做推片段动画

Question

如何通过下一个片段进行推送当前片段的动画

这是我想要的动画:

我当前的动画代码只是将第一个片段与第二个片段重叠,它没有像图片中那样推动它

这是代码:

result_list.setOnItemClickListener(new OnItemClickListener(){

            @Override
            public void onItemClick(AdapterView<?> av, final View view,
                     final int i, long i2) {
                result_list.setEnabled(false);
                view.animate().setDuration(300).translationX(widthListView).alpha(0).
                withEndAction(new Runnable() {
                    @Override
                    public void run() {
                        //setResult(Activity.RESULT_OK,new Intent().putExtra("bussStopCode", data.get(i).getStopCode()).putExtra("bussStopName", data.get(i).getStopName()));
                        ////int get 1
                        //data.remove(i);

                        int temporaryInteger = i;
                        listLastPostion = temporaryInteger;
                        //customAdapter.notifyDataSetChanged();
                        //view.setTranslationX(0);

                        Log.d("data",conreq.getCollectedData().getBusRouteSetData().get(temporaryInteger - 1).getRouteHeading());
                        Bundle bundle = new Bundle();
                        bundle.putString("busdestination", conreq.getCollectedData().getBusRouteSetData().get(temporaryInteger-1).getRouteHeading());
                        bundle.putString("busnumber", conreq.getCollectedData().getBusRouteSetData().get(temporaryInteger-1).getRouteNo());
                        Fragment fragment = new FragmentNextTripForStop();
                        fragment.setArguments(bundle);
                        FragmentTransaction fragmentManager = getFragmentManager().beginTransaction();
                        fragmentManager.setCustomAnimations(R.anim.right_left_anim_x_left,R.anim.right_left_anim_x_right,R.anim.left_right_anim_x_left,R.anim.left_right_anim_x_right);
                        fragmentManager.add(R.id.fragment_searched_data_xml, fragment).addToBackStack(null).commit();
                       // finish();
                        //overridePendingTransition(R.anim.right_left_anim_x_left,R.anim.right_left_anim_x_right);

                    }
                }); 
            }});

Answer 1

虽然这个问题是重复的,但是对于这个问题提供的答案对许多观众来说并不适用,并要求他们在结束时做出一些假设.

考虑到许多应用程序中存在此功能,这是一个很好的问题,但它需要非常复杂的答案.我将尝试将答案分解为一系列分隔步骤,以确保它是可重复的!

问题

阻碍我们大多数人轻易做到这一点的问题是复合性质.要完全理解这个问题,让我列出问题:

• 我们不应该用典型的动画框架为FragmentManager和FragmentTransaction类提供了一个方便的方法,setCustomAnimations(int, int, int int)即要求ObjectAnimators
• 此外,我们不能使用百分比标记ObjectAnimators(传统方法)
• 最后,我们只能在运行时确定屏幕宽度,因此必须在我们自己的布局中具有自定义功能

解决方案

为了解决这个问题并提供所需的沉浸式体验,我们必须从多个角度解决这个问题.接下来的几个步骤将解释如何获取此功能!

1. 我们首先需要为每个定义一个自定义布局,Fragment因为我们必须具有对屏幕宽度的运行时访问权限,以及一个独立的方法来View根据此宽度操纵(布局)的x位置.

   FractionTranslateLinearLayout.java

   public class FractionTranslateLinearLayout extends LinearLayout{
   
       private int screenWidth;
       private float fractionX;
   
       protected void onSizeChanged(int w, int h, int oldW, int oldh){
   
           // Assign the actual screen width to our class variable.
           screenWidth = w;            
   
           super.onSizeChanged(w, h, oldW, oldH);
       }
   
       public float getFractionX(){
   
           return fractionX;
       }
   
       public void setFractionX(float xFraction){
   
           this.fractionX = xFraction;
   
           // When we modify the xFraction, we want to adjust the x translation
           // accordingly.  Here, the scale is that if xFraction is -1, then
           // the layout is off screen to the left, if xFraction is 0, then the 
           // layout is exactly on the screen, and if xFraction is 1, then the 
           // layout is completely offscreen to the right.
           setX((screenWidth > 0) ? (xFraction * screenWidth) : 0);
       }
   }
   

2. 现在,由于我们有一个特殊的布局,允许我们根据屏幕的物理宽度进行转换,我们可以在相关的Fragment XML文件中使用它.

   fragment_1.xml

   <com.[your_package_here].FractionTranslateLinearLayout
       // Omitted namespace.
       android:layout_width="match_parent"
       android:layout_height="match_parent" >
   
       <TextView
           android:id="@+id/text_view_1"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:text="Fragment 1" />
   
   </com.[your_package_here].FractionTranslateLinearLayout>
   

   fragment_2.xml

   <com.[your_package_here].FractionTranslateLinearLayout
       // Omitted namespace.
       android:id="@+id/layout"
       android:layout_width="match_parent"
       android:layout_height="match_parent" >
   
       <TextView
           android:id="@+id/text_view_2"
           android:layout_width="match_parent"
           android:layout_height="match_parent"
           android:text="Fragment 2" />
   
   </com.[your_package_here].FractionTranslateLinearLayout>
   

3. 然后,我们必须创建Fragment包含实现转换的逻辑的类.

