您好我创建了一个主应用程序，它有一个按钮“savenotes”，点击它应该打开Eclipse IDE中给出的“记事本”示例。这是我做的：
现在奇怪的是，当我在清单中提到“savenotes”活动时，我应该声明我的logcat停止显示日志并让错误设备断开连接。当我删除此活动时，它开始显示日志。但是在这两种情况下，每次我点击我的savenotes按钮时，应用程序力都会关闭。我不确定我做错了什么，我错过了什么。
Mainmenu.java
package helog.diwesh.NugaBest;
import hellog.diwesh.NugaBest.R;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.TimeZone;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.database.Cursor;
import android.graphics.Bitmap;
import android.graphics.Bitmap.CompressFormat;
import android.media.AudioManager;
import android.media.SoundPool;
import android.os.Bundle;
import android.os.Environment;
import android.os.Vibrator;
import android.util.Log;
import android.view.View;
import android.view.Window;
import android.view.animation.AlphaAnimation;
import android.view.animation.Animation;
import android.view.animation.ScaleAnimation;
import android.widget.Button;
import android.widget.Toast;
import com.example.android.notepad.NotesList;
public class NUGA_MainMenuActivity extends Activity {
SoundPool mpool;
int mlogon;
Button mBtn1;
Button mBtn2;
Button mBtn3;
Button mBtn4;
Button mBtn5;
Button mHistoryButton;
Animation anim = null;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
requestWindowFeature(Window.FEATURE_NO_TITLE);
setContentView(R.layout.mainmenu);
mHistoryButton=(Button) findViewById(R.id.takeashot);
mBtn1 = (Button) findViewById(R.id.BtnDisplay);
mBtn2 = (Button) findViewById(R.id.BtnSlave);
mHistoryButton.setOnClickListener(mClickListener);
mBtn3=(Button) findViewById(R.id.takehelp);
mBtn4=(Button) findViewById(R.id.aboutus);
mBtn5=(Button) findViewById(R.id.savenotes);
mBtn1.setOnClickListener(mClickListener);
mBtn2.setOnClickListener(mClickListener);
mBtn3.setOnClickListener(mClickListener);
mBtn4.setOnClickListener(mClickListener);
mBtn5.setOnClickListener(mClickListener);
mpool = new SoundPool(1, AudioManager.STREAM_MUSIC, 0);
mlogon = mpool.load(this, R.raw.logon, 1);
anim = new AlphaAnimation(0, 1);
anim.setDuration(1500);
mBtn1.startAnimation(anim);
mBtn2.startAnimation(anim);
mBtn3.startAnimation(anim);
mBtn4.startAnimation(anim);
mBtn5.startAnimation(anim);
mpool.play(mlogon, 1, 1, 0, 0, 1);
}
Button.OnClickListener mClickListener = new View.OnClickListener() {
Animation anim = null;
@Override
public void onClick(View v) {
Vibrator vibe = (Vibrator) getSystemService(Context.VIBRATOR_SERVICE);
vibe.vibrate(60);
switch (v.getId()) {
case R.id.BtnDisplay:
mpool.play(mlogon, 1, 1, 0, 0, 1);
anim = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
anim.setDuration(100);
mBtn1.startAnimation(anim);
Intent intent = new Intent(NUGA_MainMenuActivity.this, FileSiganlDisplay.class);
startActivity(intent);
//overridePendingTransition(R.anim.zoom_enter,R.anim.zoom_exit);
overridePendingTransition(R.anim.fade, R.anim.hold);
break;
case R.id.BtnSlave:
mpool.play(mlogon, 1, 1, 0, 0, 1);
anim = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
anim.setDuration(100);
mBtn2.startAnimation(anim);
Intent intent1 = new Intent(NUGA_MainMenuActivity.this, BTSmartSlavemodule.class);
startActivity(intent1);
//overridePendingTransition(R.anim.zoom_enter, R.anim.zoom_exit);
overridePendingTransition(R.anim.fade, R.anim.hold);
break ;
case R.id.takeashot:
//snapFunction();
Intent intent2=new Intent(NUGA_MainMenuActivity.this,ImagesActivity.class);
startActivity(intent2);
break;
case R.id.takehelp :
mpool.play(mlogon, 1, 1, 0, 0, 1);
anim = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
anim.setDuration(100);
mBtn3.startAnimation(anim);
Intent intent3=new Intent(NUGA_MainMenuActivity.this,HelpActivity.class);
