原文地址:http://blog.csdn.net/stevenhu_223/article/details/12428591
小米Launcher有一个细节上的功能效果:在长按桌面应用图标时,会隐藏状态栏,然后在状态栏原有的布局上显示卸载或删除的操作栏。放手后,操作栏隐藏,状态栏显示出来。也就是说,这个过程是涉及到对状态栏的动态操作的。
View类提供了setSystemUiVisibility和getSystemUiVisibility方法,这两个方法实现对状态栏的动态显示或隐藏的操作,以及获取状态栏当前可见性。
setSystemUiVisibility(int visibility)方法可传入的实参为:
1. View.SYSTEM_UI_FLAG_VISIBLE:显示状态栏,Activity不全屏显示(恢复到有状态的正常情况)。
2. View.INVISIBLE:隐藏状态栏,同时Activity会伸展全屏显示。
3. View.SYSTEM_UI_FLAG_FULLSCREEN:Activity全屏显示,且状态栏被隐藏覆盖掉。
4. View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN:Activity全屏显示,但状态栏不会被隐藏覆盖,状态栏依然可见,Activity顶端布局部分会被状态遮住。
5. View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION:效果同View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
6. View.SYSTEM_UI_LAYOUT_FLAGS:效果同View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
7. View.SYSTEM_UI_FLAG_HIDE_NAVIGATION:隐藏虚拟按键(导航栏)。有些手机会用虚拟按键来代替物理按键。
8. View.SYSTEM_UI_FLAG_LOW_PROFILE:状态栏显示处于低能显示状态(low profile模式),状态栏上一些图标显示会被隐藏。
下面将以一个demo来验证view的setSystemUiVisibility(int visibility)方法实现动态操作状态栏:
1.MainActivity代码如下:
- package com.example.handlestatusbar;
- import android.annotation.SuppressLint;
- import android.app.Activity;
- import android.os.Bundle;
- import android.view.Menu;
- import android.view.MenuItem;
- import android.view.View;
- import android.view.View.OnClickListener;
- import android.widget.Button;
- import android.widget.RelativeLayout;
- import android.widget.Toast;
- @SuppressLint("NewApi")
- public class MainActivity extends Activity implements OnClickListener
- {
- private RelativeLayout mRLayout;
- private Button mBtn1, mBtn2, mBtn3, mBtn4, mBtn5, mBtn6, mBtn7, mBtn8;
- @Override
- protected void onCreate(Bundle savedInstanceState)
- {
- super.onCreate(savedInstanceState);
- setContentView(R.layout.main);
- mRLayout = (RelativeLayout)findViewById(R.id.content);
- mBtn1 = (Button)findViewById(R.id.btn1);
- mBtn2 = (Button)findViewById(R.id.btn2);
- mBtn3 = (Button)findViewById(R.id.btn3);
- mBtn4 = (Button)findViewById(R.id.btn4);
- mBtn5 = (Button)findViewById(R.id.btn5);
- mBtn6 = (Button)findViewById(R.id.btn6);
- mBtn7 = (Button)findViewById(R.id.btn7);
- mBtn8 = (Button)findViewById(R.id.btn8);
- mBtn1.setOnClickListener(this);
- mBtn2.setOnClickListener(this);
- mBtn3.setOnClickListener(this);
- mBtn4.setOnClickListener(this);
- mBtn5.setOnClickListener(this);
- mBtn6.setOnClickListener(this);
- mBtn7.setOnClickListener(this);
- mBtn8.setOnClickListener(this);
- }
- @Override
- public void onClick(View v)
- {
- // TODO Auto-generated method stub
- switch (v.getId())
- {
- case R.id.btn1:
- //显示状态栏,Activity不全屏显示(恢复到有状态的正常情况)
- mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);
- break;
- case R.id.btn2:
- //隐藏状态栏,同时Activity会伸展全屏显示
- mRLayout.setSystemUiVisibility(View.INVISIBLE);
- break;
- case R.id.btn3:
- //Activity全屏显示,且状态栏被隐藏覆盖掉。
- mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_FULLSCREEN);
- break;
- case R.id.btn4:
- //Activity全屏显示,但状态栏不会被隐藏覆盖,状态栏依然可见,Activity顶端布局部分会被状态遮住
- mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
- break;
- case R.id.btn5:
- //同mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
- mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION);
- break;
- case R.id.btn6:
- //同mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
- mRLayout.setSystemUiVisibility(View.SYSTEM_UI_LAYOUT_FLAGS);
- break;
- case R.id.btn7:
- //隐藏虚拟按键(导航栏)
- mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_HIDE_NAVIGATION);
- break;
- case R.id.btn8:
- //状态栏显示处于低能显示状态(low profile模式),状态栏上一些图标显示会被隐藏。
- mRLayout.setSystemUiVisibility(View.SYSTEM_UI_FLAG_LOW_PROFILE);
- break;
- }
- }
- }
2.布局文件main.xml文件的代码如下:
- <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
- xmlns:tools="http://schemas.android.com/tools"
- android:layout_width="match_parent"
- android:layout_height="match_parent"
- tools:context=".MainActivity"
- android:id="@+id/content">
- <LinearLayout
- android:orientation="vertical"
- android:layout_width="match_parent"
- android:layout_height="match_parent">
- <Button
- android:id="@+id/btn1"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s1"/>
- <Button
- android:id="@+id/btn2"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s2"/>
- <Button
- android:id="@+id/btn3"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s3"/>
- <Button
- android:id="@+id/btn4"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s4"/>
- <Button
- android:id="@+id/btn5"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s5"/>
- <Button
- android:id="@+id/btn6"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s6"/>
- <Button
- android:id="@+id/btn7"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s7"/>
- <Button
- android:id="@+id/btn8"
- android:layout_width="fill_parent"
- android:layout_height="wrap_content"
- android:text="@string/s8"/>
- </LinearLayout>
- </RelativeLayout>
- <?xml version="1.0" encoding="utf-8"?>
- <resources>
- <string name="app_name">HandleStatusBar</string>
- <string name="hello_world">Hello world!</string>
- <string name="menu_settings">Settings</string>
- <string name="s1">SYSTEM_UI_FLAG_VISIBLE</string>
- <string name="s2">INVISIBLE</string>
- <string name="s3">SYSTEM_UI_FLAG_FULLSCREEN</string>
- <string name="s4">SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN</string>
- <string name="s5">SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION</string>
- <string name="s6">SYSTEM_UI_LAYOUT_FLAGS</string>
- <string name="s7">SYSTEM_UI_FLAG_HIDE_NAVIGATION</string>
- <string name="s8">SYSTEM_UI_FLAG_LOW_PROFILE</string>
- </resources>
- 顶
- 2