android.widget.ScrollView.getViewTreeObserver()方法的使用及代码示例

x33g5p2x  于2022-01-29 转载在 其他  
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本文整理了Java中android.widget.ScrollView.getViewTreeObserver()方法的一些代码示例，展示了ScrollView.getViewTreeObserver()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ScrollView.getViewTreeObserver()方法的具体详情如下：
包路径：android.widget.ScrollView
类名称：ScrollView
方法名：getViewTreeObserver

ScrollView.getViewTreeObserver介绍

暂无

代码示例

代码示例来源：origin: Aspsine/SwipeToLoadLayout

@Override
public void onDestroyView() {
  scrollView.getViewTreeObserver().removeOnScrollChangedListener(mOnScrollChangedListener);
  super.onDestroyView();
}

代码示例来源：origin: Aspsine/SwipeToLoadLayout

@Override
public void onViewCreated(View view, Bundle savedInstanceState) {
  super.onViewCreated(view, savedInstanceState);
  swipeToLoadLayout = (SwipeToLoadLayout) view.findViewById(R.id.swipeToLoadLayout);
  scrollView = (ScrollView) view.findViewById(R.id.swipe_target);
  tvTitle = (TextView) view.findViewById(R.id.tvTitle);
  ViewGroup viewGroup = (ViewGroup) view.findViewById(R.id.group);
  // use this method find view is not an good way.
  // do not learn! do not learn! do not learn! important thing say three times. :)
  ivArray = new ImageView[viewGroup.getChildCount()];
  for (int i = 0; i < viewGroup.getChildCount(); i++) {
    ivArray[i] = (ImageView) viewGroup.getChildAt(i);
  }
  swipeToLoadLayout.setOnRefreshListener(this);
  swipeToLoadLayout.setOnLoadMoreListener(this);
  scrollView.getViewTreeObserver().addOnScrollChangedListener(mOnScrollChangedListener);
}

代码示例来源：origin: rey5137/material

mWeekView = (WeekView)v.findViewById(R.id.rd_wv_week);
sv_repeat.getViewTreeObserver().addOnGlobalLayoutListener(new ViewTreeObserver.OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {

代码示例来源：origin: stackoverflow.com

ScrollView scrollView = (ScrollView)findViewById(R.id.svtest);
ViewTreeObserver vto = scrollView.getViewTreeObserver(); 
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() { 
  @Override 
  public void onGlobalLayout() { 
    if (Build.VERSION.SDK_INT < 16)
      scrollView.getViewTreeObserver().removeGlobalOnLayoutListener(listener);
    else
      scrollView.getViewTreeObserver().removeOnGlobalLayoutListener(listener);

    int width  = scrollView.getMeasuredWidth();
    int height = scrollView.getMeasuredHeight(); 

    // postpone any calculation depend on it to here.
    // regardless what it is. UI or http connection.
  } 
});

代码示例来源：origin: stackoverflow.com

ScrollView scrollView = (ScrollView)findViewById(R.id...);
ViewTreeObserver observer = scrollView.getViewTreeObserver();
observer.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    int viewHeight = scrollView.getMeasuredHeight();
    int contentHeight = scrollView.getChildAt(0).getHeight();
    if(viewHeight - contentHeight < 0) {
      // scrollable
    }
  }
});

代码示例来源：origin: hefuyicoder/ZhihuDaily

private void addScrollListener() {
  scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
    @Override
    public void onScrollChanged() {
      if (!isAdded()) {
        return;
      }
      changeHeaderPosition();
      changeToolbarAlpha();
    }
  });
}

代码示例来源：origin: luhaoaimama1/zone-sdk

@Override
  public boolean onPreDraw() {
    sv.getViewTreeObserver().removeOnPreDrawListener(this);
    System.out.println("ViewTreeObserver:onPreDraw");
    //todo  true的时候 能看到页面 false直接卡死了
    return true;
  }
};

代码示例来源：origin: animalize/QuanTangshi

@Override
public void onGlobalLayout() {
  setYPosi(posi);
  // 去掉监听器，因为输入法也会触发这里
  final ViewTreeObserver observer = root.getViewTreeObserver();
  if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.JELLY_BEAN) {
    observer.removeOnGlobalLayoutListener(this);
  } else {
    observer.removeGlobalOnLayoutListener(this);
  }
}

代码示例来源：origin: antest1/kcanotify

@Override
  public boolean onTouch(View view, MotionEvent motionEvent) {
    ViewTreeObserver observer = fleetMenu.getViewTreeObserver();
    observer.addOnScrollChangedListener(fleetMenuScrollChangeListener);
    return false;
  }
});

代码示例来源：origin: luhaoaimama1/zone-sdk

@Override
  public void onGlobalLayout() {
    sv.getViewTreeObserver().removeOnGlobalLayoutListener(this);
    System.out.println("ViewTreeObserver:OnGlobalLayoutListener"
        + "->可见性：" + (sv.getVisibility() == View.VISIBLE ? "可见" : "不可见"));
  }
});

代码示例来源：origin: stackoverflow.com

ScrollView scrollView = (ScrollView)findViewById(R.id.contentScrollView);
ImageView imageView = (ImageView)findViewById(R.id.contentImageView);