startActivity(intent3);
overridePendingTransition(R.anim.fade, R.anim.hold);
break;
case R.id.aboutus:
mpool.play(mlogon, 1, 1, 0, 0, 1);
anim = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
anim.setDuration(100);
mBtn4.startAnimation(anim);
Intent intent4=new Intent(NUGA_MainMenuActivity.this,AboutDevice.class);
startActivity(intent4);
overridePendingTransition(R.anim.fade, R.anim.hold);
break;
case R.id.savenotes:
mpool.play(mlogon, 1, 1, 0, 0, 1);
anim = new ScaleAnimation(0, 1, 0, 1, Animation.RELATIVE_TO_SELF, 0.5f, Animation.RELATIVE_TO_SELF, 0.5f);
anim.setDuration(100);
mBtn4.startAnimation(anim);
Intent intent5=new Intent(NUGA_MainMenuActivity.this,NotesList.class);
startActivity(intent5);
overridePendingTransition(R.anim.fade, R.anim.hold);
break;
default:
break;
}
}
};
public void snapFunction()
{
Date currentTime = new Date();
final SimpleDateFormat sdf =
new SimpleDateFormat("yyyy-MM-dd-HH.mm.ss");
// Give it to me in GMT time.
sdf.setTimeZone(TimeZone.getTimeZone("GMT"));
//System.out.println("GMT time: " + sdf.format(currentTime));
String ss=sdf.format(currentTime);
Log.v("current time", ss);
View mContent=findViewById(R.id.screenLayout);
mContent.setDrawingCacheEnabled(true);
Bitmap bitmap = mContent.getDrawingCache();
File sdCardDirectory = Environment.getExternalStorageDirectory();
File image = new File(sdCardDirectory, ss+".jpg");
name=ss;
// File file = new File("/sdcard/"+String.valueOf(currentId)+".png");
{
if(!image.exists())
{
try {
image.createNewFile();
FileOutputStream ostream = new FileOutputStream(image);
bitmap.compress(CompressFormat.PNG, 10, ostream);
ostream.close();
mContent.invalidate();
DB.insert(ss);
Cursor cursor=DB.retrieveFav();
if(cursor!=null)
if(cursor.moveToFirst())
new Toast(NUGA_MainMenuActivity.this).makeText(NUGA_MainMenuActivity.this, "DB contains:"+cursor.getCount()+"images", Toast.LENGTH_LONG).show();
cursor.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
static String name="";
我的清单
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="hellog.diwesh.NugaBest"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="11" />
<uses-permission android:name="android.permission.VIBRATE" />
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.BLUETOOTH_ADMIN" />
<uses-permission android:name="android.permission.BLUETOOTH" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<application
android:name="helog.diwesh.NugaBest.MyApplication"
android:debuggable="true"
android:icon="@drawable/nuga"
android:label="@string/app_name" >
<activity
android:name="helog.diwesh.NugaBest.NUGA_HealthCareActivity_Intro"
android:configChanges="orientation|keyboardHidden"
android:label="@string/app_name" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
// 4. Layout Management
<activity
android:name="helog.diwesh.NugaBest.FileSiganlDisplay"
android:label="FileSiganlDisplay" />
<activity
android:name="helog.diwesh.NugaBest.NUGA_WebJoinActivity"
android:label="NUGA_WebJoinActivity"
android:windowSoftInputMode="stateHidden" />
<activity
android:name="helog.diwesh.NugaBest.NUGA_MainMenuActivity"
android:label="NUGA_MainMenuActivity" />
<activity
android:name="helog.diwesh.NugaBest.BTSmartSlavemodule"
android:configChanges="orientation|keyboardHidden"
android:label="SmartSlavemodule" />
<activity
android:name="helog.diwesh.NugaBest.BTDeviceListActivity"
android:configChanges="orientation|keyboardHidden"
android:label="@string/select_device"
android:theme="@android:style/Theme.Dialog" />
<activity
android:name="helog.diwesh.NugaBest.SnapActivity"
android:label="@string/title_activity_snap" >
