问题
I am creating a widget but when I run it I get this error in the console:
[2013-10-05 22:02:56 - AwesomeFileBuilderWidget] ------------------------------
[2013-10-05 22:02:56 - AwesomeFileBuilderWidget] Android Launch!
[2013-10-05 22:02:56 - AwesomeFileBuilderWidget] adb is running normally.
[2013-10-05 22:02:56 - AwesomeFileBuilderWidget] No Launcher activity found!
[2013-10-05 22:02:56 - AwesomeFileBuilderWidget] The launch will only sync the application package on the device!
[2013-10-05 22:02:56 - AwesomeFileBuilderWidget] Performing sync
[2013-10-05 22:02:56 - AwesomeFileBuilderWidget] Automatic Target Mode: Unable to detect device compatibility. Please select a target device.
[2013-10-05 22:03:00 - AwesomeFileBuilderWidget] Uploading AwesomeFileBuilderWidget.apk onto device 'HT18YMA05067'
[2013-10-05 22:03:00 - AwesomeFileBuilderWidget] Installing AwesomeFileBuilderWidget.apk...
[2013-10-05 22:03:04 - AwesomeFileBuilderWidget] Success!
[2013-10-05 22:03:04 - AwesomeFileBuilderWidget] \AwesomeFileBuilderWidget\bin\AwesomeFileBuilderWidget.apk installed on device
[2013-10-05 22:03:04 - AwesomeFileBuilderWidget] Done!
But the widget installs fine on my device and shows up in the Widget selection screen.
The second error occurs when I try to put my widget on the homescreen. I get this error in LogCat:
10-05 21:51:45.485: D/AndroidRuntime(3557): Shutting down VM
10-05 21:51:45.485: W/dalvikvm(3557): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0)
10-05 21:51:45.505: E/AndroidRuntime(3557): FATAL EXCEPTION: main
10-05 21:51:45.505: E/AndroidRuntime(3557): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.awesomefilebuilderwidget/com.example.awesomefilebuilderwidget.WidgetConfig}: java.lang.ClassNotFoundException: com.example.awesomefilebuilderwidget.WidgetConfig in loader dalvik.system.PathClassLoader[/data/app/com.example.awesomefilebuilderwidget-1.apk]
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1746)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.app.ActivityThread.handleLaunchActivity (ActivityThread.java:1854)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.app.ActivityThread.access$1500(ActivityThread.java:135)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1041)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.os.Handler.dispatchMessage(Handler.java:99)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.os.Looper.loop(Looper.java:150)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.app.ActivityThread.main(ActivityThread.java:4333)
10-05 21:51:45.505: E/AndroidRuntime(3557): at java.lang.reflect.Method.invokeNative(Native Method)
10-05 21:51:45.505: E/AndroidRuntime(3557): at java.lang.reflect.Method.invoke(Method.java:507)
10-05 21:51:45.505: E/AndroidRuntime(3557): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-05 21:51:45.505: E/AndroidRuntime(3557): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-05 21:51:45.505: E/AndroidRuntime(3557): at dalvik.system.NativeStart.main(Native Method)
10-05 21:51:45.505: E/AndroidRuntime(3557): Caused by: java.lang.ClassNotFoundException: com.example.awesomefilebuilderwidget.WidgetConfig in loader dalvik.system.PathClassLoader[/data/app/com.example.awesomefilebuilderwidget-1.apk]
10-05 21:51:45.505: E/AndroidRuntime(3557): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
10-05 21:51:45.505: E/AndroidRuntime(3557): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
10-05 21:51:45.505: E/AndroidRuntime(3557): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.app.Instrumentation.newActivity(Instrumentation.java:1040)
10-05 21:51:45.505: E/AndroidRuntime(3557): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1738)
10-05 21:51:45.505: E/AndroidRuntime(3557): ... 11 more
Here is my Manifest:
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.awesomefilebuilderwidget"
android:versionCode="1"
android:versionName="1.0" >
<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" >
<receiver android:name=".AFBWidget" android:label="@string/app_name">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_UPDATE"/>
</intent-filter>
<meta-data android:name="android.appwidget.provider"
android:resource="@xml/widget_stuff"/>
</receiver>
<activity android:name=".WidgetConfig" android:label="@string/app_name">
<intent-filter>
<action android:name="android.appwidget.action.APPWIDGET_CONFIGURE"/>
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<activity android:name=".AFBWidget" android:label="@string/app_name"/>
</application>
</manifest>
I have made sure I have checked all the boxes in the Order and Export section. I have also made sure that my AFBWidget and WidgetConfig classes are in src. (Please note that the actual widget configuration is in the correct xml location, the WidgetConfig.java is something else)
What is the issue?
