Android11.7z

package com.example.myapplication11; import android.widget.ImageView; import android.widget.TextView; import androidx.annotation.NonNull; import androidx.annotation.Nullable; import androidx.appcompat.app.AppCompatActivity; import androidx.fragment.app.Fragment; import androidx.fragment.app.FragmentPagerAdapter; import androidx.viewpager.widget.ViewPager; import java.util.ArrayList; public class WelcomeActivity extends AppCompatActivity { private ImageView point1; private ImageView point2; private ImageView point3; private ImageView point4; private TextView enter; private TextView skip; @Override protected void onCreate(@Nullable Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_welcome); point1 = findViewById(R.id.point1); point2 = findViewById(R.id.point2); point3 = findViewById(R.id.point3); point4 = findViewById(R.id.point4); final ArrayList<WelcomeFragment> fragments = new ArrayList<>(); fragments.add(WelcomeFragment.newInstance(R.drawable.p01)); fragments.add(WelcomeFragment.newInstance(R.drawable.p02)); fragments.add(WelcomeFragment.newInstance(R.drawable.p03)); fragments.add(WelcomeFragment.newInstance(R.drawable.p04)); ViewPager viewPager = findViewById(R.id.viewpager); viewPager.setAdapter(new FragmentPagerAdapter(getSupportFragmentManager()) { @Override public int getCount() { return 0; } @NonNull @Override public Fragment getItem(int position) { return null; } @Override public Fragment getItem(int return fragments.get(position){ } @Override public int getCount() { return fragments.size(); } }); viewPager.addOnPageChangeListener (new ViewPager.OnPageChangeListener() { @Override public void onPageScrolled(int position, float positionOffset, int positionOffsetPixels) { } @Override public void onPageSelected(int position) { select(position); } @Override public void onPageScrollStateChanged(int state) { } position) { } }); skip = findViewById(R.id.tvSkip); skip.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { enter(); } }); enter = findViewById(R.id.tvEnter); enter.setOnClickListener(new View.OnClickListener() { @Override public void onClick(View v) { enter(); } }); } private void enter() { startActivity(new Intent(this, MainActivity.class)); finish(); } private void select(int position) { 13 reset(); switch (position) { case 0: point1.setImageResource (R.drawable.point_select); break; case 1: point2.setImageResource (R.drawable.point_select); break; case 2: point3.setImageResource (R.drawable.point_select); break; case 3: point4.setImageResource (R.drawable.point_select); break; default: break; } enter.setVisibility(position == 3 ? View.VISIBLE : View.GONE); skip.setVisibility(position == 3 ? View.GONE : View.VISIBLE); } private void reset() { point1.setImageResource (R.drawable.point_normal); point2.setImageResource (R.drawable.point_normal); point3.setImageResource (R.drawable.point_normal); point4.setImageResource (R.drawable.point_normal); } }