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Android处理未捕获的异常（应用全局异常）

2024-08-07 04:44:55   221人阅读

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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Android处理未捕获的异常（应用全局异常）


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