Android 开发笔记___switch__开关

default switch

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:padding="10dp" >

     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal"
         android:paddingTop="10dp" >

         <TextView
             android:layout_width="0dp"
             android:layout_height="match_parent"
             android:layout_weight="1"
             android:gravity="left|center_vertical"
             android:text="Switch开关："
             android:textColor="#000000"
             android:textSize="17sp" />

         <LinearLayout
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_gravity="right"
             android:layout_weight="1"
             android:orientation="vertical" >

             <Switch
                 android:id="@+id/sw_status"
                 android:layout_width="100dp"
                 android:layout_height="50dp" />
         </LinearLayout>
     </LinearLayout>

     <TextView
         android:id="@+id/tv_result"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="10dp"
         android:gravity="left"
         android:textColor="#000000"
         android:textSize="17sp" />

 </LinearLayout>

 package com.example.alimjan.hello_world;

 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.widget.CompoundButton;
 import android.widget.Switch;
 import android.widget.TextView;

 /**
  * Created by alimjan on 7/2/2017.
  */

 public class class_3_2_2 extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {

     private Switch sw_status;
     private TextView tv_result;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.code_3_2_2);
         sw_status = (Switch) findViewById(R.id.sw_status);
         tv_result = (TextView) findViewById(R.id.tv_result);
         sw_status.setOnCheckedChangeListener(this);
         refreshResult();
     }

     private void refreshResult() {
         String result = String.format("Switch按钮的状态是%s",
                 (sw_status.isChecked())?"开":"关");
         tv_result.setText(result);
     }

     @Override
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
         refreshResult();
     }

     public static void startHome(Context mContext) {
         Intent intent = new Intent(mContext, class_3_2_2.class);
         mContext.startActivity(intent);
     }
 }

仿IOS风格

 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
     android:orientation="vertical"
     android:padding="10dp" >

     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:orientation="horizontal"
         android:paddingTop="10dp" >

         <TextView
             android:layout_width="0dp"
             android:layout_height="match_parent"
             android:layout_weight="1"
             android:gravity="left|center_vertical"
             android:text="仿iOS的开关："
             android:textColor="#000000"
             android:textSize="17sp" />

         <LinearLayout
             android:layout_width="0dp"
             android:layout_height="wrap_content"
             android:layout_gravity="right"
             android:layout_weight="1"
             android:orientation="vertical" >

             <CheckBox
                 android:id="@+id/ck_status"
                 android:layout_width="100dp"
                 android:layout_height="50dp"
                 android:background="@drawable/switch_selector"
                 android:button="@null" />
         </LinearLayout>
     </LinearLayout>

     <TextView
         android:id="@+id/tv_result"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:paddingTop="10dp"
         android:gravity="left"
         android:textColor="#000000"
         android:textSize="17sp" />

 </LinearLayout>

style

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

java

 package com.example.alimjan.hello_world;

 import android.content.Context;
 import android.content.Intent;
 import android.os.Bundle;
 import android.support.v7.app.AppCompatActivity;
 import android.widget.CheckBox;
 import android.widget.CompoundButton;
 import android.widget.TextView;

 /**
  * Created by alimjan on 7/2/2017.
  */

 public class class_3_2_2_2 extends AppCompatActivity implements CompoundButton.OnCheckedChangeListener {

     private CheckBox ck_status;
     private TextView tv_result;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         setContentView(R.layout.code_3_2_2_2);
         ck_status = (CheckBox) findViewById(R.id.ck_status);
         tv_result = (TextView) findViewById(R.id.tv_result);
         ck_status.setOnCheckedChangeListener(this);
         refreshResult();
     }

     private void refreshResult() {
         String result = String.format("仿iOS开关的状态是%s",
                 (ck_status.isChecked())?"开":"关");
         tv_result.setText(result);
     }

     @Override
     public void onCheckedChanged(CompoundButton buttonView, boolean isChecked) {
         refreshResult();
     }

     public static void startHome(Context mContext) {
         Intent intent = new Intent(mContext, class_3_2_2_2.class);
         mContext.startActivity(intent);
     }
 }