90dp"                android:layout_height="wrap_content"                android:layout_alignLeft="@id/et_password"                android:layout_centerVertical="true"                android:layout_marginLeft="10dp"                android:text="密码"                android:textColor="#353535"                android:textSize="16sp" />        </RelativeLayout>        <Button            android:id="@+id/btn_login"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:layout_marginTop="24dp"            android:background="@drawable/btn_register_bg"            android:enabled="false"            android:paddingBottom="7dp"            android:paddingTop="7dp"            android:text="登录"            android:textColor="@android:color/white"            android:textSize="18sp" />        <TextView            android:id="@+id/tv_wenti"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:layout_gravity="right"            android:layout_marginTop="10dp"            android:text="登录遇到问题？"            android:textColor="#576B95"            android:textSize="14sp" />    </LinearLayout>    <RelativeLayout        android:layout_width="match_parent"        android:layout_height="match_parent" >        <Button            android:layout_margin="33dp"            android:padding="8dp"            android:background="@drawable/btn_qtlogin_bg"            android:id="@+id/btn_qtlogin"            android:layout_width="wrap_content"            android:layout_height="33dp"            android:layout_alignParentBottom="true"            android:layout_centerHorizontal="true"            android:layout_marginTop="10dp"            android:text="注册"            android:textColor="#353535"            android:textSize="15sp" />    </RelativeLayout></LinearLayout>

4.布局文件里涉及到的资源文件

dimens.xml文件

 <dimen name="height_top_bar">48dp</dimen>

color.xml

<color name="common_top_bar_blue">#22292c</color>

drawable目录下：

top_bar_back.xml

<selector  xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="true" android:drawable="@drawable/ac1" />    <item android:state_selected="true" android:drawable="@drawable/ac1" />    <item android:drawable="@drawable/ac0" /></selector>

edittext_login.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android" >    <item android:drawable="@drawable/wo" android:state_focused="true"/>    <item android:drawable="@drawable/wp"/>  </selector>

btn_register_bg.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/yuanjiao_3" android:state_pressed="true"/>     <item android:drawable="@drawable/yuanjiao_1" android:state_enabled="false"/>    <item android:drawable="@drawable/yuanjiao_2" android:state_enabled="true"/>    <item android:drawable="@drawable/yuanjiao_1"/></selector>

btn_qtlogin_bg.xml

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android">    <item android:drawable="@drawable/yuanjiao_4" android:state_pressed="true"/>    <item android:drawable="@drawable/yuanjiao_5"/></selector>

yuanjiao_1.xml

<?xml version="1.0" encoding="utf-8"?><selector  xmlns:android="http://schemas.android.com/apk/res/android">    <item android:state_pressed="true" android:drawable="@drawable/ac1" />    <item android:state_selected="true" android:drawable="@drawable/ac1" />    <item android:drawable="@drawable/ac0" /></selector>

yuanjiao_2.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" >    <solid android:color="#45C01A" />    <corners        android:bottomLeftRadius="1dp"        android:bottomRightRadius="1dp"        android:topLeftRadius="1dp"        android:topRightRadius="1dp" /></shape>

yuanjiao_3.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" >    <solid android:color="#027A0B" />    <corners        android:bottomLeftRadius="1dp"        android:bottomRightRadius="1dp"        android:topLeftRadius="1dp"        android:topRightRadius="1dp" /></shape>

yuanjiao_4.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" >    <solid android:color="#F1F1F1" />    <corners        android:bottomLeftRadius="1dp"        android:bottomRightRadius="1dp"        android:topLeftRadius="1dp"        android:topRightRadius="1dp" /></shape>

yuanjiao_5.xml

<?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android" >    <solid android:color="#F0F0F0" />    <corners        android:bottomLeftRadius="1dp"        android:bottomRightRadius="1dp"        android:topLeftRadius="1dp"        android:topRightRadius="1dp" /></shape>

5.最后，在SplashActivity.java中修改

在onStart()方法中修改

//进入登录页面startActivity(new Intent(SplashActivity.this,LoginActivity.class));