在開發(fā)過程中或者在程序正式上線以后，總是或多或少的出現(xiàn)程序崩潰的情況，大多是程序在測試的時候，沒有完整測試。此時，自定義全局未處理異常捕捉器就顯得非常有用了

實現(xiàn)步驟：

1. 自定義全局未處理異常捕捉器，需要實現(xiàn)UncaughtExceptionHandler接口，并重寫uncaughtException(Thread thread, Throwable ex)方法
2. 在Application或者主頁面Activity或者某個Activity中，調(diào)用方法Thread.setDefaultUncaughtExceptionHandler，設(shè)置自定義的異常捕捉器為默認(rèn)的全局異常捕捉器

實現(xiàn)栗子

在主頁面中設(shè)置異常捕捉器，在第二個界面中發(fā)生異常，提示用戶程序崩潰，將異常原因以文本形式保存到本地，重新啟動程序進(jìn)入主頁面

自定義異常捕捉器：

public class MyExceptionHanlder implements UncaughtExceptionHandler {

    private Context mContext = null;
    private String className = "";

    public MyExceptionHanlder(Context context) {
        this.mContext = context;
    }

    public MyExceptionHanlder(Context context, String className) {
        this.mContext = context;
        this.className = className;
    }

    /**
     * 當(dāng)自定義的異常捕獲異常處理器被設(shè)置為此APP默認(rèn)的異常處理器，
     * 發(fā)生未處理異常時，此方法會被自動調(diào)用
     * @param thread 所發(fā)生異常所在的線程
     * @param ex 拋出的未處理異常Throwable對象
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (ex != null) {
            Log.i("UncaughtException", ex.getMessage());
            StringBuilder sb = new StringBuilder();
            String temp = ex.getMessage();
            if (temp != null) {
                sb.append("ex.getMessage()：");
                sb.append(System.getProperty("line.separator"));
                sb.append(temp);
            }
            sb.append(System.getProperty("line.separator"));
            sb.append("thread.getName()：" + thread.getName());
            sb.append(System.getProperty("line.separator"));
            sb.append(" Trace: " + System.getProperty("line.separator"));
            StackTraceElement[] elements = ex.getStackTrace();
            if (elements != null) {
                for (StackTraceElement element : elements) {
                    temp = element.toString();
                    if (temp != null) {
                        sb.append(temp);
                    }
                    sb.append(System.getProperty("line.separator"));
                }
            }

            sb.append("Cause: ");
            sb.append(System.getProperty("line.separator"));
            Throwable theCause = ex.getCause();
            if (theCause != null) {
                temp = theCause.toString();
                if (temp != null) {
                    sb.append(temp);
                }
            }
            sb.append(System.getProperty("line.separator") + " Cause Stack: " +
                    System.getProperty("line.separator"));
            theCause = ex.getCause();
            if (theCause != null) {
                elements = theCause.getStackTrace();
                if (elements != null) {
                    for (StackTraceElement element : elements) {
                        temp = element.toString();
                        if (temp != null) {
                            sb.append(temp);
                        }
                        sb.append(System.getProperty("line.separator"));
                    }
                }
            }

            try {
                //將異常信息存入本地文件
                this.writeCrashLog(sb);
            } catch (Exception e) {
                e.printStackTrace();
            }
            //彈出自定義處理異常界面
            Intent intent = new Intent(mContext, ExceptionDialog.class);
            intent.putExtra("className", className);
            mContext.startActivity(intent);
            //銷毀頁面，殺死APP進(jìn)程
            crash(mContext);

        }
    }

    /**
     * 將異常信息存入本地信息
     * @param sb StringBuilder對象
     * @throws Exception 拋出異常對象
     */
    private void writeCrashLog(StringBuilder sb) throws Exception {
        //存儲路徑
        String path = Environment.getExternalStorageDirectory() + "/crashLog.txt";
        Log.d("Main", path);
        File logFile = new File(path);
        if (!logFile.exists()){
            logFile.createNewFile();
        }else{
            logFile.delete();
            logFile.createNewFile();
        }
        BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(logFile));
        bufferedWriter.write(sb.toString());
        bufferedWriter.close();
        Toast.makeText(mContext, "寫入成功", Toast.LENGTH_LONG).show();
    }

    /**
     * 銷毀頁面以及關(guān)閉APP進(jìn)程
     * @param context 上下文對象
     * @return 是否銷毀頁面以及當(dāng)前進(jìn)程
     */
    public static boolean crash(Context context) {
        if (context == null) {
            return false;
        }
        //銷毀頁面
        if (context instanceof Activity) {
            ((Activity) context).finish();
        }
        //殺死APP進(jìn)程
        Process.killProcess(Process.myPid());
        return true;
    }

**源文件下載地址：http://download.csdn.net/detail/xiaoshengfdyh/9704576**