1

私はこのすべてのAndroid開発の初心者です。この例外の原因を突き止めようとしています。

    11-09 02:29:39.897: E/AndroidRuntime(657): FATAL EXCEPTION: main
11-09 02:29:39.897: E/AndroidRuntime(657): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.yoursite.arduinoblinkled/com.yoursite.arduinoblinkled.activity_arduino_blink_led}: java.lang.ClassNotFoundException: com.yoursite.arduinoblinkled.activity_arduino_blink_led
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1880)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1981)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.app.ActivityThread.access$600(ActivityThread.java:123)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1147)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.os.Handler.dispatchMessage(Handler.java:99)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.os.Looper.loop(Looper.java:137)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.app.ActivityThread.main(ActivityThread.java:4424)
11-09 02:29:39.897: E/AndroidRuntime(657):  at java.lang.reflect.Method.invokeNative(Native Method)
11-09 02:29:39.897: E/AndroidRuntime(657):  at java.lang.reflect.Method.invoke(Method.java:511)
11-09 02:29:39.897: E/AndroidRuntime(657):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
11-09 02:29:39.897: E/AndroidRuntime(657):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
11-09 02:29:39.897: E/AndroidRuntime(657):  at dalvik.system.NativeStart.main(Native Method)
11-09 02:29:39.897: E/AndroidRuntime(657): Caused by: java.lang.ClassNotFoundException: com.yoursite.arduinoblinkled.activity_arduino_blink_led
11-09 02:29:39.897: E/AndroidRuntime(657):  at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:61)
11-09 02:29:39.897: E/AndroidRuntime(657):  at java.lang.ClassLoader.loadClass(ClassLoader.java:501)
11-09 02:29:39.897: E/AndroidRuntime(657):  at java.lang.ClassLoader.loadClass(ClassLoader.java:461)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.app.Instrumentation.newActivity(Instrumentation.java:1023)
11-09 02:29:39.897: E/AndroidRuntime(657):  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1871)
11-09 02:29:39.897: E/AndroidRuntime(657):  ... 11 more

AndroidManifest.xml

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

     <uses-sdk
        android:minSdkVersion="15"
        android:targetSdkVersion="15" />

    <application android:icon="@drawable/ic_launcher" android:label="@string/app_name">
        <uses-library android:name="com.google.android.maps" />
        <activity android:name=".activity_arduino_blink_led"
            android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED" />
            </intent-filter>
            <meta-data android:name="android.hardware.usb.action.USB_ACCESSORY_ATTACHED"
                android:resource="@xml/device_filter" />
        </activity>

        <uses-library android:name="com.android.future.usb.accessory"></uses-library>

    </application>
</manifest>

ArduinoBlinkLEDActivity.java

package com.example.arduinoblinkled;

import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;


import com.android.future.usb.UsbAccessory;
import com.android.future.usb.UsbManager;
import com.yoursite.arduinoblinkled.R;


import android.os.Bundle;
import android.os.ParcelFileDescriptor;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.util.Log;
import android.view.Menu;
import android.view.View;
import android.widget.ToggleButton;

public class ArduinoBlinkLEDActivity extends Activity {




        private static final String TAG = "ArduinoAccessory";

        private static final String ACTION_USB_PERMISSION = "com.google.android.DemoKit.action.USB_PERMISSION";

        private UsbManager mUsbManager;
        private PendingIntent mPermissionIntent;
        private boolean mPermissionRequestPending;
        private ToggleButton buttonLED;

        UsbAccessory mAccessory;
        ParcelFileDescriptor mFileDescriptor;
        FileInputStream mInputStream;
        FileOutputStream mOutputStream;

        private final BroadcastReceiver mUsbReceiver = new BroadcastReceiver() {
            @Override
            public void onReceive(Context context, Intent intent) {
                String action = intent.getAction();
                if (ACTION_USB_PERMISSION.equals(action)) {
                    synchronized (this) {
                        UsbAccessory accessory = UsbManager.getAccessory(intent);
                        if (intent.getBooleanExtra(
                                UsbManager.EXTRA_PERMISSION_GRANTED, false)) {
                            openAccessory(accessory);
                        } else {
                            Log.d(TAG, "permission denied for accessory "
                                    + accessory);
                        }
                        mPermissionRequestPending = false;
                    }
                } else if (UsbManager.ACTION_USB_ACCESSORY_DETACHED.equals(action)) {
                    UsbAccessory accessory = UsbManager.getAccessory(intent);
                    if (accessory != null && accessory.equals(mAccessory)) {
                        closeAccessory();
                    }
                }
            }
        };


