全域性異常捕獲

廢話不多說，直接上程式碼

package com.util;

import java.io.PrintWriter;
import java.io.StringWriter;
import java.io.Writer;
import java.lang.Thread.UncaughtExceptionHandler;

import android.content.Context;

/**
 *  全域性異常捕獲控制代碼類
 */
public class CrashHandler implements UncaughtExceptionHandler {

    public
 
 static final String TAG = "CrashHandler";
    public static final boolean DEBUG = false; // 是否開啟日誌輸出,在Debug狀態下開啟,
                                                // 在Release狀態下關閉以提高程式效能

    private static CrashHandler crashHandler;

    private Thread.UncaughtExceptionHandler exceptionHandler; // 系統預設的UncaughtExceptionHandler
 

    private Context context;

    /**
     * 私有建構函式
     */
    private CrashHandler() {
    }

    /**
     * @return 單例
     */
    public static CrashHandler getInstance() {
        if (crashHandler == null) {
            crashHandler = new CrashHandler();
        }
        return crashHandler;
    }

    /**
     * @param
 
 context
     *            上下文物件
     */
    public void init(Context context) {
        this.context = context;
        exceptionHandler = Thread.getDefaultUncaughtExceptionHandler(); // 獲取系統預設的UncaughtExceptionHandler
        Thread.setDefaultUncaughtExceptionHandler(this); // 設定本類物件crashHandler為程式的預設處理器
    }

    /**
     * 當異常發生時，捕獲異常
     * 
     * @param thread
     *            執行緒
     * @param ex
     *            異常
     */
    @Override
    public void uncaughtException(Thread thread, Throwable ex) {
        if (!handleException(thread, ex) && exceptionHandler != null) {
            exceptionHandler.uncaughtException(thread, ex); // 如果使用者沒有處理則讓系統預設的異常處理器來處理
        } else {
            try {
                Thread.sleep(3000);
            } catch (InterruptedException e) {
                SLog.Console("===============CrashHandler================");
                SLog.saveException(e);
                SLog.Console("==============CrashHandlerEnd==============");
            }
        }
    }

    /**
     * 自定義異常處理
     * 
     * @param ex
     *            異常
     * @return boolean 是否處理
     */
    private boolean handleException(Thread thread,  Throwable ex) {
        if (ex == null) {
            return true;
        }
         StringWriter sw = new StringWriter();  
            PrintWriter pw = new PrintWriter(sw, true);  
            ex.printStackTrace(pw);  
            pw.flush();  
            sw.flush();  
        this.saveInfo2File(ex); // 儲存錯誤報告檔案
        return true;
    }

    /**
     * 儲存異常資訊到檔案中
     * 
     * @param ex
     *            異常
     * @return String 異常資訊
     */
    public String saveInfo2File(final Throwable ex) {
//      if (MainApplication.getInstance().isTest) {
//          new Thread(){    
//              @Override    
//              public void run() {    
//                  Looper.prepare();    
//                  String errorMsg=MessageUtils.getExcptionToastMessage(ex);
//                  Toast.makeText(MainApplication.getInstance(), "很抱歉,程式出現"+errorMsg+",即將退出.",   
//                          Toast.LENGTH_LONG).show();    
//                  Looper.loop();    
//              }   
//          }.start();   
//      }
        Writer writer = new StringWriter();
        PrintWriter printWriter = new PrintWriter(writer);
        ex.printStackTrace(printWriter);

        Throwable cause = ex.getCause();
        while (cause != null) {
            cause.printStackTrace(printWriter);
            cause = cause.getCause();
        }

        String info = writer.toString();
        printWriter.close();
        FileUtil.saveLog("=================CrashInfo===============");
        FileUtil.saveLog(info);
        SLog.Console(info);
        FileUtil.saveLog("================CrashInfoEnd=============");
        return info;
    }

}

然後在MainApplication中新增對應的宣告即可

package com.example.zxingdemo;

import android.app.Application;

import com.util.CrashHandler;
import com.util.PathUtil;
import com.util.SLog;

public class MainApplication extends Application {

    private static MainApplication mApplication;

    @Override
    public void onCreate() {
        super.onCreate();
        mApplication = this;
        PathUtil.getInstance().init(mApplication);
        SLog.cleanOutOfDateLog();
        // 新增全域性異常捕獲
        CrashHandler crashHandler = CrashHandler.getInstance();
        crashHandler.init(getApplicationContext());
    }

    public static synchronized MainApplication getInstance() {
        return mApplication;
    }
}

最後一定要注意在Manifest裡邊指定Application

<application
        android:name="com.example.zxingdemo.MainApplication"
        android:allowBackup="true"
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name"
        android:theme="@style/AppTheme" >
        <activity
            android:name=".MainActivity"
            android:label="@string/app_name"
            android:screenOrientation="portrait" >
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />

                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity
            android:name="com.karics.library.zxing.android.CaptureActivity"
            android:theme="@android:style/Theme.NoTitleBar"
            android:screenOrientation="portrait" >
        </activity>
    </application>