2
public class Menu extends ListActivity {
private String mstring[] = { "MainActivity", "Activity2", "Activity3",
"Activity4" };
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setListAdapter(new ArrayAdapter<String>(Menu.this, android.R.layout.simple_list_item_1, mstring));
}
@Override
public void onListItemClick(ListView l, View v, int position, long id) {
// TODO Auto-generated method stub
super.onListItemClick(l, v, position, id);
String positn = mstring[position];
try {
Class ourclass = Class.forName("com.example.list" + positn);
Intent inten = new Intent(Menu.this, ourclass);
startActivity(inten);
} catch (ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
我想從列表視圖開始活動，但這不起作用，它將如何啓動列表項目單擊活動。在列表視圖中開始活動
這裏是logcat的：
04-12 13:32:27.728: W/System.err(15518): java.lang.ClassNotFoundException: com.example.apaooo.MainActivity
04-12 13:32:27.728: W/System.err(15518): at java.lang.Class.classForName(Native Method)
04-12 13:32:27.728: W/System.err(15518): at java.lang.Class.forName(Class.java:204)
04-12 13:32:27.728: W/System.err(15518): at java.lang.Class.forName(Class.java:169)
04-12 13:32:27.728: W/System.err(15518): at com.example.appaooo.Menu.onListItemClick(Menu.java:29)
04-12 13:32:27.738: W/System.err(15518): at android.app.ListActivity$2.onItemClick(ListActivity.java:319)
04-12 13:32:27.738: W/System.err(15518): at android.widget.AdapterView.performItemClick(AdapterView.java:298)
04-12 13:32:27.738: W/System.err(15518): at android.widget.AbsListView.performItemClick(AbsListView.java:1104)
04-12 13:32:27.738: W/System.err(15518): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2792)
04-12 13:32:27.738: W/System.err(15518): at android.widget.AbsListView$1.run(AbsListView.java:3468)
04-12 13:32:27.738: W/System.err(15518): at android.os.Handler.handleCallback(Handler.java:730)
04-12 13:32:27.738: W/System.err(15518): at android.os.Handler.dispatchMessage(Handler.java:92)
04-12 13:32:27.738: W/System.err(15518): at android.os.Looper.loop(Looper.java:213)
04-12 13:32:27.738: W/System.err(15518): at android.app.ActivityThread.main(ActivityThread.java:5225)
04-12 13:32:27.738: W/System.err(15518): at java.lang.reflect.Method.invokeNative(Native Method)
04-12 13:32:27.738: W/System.err(15518): at java.lang.reflect.Method.invoke(Method.java:525)
04-12 13:32:27.738: W/System.err(15518): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:741)
04-12 13:32:27.738: W/System.err(15518): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:557)
04-12 13:32:27.738: W/System.err(15518): at dalvik.system.NativeStart.main(Native Method)
04-12 13:32:27.738: W/System.err(15518): Caused by: java.lang.NoClassDefFoundError: com/example/apaooo/MainActivity
04-12 13:32:27.748: W/System.err(15518): ... 18 more
04-12 13:32:27.748: W/System.err(15518): Caused by: java.lang.ClassNotFoundException: Didn't find class "com.example.apaooo.MainActivity" on path: DexPathList[[zip file "/data/app/com.example.appaooo-2.apk"],nativeLibraryDirectories=[/data/app-lib/com.example.appaooo-2, /vendor/lib, /system/lib]]
04-12 13:32:27.748: W/System.err(15518): at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:53)
04-12 13:32:27.748: W/System.err(15518): at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
04-12 13:32:27.748: W/System.err(15518): at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
04-12 13:32:27.748: W/System.err(15518): ... 18 more
MianActivity.java
package com.example.appaooo;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class MainActivity extends Activity {
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
final Context context = this;
btn = (Button) findViewById(R.id.btnGeo);
btn.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
Intent intent = new Intent(context, WebViewActivity.class);
startActivity(intent);
}
});
}
}
清單文件是在這裏
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.appaooo"
android:versionCode="1"
android:versionName="1.0" >
<uses-permission android:name="android.permission.INTERNET" />
<uses-sdk
android:minSdkVersion="8"
android:targetSdkVersion="18" />
<application
android:allowBackup="true"
android:icon="@drawable/ic_launcher"
android:label="@string/app_name"
android:theme="@style/AppTheme" >
<activity
android:theme="@style/customTheme"
android:name="com.example.appaooo.Menu"
android:screenOrientation="portrait"
android:label="@string/app_name"
>
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name="com.example.appaooo.MainActivity"
android:label="@string/app_name" ></activity>
</application>
首先我試圖啓動的主要活動僅
請檢查您的活動名稱 –
活動名稱是TURE – user3468384
@ user3468384無論是包名是在清單或在MainActivity包名稱不匹配的一個清單中不同。所以檢查並修復它。它會工作。你還沒有發佈清單和活動代碼與進口 – Raghunandan