最近通过学习,对fragment的使用有了新的认识。
一开始接触android的时候,很是受不了这个fragment,总感觉它把一个简单的事情搞复杂啦,所以每次新建工程的时候总是固执的选择empty Activity
但是后来发现这样写出来的代码移植的时候总是要该来该去,现在开始偏爱带fragment的工程向导
向导默认生成一个JAVA文件,和两个布局文件
MainActivity.JAVA
package com.example.tesf; import android.app.Activity; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; public class MainActivity extends Activity { @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_main); if (savedInstanceState == null) { getFragmentManager().beginTransaction() .add(R.id.container, new PlaceholderFragment()) .commit(); } } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.menu.main, 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(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } /** * A placeholder fragment containing a simple view. */ public static class PlaceholderFragment extends Fragment { public PlaceholderFragment() { } @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); return rootView; } } }
布局文件:activity_main.xml
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" xmlns:tools="http://schemas.android.com/tools" android:id="@+id/container" android:layout_width="match_parent" android:layout_height="match_parent" tools:context="com.example.tesf.MainActivity" tools:ignore="MergeRootFrame" />
另外一个布局文件:fragment_main.xml 这个布局文件就可以自己发挥啦
下面演示一个登录注册的功能:
在fragment_main.xml实现登录注册的布局
<?xml version="1.0" encoding="UTF-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:background="#fff2f0eb" android:orientation="vertical" > <RelativeLayout android:layout_width="fill_parent" android:layout_height="@dimen/height_top_bar" android:layout_weight="0" android:background="@color/common_top_bar_blue" > <TextView android:id="@+id/ivTitleName" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_centerInParent="true" android:text="登录" android:textColor="#ffffffff" android:textSize="20.0sp" /> <ImageButton android:id="@+id/ivTitleBtnLeft1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:background="@drawable/top_icon_back" /> <ImageButton android:id="@+id/ivTitleBtnLeft2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginLeft="10dp" android:layout_alignParentLeft="true" android:layout_centerVertical="true" android:visibility="gone" android:background="@drawable/top_icon_menu" /> <TextView android:id="@+id/ivTextViewRigh" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_marginRight="10dp" android:layout_alignParentRight="true" android:layout_centerVertical="true" android:textColor="#ffffffff" android:textSize="16.0sp" android:text="忘记密码" android:clickable="true" /> </RelativeLayout> <ViewFlipper android:id="@+id/mainFlipper" android:layout_width="fill_parent" android:layout_height="0dp" android:layout_weight="1" > <LinearLayout android:id="@+id/content1" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_horizontal" android:background="@color/login_background" android:orientation="vertical" > <LinearLayout android:layout_margin="10dp" android:padding="8dp" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/white" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:orientation="horizontal" android:background="@drawable/inputbox_bg"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:src="@drawable/input_phone" /> <EditText android:id="@+id/login_number" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="6" android:inputType="phone" android:background="@null" android:textSize="15.0sp" android:hint="手机号"> <requestFocus /> </EditText> </LinearLayout> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:orientation="horizontal" android:layout_marginTop="15dp" android:background="@drawable/inputbox_bg"> <ImageView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:src="@drawable/input_key" /> <EditText android:id="@+id/login_passward" android:layout_width="wrap_content" android:layout_height="wrap_content" android:inputType="textPassword" android:layout_weight="6" android:background="@null" android:textSize="15.0sp" android:hint="密码"/> </LinearLayout> </LinearLayout> <Button android:id="@+id/loadBtn" style="@style/style_common_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp" android:background="@drawable/selector_common_btn" android:text="登录" /> <TextView android:id="@+id/regster_text" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_margin="8dp" android:clickable="true" android:textColor="@color/common_top_bar_blue" android:text="立即注册" /> </LinearLayout> <LinearLayout android:id="@+id/content2" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_horizontal" android:background="@color/login_background" android:orientation="vertical" > <LinearLayout android:id="@+id/content2" android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_horizontal" android:background="@color/login_background" android:orientation="vertical" > <LinearLayout