ViewTreeObserver vto = scrollView.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
  @Override
  public void onGlobalLayout() {
    scrollView.getViewTreeObserver().removeGlobalOnLayoutListener(this);
    int width  = scrollView.getMeasuredWidth();
    int height = scrollView.getMeasuredHeight();

    LinearLayout.LayoutParams layoutParams = new LinearLayout.LayoutParams(layoutParams.MATCH_PARENT, height * 0.8f);
    imageView.setLayoutParams(layoutParams);
  }
});

代码示例来源：origin: stackoverflow.com

final ScrollView myScroll = (ScrollView)findViewById(R.id.my_scroll);
ViewTreeObserver vto = myScroll.getViewTreeObserver();
vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {

  @Override
  public void onGlobalLayout() {
    LayerDrawable ld = (LayerDrawable)myScroll.getBackground();
    height = myScroll.getHeight();
    width=myScroll.getHeight();
    ViewTreeObserver obs = myScroll.getViewTreeObserver();
    obs.removeOnGlobalLayoutListener(this);
  }

});

代码示例来源：origin: xbmc/Kore

@Override
public void onDestroyView() {
  mediaPanel.getViewTreeObserver().removeOnScrollChangedListener(this);
  super.onDestroyView();
  unbinder.unbind();
}

代码示例来源：origin: byhieg/easyweather

@Override
public void onResume() {
  super.onResume();
  if (scrollView != null) {
    scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
      @Override
      public void onScrollChanged() {
        if (mSwipeLayout != null) {
          mSwipeLayout.setEnabled(scrollView.getScrollY() == 0);
        }
      }
    });
  }
}

代码示例来源：origin: xbmc/Kore

@Override
public void onActivityCreated (Bundle savedInstanceState) {
  super.onActivityCreated(savedInstanceState);
  setHasOptionsMenu(false);
  /** Setup dim the fanart when scroll changes
   * Full dim on 4 * iconSize dp
   * @see {@link #onScrollChanged()}
   */
  pixelsToTransparent  = 4 * getActivity().getResources().getDimensionPixelSize(R.dimen.default_icon_size);
  mediaPanel.getViewTreeObserver().addOnScrollChangedListener(this);
}

代码示例来源：origin: stackoverflow.com

private ScrollView mScroll;
 /** Called when the activity is first created. */
 @Override
 public void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_history);
   mScroll = (ScrollView) findViewById(R.id.scroll_view);
   ViewTreeObserver vto = mScroll.getViewTreeObserver();
   vto.addOnGlobalLayoutListener(new OnGlobalLayoutListener() {
     @Override
     public void onGlobalLayout() {
       mScroll.getViewTreeObserver().removeGlobalOnLayoutListener(this);
       int scrollHeight = mScroll.getChildAt(0).getMeasuredHeight();
       mScroll.scrollTo(0, scrollHeight);
     }
   }); 
 }
 @Override
 protected void onResume() {
   super.onResume();
     mHandler.postDelayed(new Runnable() {
     @Override
     public void run() {
       mScroll.smoothScrollTo(0, 0);
     }
   }, 800);
 }

代码示例来源：origin: chendongMarch/LightAdapter

@BindingAdapter(value = {"bindScroll"})
  public static void onScrollChangeCommand(
      final ScrollView scrollView,
      final ViewTreeObserver.OnScrollChangedListener onScrollChangedListener) {
    scrollView.getViewTreeObserver().addOnScrollChangedListener(() -> {
      if (onScrollChangedListener != null) {
        onScrollChangedListener.onScrollChanged();
      }
    });
  }
}

代码示例来源：origin: stackoverflow.com

public class MainActivityList extends Activity {

  ScrollView scroll1, scroll2;

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

    ListView list_1 = (ListView) findViewById(R.id.list_1);
    // Set list_1 Adapter
    SetListOneHeight.setListViewHeight(list_1);

    ListView list_2 = (ListView) findViewById(R.id.list_2);
    // Set list_2 Adapter
    SetListTwoHeight.setListViewHeight(list_2);

    scroll1 = (ScrollView) findViewById(R.id.scroll1);
    scroll2 = (ScrollView) findViewById(R.id.scroll2);

    scroll1.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
      @Override
      public void onScrollChanged() {
        int scrollY = scroll1.getScrollY();
        scroll2.scrollTo(0, scrollY);
      }
    });
  }
}

代码示例来源：origin: ywwynm/EverythingDone

@Override
protected void setEvents() {
  mScrollView.getViewTreeObserver().addOnScrollChangedListener(
      new ViewTreeObserver.OnScrollChangedListener() {
        @Override
        public void onScrollChanged() {
          updateFabState();
          updateActionbarState();
        }
      });
  mFab.setOnClickListener(new View.OnClickListener() {
    @Override
    public void onClick(View v) {
      doWithPermissionChecked(
        new SimplePermissionCallback(StatisticActivity.this) {
          @Override
          public void onGranted() {
            startScreenshot();
          }
        },
        Def.Communication.REQUEST_PERMISSION_SCREENSHOT,
        Manifest.permission.WRITE_EXTERNAL_STORAGE);
    }
  });
}

代码示例来源：origin: alphamu/FrostyBackgroundTestApp

mBinding.scrollView.getViewTreeObserver().addOnScrollChangedListener(new ViewTreeObserver.OnScrollChangedListener() {
 @Override
 public void onScrollChanged() {

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