import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
public ScrimInsetsFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    this.mTempRect = new Rect();
    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.ScrimInsetsFrameLayout, defStyleAttr, R.style.Widget_Design_ScrimInsetsFrameLayout);
    this.mInsetForeground = a.getDrawable(R.styleable.ScrimInsetsFrameLayout_insetForeground);
    a.recycle();
    setWillNotDraw(true);
    ViewCompat.setOnApplyWindowInsetsListener(this, new OnApplyWindowInsetsListener() {
        public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) {
            if (ScrimInsetsFrameLayout.this.mInsets == null) {
                ScrimInsetsFrameLayout.this.mInsets = new Rect();
            }
            ScrimInsetsFrameLayout.this.mInsets.set(insets.getSystemWindowInsetLeft(), insets.getSystemWindowInsetTop(), insets.getSystemWindowInsetRight(), insets.getSystemWindowInsetBottom());
            ScrimInsetsFrameLayout.this.onInsetsChanged(ScrimInsetsFrameLayout.this.mInsets);
            ScrimInsetsFrameLayout scrimInsetsFrameLayout = ScrimInsetsFrameLayout.this;
            boolean z = ScrimInsetsFrameLayout.this.mInsets.isEmpty() || ScrimInsetsFrameLayout.this.mInsetForeground == null;
            scrimInsetsFrameLayout.setWillNotDraw(z);
            ViewCompat.postInvalidateOnAnimation(ScrimInsetsFrameLayout.this);
            return insets.consumeSystemWindowInsets();
        }
    });
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
public AppBarLayout(Context context, AttributeSet attrs) {
    super(context, attrs);
    this.mTotalScrollRange = -1;
    this.mDownPreScrollRange = -1;
    this.mDownScrollRange = -1;
    this.mPendingAction = 0;
    setOrientation(1);
    ThemeUtils.checkAppCompatTheme(context);
    TypedArray a = context.obtainStyledAttributes(attrs, R.styleable.AppBarLayout, 0, R.style.Widget_Design_AppBarLayout);
    this.mTargetElevation = (float) a.getDimensionPixelSize(R.styleable.AppBarLayout_elevation, 0);
    setBackgroundDrawable(a.getDrawable(R.styleable.AppBarLayout_android_background));
    if (a.hasValue(R.styleable.AppBarLayout_expanded)) {
        setExpanded(a.getBoolean(R.styleable.AppBarLayout_expanded, false));
    }
    a.recycle();
    ViewUtils.setBoundsViewOutlineProvider(this);
    this.mListeners = new ArrayList();
    ViewCompat.setElevation(this, this.mTargetElevation);
    ViewCompat.setOnApplyWindowInsetsListener(this, new OnApplyWindowInsetsListener() {
        public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) {
            return AppBarLayout.this.onWindowInsetChanged(insets);
        }
    });
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
private WindowInsetsCompat setWindowInsets(WindowInsetsCompat insets) {
    boolean z = true;
    if (this.mLastInsets == insets) {
        return insets;
    }
    this.mLastInsets = insets;
    boolean z2 = insets != null && insets.getSystemWindowInsetTop() > 0;
    this.mDrawStatusBarBackground = z2;
    if (this.mDrawStatusBarBackground || getBackground() != null) {
        z = false;
    }
    setWillNotDraw(z);
    insets = dispatchApplyWindowInsetsToBehaviors(insets);
    requestLayout();
    return insets;
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
private void setupForInsets() {
  if (Build.VERSION.SDK_INT < 21) {
    return;
  }

  if (ViewCompat.getFitsSystemWindows(this)) {
    if (applyWindowInsetsListener == null) {
      applyWindowInsetsListener =
          new android.support.v4.view.OnApplyWindowInsetsListener() {
            @Override
            public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) {
              return setWindowInsets(insets);
            }
          };
    }
    // First apply the insets listener
    ViewCompat.setOnApplyWindowInsetsListener(this, applyWindowInsetsListener);

