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Android Build a Self-Destructing Message Android App Using Fragments for Tabs Modifying Fragments from the Template

Zachary Zell
Zachary Zell
4,747 Points

Error that closes app

04-09 19:19:18.370 30769-30769/com.example.zachary.ribbitnew E/AndroidRuntime﹕ FATAL EXCEPTION: main Process: com.example.zachary.ribbitnew, PID: 30769 java.lang.RuntimeException: Content has view with id attribute 'android.R.id.list' that is not a ListView class at android.app.ListFragment.ensureList(ListFragment.java:402) at android.app.ListFragment.onViewCreated(ListFragment.java:203) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:908) at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1067) at android.app.BackStackRecord.run(BackStackRecord.java:834) at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1452) at android.app.FragmentManagerImpl.executePendingTransactions(FragmentManager.java:483) at android.support.v13.app.FragmentPagerAdapter.finishUpdate(FragmentPagerAdapter.java:145) at android.support.v4.view.ViewPager.populate(ViewPager.java:1073) at android.support.v4.view.ViewPager.populate(ViewPager.java:919) at android.support.v4.view.ViewPager.onMeasure(ViewPager.java:1441) at android.view.View.measure(View.java:17547) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at android.view.View.measure(View.java:17547) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535) at com.android.internal.widget.ActionBarOverlayLayout.onMeasure(ActionBarOverlayLayout.java:447) at android.view.View.measure(View.java:17547) at android.view.ViewGroup.measureChildWithMargins(ViewGroup.java:5535) at android.widget.FrameLayout.onMeasure(FrameLayout.java:436) at com.android.internal.policy.impl.PhoneWindow$DecorView.onMeasure(PhoneWindow.java:2615) at android.view.View.measure(View.java:17547) at android.view.ViewRootImpl.performMeasure(ViewRootImpl.java:2015) at android.view.ViewRootImpl.measureHierarchy(ViewRootImpl.java:1173) at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1379) at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1061) at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:5885) at android.view.Choreographer$CallbackRecord.run(Choreographer.java:767) at android.view.Choreographer.doCallbacks(Choreographer.java:580) at android.view.Choreographer.doFrame(Choreographer.java:550) at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:753) at android.os.Handler.handleCallback(Handler.java:739) at android.os.Handler.dispatchMessage(Handler.java:95) at android.os.Looper.loop(Looper.java:135) at android.app.ActivityThread.main(ActivityThread.java:5254) at java.lang.reflect.Method.invoke(Native Method) at java.lang.reflect.Method.invoke(Method.java:372) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:903) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:698)

Zachary Zell
Zachary Zell
4,747 Points

package com.example.zachary.ribbitnew;

import java.util.Locale;

import android.app.Activity; import android.app.ActionBar; import android.app.Fragment; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.content.Intent; import android.nfc.Tag; import android.support.v13.app.FragmentPagerAdapter; import android.os.Bundle; import android.support.v4.app.FragmentActivity; import android.support.v4.view.ViewPager; import android.util.Log; import android.view.Gravity; import android.view.LayoutInflater; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.ViewGroup; import android.widget.TextView;

import com.parse.ParseUser;

public class MainActivity extends FragmentActivity implements ActionBar.TabListener {

public static final String TAG = MainActivity.class.getSimpleName();

/**
 * The {@link android.support.v4.view.PagerAdapter} that will provide
 * fragments for each of the sections. We use a
 * {@link FragmentPagerAdapter} derivative, which will keep every
 * loaded fragment in memory. If this becomes too memory intensive, it
 * may be best to switch to a
 * {@link android.support.v13.app.FragmentStatePagerAdapter}.
 */
SectionsPagerAdapter mSectionsPagerAdapter;

/**
 * The {@link ViewPager} that will host the section contents.
 */
ViewPager mViewPager;

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

    ParseUser currentUser = ParseUser.getCurrentUser();

    if (currentUser == null) {
        navigateToLogin();
    } else {
        Log.i(TAG, currentUser.getUsername());
    }

    // Set up the action bar.
    final ActionBar actionBar = getActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the activity.
    mSectionsPagerAdapter = new SectionsPagerAdapter(this, getFragmentManager());


    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    // When swiping between different sections, select the corresponding
    // tab. We can also use ActionBar.Tab#select() to do this if we have
    // a reference to the Tab.
    mViewPager.setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
        @Override
        public void onPageSelected(int position) {
            actionBar.setSelectedNavigationItem(position);
        }
    });

    // For each of the sections in the app, add a tab to the action bar.
    for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
        // Create a tab with text corresponding to the page title defined by
        // the adapter. Also specify this Activity object, which implements
        // the TabListener interface, as the callback (listener) for when
        // this tab is selected.
        actionBar.addTab(
                actionBar.newTab()
                        .setText(mSectionsPagerAdapter.getPageTitle(i))
                        .setTabListener(this));
    }
}

private void navigateToLogin() {
    Intent intent = new Intent(this, LoginActivity.class);
    intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
    intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TASK);
    startActivity(intent);
}


@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.menu_main, 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 itemId = item.getItemId();

    //noinspection SimplifiableIfStatement
    if (itemId == R.id.action_logout) {
        ParseUser.logOut();
        navigateToLogin();
        return true;
    }

    return super.onOptionsItemSelected(item);
}

@Override
public void onTabSelected(ActionBar.Tab tab,
                          FragmentTransaction fragmentTransaction) {
    // When the given tab is selected, switch to the corresponding page in
    // the ViewPager.
    mViewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(ActionBar.Tab tab,
                            FragmentTransaction fragmentTransaction) {
}

@Override
public void onTabReselected(ActionBar.Tab tab,
                            FragmentTransaction fragmentTransaction) {
}

}

Zachary Zell
Zachary Zell
4,747 Points

package com.example.zachary.ribbitnew;

import android.app.Fragment; import android.app.FragmentManager; import android.content.Context; import android.support.v13.app.FragmentPagerAdapter;

import java.util.Locale;

/**

  • Created by Zachary on 4/9/2015. */ public class SectionsPagerAdapter extends FragmentPagerAdapter {

    protected Context mContext;

    public SectionsPagerAdapter(Context context, FragmentManager fm) { super(fm); mContext = context; }

    @Override public Fragment getItem(int position) { // getItem is called to instantiate the fragment for the given page. // Return a PlaceholderFragment (defined as a static inner class below).

    switch (position) {
        case 0:
            return new InboxFragment();
        case 1:
            return new FriendsFragment();
    }
    
    return null;
    

    }

    @Override public int getCount() { // Show 2 total pages. return 2; }

    @Override public CharSequence getPageTitle(int position) { Locale l = Locale.getDefault(); switch (position) { case 0: return mContext.getString(R.string.title_section1).toUpperCase(l); case 1: return mContext.getString(R.string.title_section2).toUpperCase(l); } return null; } }

2 Answers

alex gwartney
alex gwartney
8,849 Points

i had the same issue i fixed it by going into the xml file of the list view make sure you have your id as

@android:id/list

see if that works

thanks! solved my problem!

David Axelrod
David Axelrod
36,073 Points

My app closes automatically too :(