使用RecyclerView出现Only the origina

使用RecyclerView出现Only the original thread that created a view hierarchy can touch its views异常
请看我的代码

packagecom.liqipeter.fruits;

importandroid.os.Handler;

importandroid.os.Message;

importandroid.support.annotation.NonNull;

importandroid.support.design.widget.FloatingActionButton;

importandroid.support.design.widget.NavigationView;

importandroid.support.design.widget.Snackbar;

importandroid.support.v4.view.GravityCompat;

importandroid.support.v4.widget.DrawerLayout;

importandroid.support.v7.app.ActionBar;

importandroid.support.v7.app.AppCompatActivity;

importandroid.os.Bundle;

importandroid.support.v7.widget.GridLayoutManager;

importandroid.support.v7.widget.LinearLayoutManager;

importandroid.support.v7.widget.RecyclerView;

importandroid.support.v7.widget.Toolbar;

importandroid.util.Log;

importandroid.view.Menu;

importandroid.view.MenuItem;

importandroid.view.View;

importandroid.widget.Toast;

importcom.android.volley.VolleyError;

importcom.android.volley.toolbox.StringRequest;

importcom.android.volley.toolbox.Volley;

importcom.google.gson.Gson;

importorg.json.JSONException;

importjava.util.ArrayList;

importokhttp3.OkHttpClient;

importokhttp3.Request;

importokhttp3.Response;

public classMainActivityextendsAppCompatActivity {

privateFruitAdapterfruitAdapter;

privateDrawerLayoutmDrawerLayout;

public static  final intNEWS_DATA=1;

privateRecyclerViewrecyclerView;

privateStringurl="http://v.juhe.cn/toutiao/index?type=top&key=";

privateHandlerhandler=newHandler(){

@Override

public voidhandleMessage(Message msg) {

switch(msg.what){

caseNEWS_DATA:

recyclerView.setAdapter(fruitAdapter);

break;

default:

}

}

};

@Override

protected voidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

setSupportActionBar(toolbar);

mDrawerLayout= (DrawerLayout)findViewById(R.id.drawer_layout);

NavigationView navView=(NavigationView)findViewById(R.id.nav_view);

FloatingActionButton fab=(FloatingActionButton)findViewById(R.id.fab);

recyclerView=(RecyclerView)findViewById(R.id.recycler_view);

GridLayoutManager layoutManager =newGridLayoutManager(this,2);

layoutManager.setOrientation(LinearLayoutManager.VERTICAL);

recyclerView.setLayoutManager(layoutManager);

fab.setOnClickListener(newView.OnClickListener() {

@Override

public voidonClick(View v) {

Snackbar.make(v,"Data deleted",Snackbar.LENGTH_SHORT).setAction(

"Undo", newView.OnClickListener() {

@Override

public voidonClick(View v) {

Toast.makeText(MainActivity.this,"sdf",Toast.LENGTH_SHORT).show();

}

}).show();

}

});

ActionBar actionBar = getSupportActionBar();

if(actionBar !=null){

actionBar.setDisplayHomeAsUpEnabled(true);

actionBar.setHomeAsUpIndicator(R.drawable.ic_menu);

}

navView.setCheckedItem(R.id.nav_call);

navView.setNavigationItemSelectedListener(newNavigationView.OnNavigationItemSelectedListener() {

@Override

public booleanonNavigationItemSelected(@NonNullMenuItem item) {

mDrawerLayout.closeDrawers();

return true;

}

});

getData();

}

@Override

public booleanonCreateOptionsMenu(Menu menu) {

getMenuInflater().inflate(R.menu.toolbar,menu);

return true;

}

@Override

public booleanonOptionsItemSelected(MenuItem item) {

switch(item.getItemId()){

caseandroid.R.id.home:

mDrawerLayout.openDrawer(GravityCompat.START);

break;

caseR.id.backup:

Toast.makeText(this,"sdf",Toast.LENGTH_SHORT).show();

break;

caseR.id.delete:

Toast.makeText(this,"sdf",Toast.LENGTH_SHORT).show();

break;

caseR.id.settings:

Toast.makeText(this,"sdf",Toast.LENGTH_SHORT).show();

break;

default:

}

return true;

}

private voidgetData() {

newThread(newRunnable() {

@Override

public voidrun() {

try{

OkHttpClient client =newOkHttpClient();

Request request =newRequest.Builder().url(url).build();

Response response = client.newCall(request).execute();

String responseData = response.body().string();

showResponse(responseData);

}catch(Exception e){

e.printStackTrace();

}

}

}).start();

}

private voidshowResponse(String responseData)throwsJSONException {

Gson gson =newGson();

Bean bean = gson.fromJson(responseData,Bean.class);

ArrayList dataBeen = (ArrayList) bean.getResult().getData();

fruitAdapter=newFruitAdapter(dataBeen);

GridLayoutManager layoutManager =newGridLayoutManager(this,2);

layoutManager.setOrientation(LinearLayoutManager.VERTICAL);

recyclerView.setLayoutManager(layoutManager);

Message message =newMessage();

message.what=NEWS_DATA;

handler.sendMessage(message);

}

}

之前我百度了，我以为是需要我开线程，所以我就用了Handler 结果发现还是存在这个异常。

然后我就把

GridLayoutManager layoutManager =newGridLayoutManager(this,2);

layoutManager.setOrientation(LinearLayoutManager.VERTICAL);

recyclerView.setLayoutManager(layoutManager);

这三句话提到了前面也就是我初始化控件的那里

protected voidonCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.activity_main);

Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

setSupportActionBar(toolbar);

mDrawerLayout= (DrawerLayout)findViewById(R.id.drawer_layout);

NavigationView navView=(NavigationView)findViewById(R.id.nav_view);

FloatingActionButton fab=(FloatingActionButton)findViewById(R.id.fab);

recyclerView=(RecyclerView)findViewById(R.id.recycler_view);

GridLayoutManager layoutManager =newGridLayoutManager(this,2);

layoutManager.setOrientation(LinearLayoutManager.VERTICAL);

recyclerView.setLayoutManager(layoutManager);

。。。。。。。。。。。。后背省略。最后成功显示了。