    // Now set the sys ui flags to enable us to lay out in the window insets
    setSystemUiVisibility(
        View.SYSTEM_UI_FLAG_LAYOUT_STABLE | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
  } else {
    ViewCompat.setOnApplyWindowInsetsListener(this, null);
  }
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
public ScrimInsetsFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
	super(context, attrs, defStyleAttr);
	final TypedArray a = context.obtainStyledAttributes(attrs,
			R.styleable.ScrimInsetsFrameLayout, defStyleAttr,
			R.style.Widget_Design_ScrimInsetsFrameLayout);
	mInsetForeground = a.getDrawable(R.styleable.ScrimInsetsFrameLayout_insetForeground);
	a.recycle();
	setWillNotDraw(true); // No need to draw until the insets are adjusted
	ViewCompat.setOnApplyWindowInsetsListener(this,
			new android.support.v4.view.OnApplyWindowInsetsListener() {
				@Override
				public WindowInsetsCompat onApplyWindowInsets(View v,
															  WindowInsetsCompat insets) {
					if (null == mInsets) {
						mInsets = new Rect();
					}
					mInsets.set(insets.getSystemWindowInsetLeft(),
							insets.getSystemWindowInsetTop(),
							insets.getSystemWindowInsetRight(),
							insets.getSystemWindowInsetBottom());
					setWillNotDraw(mInsets.isEmpty() || mInsetForeground == null);
					ViewCompat.postInvalidateOnAnimation(ScrimInsetsFrameLayout.this);
					return insets.consumeSystemWindowInsets();
				}
			});
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
/**
 * Creates and returns a listener, which allows to observe when window insets are applied to the
 * root view of the view hierarchy, which is modified by the decorator.
 *
 * @return The listener, which has been created, as an instance of the type {@link
 * OnApplyWindowInsetsListener}
 */
private OnApplyWindowInsetsListener createWindowInsetsListener() {
    return new OnApplyWindowInsetsListener() {

        @Override
        public WindowInsetsCompat onApplyWindowInsets(final View v,
                                                      final WindowInsetsCompat insets) {
            systemWindowInsets = insets.hasSystemWindowInsets() ?
                    new Rect(insets.getSystemWindowInsetLeft(),
                            insets.getSystemWindowInsetTop(),
                            insets.getSystemWindowInsetRight(),
                            insets.getSystemWindowInsetBottom()) : null;
            adaptLayoutParams();
            return insets;
        }

    };
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
/**
 * set StatusBarColor
 */
public static void setStatusBarColor(Activity activity, int statusColor) {
    Window window = activity.getWindow();

    window.clearFlags(WindowManager.LayoutParams.FLAG_TRANSLUCENT_STATUS);
    window.addFlags(WindowManager.LayoutParams.FLAG_DRAWS_SYSTEM_BAR_BACKGROUNDS);
    window.setStatusBarColor(statusColor);
    window.getDecorView().setSystemUiVisibility(View.SYSTEM_UI_FLAG_VISIBLE);

    ViewGroup mContentView = (ViewGroup) window.findViewById(Window.ID_ANDROID_CONTENT);
    View mChildView = mContentView.getChildAt(0);
    if (mChildView != null) {
        ViewCompat.setOnApplyWindowInsetsListener(mChildView, new OnApplyWindowInsetsListener() {
            @Override
            public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) {
                return insets;
            }
        });
        ViewCompat.setFitsSystemWindows(mChildView, true);
        ViewCompat.requestApplyInsets(mChildView);
    }
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
private WindowInsetsCompat setWindowInsets(WindowInsetsCompat insets) {
    if (Build.VERSION.SDK_INT >= 21 && mWindowInsetLayoutWR.get() != null) {
        if (mWindowInsetLayoutWR.get().applySystemWindowInsets21(insets)) {
            return insets.consumeSystemWindowInsets();
        }
    }
    return insets;
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) {
    WindowInsetsCompat newInsets = null;

    if (ViewCompat.getFitsSystemWindows(this)) {
        // If we're set to fit system windows, keep the insets
        newInsets = insets;
    }

    // If our insets have changed, keep them and invalidate the scroll ranges...
    if (!QMUILangHelper.objectEquals(mLastInsets, newInsets)) {
        mLastInsets = newInsets;
        requestLayout();
    }

    // Consume the insets. This is done so that child views with fitSystemWindows=true do not
    // get the default padding functionality from View
    return insets.consumeSystemWindowInsets();
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) {
  WindowInsetsCompat newInsets = null;

  if (ViewCompat.getFitsSystemWindows(this)) {
    // If we're set to fit system windows, keep the insets
    newInsets = insets;
  }

