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://.com/q/1010000004093236?_ea=487504
最后：怎么关闭问题？
androidstudio 一键开发，你还等啥
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)