error package android.support.design.widget does not exist

Question

when i try to build my android project i get this errors

Error:(8, 37) error: package android.support.design.widget does not exist Error:(18, 9) error: cannot find symbol class TabLayout Error:(18, 32) error: cannot find symbol class TabLayout Error:(21, 33) error: cannot find symbol variable TabLayout Error:(27, 56) error: package TabLayout does not exist Error:(48, 36) error: cannot find symbol variable menu Error:(28, 57) error: package TabLayout does not exist Error:Execution failed for task ':app:compileDebugJavaWithJavac'.

Compilation failed; see the compiler error output for details. Error:(55, 23) error: cannot find symbol variable action_settings

and this is my code

package com.chaos.creativo;  import android.os.Bundle; import android.support.v4.view.ViewPager; import android.support.v7.app.AppCompatActivity; import android.view.Menu; import android.view.MenuItem; import android.support.design.widget.TabLayout;  /**  * Created by ahmed on 3/7/2016.  */ public class Signin_up extends AppCompatActivity {     @Override     protected void onCreate(Bundle savedInstanceState) {         super.onCreate(savedInstanceState);         setContentView(R.layout.signing_up);         TabLayout tabLayout = (TabLayout) findViewById(R.id.tab_layout);         tabLayout.addTab(tabLayout.newTab().setText("SIGN IN"));         tabLayout.addTab(tabLayout.newTab().setText("SIGN UP"));         tabLayout.setTabGravity(TabLayout.GRAVITY_FILL);          final ViewPager viewPager = (ViewPager) findViewById(R.id.pager);         final PageAdapter adapter = new PageAdapter(getSupportFragmentManager(), tabLayout.getTabCount());          viewPager.setAdapter(adapter);         viewPager.addOnPageChangeListener(new TabLayout.TabLayoutOnPageChangeListener(tabLayout));         tabLayout.setOnTabSelectedListener(new TabLayout.OnTabSelectedListener() {             @Override             public void onTabSelected(TabLayout.Tab tab) {                 viewPager.setCurrentItem(tab.getPosition());             }              @Override             public void onTabUnselected(TabLayout.Tab tab) {              }              @Override             public void onTabReselected(TabLayout.Tab tab) {              }         });     }      @Override     public boolean onCreateOptionsMenu(Menu menu) {         getMenuInflater().inflate(R.menu.menu_main, menu);         return true;     }      @Override     public boolean onOptionsItemSelected(MenuItem item) {         int id = item.getItemId();         if (id == R.id.action_settings) {             return true;         }          return super.onOptionsItemSelected(item);     } } 

my build.gradle

> apply plugin: 'com.android.application' >  > android { >     compileSdkVersion 23 >     buildToolsVersion "23.0.2" >  >     defaultConfig { >         applicationId "com.chaos.creativo" >         minSdkVersion 18 >         targetSdkVersion 23 >         versionCode 1 >         versionName "1.0" >     } >     buildTypes { >         release { >             minifyEnabled false >             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' >         } >     } } >  > dependencies { >     compile fileTree(dir: 'libs', include: ['*.jar']) >     testCompile 'junit:junit:4.12' >     compile 'com.android.support:appcompat-v7:23.1.1' >     compile 'com.google.android.gms:play-services-ads:8.4.0' >     compile 'com.google.android.gms:play-services-identity:8.4.0' >     compile 'com.firebase:firebase-client-android:2.3.1' >     compile 'com.google.android.gms:play-services-gcm:8.4.0' >     compile 'com.android.support:support-v4:23.2' >     compile 'com.android.support:design:23.2' } 

Answer 1

If you are using android studio then put following in gradle file and rebuild.

 compile 'com.android.support:support-v4:23.2.1'  compile 'com.android.support:design:23.2.1' 

If version 23.2.1 won't support, use 23.1.1

Answer 2

Replace

implementation 'com.android.support:support-v4:28.0.0' 

with

implementation 'androidx.legacy:legacy-support-v4:1.0.0' 

in your build.gradle