Android处理未捕获的异常（应用全局异常）

public class CrashHandler implements UncaughtExceptionHandler

{

private static CrashHandler instance;

 

public static final String TAG = "CrashHandler";

 

private static final String VERSION_NAME = "versionName";

 

private static final String VERSION_CODE = "versionCode";

 

private static final String STACK_TRACE = "STACK_TRACE";

 

private Thread.UncaughtExceptionHandler mDefaultHandler;

 

private Context mContext;

 

private static final String CRASH_REPORTER_EXTENSION = ".cr";

private Properties deviceCrashInfo = new Properties();

 

private CrashHandler()

{

}

 

public static synchronized CrashHandler getInstance()

{

if (instance == null)

{

instance = new CrashHandler();

}

return instance;

}

 

public void init(Context ctx)

{

this.mContext = ctx;

mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();

Thread.setDefaultUncaughtExceptionHandler(this);

}

 

@Override

public void uncaughtException(Thread thread, Throwable ex)

{

if (mDefaultHandler != null && !handlerException(ex))

{

// 如果用户没有进行异常处理就让系统默认的处理器来处理

mDefaultHandler.uncaughtException(thread, ex);

} else

{

exitApp();

}

}

 

private boolean handlerException(Throwable ex)

{

if (ex == null)

{

return true;

}

final String msg = ex.getLocalizedMessage();

new Thread() {

@Override

public void run()

{

Looper.prepare();

Toast toast = Toast.makeText(mContext, "程序出错啦！" + msg, Toast.LENGTH_SHORT);

toast.setGravity(Gravity.CENTER, 0, 0);

toast.show();

Looper.loop();

}

}.start();

// 收集设备信息

collectDeviceInfo(mContext);

// 保存错误

saveCrashInfoToFiles(ex);

// 发送错误报告到服务器

sendCrashReportsToServer(mContext);

return true;

}

 

private void collectDeviceInfo(Context ctx)

{

try

{

PackageManager pm = ctx.getPackageManager();

PackageInfo pi = pm.getPackageArchiveInfo(ctx.getPackageName(),

PackageManager.GET_ACTIVITIES);

if (pi != null)

{

deviceCrashInfo.put(VERSION_NAME, pi.versionName == null ? "not set"

: pi.versionName);

deviceCrashInfo.put(VERSION_CODE, pi.versionCode);

}

} catch (Exception e)

{

Log.e(TAG, "error occured when collecting crash info" + e);

}

 

// 使用反射来收集设备信息.在Build类中包含各种设备信息,

// 例如: 系统版本号,设备生产商 等帮助调试程序的有用信息

// 具体信息请参考后面的截图

Field[] fields = Builder.class.getDeclaredFields();

for (Field field : fields)

{

try

{

field.setAccessible(true);

deviceCrashInfo.put(field.getName(), null);

} catch (Exception e)

{

Log.e(TAG, "error occured when collecting device info" + e);

}

}

}

 

private String saveCrashInfoToFiles(Throwable ex)

{

Writer info = new StringWriter();

PrintWriter printWriter = new PrintWriter(info);

ex.printStackTrace(printWriter);

 

Throwable cause = ex.getCause();

while (cause != null)

{

ex.printStackTrace(printWriter);

cause = cause.getCause();

}

 

String result = info.toString();

printWriter.close();

deviceCrashInfo.put("EXCEPTION", ex.getLocalizedMessage());

deviceCrashInfo.put(STACK_TRACE, result);

 

try

{

long time = System.currentTimeMillis();

String filename = "crash-" + time + CRASH_REPORTER_EXTENSION;

FileOutputStream trace = mContext.openFileOutput(filename, Context.MODE_PRIVATE);

 

deviceCrashInfo.store(trace, "");

trace.flush();

trace.close();

} catch (Exception e)

{

Log.e(TAG, "error occured when save crashinfo to files" + e);

}

return null;

}

 

private void sendCrashReportsToServer(Context ctx)

{

String[] crFiles = getCrashReportFiles(ctx);

if (crFiles != null && crFiles.length > 0)

{

TreeSet<String> sortedFiles = new TreeSet<String>();

sortedFiles.addAll(Arrays.asList(crFiles));

for (String fileName : sortedFiles)

{

File cr = new File(ctx.getFilesDir(), fileName);

postReport(cr);

cr.delete();// 删除已发送的报告

}

}

}

 

private void postReport(File file)

{

// TODO 发送错误报告到服务器

}

 

private String[] getCrashReportFiles(Context ctx)

{

File filesDir = ctx.getFilesDir();

FilenameFilter filter = new FilenameFilter() {

public boolean accept(File dir, String name)

{

return name.endsWith(CRASH_REPORTER_EXTENSION);

}

};

return filesDir.list(filter);

}

 

private void exitApp()

{

android.os.Process.killProcess(android.os.Process.myPid());

System.exit(0);

}

}

 

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