android - 搞不懂安卓开发的版本和jar包问题！！-PHP中文網路問答

android的界面开发真是难得一哔————————，我越来越搞不懂它了，只要版本不对就什么都运行不了OTZ。有时候又会不知情况地R文件生成不了了，听说是ADT版本的问题，更新了一下，貌似行了，之后又继续出问题了，一时候这个The following classes could not be found，一时候又建不了activity。之后百度了好多下，发现好像是appcompat的问题，我就手贱把它删了，删了！之后每次运行都报错，程序根本运不出来。本人是小白，发现了android开发的众多规矩之后更白了。
所以来这请教各位大侠，看看我这到底出了什么问题（P.S.程序中是没有明显错误的)，谢谢！！！！

12-02 08:26:10.114: D/AndroidRuntime(859): Shutting down VM 12-02 08:26:10.114: W/dalvikvm(859): threadid=1: thread exiting with uncaught exception (group=0x40a71930) 12-02 08:26:10.194: E/AndroidRuntime(859): FATAL EXCEPTION: main 12-02 08:26:10.194: E/AndroidRuntime(859): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.flipfree/com.example.flipfree.MainActivity}: java.lang.ClassCastException: com.example.flipfree.MainActivity@40cd04a0 must implement OnFragmentInteractionListener 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2180) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2230) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.ActivityThread.access$600(ActivityThread.java:141) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1234) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.os.Handler.dispatchMessage(Handler.java:99) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.os.Looper.loop(Looper.java:137) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.ActivityThread.main(ActivityThread.java:5041) 12-02 08:26:10.194: E/AndroidRuntime(859): at java.lang.reflect.Method.invokeNative(Native Method) 12-02 08:26:10.194: E/AndroidRuntime(859): at java.lang.reflect.Method.invoke(Method.java:511) 12-02 08:26:10.194: E/AndroidRuntime(859): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:793) 12-02 08:26:10.194: E/AndroidRuntime(859): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:560) 12-02 08:26:10.194: E/AndroidRuntime(859): at dalvik.system.NativeStart.main(Native Method) 12-02 08:26:10.194: E/AndroidRuntime(859): Caused by: java.lang.ClassCastException: com.example.flipfree.MainActivity@40cd04a0 must implement OnFragmentInteractionListener 12-02 08:26:10.194: E/AndroidRuntime(859): at com.example.flipfree.SearchPage.onAttach(SearchPage.java:83) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:844) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.FragmentManagerImpl.moveToState(FragmentManager.java:1057) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.BackStackRecord.run(BackStackRecord.java:682) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.FragmentManagerImpl.execPendingActions(FragmentManager.java:1435) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.Activity.performStart(Activity.java:5113) 12-02 08:26:10.194: E/AndroidRuntime(859): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2153) 12-02 08:26:10.194: E/AndroidRuntime(859): ... 11 more 12-02 08:26:35.334: I/Process(859): Sending signal. PID: 859 SIG: 9

运行程序之后就unfortunately了，顺便贴一下AndroidManifest.xml

还有一些界面的class用不了

MainActivity.java

package com.example.flipfree; import android.app.Activity; import android.app.FragmentManager; import android.app.FragmentTransaction; import android.os.Bundle; import android.view.Menu; import android.view.MenuItem; import android.view.View; import android.view.View.OnClickListener; import android.view.Window; import android.widget.ImageButton; import android.widget.LinearLayout; public class MainActivity extends Activity implements OnClickListener { //three tab, each button for each tab private LinearLayout mTabSearch; private LinearLayout mTabCollection; private LinearLayout mTabSetting; //three buttons private ImageButton mSearchBtn; private ImageButton mCollectionBtn; private ImageButton mSettingBtn; private SearchPage searchF; private SettingPage settingF; private CollectionPage collectionF; private FragmentManager fm; @Override protected void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); requestWindowFeature(Window.FEATURE_NO_TITLE); setContentView(R.layout.activity_main); mTabSearch = (LinearLayout) findViewById(R.id.bottom_tab_1); mTabCollection = (LinearLayout) findViewById(R.id.bottom_tab_2); mTabSetting = (LinearLayout) findViewById(R.id.bottom_tab_3); mTabSearch.setOnClickListener(this); mTabCollection.setOnClickListener(this); mTabSetting.setOnClickListener(this); // Set the default fragment that first comes out setDefaultFragment(); } private void setDefaultFragment() { // TODO Auto-generated method stub fm = getFragmentManager(); FragmentTransaction transaction = fm.beginTransaction(); searchF = new SearchPage(); transaction.replace(R.id.id_content, searchF); transaction.commit(); } @Override public boolean onCreateOptionsMenu(Menu menu) { // Inflate the menu; this adds items to the action bar if it is present. getMenuInflater().inflate(R.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 id = item.getItemId(); if (id == R.id.action_settings) { return true; } return super.onOptionsItemSelected(item); } @Override public void onClick(View v) { // TODO Auto-generated method stub fm = getFragmentManager(); // ¿ªÆôFragmentÊÂÎñ FragmentTransaction transaction = fm.beginTransaction(); switch (v.getId()) { case R.id.bottom_tab_1: if (searchF == null) { searchF = new SearchPage(); } transaction.replace(R.id.id_content, searchF); break; case R.id.bottom_tab_2: if (collectionF == null) { collectionF = new CollectionPage(); } transaction.replace(R.id.id_content, collectionF); break; case R.id.bottom_tab_3: if (settingF == null) { settingF = new SettingPage(); } transaction.replace(R.id.id_content, settingF); break; } transaction.commit(); } }

已解决。
不知道是不是原本就是自定义class没有导入，令xml class cannot be found报错而产生的问题，还是我把implements OnClickListener（还是什么鬼）和Fragment里的一堆东西从fragment中移除的原因，反正改了一些代码以及导入了自定义class之后工程就能运行了。http://segmentfault.com/q/1010000004093236?_ea=487504

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