   Fragment1.java

   public class Fragment1 extends Fragment {
   
       public View onCreateView(LayoutInflater inf, ViewGroup vg, Bundle b){
   
           // Simply inflate the View from the .xml file.
           return inf.inflate(R.layout.fragment_1, vg, false);
       }
   }
   

   Fragment2.java

   public class Fragment2 extends Fragment {
   
       public View onCreateView(LayoutInflater inf, ViewGroup vg, Bundle b){
   
           // Simply inflate the View from the .xml file.
           return inf.inflate(R.layout.fragment_2, vg, false);
       }
   
       public void onActivityCreated (Bundle savedInstanceState){
   
           View v = getView();
   
           FractionTranslateLinearLayout layout;
           layout = (FractionTranslateLinearLayout) v.findViewById(R.id.layout);
   
           // Move the entire View off to the right of the screen for now.
           layout.setFractionX(1.0f);               
       }
   }
   

4. 现在让我们创建objectAnimator我们将用于View在屏幕上翻译s 的.xml文件.请注意,我们需要其中的四个文件,因为每个进程需要一个(out和in),每侧需要一个(左侧和右侧).

   slide_left_out.xml

   <objectAnimator
       // Omitted namespace.
       android:valueFrom="0"
       android:valueTo="-1"
       // This String must be the exact name of the class variable.
       android:propertyName="xFraction"
       android:valueType="floatType"
       // Duration in milliseconds.
       android:duration="500"/>
   

   slide_right_out.xml

   <objectAnimator
       // Omitted namespace.
       android:valueFrom="0"
       android:valueTo="1"
       // This String must be the exact name of the class variable.
       android:propertyName="xFraction"
       android:valueType="floatType"
       // Duration in milliseconds.
       android:duration="500"/>
   

   slide_left_in.xml

   <objectAnimator
       // Omitted namespace.
       android:valueFrom="-1"
       android:valueTo="0"
       // This String must be the exact name of the class variable.
       android:propertyName="xFraction"
       android:valueType="floatType"
       // Duration in milliseconds.
       android:duration="500"/>
   

   slide_right_in.xml

   <objectAnimator
       // Omitted namespace.
       android:valueFrom="1"
       android:valueTo="0"
       // This String must be the exact name of the class variable.
       android:propertyName="xFraction"
       android:valueType="floatType"
       // Duration in milliseconds.
       android:duration="500"/>
   

请注意,这些文件夹必须放在项目结构的"res/animator"目录中.

1. 创建容器布局,Fragment在我们在它们之间转换时将容纳每个布局.

   main.xml中

   <com.android.FrameLayout
       // Omitted namespace.
       android:id="@+id/main_container"
       android:layout_width="match_parent"
       android:layout_height="match_parent" />
   

2. 现在,我们必须创造Activity将所有东西包装在一起的东西!

   Main.java

   public class Main extends Activity {
   
       private boolean showingFirstFragment;            
   
       public void onCreate(Bundle savedInstanceState){
   
           setContentView(R.layout.main);
   
           FragmentManager manager = getFragmentManager();
   
           FragmentTransaction trans = manager.beginTransaction();
   
           // Keep track of which Fragment we are facing.
           showingFirstFragment = true;
   
           // Add the first Fragment to the container.
           trans.add(R.id.main_container, new Fragment1(), "fragment_1");
   
           trans.commit();
       }
   
       public void onBackPressed(){
   
           // Override the back button functionality to simply switch 
           // Fragments. Note that this would normally be done in a click
           // click listener.
           switchFragments();
       }
   
       private void switchFragments(){
   
           FragmentManager manager = getFragmentManager();
           FragmentTransaction trans = manager.beginTransaction();
   
           // Set the animations that will emulate the functionality you
           // requested.    
           int rightIn = R.animator.slide_right_in;
           int rightOut = R.animator.slide_right_out;
           int leftIn = R.animator.slide_left_in;
           int leftOut = R.animator.slide_left_out;
   
           // Note that we pass in 4 animations here.  Please see the 
           // documentation on this method as it is critical to the 
           // understanding of this solution.
           trans.setCustomAnimations(rightIn, leftOut, leftIn, rightOut);          
   
           if(showingFirstFragment){
   
               int container = R.id.main_container;                
   
               // Show the second Fragment.
               trans.replace(container, new Fragment2(), "fragment_2");
               trans.commit();
   
               showingFirstFragment = false;    
           }
           else{
   
               // Show the first Fragment by popping the back stack!
               manager.popBackStack(null);
   
               showingFirstFragment = true;
           }
       }
   }
   

在此代码示例中,此类被大量使用.它的方法对于流程的执行至关重要!

一些考虑因素

请注意,我在这里做了一些假设,并且这段代码非常独特:

• 此示例使用原始Fragment类,因此除非进行必要的修改,否则将无法使用支持包.
• 此示例要求您使用Android API 13.0或以上.
• 这个例子的目的是提供信息,并希望解释这里涉及的问题.在您自己的编辑器中拼凑代码是您应该自行决定的事情!

希望这里有足够的细节来回答你的问题.如果您需要,请告诉我.

此时,应该有足够的代码来实现您自己的解决方案.我确实在没有Eclipse编辑器的情况下输入了它,所以如果有任何错误,请提前接受我的道歉!