Android 全局异常捕获

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全局异常捕获

废话不多说，直接上代码

package com.util;import java.io.PrintWriter;import java.io.StringWriter;import java.io.Writer;import java.lang.Thread.UncaughtExceptionHandler;import android.content.Context;/** *  全局异常捕获句柄类 */public class CrashHandler implements UncaughtExceptionHandler {    public static final String TAG = "CrashHandler";    public static final boolean DEBUG = false; // 是否开启日志输出,在Debug状态下开启,                                                // 在Release状态下关闭以提高程序性能    private static CrashHandler crashHandler;    private Thread.UncaughtExceptionHandler exceptionHandler; // 系统默认的UncaughtExceptionHandler    private Context context;    /**     * 私有构造函数     */    private CrashHandler() {    }    /**     * @return 单例     */    public static CrashHandler getInstance() {        if (crashHandler == null) {            crashHandler = new CrashHandler();        }        return crashHandler;    }    /**     * @param context     *            上下文对象     */    public void init(Context context) {        this.context = context;        exceptionHandler = Thread.getDefaultUncaughtExceptionHandler(); // 获取系统默认的UncaughtExceptionHandler        Thread.setDefaultUncaughtExceptionHandler(this); // 设置本类对象crashHandler为程序的默认处理器    }    /**     * 当异常发生时，捕获异常     *      * @param thread     *            线程     * @param ex     *            异常     */    @Override    public void uncaughtException(Thread thread, Throwable ex) {        if (!handleException(thread, ex) && exceptionHandler != null) {            exceptionHandler.uncaughtException(thread, ex); // 如果用户没有处理则让系统默认的异常处理器来处理        } else {            try {                Thread.sleep(3000);            } catch (InterruptedException e) {                SLog.Console("===============CrashHandler================");                SLog.saveException(e);                SLog.Console("==============CrashHandlerEnd==============");            }        }    }    /**     * 自定义异常处理     *      * @param ex     *            异常     * @return boolean 是否处理     */    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); // 保存错误报告文件        return true;    }    /**     * 保存异常信息到文件中     *      * @param ex     *            异常     * @return String 异常信息     */    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,程序出现"+errorMsg+",即将退出.",   //                          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;    }}

然后在MainApplication中添加对应的声明即可

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();        // 添加全局异常捕获        CrashHandler crashHandler = CrashHandler.getInstance();        crashHandler.init(getApplicationContext());    }    public static synchronized MainApplication getInstance() {        return mApplication;    }}

最后一定要注意在Manifest里边指定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>

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