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POError in PageAdapter and Fragment Activity for Tabs
 

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    <p>I am making tabs for my dashboard.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="match_parent" android:layout_height="match_parent" android:orientation="vertical" android:background="#ffffff"&gt; &lt;TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/WELCOME" android:textSize="40dip" android:gravity="center" android:layout_marginTop="20dip"/&gt; &lt;TextView android:layout_width="fill_parent" android:layout_height="wrap_content" android:id="@+id/emailTextView"/&gt; &lt;Button android:layout_width="fill_parent" android:layout_height="wrap_content" android:text="@string/Logout_Me" android:textSize="20dip" android:textColor="#21dbd4" android:textStyle="bold" android:id="@+id/btnLogout" android:layout_marginTop="80dip" android:background="@null"/&gt; &lt;RelativeLayout android:layout_width="match_parent" android:layout_height="match_parent" &gt; &lt;android.support.v4.view.ViewPager android:id="@+id/pager" android:layout_width="fill_parent" android:layout_height="wrap_content" &gt; &lt;/android.support.v4.view.ViewPager&gt; &lt;/RelativeLayout&gt; </code></pre> <p>But I constantly get errors in these two java files: TabsViewPagerFragmentActivity.java</p> <pre><code>package com.example.loginandregistration; IMPORTS public class TabsViewPagerFragmentActivity extends FragmentActivity { // Declare Variables ActionBar mActionBar; ViewPager mPager; Tab tab; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Get the view from dashboard.xml setContentView(R.layout.dashboard); // Activate Navigation Mode Tabs mActionBar = getActionBar(); mActionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS); // Locate ViewPager in activity_main.xml mPager = (ViewPager) findViewById(R.id.pager); // Activate Fragment Manager FragmentManager fm = getFragmentManager(); // Capture ViewPager page swipes ViewPager.SimpleOnPageChangeListener ViewPagerListener = new ViewPager.SimpleOnPageChangeListener() { @Override public void onPageSelected(int position) { super.onPageSelected(position); // Find the ViewPager Position mActionBar.setSelectedNavigationItem(position); } }; mPager.setOnPageChangeListener(ViewPagerListener); // Locate the adapter class called ViewPagerAdapter.java MyPageAdapter viewpageradapter = new MyPageAdapter(fm); // Set the View Pager Adapter into ViewPager mPager.setAdapter(viewpageradapter); // Capture tab button clicks ActionBar.TabListener tabListener = new ActionBar.TabListener() { @Override public void onTabSelected(Tab tab, FragmentTransaction ft) { // Pass the position on tab click to ViewPager mPager.setCurrentItem(tab.getPosition()); } @Override public void onTabUnselected(Tab tab, FragmentTransaction ft) { // TODO Auto-generated method stub } @Override public void onTabReselected(Tab tab, FragmentTransaction ft) { // TODO Auto-generated method stub } }; // Create first Tab tab = mActionBar.newTab().setText("Tab1").setTabListener(tabListener); mActionBar.addTab(tab); // Create second Tab tab = mActionBar.newTab().setText("Tab2").setTabListener(tabListener); mActionBar.addTab(tab); // Create third Tab tab = mActionBar.newTab().setText("Tab3").setTabListener(tabListener); mActionBar.addTab(tab); } } </code></pre> <p>(On lines 46: </p> <pre><code>MyPageAdapter viewpageradapter = new MyPageAdapter(fm); </code></pre> <p>With the error:</p> <pre><code>The constructor MyPageAdapter(FragmentManager) is undefined TabsViewPagerFragmentActivity.java /LoginAndRegistration/src/com/example/loginandregistration line 46 Java Problem </code></pre> <p>But whenever I add a constructor, I get another error, which makes a continuous error loop)</p> <p>And MyPageAdapter:</p> <pre><code>package com.example.loginandregistration; import android.app.Fragment; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; public class MyPageAdapter extends FragmentPagerAdapter { // Declare the number of ViewPager pages final int PAGE_COUNT = 3; public MyPageAdapter(FragmentManager fm) { super(fm); } @Override