全屏模式下不能下拉 上滑(mtk)

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项目需求：在全屏模式下不能显示状态栏/虚拟按键

说白点：全屏模式下不能下拉

因为是在MTK平台研发,离不开源码。。。。

这里不做逻辑解释：

参照网上大神说法：MTK 内部已经开发提供新的接口来实现全屏界面禁止下拉状态栏

4.4平台上的做法：

1. frameworks\base\core\java\android\view\View.java上

1. +    /** 
2. +     * @hide 
3. +     * 
4. +     * NOTE: Flag for {@link #setSystemUiVisibility(int)}: It help user to disable transient 
5. +     * status bar triggered by gesture 
6. +     */  
7. +    public static final int SYSTEM_UI_FLAG_IMMERSIVE_GESTURE_ISOLATED = 0x00002000;

2. frameworks\base\policy\src\com\android\internal\policy\impl\PhoneWindowManager.java

1.         mSystemGestures = new SystemGesturesPointerEventListener(context,  
2.                 new SystemGesturesPointerEventListener.Callbacks() {  
3.                     @Override  
4.                     public void onSwipeFromTop() {  
5. +                        if (isGestureIsolated())  
6. +                            return;  
7.                         if (mStatusBar != null) {  
8.                             requestTransientBars(mStatusBar);  
9.                         }  
10.                     }  
11.                     @Override  
12.                     public void onSwipeFromBottom() {  
13. +                        if (isGestureIsolated())  
14. +                            return;  
15.                         if (mNavigationBar != null && mNavigationBarOnBottom) {  
16.                             requestTransientBars(mNavigationBar);  
17.                         }  
18.                     }  
19.                     @Override  
20.                     public void onSwipeFromRight() {  
21. +                        if (isGestureIsolated())  
22. +                            return;                     
23.                         if (mNavigationBar != null && !mNavigationBarOnBottom) {  
24.                             requestTransientBars(mNavigationBar);  
25.                         }  
26.                     }  
27.                     @Override  
28.                     public void onDebug() {  
29.                         // no-op  
30.                     }  
31. +                    private boolean isGestureIsolated() {  
32. +                        WindowState win = mFocusedWindow != null ? mFocusedWindow : mTopFullscreenOpaqueWindowState;  
33. +                        if (win != null && (win.getSystemUiVisibility() & View.SYSTEM_UI_FLAG_IMMERSIVE_GESTURE_ISOLATED) != 0)  
34. +                            return true;  
35. +                        else  
36. +                            return false;  
37. +                    }  
38.                 }); 
    

对比了一下6.0版本：区别不大

在6.0上就是修改了SYSTEM_UI_FLAG_IMMERSIVE_GESTURE_ISOLATED的变量值:

    /**
     * @hide
     *
     * NOTE: Flag for {@link #setSystemUiVisibility(int)}: It help user to disable transient
     * status bar triggered by gesture
     */
    public static final int SYSTEM_UI_FLAG_IMMERSIVE_GESTURE_ISOLATED = 0x00004000;

使用方法：

Demo：

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    @Override
    public void onWindowFocusChanged(boolean hasFocus) {
        super.onWindowFocusChanged(hasFocus);
        if( hasFocus ) {
            ScreenFull();
        }
    }
    private void ScreenFull() {
        // TODO Auto-generated method stub
        final View decorView = getWindow().getDecorView();
        final int flags = 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
                | 0x00004000;                               //SYSTEM_UI_FLAG_LIGHT_STATUS_BAR
        decorView.setSystemUiVisibility(flags);

        decorView.setOnSystemUiVisibilityChangeListener(new View.OnSystemUiVisibilityChangeListener() {
            @Override
            public void onSystemUiVisibilityChange(int visibility) {
                if ((visibility & View.SYSTEM_UI_FLAG_FULLSCREEN) == 0) {
                    decorView.setSystemUiVisibility(flags);
                }
            }
        });
    }
}

20171102 使用测试发现一个问题：全屏模式下 配置该属性 导致需要按2下Home才能退出到桌面

因而 

SYSTEM_UI_FLAG_LIGHT_STATUS_BAR

该属性，存在的Bug暂时不去处理

针对该问题做出如下修改：（看图 不说话）




测试完美解决：