</activity>
<activity
android:name="helog.diwesh.NugaBest.ImagesActivity"
android:label="@string/title_activity_images" >
</activity>
<activity
android:name="helog.diwesh.NugaBest.HelpActivity"
android:label="@string/Help" >
</activity>
<activity
android:name="helog.diwesh.NugaBest.AboutDevice"
android:label="@string/aboutus" >
</activity>
<activity
android:name="helog.diwesh.NugaBest.Savenotes"
android:label="@string/savenotes" >
</activity>
</application>
project.properties
# This file is automatically generated by Android Tools.
# Do not modify this file -- YOUR CHANGES WILL BE ERASED!
#
# This file must be checked in Version Control Systems.
#
# To customize properties used by the Ant build system use,
# "ant.properties", and override values to adapt the script to your
# project structure.
# Project target.
target=Google Inc.:Google APIs:18
android.library.reference.1=C:/Users/DPC/Downloads/adt-bundle-windows-x86-20130729/adt-bundle-windows-x86-20130729/sdk/samples/android-18/legacy/NotePad
manifestmerger.enabled=true
NotesList清单
<!-- Declare the contents of this Android application. The namespace
attribute brings in the Android platform namespace, and the package
supplies a unique name for the application. When writing your
own application, the package name must be changed from "com.example.*"
to come from a domain that you own or have control over. -->
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.android.notepad" >
<uses-sdk android:minSdkVersion="11" />
<application android:icon="@drawable/app_notes"
android:label="@string/app_name"
>
<provider android:name="NotePadProvider"
android:authorities="com.google.provider.NotePad"
android:exported="false">
<grant-uri-permission android:pathPattern=".*" />
</provider>
<activity android:name="NotesList" android:label="@string/title_notes_list">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.EDIT" />
<action android:name="android.intent.action.PICK" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.dir/vnd.google.note" />
</intent-filter>
<intent-filter>
<action android:name="android.intent.action.GET_CONTENT" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/vnd.google.note" />
</intent-filter>
</activity>
<activity android:name="NoteEditor"
android:theme="@android:style/Theme.Holo.Light"
android:screenOrientation="sensor"
android:configChanges="keyboardHidden|orientation"
>
<!-- This filter says that we can view or edit the data of
a single note -->
<intent-filter android:label="@string/resolve_edit">
<action android:name="android.intent.action.VIEW" />
<action android:name="android.intent.action.EDIT" />
<action android:name="com.android.notepad.action.EDIT_NOTE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.item/vnd.google.note" />
</intent-filter>
<!-- This filter says that we can create a new note inside
of a directory of notes. The INSERT action creates an
empty note; the PASTE action initializes a new note from
the current contents of the clipboard. -->
<intent-filter>
<action android:name="android.intent.action.INSERT" />
<action android:name="android.intent.action.PASTE" />
<category android:name="android.intent.category.DEFAULT" />
<data android:mimeType="vnd.android.cursor.dir/vnd.google.note" />
</intent-filter>
</activity>
<activity android:name="TitleEditor"
android:label="@string/title_edit_title"
android:icon="@drawable/ic_menu_edit"
android:theme="@android:style/Theme.Holo.Dialog"
android:windowSoftInputMode="stateVisible">
<!-- This activity implements an alternative action that can be
performed on notes: editing their title. It can be used as
