我是Android调试新手。我阅读了有关和过滤功能的logCat和DDMS。
但是，我不明白如何使用logCat调试我的代码。我按错误将我的logcat分类。我从各种问题中得到了30个错误，从声音问题到电池问题再到主要问题......
04-20 06:31:09.982: ERROR/Zygote(33): setreuid() failed. errno: 2
04-20 06:31:16.872: ERROR/Zygote(33): setreuid() failed. errno: 17
04-20 06:31:18.064: ERROR/BatteryService(60): usbOnlinePath not found
04-20 06:31:18.064: ERROR/BatteryService(60): batteryVoltagePath not found
04-20 06:31:18.064: ERROR/BatteryService(60): batteryTemperaturePath not found
04-20 06:31:18.082: ERROR/SurfaceFlinger(60): Couldn't open /sys/power/wait_for_fb_sleep or /sys/power/wait_for_fb_wake
04-20 06:31:23.482: ERROR/EventHub(60): could not get driver version for /dev/input/mouse0, Not a typewriter
04-20 06:31:23.482: ERROR/EventHub(60): could not get driver version for /dev/input/mice, Not a typewriter
04-20 06:31:23.692: ERROR/System(60): Failure starting core service
04-20 06:31:23.692: ERROR/System(60): java.lang.SecurityException
04-20 06:31:23.692: ERROR/System(60): at android.os.BinderProxy.transact(Native Method)
04-20 06:31:23.692: ERROR/System(60): at android.os.ServiceManagerProxy.addService(ServiceManagerNative.java:146)
04-20 06:31:23.692: ERROR/System(60): at android.os.ServiceManager.addService(ServiceManager.java:72)
04-20 06:31:23.692: ERROR/System(60): at com.android.server.ServerThread.run(SystemServer.java:184)
04-20 06:31:24.602: ERROR/SoundPool(60): error loading /system/media/audio/ui/Effect_Tick.ogg
04-20 06:31:24.602: ERROR/SoundPool(60): error loading /system/media/audio/ui/KeypressStandard.ogg
04-20 06:31:24.602: ERROR/SoundPool(60): error loading /system/media/audio/ui/KeypressSpacebar.ogg
04-20 06:31:24.612: ERROR/SoundPool(60): error loading /system/media/audio/ui/KeypressDelete.ogg
04-20 06:31:24.622: ERROR/SoundPool(60): error loading /system/media/audio/ui/KeypressReturn.ogg
04-20 06:31:26.411: ERROR/ThrottleService(60): Could not open GPS configuration file /etc/gps.conf
04-20 06:31:27.751: ERROR/logwrapper(149): executing /system/bin/tc failed: No such file or directory
04-20 06:31:27.792: ERROR/logwrapper(150): executing /system/bin/tc failed: No such file or directory
04-20 06:31:27.823: ERROR/logwrapper(151): executing /system/bin/tc failed: No such file or directory
04-20 06:31:37.841: ERROR/HierarchicalStateMachine(60): TetherMaster - unhandledMessage: msg.what=3
04-20 06:31:58.767: ERROR/AndroidRuntime(277): FATAL EXCEPTION: main
04-20 06:31:58.767: ERROR/AndroidRuntime(277): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.markana.yamba/com.markana.yamba.StatusActivity1}: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-2.apk]
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.os.Handler.dispatchMessage(Handler.java:99)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.os.Looper.loop(Looper.java:123)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at java.lang.reflect.Method.invoke(Method.java:521)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at dalvik.system.NativeStart.main(Native Method)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): Caused by: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-2.apk]
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
04-20 06:31:58.767: ERROR/AndroidRuntime(277): ... 11 more
04-20 07:30:54.993: ERROR/Zygote(33): setreuid() failed. errno: 2
04-20 07:31:02.125: ERROR/Zygote(33): setreuid() failed. errno: 17
04-20 07:31:03.243: ERROR/BatteryService(59): usbOnlinePath not found
04-20 07:31:03.243: ERROR/BatteryService(59): batteryVoltagePath not found
04-20 07:31:03.243: ERROR/BatteryService(59): batteryTemperaturePath not found
04-20 07:31:03.273: ERROR/SurfaceFlinger(59): Couldn't open /sys/power/wait_for_fb_sleep or /sys/power/wait_for_fb_wake
04-20 07:31:09.004: ERROR/EventHub(59): could not get driver version for /dev/input/mouse0, Not a typewriter
04-20 07:31:09.004: ERROR/EventHub(59): could not get driver version for /dev/input/mice, Not a typewriter
04-20 07:31:09.265: ERROR/System(59): Failure starting core service
04-20 07:31:09.265: ERROR/System(59): java.lang.SecurityException
04-20 07:31:09.265: ERROR/System(59): at android.os.BinderProxy.transact(Native Method)
04-20 07:31:09.265: ERROR/System(59): at android.os.ServiceManagerProxy.addService(ServiceManagerNative.java:146)
04-20 07:31:09.265: ERROR/System(59): at android.os.ServiceManager.addService(ServiceManager.java:72)
04-20 07:31:09.265: ERROR/System(59): at com.android.server.ServerThread.run(SystemServer.java:184)
04-20 07:31:10.843: ERROR/SoundPool(59): error loading /system/media/audio/ui/Effect_Tick.ogg
04-20 07:31:10.865: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressStandard.ogg
04-20 07:31:10.865: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressSpacebar.ogg
04-20 07:31:10.873: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressDelete.ogg
04-20 07:31:10.884: ERROR/SoundPool(59): error loading /system/media/audio/ui/KeypressReturn.ogg
04-20 07:31:12.824: ERROR/ThrottleService(59): Could not open GPS configuration file /etc/gps.conf
04-20 07:31:14.294: ERROR/logwrapper(149): executing /system/bin/tc failed: No such file or directory
04-20 07:31:14.364: ERROR/logwrapper(150): executing /system/bin/tc failed: No such file or directory
04-20 07:31:14.403: ERROR/logwrapper(152): executing /system/bin/tc failed: No such file or directory
04-20 07:31:26.859: ERROR/HierarchicalStateMachine(59): TetherMaster - unhandledMessage: msg.what=3
04-20 07:31:49.188: ERROR/AndroidRuntime(298): FATAL EXCEPTION: main
04-20 07:31:49.188: ERROR/AndroidRuntime(298): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.markana.yamba/com.markana.yamba.StatusActivity1}: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-1.apk]