android:layout_margin="10dp" android:padding="8dp" android:layout_width="match_parent" android:layout_height="wrap_content" android:background="@color/white" android:orientation="vertical" > <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:orientation="horizontal" android:background="@drawable/inputbox_bg"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:textColor="@color/common_top_bar_blue" android:text="手机号" /> <EditText android:id="@+id/register_number" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="6" android:inputType="phone" android:background="@null" android:textSize="15.0sp" android:hint="请输入手机号作为用户名"> <requestFocus /> </EditText> </LinearLayout> <ImageView android:layout_margin="10dp" android:layout_width="match_parent" android:layout_height="1dp" android:background="@color/login_background" /> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:orientation="horizontal" android:background="@drawable/inputbox_bg"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:textColor="@color/common_top_bar_blue" android:text="设置密码" /> <EditText android:id="@+id/register_passward" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="6" android:inputType="textPassword" android:background="@null" android:textSize="15.0sp" android:hint="请输入至少6位密码"/> </LinearLayout> <ImageView android:layout_margin="10dp" android:layout_width="match_parent" android:layout_height="1dp" android:background="@color/login_background" /> <LinearLayout android:layout_width="match_parent" android:layout_height="match_parent" android:gravity="center_vertical" android:orientation="horizontal" android:background="@drawable/inputbox_bg"> <TextView android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="1" android:textColor="@color/common_top_bar_blue" android:text="验证码" /> <EditText android:id="@+id/register_code" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="2" android:inputType="number" android:background="@null" android:textSize="15.0sp" android:textColor="@color/login_background" android:text="0"/> <Button android:id="@+id/get_code" style="@style/style_common_btn" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_weight="2" android:layout_margin="5dp" android:background="@drawable/selector_common_btn" android:text="获取验证码" /> </LinearLayout> </LinearLayout> <Button android:id="@+id/confirm_button" style="@style/style_common_btn" android:layout_width="match_parent" android:layout_height="wrap_content" android:layout_margin="10dp" android:background="@drawable/selector_common_btn2" android:text="确定" /> </LinearLayout> </LinearLayout> </ViewFlipper> </LinearLayout>
新建一个类实现登录注册的逻辑
package com.example.tesf; import android.app.Fragment; import android.os.Bundle; import android.view.LayoutInflater; import android.view.View; import android.view.ViewGroup; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText; import android.widget.ImageButton; import android.widget.TextView; import android.widget.ViewFlipper; public class RegiserLogin extends Fragment{ private ImageButton ib_back; private ImageButton ib_menu; private TextView regster_text;// private TextView ivTitleName; private TextView ivTextViewRigh; private ViewFlipper vf; private Button confirm_button; private Button load_btn; private EditText login_number; private EditText login_passward; private EditText register_number; private EditText register_passward; private EditText register_code; @Override public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { View rootView = inflater.inflate(R.layout.fragment_main, container, false); initView(rootView); return rootView; } private void initView(View view){ vf = (ViewFlipper) view.findViewById(R.id.mainFlipper); ib_menu = (ImageButton) view.findViewById(R.id.ivTitleBtnLeft2); ib_back = (ImageButton) view.findViewById(R.id.ivTitleBtnLeft1); regster_text = (TextView) view.findViewById(R.id.regster_text); ivTitleName = (TextView) view.findViewById(R.id.ivTitleName); confirm_button = (Button) view.findViewById(R.id.confirm_button); load_btn = (Button) view.findViewById(R.id.loadBtn); login_number = (EditText) view.findViewById(R.id.login_number); login_passward = (EditText) view.findViewById(R.id.login_passward); register_number = (EditText) view.findViewById(R.id.register_number); register_passward = (EditText) view.findViewById(R.id.register_passward); register_code = (EditText) view.findViewById(R.id.register_code); ib_back.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { // finish(); } }); regster_text.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ib_menu.setVisibility(View.VISIBLE); ivTitleName.setText("注册新账号"); vf.showNext(); ib_back.setVisibility(View.GONE); } }); ib_menu.setOnClickListener(new OnClickListener() { @Override public void onClick(View v) { ib_back.setVisibility(View.VISIBLE); ivTitleName.setText("登录"); vf.showPrevious(); ib_menu.setVisibility(View.GONE); } }); } }
实现登录注册功能只需要在向导生成的MainActivity里稍加改动就行
if (savedInstanceState == null) { getFragmentManager().beginTransaction() .add(R.id.container, new RegiserLogin()) .commit(); }
其实在学习Android的过程中都可以仿照这种模式,在向导生成代码的基础上,自己创建extends Fragment的类,再建一个该类需要用的布局文件。
这样所有的demo都可以在一个工程下完成啦。
时间: 2024-11-08 22:31:33