cannot convert from android.app.FragmentManager to android.support.v4.app.FragmentManager

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I am creating an app using Fragments for tablet.I have so far created some buttons on the left side and the fragments appear on clicking the buttons.

But i am experiencing error in my MainActivity.java file "Type mismatch error:cannot convert fromandroid.app.FragmentManager toandroid.support.v4.app.FragmentManager" And that is the main reason that i cannot implement it.I have already importedandroid.support.v4.app.FragmentManager.

How can i resolve my problem?

My code for MainActivity.java

<code><span class="pln">      </span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">Activity</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">os</span><span class="pun">.</span><span class="typ">Bundle</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">support</span><span class="pun">.</span><span class="pln">v4</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">Fragment</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">support</span><span class="pun">.</span><span class="pln">v4</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">FragmentManager</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">support</span><span class="pun">.</span><span class="pln">v4</span><span class="pun">.</span><span class="pln">app</span><span class="pun">.</span><span class="typ">FragmentTransaction</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">view</span><span class="pun">.</span><span class="typ">View</span><span class="pun">;</span><span class="pln"></span><span class="kwd">import</span><span class="pln"> android</span><span class="pun">.</span><span class="pln">widget</span><span class="pun">.</span><span class="typ">Button</span><span class="pun">;</span><span class="pln"></span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">class</span><span class="pln"> </span><span class="typ">MainActivity</span><span class="pln"> </span><span class="kwd">extends</span><span class="pln"> </span><span class="typ">Activity</span><span class="pln"> </span><span class="pun">{</span><span class="pln">    </span><span class="typ">Fragment</span><span class="pln"> fragment</span><span class="pun">;</span><span class="pln">    </span><span class="typ">Button</span><span class="pln"> btn1</span><span class="pun">,</span><span class="pln">btn2</span><span class="pun">,</span><span class="pln">btn3</span><span class="pun">,</span><span class="pln">btn4</span><span class="pun">,</span><span class="pln">btn5</span><span class="pun">,</span><span class="pln">btn6</span><span class="pun">;</span><span class="pln">    </span><span class="lit">@Override</span><span class="pln">    </span><span class="kwd">protected</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onCreate</span><span class="pun">(</span><span class="typ">Bundle</span><span class="pln"> savedInstanceState</span><span class="pun">)</span><span class="pln"> </span><span class="pun">{</span><span class="pln">        </span><span class="kwd">super</span><span class="pun">.</span><span class="pln">onCreate</span><span class="pun">(</span><span class="pln">savedInstanceState</span><span class="pun">);</span><span class="pln">        setContentView</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">layout</span><span class="pun">.</span><span class="pln">activity_main</span><span class="pun">);</span><span class="pln">        btn1</span><span class="pun">=(</span><span class="typ">Button</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">btn1</span><span class="pun">);</span><span class="pln">        btn2</span><span class="pun">=(</span><span class="typ">Button</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">btn2</span><span class="pun">);</span><span class="pln">        btn3</span><span class="pun">=(</span><span class="typ">Button</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">btn3</span><span class="pun">);</span><span class="pln">        btn4</span><span class="pun">=(</span><span class="typ">Button</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">btn4</span><span class="pun">);</span><span class="pln">        btn5</span><span class="pun">=(</span><span class="typ">Button</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">btn5</span><span class="pun">);</span><span class="pln">        btn6</span><span class="pun">=(</span><span class="typ">Button</span><span class="pun">)</span><span class="pln">findViewById</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">btn6</span><span class="pun">);</span><span class="pln">        </span><span class="typ">FragmentManager</span><span class="pln"> fm</span><span class="pun">=</span><span class="pln">getFragmentManager</span><span class="pun">();</span><span class="pln">        </span><span class="typ">FragmentTransaction</span><span class="pln"> ft</span><span class="pun">=</span><span class="pln">fm</span><span class="pun">.</span><span class="pln">beginTransaction</span><span class="pun">();</span><span class="pln">        </span><span class="typ">StartFragment</span><span class="pln"> myfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">StartFragment</span><span class="pun">();</span><span class="pln">        ft</span><span class="pun">.</span><span class="pln">add</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">myfragment</span><span class="pun">,</span><span class="pln">myfragment</span><span class="pun">);</span><span class="pln">        ft</span><span class="pun">.</span><span class="pln">commit</span><span class="pun">();</span><span class="pln">        btn4</span><span class="pun">.</span><span class="pln">setOnClickListener</span><span class="pun">(</span><span class="pln">btnOnClickListener</span><span class="pun">);</span><span class="pln">        btn5</span><span class="pun">.</span><span class="pln">setOnClickListener</span><span class="pun">(</span><span class="pln">btnOnClickListener</span><span class="pun">);</span><span class="pln">        btn6</span><span class="pun">.</span><span class="pln">setOnClickListener</span><span class="pun">(</span><span class="pln">btnOnClickListener</span><span class="pun">);</span><span class="pln">    </span><span class="pun">}</span><span class="pln">        </span><span class="typ">Button</span><span class="pun">.