android沉浸式状态栏的实现

 <style name="Theme.Timetodo" parent="@android:style/Theme.Holo.Light"> 
  
  <!-- translucent system bars --> 
  <item name="android:windowTranslucentStatus">true</item> 
  <item name="android:windowTranslucentNavigation">true</item> 
  </style> 

 package com.example.androidedemo;  
  
 import java.lang.reflect.Field;  
  
 import android.annotation.SuppressLint;  
 import android.app.ActionBar;  
 import android.app.ActionBar.LayoutParams;  
 import android.app.Activity;  
 import android.content.res.Resources;  
 import android.graphics.Color;  
 import android.graphics.drawable.Drawable;  
 import android.os.Bundle;  
 import android.util.TypedValue;  
 import android.view.Menu;  
 import android.view.View;  
 import android.view.ViewGroup;  
 import android.view.Window;  
 import android.view.WindowManager;  
 import android.widget.LinearLayout;  
 import android.widget.ListView;  
 import android.widget.RelativeLayout;  
 import android.widget.TextView;  
  
 @SuppressLint("NewApi")  
 public class MainActivity extends Activity {  
  private RelativeLayout rlLayout;  
  
  @Override 
  protected void onCreate(Bundle savedInstanceState) {  
  super.onCreate(savedInstanceState);  
         setContentView(R.layout.activity_main);  
  //设置ACtionBar 
         ActionBar actionBar = getActionBar();  
         Resources r = getResources();  
         Drawable myDrawable = r.getDrawable(R.drawable.ba);  
         actionBar.setBackgroundDrawable(myDrawable);  
  
         actionBar.setDisplayHomeAsUpEnabled(true);  
         actionBar.setHomeButtonEnabled(true);  
  
         rlLayout = (RelativeLayout) findViewById(R.id.rlayout);  
         ListView listView = (ListView) findViewById(R.id.listView);  
         listView.setAdapter(new MyAdapter(getApplicationContext()));  
  

 <span style="white-space:pre">    </span>//此处判断的目的是让Android系统大于等于4.4的系统才执行沉浸式的功能 
  if (android.os.Build.VERSION.SDK_INT > 18) {  
             Window window = getWindow();  
             window.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS, WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);  
             window.setFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION, WindowManager.LayoutParams.FLAG_TRANSLUCENT_NAVIGATION);  
         }  

 <span style="white-space:pre">    </span>//获取到系统通知栏的高度，然后给系统通知栏设置我们需要的颜色。并将其addView到ViewGroup中。 
  // 创建TextView 
          TextView textView = new TextView(this);  
          LinearLayout.LayoutParams lParams = new LinearLayout.LayoutParams(LayoutParams.MATCH_PARENT, getStatusBarHeight());  
          textView.setBackgroundColor(Color.parseColor("#3F9FE0"));  
          textView.setLayoutParams(lParams);  
  // 获得根视图并把TextView加进去。 
          ViewGroup view = (ViewGroup) getWindow().getDecorView();  
          view.addView(textView);  
      }  
  
  
  //开启全屏模式 
  @SuppressLint("NewApi")  
  public static void hideSystemUI(View view) {  
         view.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE  
                 | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  
                 | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN  
                 | View.SYSTEM_UI_FLAG_HIDE_NAVIGATION  
                 | View.SYSTEM_UI_FLAG_FULLSCREEN  
                 | View.SYSTEM_UI_FLAG_IMMERSIVE_STICKY);  
     }  
  
  //取消全屏模式 
  @SuppressLint("NewApi")  
  public static void showSystemUI(View view) {  
         view.setSystemUiVisibility(  
                 View.SYSTEM_UI_FLAG_LAYOUT_STABLE  
                 | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION  
                 | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);  
     }  
  
  // 获取手机状态栏高度 
  public int getStatusBarHeight() {  
         Class<?> c = null;  
         Object obj = null;  
         Field field = null;  
  int x = 0, statusBarHeight = 0;  
  try {  
             c = Class.forName("com.android.internal.R$dimen");  
             obj = c.newInstance();  
             field = c.getField("status_bar_height");  
             x = Integer.parseInt(field.get(obj).toString());  
             statusBarHeight = getResources().getDimensionPixelSize(x);  
         } catch (Exception e1) {  
             e1.printStackTrace();  
         }  
  return statusBarHeight;  
     }  
  
  // 获取ActionBar的高度 
  public int getActionBarHeight() {  
         TypedValue tv = new TypedValue();  
  int actionBarHeight = 0;  
  if (getTheme().resolveAttribute(android.R.attr.actionBarSize, tv, true))// 如果资源是存在的、有效的 
         {  
             actionBarHeight = TypedValue.complexToDimensionPixelSize(tv.data, getResources().getDisplayMetrics());  
         }  
  return actionBarHeight;  
     }  
 }  

 <?xml version="1.0" encoding="utf-8"?> 
 <shape xmlns:android="http://schemas.android.com/apk/res/android" > 
  
  <gradient 
  android:angle="270" 
  android:endColor="#c8c8c8" 
  android:startColor="#3F9FE0" 
  android:type="linear" /> 
  
 </shape> 

 <?xml version="1.0" encoding="utf-8"?> 
 <manifest xmlns:android="http://schemas.android.com/apk/res/android" 
  package="com.example.androidedemo" 
  android:versionCode="1" 
  android:versionName="1.0" > 
  
  <uses-sdk 
  android:minSdkVersion="8" 
  android:targetSdkVersion="8" /> 
  
  <application 
  android:allowBackup="true" 
  android:icon="@drawable/ic_launcher" 
  android:label="@string/app_name" 
  android:theme="@style/Theme.Timetodo" > 
  <activity 
  android:name="com.example.androidedemo.MainActivity" 
  android:label="@string/app_name" > 
  <intent-filter> 
  <action android:name="android.intent.action.MAIN" /> 
  
  <category android:name="android.intent.category.LAUNCHER" /> 
  </intent-filter> 
  </activity> 
  </application> 
  
 </manifest>