Question

我只想在我的Android应用中添加recyclerView。添加了recyclerView后，应用程序在启动画面后崩溃。

Splash.java

public class Splash extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_splash);

    new Handler().postDelayed(new Runnable() {
        @Override
        public void run() {
            Intent loginintent = new Intent(Splash.this,Home.class);
            Splash.this.startActivity(loginintent);
            Splash.this.finish();

        }
    },3000);
}

}

Home.java

public class Home extends AppCompatActivity
    implements NavigationView.OnNavigationItemSelectedListener {

private  TabLayout tabLayout;
private  ViewPager viewPager;
private  int[] tabIcons = {
        R.drawable.home,
        R.drawable.faculty };

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_home);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    //private Toolbar toolbar;


    viewPager = (ViewPager) findViewById(R.id.viewpager);
    setupViewPager(viewPager);

    tabLayout = (TabLayout) findViewById(R.id.tabs);
    tabLayout.setupWithViewPager(viewPager);

    FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View view) {
            Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)
                    .setAction("Action", null).show();
        }
    });

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
            this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);
    drawer.setDrawerListener(toggle);
    toggle.syncState();

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);
    navigationView.setNavigationItemSelectedListener(this);

    setupTabIcons();


}

private void setupTabIcons() {
    tabLayout.getTabAt(0).setIcon(tabIcons[0]);
    tabLayout.getTabAt(1).setIcon(tabIcons[1]);
}
private  void setupViewPager(ViewPager viewPager){

    ViewPagerAdapter adapterCustom = new ViewPagerAdapter(getSupportFragmentManager());
    adapterCustom.addFrag(new HomeTab(),"Home");
    adapterCustom.addFrag(new NoticeTab(),"Notice");
    viewPager.setAdapter(adapterCustom);
}


@Override
public void onBackPressed() {
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    if (drawer.isDrawerOpen(GravityCompat.START)) {
        drawer.closeDrawer(GravityCompat.START);
    } else {
        super.onBackPressed();
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.home, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (id == R.id.action_settings) {
        Intent information = new Intent(Home.this,Information.class);
        startActivity(information);
        return true;
    }

    return super.onOptionsItemSelected(item);
}

@SuppressWarnings("StatementWithEmptyBody")
@Override
public boolean onNavigationItemSelected(MenuItem item) {
    // Handle navigation view item clicks here.
    int id = item.getItemId();

    if (id == R.id.home) {
        // Handle the camera action
    } else if (id == R.id.faculty) {

    } else if (id == R.id.intdetail) {

        Intent instDetail = new Intent(Home.this,About.class);
        startActivity(instDetail);

    } else if (id == R.id.nav_manage) {

    } else if (id == R.id.nav_share) {

    } else if (id == R.id.logout) {
        SharedPreferences myPrefs = getSharedPreferences("Activity", MODE_PRIVATE);
        SharedPreferences.Editor editor = myPrefs.edit();
        editor.clear();
        editor.commit();
        AppState.getSingleInstance().setLoggingOut(true);

        //Log.d(TAG, "Now log out and start the activity login");
        Intent intent = new Intent(Home.this, Login.class);
        intent.setFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
        startActivity(intent);
        finish();

    }

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);
    drawer.closeDrawer(GravityCompat.START);
    return true;
}

} 这里我给的是这个应用程序的Logcat

E / lowmemorykiller：编写错误/ proc / 22911 / oom_score_adj; errno = 22 03-12 21：09：45.483 1501-1671 /？

E / InputDispatcher：channel＆＃39; a154656 com.ajoy.gdp / com.ajoy.gdp.Home（server）＆＃39; 〜频道不可挽回地被打破，将被处置！ 03-12 21：09：45.483 1501-671 /？

E / InputDispatcher：channel＆＃39; 26aeadf com.ajoy.gdp / com.ajoy.gdp.Splash（server）＆＃39; 〜频道不可挽回地被打破，将被处置！ 03-12 21：09：45.499 2637-2836 /？ E / WtProcessController：错误pid或pid不存在

Answer 1

试试这个

<?php
    $sql = "SELECT * from students where id =".$id;
    $result = $conn->query($sql);
    $row = $result->fetch_assoc();
?>

<input type="text" name="firstName" id="firstName" value="<?php echo $row['first_name']; ?>">
<input type="text" name="lastName"  id="lastName" value="<?php echo $row['last_name']; ?>">
<input type="text" name="age"  id="age" value="<?php echo $row['age']; ?>">

尝试添加recyclerView

1 个答案: