Android使用UncaughtExceptionHandler捕獲全局異常

Android系統的“程序異常退出”，給應用的用戶體驗造成不良影響。爲了捕獲應用運行時異常並給出友好提示，便可繼承UncaughtExceptionHandler類來處理。通過Thread.setDefaultUncaughtExceptionHandler()方法將異常處理類設置到線程上即可。

    1、異常處理類，代碼如下：

[java] view plaincopyprint?

public class CrashHandler implements UncaughtExceptionHandler {
    public static final String TAG = "CrashHandler";
    private static CrashHandler INSTANCE = new CrashHandler();
    private Context mContext;
    private Thread.UncaughtExceptionHandler mDefaultHandler;

    private CrashHandler() {
    }

    public static CrashHandler getInstance() {
        return INSTANCE;
    }

    public void init(Context ctx) {
        mContext = ctx;
        mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();
        Thread.setDefaultUncaughtExceptionHandler(this);
    }

    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        // if (!handleException(ex) && mDefaultHandler != null) {
        // mDefaultHandler.uncaughtException(thread, ex);
        // } else {
        // android.os.Process.killProcess(android.os.Process.myPid());
        // System.exit(10);
        // }
        System.out.println("uncaughtException");

        new Thread() {
            @Override
            public void run() {
                Looper.prepare();
                new AlertDialog.Builder(mContext).setTitle("提示").setCancelable(false)
                        .setMessage("程序崩潰了...").setNeutralButton("我知道了", new OnClickListener() {
                            @Override
                            public void onClick(DialogInterface dialog, int which) {
                                System.exit(0);
                            }
                        })
                        .create().show();
                Looper.loop();
            }
        }.start();
    }

    /**
     * 自定義錯誤處理,收集錯誤信息 發送錯誤報告等操作均在此完成. 開發者可以根據自己的情況來自定義異常處理邏輯
     *
     * @param ex
     * @return true:如果處理了該異常信息;否則返回false
     */
    private boolean handleException(Throwable ex) {
        if (ex == null) {
            return true;
        }
        // new Handler(Looper.getMainLooper()).post(new Runnable() {
        // @Override
        // public void run() {
        // new AlertDialog.Builder(mContext).setTitle("提示")
        // .setMessage("程序崩潰了...").setNeutralButton("我知道了", null)
        // .create().show();
        // }
        // });

        return true;
    }
}

2、線程綁定異常處理類

public class CrashHandlerActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        CrashHandler crashHandler = CrashHandler.getInstance();
        crashHandler.init(this);  //傳入參數必須爲Activity，否則AlertDialog將不顯示。
        // 創建錯誤
        throw new NullPointerException();
    }
}

public class CrashHandlerActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        CrashHandler crashHandler = CrashHandler.getInstance();  
        crashHandler.init(this);  //傳入參數必須爲Activity，否則AlertDialog將不顯示。
        // 創建錯誤
        throw new NullPointerException();
    }
}

Demo下載地址：http://code.google.com/p/android-custom-view/downloads/list

轉載地址: http://orgcent.com/android-uncaughtexceptionhandler-exception/ | 蘿蔔白菜的博客