a default operation if the user invokes this action, and is
available as an alternative action for any note data. -->
<intent-filter android:label="@string/resolve_title">
<!-- This is the action we perform. It is a custom action we
define for our application, not a generic VIEW or EDIT
action since we are not a general note viewer/editor. -->
<action android:name="com.android.notepad.action.EDIT_TITLE" />
<!-- DEFAULT: execute if being directly invoked. -->
<category android:name="android.intent.category.DEFAULT" />
<!-- ALTERNATIVE: show as an alternative action when the user is
working with this type of data. -->
<category android:name="android.intent.category.ALTERNATIVE" />
<!-- SELECTED_ALTERNATIVE: show as an alternative action the user
can perform when selecting this type of data. -->
<category android:name="android.intent.category.SELECTED_ALTERNATIVE" />
<!-- This is the data type we operate on. -->
<data android:mimeType="vnd.android.cursor.item/vnd.google.note" />
</intent-filter>
</activity>
<activity android:name="NotesLiveFolder" android:label="@string/live_folder_name"
android:icon="@drawable/live_folder_notes">
<intent-filter>
<action android:name="android.intent.action.CREATE_LIVE_FOLDER" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
</activity>
</application>
</manifest>
在清单
中未添加savenotes时的Logcat详细信息09-22 22:07:36.157: D/dalvikvm(799): GC_FOR_ALLOC freed 67K, 7% free 2543K/2728K, paused 87ms, total 88ms
09-22 22:07:36.237: I/dalvikvm-heap(799): Grow heap (frag case) to 4.939MB for 2457616-byte allocation
09-22 22:07:36.367: D/dalvikvm(799): GC_FOR_ALLOC freed <1K, 4% free 4943K/5132K, paused 127ms, total 127ms
09-22 22:07:36.887: W/SoundPool(799): sample 1 not READY
09-22 22:07:37.197: D/gralloc_goldfish(799): Emulator without GPU emulation detected.
09-22 22:07:39.146: E/AudioTrack(799): Could not get audio output for stream type 3
09-22 22:07:39.146: E/SoundPool(799): Error creating AudioTrack
09-22 22:07:39.256: D/dalvikvm(799): GC_FOR_ALLOC freed 28K, 3% free 5673K/5828K, paused 21ms, total 23ms
09-22 22:07:39.336: D/dalvikvm(799): GC_FOR_ALLOC freed 22K, 3% free 6090K/6236K, paused 21ms, total 26ms
09-22 22:07:39.426: I/Choreographer(799): Skipped 72 frames! The application may be doing too much work on its main thread.
09-22 22:07:39.656: I/Choreographer(799): Skipped 54 frames! The application may be doing too much work on its main thread.
09-22 22:07:39.826: I/Choreographer(799): Skipped 33 frames! The application may be doing too much work on its main thread.
09-22 22:07:40.116: I/Choreographer(799): Skipped 56 frames! The application may be doing too much work on its main thread.
09-22 22:07:43.946: E/dalvikvm(799): Could not find class 'com.example.android.notepad.NotesList', referenced from method helog.diwesh.NugaBest.NUGA_MainMenuActivity$1.onClick
09-22 22:07:43.976: W/dalvikvm(799): VFY: unable to resolve const-class 655 (Lcom/example/android/notepad/NotesList;) in Lhelog/diwesh/NugaBest/NUGA_MainMenuActivity$1;
09-22 22:07:43.976: D/dalvikvm(799): VFY: replacing opcode 0x1c at 0x01fe
09-22 22:07:44.186: D/dalvikvm(799): GC_FOR_ALLOC freed 85K, 3% free 6817K/7020K, paused 115ms, total 161ms
09-22 22:07:44.236: I/dalvikvm-heap(799): Grow heap (frag case) to 9.113MB for 2457616-byte allocation
09-22 22:07:44.426: D/dalvikvm(799): GC_FOR_ALLOC freed 2K, 3% free 9215K/9424K, paused 195ms, total 195ms
09-22 22:07:44.726: W/SoundPool(799): sample 1 not READY
09-22 22:07:44.946: I/Choreographer(799): Skipped 43 frames! The application may be doing too much work on its main thread.