  // If our insets have changed, keep them and invalidate the scroll ranges...
      if (!ObjectsCompat.equals(mLastInsets, newInsets)) {
    mLastInsets = newInsets;
    invalidateScrollRanges();
  }

  return insets;
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
private WindowInsetsCompat dispatchApplyWindowInsetsToBehaviors(WindowInsetsCompat insets) {
  if (insets.isConsumed()) {
    return insets;
  }

  for (int i = 0, z = getChildCount(); i < z; i++) {
    final View child = getChildAt(i);
    if (ViewCompat.getFitsSystemWindows(child)) {
      final LayoutParams lp = (LayoutParams) child.getLayoutParams();
      final Behavior b = lp.getBehavior();

      if (b != null) {
        // If the view has a behavior, let it try first
        insets = b.onApplyWindowInsets(this, child, insets);
        if (insets.isConsumed()) {
          // If it consumed the insets, break
          break;
        }
      }
    }
  }

  return insets;
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
private void setupForInsets() {
  if (Build.VERSION.SDK_INT < 21) {
    return;
  }

  if (ViewCompat.getFitsSystemWindows(this)) {
    if (mApplyWindowInsetsListener == null) {
      mApplyWindowInsetsListener =
          new android.support.v4.view.OnApplyWindowInsetsListener() {
            @Override
                          public WindowInsetsCompat onApplyWindowInsets(View v,
                                  WindowInsetsCompat insets) {
              return setWindowInsets(insets);
            }
          };
    }
    // First apply the insets listener
    ViewCompat.setOnApplyWindowInsetsListener(this, mApplyWindowInsetsListener);

    // Now set the sys ui flags to enable us to lay out in the window insets
          setSystemUiVisibility(View.SYSTEM_UI_FLAG_LAYOUT_STABLE
                  | View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN);
  } else {
    ViewCompat.setOnApplyWindowInsetsListener(this, null);
  }
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
private WindowInsetsCompat dispatchApplyWindowInsetsToBehaviors(WindowInsetsCompat insets) {
    if (insets.isConsumed()) {
        return insets;
    }
    int z = getChildCount();
    for (int i = 0; i < z; i++) {
        View child = getChildAt(i);
        if (ViewCompat.getFitsSystemWindows(child)) {
            Behavior b = ((LayoutParams) child.getLayoutParams()).getBehavior();
            if (b != null) {
                insets = b.onApplyWindowInsets(this, child, insets);
                if (insets.isConsumed()) {
                    break;
                }
            } else {
                continue;
            }
        }
    }
    return insets;
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
@Override
public boolean applySystemWindowInsets21(WindowInsetsCompat insets) {
    WindowInsetsCompat newInsets = null;

    if (ViewCompat.getFitsSystemWindows(this)) {
        // If we're set to fit system windows, keep the insets
        newInsets = insets;
    }

    // If our insets have changed, keep them and invalidate the scroll ranges...
    if (!QMUILangHelper.objectEquals(mLastInsets, newInsets)) {
        mLastInsets = newInsets;
        requestLayout();
    }
    return true;
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
public ScrimInsetsFrameLayout(Context context, AttributeSet attrs, int defStyleAttr) {
    super(context, attrs, defStyleAttr);
    this.mTempRect = new Rect();
    TypedArray a = context.obtainStyledAttributes(attrs,
            R.styleable.SnvScrimInsetsFrameLayout,
            defStyleAttr,
            R.style.SnvScrimInsetsFrameLayout);
    this.mInsetForeground = a.getDrawable(R.styleable.SnvScrimInsetsFrameLayout_snvInsetForeground);
    a.recycle();
    this.setWillNotDraw(true);
    ViewCompat.setOnApplyWindowInsetsListener(this,
            new android.support.v4.view.OnApplyWindowInsetsListener() {
                public WindowInsetsCompat onApplyWindowInsets(View v, WindowInsetsCompat insets) {
                    if (null == ScrimInsetsFrameLayout.this.mInsets) {
                        ScrimInsetsFrameLayout.this.mInsets = new Rect();
                    }