</span><span class="typ">OnClickListener</span><span class="pln"> btnOnClickListener</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Button</span><span class="pun">.</span><span class="typ">OnClickListener</span><span class="pun">(){</span><span class="pln">            </span><span class="lit">@Override</span><span class="pln">            </span><span class="kwd">public</span><span class="pln"> </span><span class="kwd">void</span><span class="pln"> onClick</span><span class="pun">(</span><span class="typ">View</span><span class="pln"> v</span><span class="pun">)</span><span class="pln">            </span><span class="pun">{</span><span class="pln">                </span><span class="typ">Fragment</span><span class="pln"> newfragment</span><span class="pun">;</span><span class="pln">                </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">v</span><span class="pun">==</span><span class="pln">btn1</span><span class="pun">)</span><span class="pln">                </span><span class="pun">{</span><span class="pln">                    newfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Fragment1</span><span class="pun">();</span><span class="pln">                </span><span class="pun">}</span><span class="pln">                </span><span class="kwd">else</span><span class="pln"> </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">v</span><span class="pun">==</span><span class="pln">btn2</span><span class="pun">)</span><span class="pln">                </span><span class="pun">{</span><span class="pln">                    newfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Fragment2</span><span class="pun">();</span><span class="pln">                </span><span class="pun">}</span><span class="pln">                </span><span class="kwd">else</span><span class="pln"> </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">v</span><span class="pun">==</span><span class="pln">btn3</span><span class="pun">)</span><span class="pln">                </span><span class="pun">{</span><span class="pln">                    newfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Fragment3</span><span class="pun">();</span><span class="pln">                </span><span class="pun">}</span><span class="pln">                </span><span class="kwd">else</span><span class="pln"> </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">v</span><span class="pun">==</span><span class="pln">btn4</span><span class="pun">)</span><span class="pln">                </span><span class="pun">{</span><span class="pln">                    newfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Fragment4</span><span class="pun">();</span><span class="pln">                </span><span class="pun">}</span><span class="pln">                </span><span class="kwd">else</span><span class="pln"> </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">v</span><span class="pun">==</span><span class="pln">btn5</span><span class="pun">)</span><span class="pln">                </span><span class="pun">{</span><span class="pln">                    newfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Fragment5</span><span class="pun">();</span><span class="pln">                </span><span class="pun">}</span><span class="pln">                </span><span class="kwd">else</span><span class="pln"> </span><span class="kwd">if</span><span class="pun">(</span><span class="pln">v</span><span class="pun">==</span><span class="pln">btn6</span><span class="pun">)</span><span class="pln">                </span><span class="pun">{</span><span class="pln">                    newfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">Fragment6</span><span class="pun">();</span><span class="pln">                </span><span class="pun">}</span><span class="pln">                </span><span class="kwd">else</span><span class="pln">                 </span><span class="pun">{</span><span class="pln">                    newfragment</span><span class="pun">=</span><span class="kwd">new</span><span class="pln"> </span><span class="typ">StartFragment</span><span class="pun">();</span><span class="pln">                </span><span class="pun">}</span><span class="pln">                </span><span class="typ">FragmentTransaction</span><span class="pln"> transaction</span><span class="pun">=</span><span class="pln">getFragmentManager</span><span class="pun">.</span><span class="pln">beginTransaction</span><span class="pun">();</span><span class="pln">                transaction</span><span class="pun">.</span><span class="pln">replace</span><span class="pun">(</span><span class="pln">R</span><span class="pun">.</span><span class="pln">id</span><span class="pun">.</span><span class="pln">myfragment</span><span class="pun">,</span><span class="pln">newfragment</span><span class="pun">);</span><span class="pln">                transaction</span><span class="pun">.</span><span class="pln">addToBackStack</span><span class="pun">(</span><span class="kwd">null</span><span class="pun">);</span><span class="pln">                transaction</span><span class="pun">.</span><span class="pln">setTransition</span><span class="pun">(</span><span class="typ">FragmentTransaction</span><span class="pun">.</span><span class="pln">TRANSIT_FRAGMENT_FADE</span><span class="pun">);</span><span class="pln">                transaction</span><span class="pun">.</span><span class="pln">commit</span><span class="pun">();</span><span class="pln">            </span><span class="pun">}</span><span class="pln">        </span><span class="pun">};</span><span class="pln">        </span><span class="pun">}</span></code>

javaandroidandroid-listviewandroid-fragments

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editedMay 22 '13 at 11:26

asked May 22 '13 at 11:16

sakshi
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1 Answer

activeoldestvotes

up vote48down vote accepted

You need to use getSupportFragmentManager() in your code, not getFragmentManager() - see here for more details: http://developer.android.com/reference/android/support/v4/app/FragmentActivity.html#getSupportFragmentManager()

You also need to extend your class from android.support.v4.app.FragmentActivity, not just from standardandroid.Activity to get this method.