android - 搞不懂安卓开发的版本和jar包问题！！-PHP Chinese Network Q&A

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

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.example.flipfree"
    android:versionCode="1"
    android:versionName="1.0" >

    <uses-sdk
        android:minSdkVersion="11"
        android:targetSdkVersion="17" />

    <application
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/title_activity_main" >
        </activity>
    </application>

</manifest>

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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