应用崩溃的反馈


google目前也有个项目在处理这个问题http://code.google.com/p/acra/,不过那个包有点大,好几十k呢,如果我们想自我定制下,最重要的知识点就是

1.拦截UncaughtException
Application.onCreate()是整个Android应用的入口方法。在该方法中执行如下代码即可拦截UncaughtException:

		ueHandler = new UEHandler(this);
		// 设置异常处理实例
		Thread.setDefaultUncaughtExceptionHandler(ueHandler);
2.抓取导致程序崩溃的异常信息

UEHandler是Thread.UncaughtExceptionHandler的实现类,在其public void uncaughtException(Thread thread, Throwable ex)的实现中可以获取崩溃信息,代码如下:

 
 
package lab.sodino.uncaughtexception;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import android.content.Intent;
import android.util.Log;

/**
 * @author Sodino E-mail:[email protected]
 * @version Time:2011-6-9 下午11:50:43
 */
public class UEHandler implements Thread.UncaughtExceptionHandler {
	private SoftApplication softApp;
	private File fileErrorLog;

	public UEHandler(SoftApplication app) {
		softApp = app;
		fileErrorLog = new File(SoftApplication.PATH_ERROR_LOG);
	}

	@Override
	public void uncaughtException(Thread thread, Throwable ex) {
		// fetch Excpetion Info
		String info = null;
		ByteArrayOutputStream baos = null;
		PrintStream printStream = null;
		try {
			baos = new ByteArrayOutputStream();
			printStream = new PrintStream(baos);
			ex.printStackTrace(printStream);
			byte[] data = baos.toByteArray();
			info = new String(data);
			data = null;
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (printStream != null) {
					printStream.close();
				}
				if (baos != null) {
					baos.close();
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		// print
		long threadId = thread.getId();
		Log.d("ANDROID_LAB", "Thread.getName()=" + thread.getName() + " id=" + threadId + " state=" + thread.getState());
		Log.d("ANDROID_LAB", "Error[" + info + "]");
		if (threadId != 1) {
			// 此处示例跳转到汇报异常界面。
			Intent intent = new Intent(softApp, ActErrorReport.class);
			intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			intent.putExtra("error", info);
			intent.putExtra("by", "uehandler");
			softApp.startActivity(intent);
		} else {
			// 此处示例发生异常后,重新启动应用
			Intent intent = new Intent(softApp, ActOccurError.class);
			// 如果<span style="background-color: rgb(255, 255, 255); ">没有NEW_TASK标识且</span>是UI线程抛的异常则界面卡死直到ANR
			intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
			softApp.startActivity(intent);
			// write 2 /data/data/<app_package>/files/error.log
			write2ErrorLog(fileErrorLog, info);
			// kill App Progress
			android.os.Process.killProcess(android.os.Process.myPid());
		}
	}

	private void write2ErrorLog(File file, String content) {
		FileOutputStream fos = null;
		try {
			if (file.exists()) {
				// 清空之前的记录
				file.delete();
			} else {
				file.getParentFile().mkdirs();
			}
			file.createNewFile();
			fos = new FileOutputStream(file);
			fos.write(content.getBytes());
		} catch (Exception e) {
			e.printStackTrace();
		} finally {
			try {
				if (fos != null) {
					fos.close();
				}
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}
}



另外UI主线程的thread id固定为1,莫非是每次因为他先启动的?
this.getBaseContext().getMainLooper().getThread().getId()
上面取到的值确实是个1,即使在application的oncreate中先启动个thread,这个再研究下ActivityThread了

其他的内容参见http://blog.csdn.net/sodino/archive/2011/06/13/6540329.aspx 


本文内容归CSDN博客博主Sodino 所有

转载请注明出处: http://blog.csdn.net/sodino/archive/2011/06/13/6540329.aspx 

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