前几天在学习RecyclerView时候,一直失败,各种加载不上。下面是错误信息
D/AndroidRuntime: Shutting down VM
E/AndroidRuntime: FATAL EXCEPTION: main
Process:examples.ouc.com.learnrv, PID: 3030
java.lang.NoSuchMethodError:No static method getDisplay(Landroid/view/View;)Landroid/view/Display; in classLandroid/support/v4/view/ViewCompat; or its super classes (declaration of'android.support.v4.view.ViewCompat' appears in/data/data/examples.ouc.com.learnrv/files/instant-run/dex/slice-com.android.support-support-v4-23.4.0_52b240d56765eb2183f5273fe09102c073fde4ef-classes.dex)
atandroid.support.v7.widget.RecyclerView.onAttachedToWindow(RecyclerView.java:2391)
atandroid.view.View.dispatchAttachedToWindow(View.java:14514)
atandroid.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2836)
atandroid.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2843)
atandroid.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2843)
at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2843)
atandroid.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2843)
atandroid.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2843)
atandroid.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1364)
atandroid.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
atandroid.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
atandroid.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
atandroid.view.Choreographer.doCallbacks(Choreographer.java:670)
atandroid.view.Choreographer.doFrame(Choreographer.java:606)
atandroid.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:844)
atandroid.os.Handler.handleCallback(Handler.java:739)
atandroid.os.Handler.dispatchMessage(Handler.java:95)
atandroid.os.Looper.loop(Looper.java:148)
atandroid.app.ActivityThread.main(ActivityThread.java:5417)
atjava.lang.reflect.Method.invoke(Native Method)
atcom.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
atcom.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
先说一下我的步骤吧:
1,首先创建一个Activity,然后添加依赖库:
2,然后在代码中添加RecyclerView:
1 public class MainActivity extends AppCompatActivity { 2 3 private RecyclerView rv; 4 5 @Override 6 protected void onCreate(Bundle savedInstanceState) { 7 super.onCreate(savedInstanceState); 8 9 rv = new RecyclerView(this); 10 setContentView(rv); 11 12 //设置布局 13 rv.setLayoutManager(new LinearLayoutManager(this)); 14 //添加内容 15 rv.setAdapter(new RecyclerView.Adapter() { 16 class ViewHolder extends RecyclerView.ViewHolder{ 17 //绑定子对象的视图 18 private TextView tv; 19 20 public ViewHolder(TextView itemView) { 21 super(itemView); 22 tv=itemView; 23 } 24 25 public TextView getTv() { 26 return tv; 27 } 28 } 29 //创建holder 30 @Override 31 public RecyclerView.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 32 return new ViewHolder(new TextView(parent.getContext())); 33 } 34 35 //对holder的textView进行操作 36 @Override 37 //第一个参数是我们绑定的holder 38 //第二个是一个索引,我们的当前初始化的数据是哪一条 39 public void onBindViewHolder(RecyclerView.ViewHolder holder, int position) { 40 41 //注意这里引入的ViewHolder类是我们上面创建的类,不要加错包 42 ViewHolder vh = (ViewHolder) holder; 43 vh.getTv().setText("Item "+ position); 44 } 45 46 //获取RecylerView子对象数量 47 @Override 48 public int getItemCount() { 49 return 10; 50 } 51 }); 52 } 53 }
3,如果我们现在加载进去,就会和上面报错一样~
而代码应该是没有问题的,我纠结了几天,然后在网上看了好多分析
最后,在下面这个地方,会发现:
大体意思就是说,SDK的版本有问题,就是说版本有问题?我就想怎么会有问题呢?
我们回头看第一个图,添加依赖库时候,我们添加的是v7:25.0.0 而appcompat的版本是v7:23.4.0,
RecylerView的版本比appcompat的版本高,是不支持的!
因此解决方法就很明显了:
将appcompat的版本调整到一样就好了,在添加依赖库的界面将appcompat删除掉,重新加一个高版本的。
这时候你会发现,其实添加的库里面并没有v7:23.4.0版本的,就很坑爹有没有。这时候在运行就没问题了~