Updated LogCat:
10-05 22:47:40.628: D/AndroidRuntime(4113): Shutting down VM
10-05 22:47:40.628: W/dalvikvm(4113): threadid=1: thread exiting with uncaught exception (group=0x4001d5a0)
10-05 22:47:40.638: E/AndroidRuntime(4113): FATAL EXCEPTION: main
10-05 22:47:40.638: E/AndroidRuntime(4113): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.example.awesomefilebuilderwidget/com.example.awesomefilebuilderwidget.WidgetConfig}: java.lang.ClassNotFoundException: com.example.awesomefilebuilderwidget.WidgetConfig in loader dalvik.system.PathClassLoader[/data/app/com.example.awesomefilebuilderwidget-1.apk]
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1746)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1854)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.app.ActivityThread.access$1500(ActivityThread.java:135)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1041)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.os.Handler.dispatchMessage(Handler.java:99)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.os.Looper.loop(Looper.java:150)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.app.ActivityThread.main(ActivityThread.java:4333)
10-05 22:47:40.638: E/AndroidRuntime(4113): at java.lang.reflect.Method.invokeNative(Native Method)
10-05 22:47:40.638: E/AndroidRuntime(4113): at java.lang.reflect.Method.invoke(Method.java:507)
10-05 22:47:40.638: E/AndroidRuntime(4113): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:839)
10-05 22:47:40.638: E/AndroidRuntime(4113): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:597)
10-05 22:47:40.638: E/AndroidRuntime(4113): at dalvik.system.NativeStart.main(Native Method)
10-05 22:47:40.638: E/AndroidRuntime(4113): Caused by: java.lang.ClassNotFoundException: com.example.awesomefilebuilderwidget.WidgetConfig in loader dalvik.system.PathClassLoader[/data/app/com.example.awesomefilebuilderwidget-1.apk]
10-05 22:47:40.638: E/AndroidRuntime(4113): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:240)
10-05 22:47:40.638: E/AndroidRuntime(4113): at java.lang.ClassLoader.loadClass(ClassLoader.java:551)
10-05 22:47:40.638: E/AndroidRuntime(4113): at java.lang.ClassLoader.loadClass(ClassLoader.java:511)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.app.Instrumentation.newActivity(Instrumentation.java:1040)
10-05 22:47:40.638: E/AndroidRuntime(4113): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1738)
10-05 22:47:40.638: E/AndroidRuntime(4113): ... 11 more
ADDED CLASSES AND XML FILES: AFBWidget.java:
import java.util.Random;
import com.example.awesomefilebuilderwidget.R;
import android.appwidget.AppWidgetManager;
import android.appwidget.AppWidgetProvider;
import android.content.Context;
import android.widget.RemoteViews;
import android.widget.Toast;
public class AFBWidget extends AppWidgetProvider{
@Override
public void onUpdate(Context context, AppWidgetManager appWidgetManager,
int[] appWidgetIds) {
// TODO Auto-generated method stub
super.onUpdate(context, appWidgetManager, appWidgetIds);
Random r = new Random();
int randomInt = r.nextInt(1000000000);
String rand = String.valueOf(randomInt);
final int N = appWidgetIds.length;
for (int i = 0; i < N; i++){
int awID = appWidgetIds[i];
RemoteViews v = new RemoteViews(context.getPackageName(), R.layout.widget);
v.setTextViewText(R.id.tvwidgetUpdate, rand);
appWidgetManager.updateAppWidget(awID, v);
}
}
WidgetConfig.java:
import android.app.Activity;
import android.app.PendingIntent;
import android.appwidget.AppWidgetManager;
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;
import android.widget.EditText;
import android.widget.RemoteViews;
import com.example.awesomefilebuilderwidget.R;
public class WidgetConfig extends Activity implements OnClickListener{
EditText info;
AppWidgetManager awm;
Context c;
int awID;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.widgetconfig);
Button b = (Button)findViewById(R.id.bwidgetconfig);
b.setOnClickListener(this);
c = WidgetConfig.this;
info = (EditText)findViewById(R.id.etwidgetconfig);
//Getting info about the widget that launched this Activity
Intent i = getIntent();
Bundle extras = i.getExtras();
if (extras != null){
awID = extras.getInt(AppWidgetManager.EXTRA_APPWIDGET_ID,
AppWidgetManager.INVALID_APPWIDGET_ID
);
}else{
finish();
}
awm = AppWidgetManager.getInstance(c);
}
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
String e = info.getText().toString();
RemoteViews views = new RemoteViews(c.getPackageName(), R.layout.widget);
views.setTextViewText(R.id.tvConfigInput, e);
Intent in = new Intent(c, WidgetConfig.class);
PendingIntent pi = PendingIntent.getActivity(c, 0, in, 0);
views.setOnClickPendingIntent(R.id.bwidgetOpen, pi);
awm.updateAppWidget(awID, views);
Intent result = new Intent();
result.putExtra(AppWidgetManager.EXTRA_APPWIDGET_ID, awID);
setResult(RESULT_OK, result);
finish();
}
}
Widget.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<TextView
android:id="@+id/tvConfigInput"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
<Button
android:id="@+id/bwidgetOpen"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="Button" />
<TextView
android:id="@+id/tvwidgetUpdate"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:text="TextView" />
</LinearLayout>
WidgetConfig.xml:
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical" >
<EditText
android:id="@+id/etwidgetconfig"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:ems="10"
android:hint="@string/user_input_application_name">
<requestFocus />
</EditText>
<Button
android:id="@+id/bwidgetconfig"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:text="@string/ok" />
</LinearLayout>
App Widget Provider (app_stuff.xml):
回答1:
I FINALLY FIXED IT AFTER 3 DAYS! Ok, so it was indeed because my two java classes were in a default package. So to fix that, since my classes were being accessed via a different package, I created a new package that was my app (com.example.awesomefilebuilderwidget) and then moved the classes into there and now it works with no problemos! :DD Thanks for all you've done I really do apperciate it! – user1628978
回答2:
try to clean your workspace. Goto Project->Clean and select your project. For some reason eclipse doesn't build manifest automatically.
and also try to clean you server by doing right click and then clean
回答3:
add all activities in src to AndroidManifest.xml.clean and run project then
来源：https://stackoverflow.com/questions/19205341/java-lang-runtimeexception-unable-to-instantiate-activity-componentinfo