public Fragment getItem(int arg0) { switch (arg0) { // Open FragmentTab1.java case 0: FragmentTab1 fragmenttab1 = new FragmentTab1(); return fragmenttab1; // Open FragmentTab2.java case 1: FragmentTab2 fragmenttab2 = new FragmentTab2(); return fragmenttab2; // Open FragmentTab3.java case 2: FragmentTab3 fragmenttab3 = new FragmentTab3(); return fragmenttab3; } return null; } @Override public int getCount() { // TODO Auto-generated method stub return PAGE_COUNT; } } </code></pre> <p>(Errors on lines: 18</p> <pre><code>public Fragment getItem(int arg0) { </code></pre> <p>23</p> <pre><code>FragmentTab1 fragmenttab1 = new FragmentTab1(); </code></pre> <p>28</p> <pre><code>FragmentTab2 fragmenttab2 = new FragmentTab2(); </code></pre> <p>33</p> <pre><code> FragmentTab3 fragmenttab3 = new FragmentTab3(); </code></pre> <p>With line 18, it says the return type is invalid and says to change it to "(Fragment)" With lines 23,28,33, it says that the FragmentTabs cannot be resolved to a type but when I put the classes that I want as the FragmentTabs (As shown below:</p> <pre><code> // Open FragmentTab1.java case 0: CreatePic createpic = new CreatePic(); return createpic; </code></pre> <p>) I get errors that say "CreatePic" is undentified and that the return is wrong (when I click the quickfix, it creates a loop of errors)</p> <p>How can I fix this? </p> <p>ADDED CREATEPIC.JAVA (Top):</p> <pre><code>package com.example.loginandregistration; IMPORTS public class CreatePic extends View { //drawing path private Path drawPath; //drawing and canvas paint private Paint drawPaint, canvasPaint; //initial color private int paintColor = 0xFF660000, paintAlpha = 255; //canvas private Canvas drawCanvas; //canvas bitmap private Bitmap canvasBitmap; //brush sizes private float brushSize, lastBrushSize; //erase flag private boolean erase=false; public CreatePic(Context context, AttributeSet attrs){ super(context, attrs); setupDrawing(); } //setup drawing private void setupDrawing(){ //prepare for drawing and setup paint stroke properties brushSize = getResources().getInteger(R.integer.medium_size); lastBrushSize = brushSize; drawPath = new Path(); drawPaint = new Paint(); drawPaint.setColor(paintColor); drawPaint.setAntiAlias(true); drawPaint.setStrokeWidth(brushSize); drawPaint.setStyle(Paint.Style.STROKE); drawPaint.setStrokeJoin(Paint.Join.ROUND); drawPaint.setStrokeCap(Paint.Cap.ROUND); canvasPaint = new Paint(Paint.DITHER_FLAG); } //size assigned to view @Override protected void onSizeChanged(int w, int h, int oldw, int oldh) { super.onSizeChanged(w, h, oldw, oldh); canvasBitmap = Bitmap.createBitmap(w, h, Bitmap.Config.ARGB_8888); drawCanvas = new Canvas(canvasBitmap); } //draw the view - will be called after touch event @Override protected void onDraw(Canvas canvas) { canvas.drawBitmap(canvasBitmap, 0, 0, canvasPaint); canvas.drawPath(drawPath, drawPaint); } </code></pre>
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    1. USuser1628978
    1. USuser1628978
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    1. COJust a simple question, are you using the Android Support Library v4 ? Because there is Fragments and FragmentsV4 but they are not the same :/
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      1. USKyu_
    2. CODo you definitely have the imports - import android.support.v4.app.Fragment; import android.support.v4.app.FragmentActivity; import android.support.v4.app.FragmentManager; import android.support.v4.app.FragmentPagerAdapter; import android.support.v4.content.LocalBroadcastManager; import android.support.v4.view.ViewPager; in your TabsViewPagerFragmentActivity class?
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      1. POError in PageAdapter and Fragment Activity for Tabs
      1. USo0rebelious0o
    3. COAnd are you sure that the public class MyPageAdapter is either defined WITHIN the TabsViewPagerFragmentActivity class or imported correctly?
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      1. POError in PageAdapter and Fragment Activity for Tabs
      1. USo0rebelious0o
 

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