                    ScrimInsetsFrameLayout.this.mInsets.set(insets.getSystemWindowInsetLeft(), insets.getSystemWindowInsetTop(), insets.getSystemWindowInsetRight(), insets.getSystemWindowInsetBottom());
                    ScrimInsetsFrameLayout.this.setWillNotDraw(ScrimInsetsFrameLayout.this.mInsets.isEmpty() || ScrimInsetsFrameLayout.this.mInsetForeground == null);
                    ViewCompat.postInvalidateOnAnimation(ScrimInsetsFrameLayout.this);
                    return insets.consumeSystemWindowInsets();
                }
            });
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) {
  WindowInsetsCompat newInsets = null;

  if (ViewCompat.getFitsSystemWindows(this)) {
    // If we're set to fit system windows, keep the insets
    newInsets = insets;
  }

  // If our insets have changed, keep them and invalidate the scroll ranges...
  if (!ObjectsCompat.equals(lastInsets, newInsets)) {
    lastInsets = newInsets;
    invalidateScrollRanges();
  }

  return insets;
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) {
  WindowInsetsCompat newInsets = null;

  if (ViewCompat.getFitsSystemWindows(this)) {
    // If we're set to fit system windows, keep the insets
    newInsets = insets;
  }

  // If our insets have changed, keep them and invalidate the scroll ranges...
  if (!ObjectsCompat.equals(lastInsets, newInsets)) {
    lastInsets = newInsets;
    requestLayout();
  }

  // Consume the insets. This is done so that child views with fitSystemWindows=true do not
  // get the default padding functionality from View
  return insets.consumeSystemWindowInsets();
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
private void setWindowInsets(WindowInsetsCompat insets) {
    if (mLastInsets != insets) {
        mLastInsets = insets;
        mDrawStatusBarBackground = insets != null && insets.getSystemWindowInsetTop() > 0;

        if (insets != null) {
            if (insets.isRound()) {
                if (!(mEdgeGlowTop instanceof CrescentEdgeEffect)) {
                    mEdgeGlowTop = new CrescentEdgeEffect(getContext());
                    mEdgeGlowBottom = new CrescentEdgeEffect(getContext());
                }
            } else {
                if (!(mEdgeGlowTop instanceof ClassicEdgeEffect)) {
                    mEdgeGlowTop = new ClassicEdgeEffect(getContext());
                    mEdgeGlowBottom = new ClassicEdgeEffect(getContext());
                }
            }

            mScrollBarHelper.setIsRound(insets.isRound());
        }

        setWillNotDraw(!mDrawStatusBarBackground && getBackground() == null && mEdgeGlowTop == null);
        dispatchChildApplyWindowInsets(insets);
        requestLayout();
    }
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
WindowInsetsCompat onWindowInsetChanged(final WindowInsetsCompat insets) {
    WindowInsetsCompat newInsets = null;

    if (ViewCompat.getFitsSystemWindows(this)) {
        // If we're set to fit system windows, keep the insets
        newInsets = insets;
    }

    // If our insets have changed, keep them and invalidate the scroll ranges...
    if (!ObjectsCompat.equals(mLastInsets, newInsets)) {
        mLastInsets = newInsets;
        requestLayout();
    }

    // Consume the insets. This is done so that child views with fitSystemWindows=true do not
    // get the default padding functionality from View
    return insets.consumeSystemWindowInsets();
}
 

import android.support.v4.view.WindowInsetsCompat; //导入依赖的package包/类
@TargetApi(21)
private boolean applySystemWindowInsets21(WindowInsetsCompat insets) {
    boolean consumed = false;

    for (int i = 0; i < getChildCount(); i++) {
        View child = getChildAt(i);

        if (!child.getFitsSystemWindows()) {
            continue;
        }

        Rect childInsets = new Rect(
                insets.getSystemWindowInsetLeft(),
                insets.getSystemWindowInsetTop(),
                insets.getSystemWindowInsetRight(),
                insets.getSystemWindowInsetBottom());

        computeInsetsWithGravity(child, childInsets);

        ViewCompat.dispatchApplyWindowInsets(child, insets.replaceSystemWindowInsets(childInsets));

        consumed = true;
    }

    return consumed;
}