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.os.Handler.dispatchMessage(Handler.java:99)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.os.Looper.loop(Looper.java:123)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at java.lang.reflect.Method.invoke(Method.java:521)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at dalvik.system.NativeStart.main(Native Method)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): Caused by: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-1.apk]
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
04-20 07:31:49.188: ERROR/AndroidRuntime(298): ... 11 more
04-20 07:33:45.057: ERROR/AndroidRuntime(369): FATAL EXCEPTION: main
04-20 07:33:45.057: ERROR/AndroidRuntime(369): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.markana.yamba/com.markana.yamba.StatusActivity1}: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-1.apk]
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.os.Handler.dispatchMessage(Handler.java:99)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.os.Looper.loop(Looper.java:123)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at java.lang.reflect.Method.invoke(Method.java:521)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at dalvik.system.NativeStart.main(Native Method)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): Caused by: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-1.apk]
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
04-20 07:33:45.057: ERROR/AndroidRuntime(369): ... 11 more
04-20 07:33:58.677: ERROR/AndroidRuntime(412): FATAL EXCEPTION: main
04-20 07:33:58.677: ERROR/AndroidRuntime(412): java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.markana.yamba/com.markana.yamba.StatusActivity1}: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-2.apk]
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2585)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2679)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.app.ActivityThread.access$2300(ActivityThread.java:125)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2033)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.os.Handler.dispatchMessage(Handler.java:99)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.os.Looper.loop(Looper.java:123)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.app.ActivityThread.main(ActivityThread.java:4627)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at java.lang.reflect.Method.invokeNative(Native Method)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at java.lang.reflect.Method.invoke(Method.java:521)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at dalvik.system.NativeStart.main(Native Method)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): Caused by: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1 in loader dalvik.system.PathClassLoader[/data/app/com.markana.yamba-2.apk]
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at dalvik.system.PathClassLoader.findClass(PathClassLoader.java:243)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at java.lang.ClassLoader.loadClass(ClassLoader.java:573)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at java.lang.ClassLoader.loadClass(ClassLoader.java:532)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.app.Instrumentation.newActivity(Instrumentation.java:1021)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2577)
04-20 07:33:58.677: ERROR/AndroidRuntime(412): ... 11 more
我在课堂上的代码非常简单，我做了Android Orielly书中的例子：
package com.markana.yamba;
import winterwell.jtwitter.Twitter;
import winterwell.jtwitter.TwitterException;
import android.app.Activity;
import android.graphics.Color;
import android.os.AsyncTask;
import android.os.Bundle;
import android.text.Editable;
import android.text.TextWatcher;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;
public class StatusActivity2 extends Activity implements OnClickListener{
private static final String TAG= "StatusActivity";
EditText editText;
Button updateButton;
TextView textCount;
Twitter twitter;
/** Called when the activity is first created. */
@SuppressWarnings("deprecation")
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.status);
//Finds views
editText =(EditText) findViewById(R.id.editText);
updateButton=(Button) findViewById(R.id.buttonUpdate);
updateButton.setOnClickListener(this);
textCount= (TextView) findViewById(R.id.editText);
textCount.setText(Integer.toString(40));
textCount.setTextColor(Color.GREEN);
// editText.addTextChangedListener(this);
twitter=new Twitter("student","password");
twitter.setAPIRootUrl(("http://yamba.marakana.com/api"));
//added by me
AsyncTask<String, ?, ?> asyn=new PostToTwitter();
asyn.execute("deliver this to twitter");
}
class PostToTwitter extends AsyncTask<String,Integer, String>
{
@Override
protected String doInBackground(String... statuses) {
try{
Twitter.Status status=twitter.updateStatus(statuses[0]);
return status.text;
}
catch(TwitterException e)
{
Log.e(TAG,e.toString());
e.printStackTrace();
return "Failed to post";
}
}
protected void onProgressUpdate(Integer...values)
{
super.onProgressUpdate(values);
}
protected void onPostExecute(String result)
{
Toast.makeText(StatusActivity2.this,result,Toast.LENGTH_LONG).show();
}
}
public void onClick(View arg0) {
// TODO Auto-generated method stub
String status=editText.getText().toString();
new PostToTwitter().execute(status);
Log.d(TAG, "onClick");
}
}
我没有红色错误标记，也没有在这里，也没有在main.xml，string.xml文件
我如何追踪我的错误？
答案 0 :(得分：2)
您只需阅读输出即可找到
Caused by: java.lang.ClassNotFoundException: com.markana.yamba.StatusActivity1
这意味着您已部署到设备的.apk中缺少此类。
请注意，您的活动名为StatusActivity2 - 如果清单仍为StatusActivity1，请仔细检查清单。