在style.xml中添加
- <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
- 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;
- }
- }
在drawable文件夹中添加
- <?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
- <?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>