09-22 22:07:45.426: I/Choreographer(799): Skipped 49 frames! The application may be doing too much work on its main thread.
09-22 22:07:51.186: E/AudioTrack(799): Could not get audio output for stream type 3
09-22 22:07:51.186: E/SoundPool(799): Error creating AudioTrack
09-22 22:07:51.546: D/dalvikvm(799): GC_FOR_ALLOC freed 46K, 2% free 9476K/9640K, paused 39ms, total 68ms
09-22 22:07:51.596: I/dalvikvm-heap(799): Grow heap (frag case) to 12.317MB for 3094560-byte allocation
09-22 22:07:51.756: D/dalvikvm(799): GC_FOR_ALLOC freed 4220K, 35% free 8277K/12664K, paused 154ms, total 154ms
09-22 22:07:51.977: I/Choreographer(799): Skipped 173 frames! The application may be doing too much work on its main thread.
09-22 22:07:52.106: I/Choreographer(799): Skipped 30 frames! The application may be doing too much work on its main thread.
09-22 22:07:52.476: I/Choreographer(799): Skipped 82 frames! The application may be doing too much work on its main thread.
09-22 22:07:59.586: E/AudioTrack(799): Could not get audio output for stream type 3
09-22 22:07:59.586: E/SoundPool(799): Error creating AudioTrack
09-22 22:07:59.586: D/AndroidRuntime(799): Shutting down VM
09-22 22:07:59.586: W/dalvikvm(799): threadid=1: thread exiting with uncaught exception (group=0x41465700)
09-22 22:07:59.626: E/AndroidRuntime(799): FATAL EXCEPTION: main
09-22 22:07:59.626: E/AndroidRuntime(799): java.lang.NoClassDefFoundError: com.example.android.notepad.NotesList
09-22 22:07:59.626: E/AndroidRuntime(799): at helog.diwesh.NugaBest.NUGA_MainMenuActivity$1.onClick(NUGA_MainMenuActivity.java:152)
09-22 22:07:59.626: E/AndroidRuntime(799): at android.view.View.performClick(View.java:4240)
09-22 22:07:59.626: E/AndroidRuntime(799): at android.view.View$PerformClick.run(View.java:17721)
09-22 22:07:59.626: E/AndroidRuntime(799): at android.os.Handler.handleCallback(Handler.java:730)
09-22 22:07:59.626: E/AndroidRuntime(799): at android.os.Handler.dispatchMessage(Handler.java:92)
09-22 22:07:59.626: E/AndroidRuntime(799): at android.os.Looper.loop(Looper.java:137)
09-22 22:07:59.626: E/AndroidRuntime(799): at android.app.ActivityThread.main(ActivityThread.java:5103)
09-22 22:07:59.626: E/AndroidRuntime(799): at java.lang.reflect.Method.invokeNative(Native Method)
09-22 22:07:59.626: E/AndroidRuntime(799): at java.lang.reflect.Method.invoke(Method.java:525)
09-22 22:07:59.626: E/AndroidRuntime(799): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737)
09-22 22:07:59.626: E/AndroidRuntime(799): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553)
09-22 22:07:59.626: E/AndroidRuntime(799): at dalvik.system.NativeStart.main(Native Method)
答案 0 :(得分：0)
问题是您的应用无法找到库并因异常java.lang.NoClassDefFoundError: com.example.android.notepad.NotesList
要检查的一些事项。
右键单击您的项目和属性。 在“android”选项卡中，您是否在“Library”部分下看到了您的库（NoteList）。
在“Java构建路径”下，您启用了“Android私有库”。 这应该针对两个项目完成。即。为Notelist和您的项目。