    @SuppressWarnings("deprecation")
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_arduino_blink_led);

        mUsbManager = UsbManager.getInstance(this);
        mPermissionIntent = PendingIntent.getBroadcast(this, 0, new Intent(ACTION_USB_PERMISSION), 0);
        IntentFilter filter = new IntentFilter(ACTION_USB_PERMISSION);
        filter.addAction(UsbManager.ACTION_USB_ACCESSORY_DETACHED);
        registerReceiver(mUsbReceiver, filter);

        if (getLastNonConfigurationInstance() != null) {
            mAccessory = (UsbAccessory) getLastNonConfigurationInstance();
            openAccessory(mAccessory);
        }

        setContentView(R.layout.activity_arduino_blink_led);
        buttonLED = (ToggleButton) findViewById(R.id.toggleButtonLED);
    }

    @SuppressWarnings("deprecation")
    @Override
    public Object onRetainNonConfigurationInstance() {
        if (mAccessory != null) {
            return mAccessory;
        } else {
            return super.onRetainNonConfigurationInstance();
        }
    }

    @Override
    public void onResume() {
        super.onResume();

        if (mInputStream != null && mOutputStream != null) {
            return;
        }

        UsbAccessory[] accessories = mUsbManager.getAccessoryList();
        UsbAccessory accessory = (accessories == null ? null : accessories[0]);
        if (accessory != null) {
            if (mUsbManager.hasPermission(accessory)) {
                openAccessory(accessory);
            } else {
                synchronized (mUsbReceiver) {
                    if (!mPermissionRequestPending) {
                        mUsbManager.requestPermission(accessory,mPermissionIntent);
                        mPermissionRequestPending = true;
                    }
                }
            }
        } else {
            Log.d(TAG, "mAccessory is null");
        }
    }

    private void openAccessory(UsbAccessory accessory) {
        mFileDescriptor = mUsbManager.openAccessory(accessory);
        if (mFileDescriptor != null) {
            mAccessory = accessory;
            FileDescriptor fd = mFileDescriptor.getFileDescriptor();
            mInputStream = new FileInputStream(fd);
            mOutputStream = new FileOutputStream(fd);
            Log.d(TAG, "accessory opened");
        } else {
            Log.d(TAG, "accessory open fail");
        }
    }


    private void closeAccessory() {
        try {
            if (mFileDescriptor != null) {
                mFileDescriptor.close();
            }
        } catch (IOException e) {
        } finally {
            mFileDescriptor = null;
            mAccessory = null;
        }
    }

    public void blinkLED(View v){

        byte[] buffer = new byte[1];

        if(buttonLED.isChecked())
            buffer[0]=(byte)0; // button says on, light is off
        else
            buffer[0]=(byte)1; // button says off, light is on

        if (mOutputStream != null) {
            try {
                mOutputStream.write(buffer);
            } catch (IOException e) {
                Log.e(TAG, "write failed", e);
            }
        }
    }


}

私は多くの解決策を試しましたが、問題はまだ解決されていません。誰かがこれを引き起こしている可能性があることを知っていますか？どうもありがとう。

4

2 に答える 2

2

アクティビティに完全修飾名を使用していないため、上部のパッケージ名をcom.example.arduinoblinkledに変更してください。

また、アクティビティ名を.ArduinoBlinkLEDActivityに変更します

于 2012-11-09T01:50:51.283 に答える
0

アクティビティを名前でマニフェストに登録しまし android:name=".activity_arduino_blink_led"たが、コードにはアクティビティArduinoBlinkLEDActivityがあるので、次のように変更します

<activity android:name=".ArduinoBlinkLEDActivity"

それ以外の

<activity android:name=".activity_arduino_blink_led"
于 2012-11-09T01:11:00.283 に答える