一个比较简单的夜间模式实现

　　很久没有写blog了，也不知道是怎么会事，每次想要写的时候，刚打开，就不知道写什么了，准备好的东西，也感觉没兴趣。可能还是有点懒惰吧。

想了想，blog还是要写的，不管怎样！昨天无聊，就随便写了个小例子，看看有没有用的到的，呵呵！

  1 package org.david.dayandnightdemo.cor;

  2 

  3 import android.os.Bundle;

  4 import android.app.Activity;

  5 import android.content.Context;

  6 import android.content.SharedPreferences;

  7 import android.content.SharedPreferences.Editor;

  8 import android.graphics.Color;

  9 import android.graphics.PixelFormat;

 10 import android.view.Gravity;

 11 import android.view.View;

 12 import android.view.View.OnClickListener;

 13 import android.view.WindowManager;

 14 import android.view.WindowManager.LayoutParams;

 15 import android.widget.Button;

 16 import android.widget.TextView;

 17 

 18 public class MainActivity extends Activity implements OnClickListener {

 19 

 20     private WindowManager mWindowManager;

 21     private View myView;

 22     private Button btn_dayAndnight;

 23     private SharedPreferences skinSp;

 24     private final static String DAY = "day";

 25     private final static String NIGHT = "night";

 26     private int flage = 0;

 27 

 28     @Override

 29     protected void onCreate(Bundle savedInstanceState) {

 30         super.onCreate(savedInstanceState);

 31         mWindowManager = (WindowManager) getSystemService(Context.WINDOW_SERVICE);

 32         setContentView(R.layout.activity_main);

 33         init();

 34     }

 35 

 36     private void init() {

 37         skinSp = this.getSharedPreferences("skinchange", Context.MODE_PRIVATE);

 38         btn_dayAndnight = (Button) findViewById(R.id.btn_dayAndnight);

 39         btn_dayAndnight.setOnClickListener(this);

 40         

 41         String mode = skinSp.getString("skin", "");

 42         if(mode!=null||!mode.equals("")){

 43             if(mode.equals(NIGHT)){

 44                 night();

 45             }else{

 46                 day();

 47             }

 48         }

 49         

 50     }

 51 

 52     @Override

 53     public void onClick(View v) {

 54         if(flage%2==0){

 55             night();

 56             btn_dayAndnight.setText("白天模式");

 57             btn_dayAndnight.setTextColor(Color.WHITE);

 58             flage++;

 59         }else{

 60             day();

 61             btn_dayAndnight.setText("夜间模式");

 62             btn_dayAndnight.setTextColor(Color.BLACK);

 63             flage++;

 64         }

 65     }

 66 

 67     public void night() {

 68         WindowManager.LayoutParams params = new WindowManager.LayoutParams(

 69                 LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT,

 70                 LayoutParams.TYPE_APPLICATION,

 71                 WindowManager.LayoutParams.FLAG_NOT_TOUCHABLE

 72                         | WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE,

 73                 PixelFormat.TRANSLUCENT);

 74         params.gravity=Gravity.BOTTOM;

 75         params.y=10;

 76         if(myView==null){

 77             myView=new TextView(this);

 78             myView.setBackgroundColor(0x80000000);

 79         }

 80         mWindowManager.addView(myView, params);

 81         Editor edit = skinSp.edit();

 82         edit.putString("skin", NIGHT);

 83         edit.commit();

 84     }

 85     

 86     public void day(){

 87         if(myView!=null){

 88             mWindowManager.removeView(myView);

 89             Editor edit = skinSp.edit();

 90             edit.putString("skin", DAY);

 91             edit.commit();

 92         }

 93     }

 94     

 95     

 96     public void removeSkin(){

 97         if(myView!=null){

 98             mWindowManager.removeView(myView);

 99         }

100     }

101     

102     @Override

103     protected void onDestroy() {

104         super.onDestroy();

105         String mode = skinSp.getString("skin", "");

106         if(mode.equals(NIGHT)){

107             removeSkin();            

108         }

109     }

110 

111 }

布局文件：

 1 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

 2     xmlns:tools="http://schemas.android.com/tools"

 3     android:layout_width="match_parent"

 4     android:layout_height="match_parent"

 5     android:paddingBottom="@dimen/activity_vertical_margin"

 6     android:paddingLeft="@dimen/activity_horizontal_margin"

 7     android:paddingRight="@dimen/activity_horizontal_margin"

 8     android:paddingTop="@dimen/activity_vertical_margin"

 9     tools:context=".MainActivity" >

10 

11     <Button

12         android:id="@+id/btn_dayAndnight"

13         android:layout_width="fill_parent"

14         android:layout_height="wrap_content"

15         android:text="@string/btn_changeskin" />

16 

17 </RelativeLayout>

　　共勉：时间像海绵里的水，挤一挤还总是会有的，呵呵。。。