android沉浸式状态栏的实现

在style.xml中添加

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<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>

其中 android:windowTranslucentStatus表示是否要填充顶部的状态栏区域

android:windowTranslucentNavigation表示是否要填充底部的状态栏区域

这两种样式的目的就是默认让应用的内容放置到系统栏的下边，如果仅仅想扩展背景样式到系统栏下边，则需要设置android:fitsSystemWindows为true，

会增加试图的Pading值让你的布局恢复正常大小，并且可以将背景扩大。

在已经创建的Activity中添加

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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()));



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<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_N***IGATION, WindowManager.LayoutParams.FLAG_TRANSLUCENT_N***IGATION);

}

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<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_N***IGATION

| View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN

| View.SYSTEM_UI_FLAG_HIDE_N***IGATION

| 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_N***IGATION

| 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;

}

}

在drawable文件夹中添加

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<?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>

此代码是给您的导航条设置一个渐变，目的是让导航条和系统通知栏的样式融合看起来更加紧密。

最后在AndroidManifest.xml文件中将Application中的theme更改为上边我们定义的样式

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<?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>