AppBarLayout崩潰檢測不能正常工作

我跟着this教程這裏在GitHub上設計一個自定義的AppBarLayout &檢測到它的完全崩潰&完成擴展。我會詳細介紹如下AppBarLayout崩潰檢測不能正常工作

content_main.xml

<?xml version="1.0" encoding="utf-8"?> 
<android.support.design.widget.CoordinatorLayout 
    xmlns:android="http://schemas.android.com/apk/res/android" 
    xmlns:app="http://schemas.android.com/apk/res-auto" 
    android:orientation="vertical" 
    android:layout_width="match_parent" 
    android:layout_height="wrap_content" 
    android:background="@android:color/background_light" 
    android:fitsSystemWindows="true"> 


    <tries.auro.tryapp.CustomAppBarLayout 
     android:id="@+id/appBarLayout" 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar" 
     android:fitsSystemWindows="true"> 

     <android.support.design.widget.CollapsingToolbarLayout 
      android:id="@+id/collapsingToolbar" 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      app:layout_scrollFlags="scroll|exitUntilCollapsed" 
      android:fitsSystemWindows="true" 
      app:contentScrim="?attr/colorPrimary"> 

      <ImageView 
       android:layout_width="match_parent" 
       android:layout_height="300dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY" 
       app:layout_collapseMode="parallax"/> 

      <android.support.v7.widget.Toolbar 
       android:layout_width="match_parent" 
       android:layout_height="60dp" 
       app:layout_collapseMode="pin" 
       android:padding="0dp"> 

       <ImageView 
        android:id="@+id/imageView" 
        android:layout_width="match_parent" 
        android:layout_height="match_parent" 
        android:background="@android:color/white" 
        android:scaleType="fitXY" 
        android:visibility="gone"/> 

      </android.support.v7.widget.Toolbar> 



     </android.support.design.widget.CollapsingToolbarLayout> 

    </tries.auro.tryapp.CustomAppBarLayout> 

    <android.support.v4.widget.NestedScrollView 
     android:layout_width="match_parent" 
     android:layout_height="wrap_content" 
     android:padding="20dp" 
     app:layout_behavior="@string/appbar_scrolling_view_behavior"> 

     <LinearLayout 
      android:layout_width="match_parent" 
      android:layout_height="wrap_content" 
      android:orientation="vertical"> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

      <ImageView 
       android:layout_width="150dp" 
       android:layout_height="150dp" 
       android:src="@drawable/pic" 
       android:scaleType="fitXY"/> 

     </LinearLayout> 
    </android.support.v4.widget.NestedScrollView> 


</android.support.design.widget.CoordinatorLayout>

MainActivity.java

package tries.auro.tryapp; 

import android.provider.Settings; 
import android.support.design.widget.AppBarLayout; 
import android.support.design.widget.CollapsingToolbarLayout; 
import android.support.v4.view.ViewCompat; 
import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.support.v7.widget.Toolbar; 
import android.widget.ImageView; 
import android.widget.Toast; 

public class MainActivity extends AppCompatActivity { 

    private ImageView imageView; 
    private CustomAppBarLayout appBarLayout; 
    private CollapsingToolbarLayout collapsingToolbarLayout; 

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

     init(); 
     setOnClickListeners(); 
    } 


    private void init() { 

     imageView = (ImageView) findViewById(R.id.imageView); 
     appBarLayout = (CustomAppBarLayout) findViewById(R.id.appBarLayout); 
     collapsingToolbarLayout = (CollapsingToolbarLayout) findViewById(R.id.collapsingToolbar); 
    } 

    public void setOnClickListeners() { 
     appBarLayout.setOnStateChangeListener(new CustomAppBarLayout.OnStateChangeListener() { 
      @Override 
      public void onStateChange(CustomAppBarLayout.State toolbarChange) { 
       switch (toolbarChange) { 
        case COLLAPSED: 
         System.out.println("***COLLAPSED***"); 
        case EXPANDED: 
         System.out.println("***EXPANDED***"); 
       } 
      } 
     }); 
    } 
}

CustomAppBarLayout.java

package tries.auro.tryapp; 

import android.content.Context; 
import android.support.design.widget.AppBarLayout; 
import android.support.design.widget.BottomSheetBehavior; 
import android.support.design.widget.CoordinatorLayout; 
import android.util.AttributeSet; 

/** 
* Created by stpl on 29/7/16. 
*/ 
public class CustomAppBarLayout extends AppBarLayout implements AppBarLayout.OnOffsetChangedListener { 

    public enum State{ 
     COLLAPSED, 
     EXPANDED, 
     IDLE 
    } 

    public interface OnStateChangeListener{ 
     void onStateChange(State toolbarChange); 
    } 

    private State state; 
    private OnStateChangeListener onStateChangeListener; 

    public CustomAppBarLayout(Context context){ 
     super(context); 
    } 

    public CustomAppBarLayout(Context context, AttributeSet attributeSet){ 
     super(context,attributeSet); 
    } 

    @Override 
    protected void onAttachedToWindow() { 
     super.onAttachedToWindow(); 
     if(!(getLayoutParams() instanceof CoordinatorLayout.LayoutParams) 
       || !(getParent() instanceof CoordinatorLayout)){ 
      throw new IllegalStateException(
        "CustomAppBarLayout must be a direct child of CoordinatorLayout"); 
      } 
     addOnOffsetChangedListener(this); 
    } 

    @Override 
    public void onOffsetChanged(AppBarLayout appBarLayout, int verticalOffset) { 
     if(verticalOffset == 0){ 
      if(onStateChangeListener != null && state != State.EXPANDED){ 
       onStateChangeListener.onStateChange(State.EXPANDED); 
      } 
      state = State.EXPANDED; 

     } else if(Math.abs(verticalOffset) >= appBarLayout.getTotalScrollRange()){ 
      if(onStateChangeListener != null && state != State.COLLAPSED){ 
       onStateChangeListener.onStateChange(State.COLLAPSED); 
      } 
      state = State.COLLAPSED; 
     } 

    } 

    public void setOnStateChangeListener(OnStateChangeListener listener) { 
     this.onStateChangeListener = listener; 
    } 
}

在Java & XML代碼

問題這裏是：的System.out.println執行***EXPANDED***消息在屏幕上時，它的完全展開，但是都***EXPANDED*** & ***COLLAPSED***時，它的徹底崩潰。

下面就是我得到我的logcat

07-29 13:50:04.190 32380-32425/tries.auro.tryapp I/OpenGLRenderer: Initialized EGL, version 1.4 
07-29 13:50:04.210 32380-32380/tries.auro.tryapp I/System.out: ***EXPANDED*** 
07-29 13:50:04.967 32380-32380/tries.auro.tryapp I/Choreographer: Skipped 44 frames! The application may be doing too much work on its main thread. 
07-29 13:50:08.517 32380-32380/tries.auro.tryapp I/System.out: ***COLLAPSED*** 
07-29 13:50:08.518 32380-32380/tries.auro.tryapp I/System.out: ***EXPANDED***

我要去哪裏錯了？感謝您的時間！！

來源

2016-07-29 Auro

VIsit to This link。這裏添加activity_detail.xml而不是main.java中的activity_main.xml。我希望這個解決你的問題。

來源

2016-07-29 09:37:22 Niroj

AppBarLayout崩潰檢測不能正常工作

回答

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