1 Thread.currentThread().setUncaughtExceptionHandler(MyCrashHandler.getInstance(getApplicationContext()));

 1 package cn.itcast.crash;
 2 
 3 import java.lang.Thread.UncaughtExceptionHandler;
 4 
 5 import android.app.Application;
 6 
 7 public class MyApp extends Application {
 8     
 9 
10     /**
11      * 應用程序 的進程在第一次被創建的時候 執行的方法
12      */
13     @Override
14     public void onCreate() {
15         
16         Thread.currentThread().setUncaughtExceptionHandler(MyCrashHandler.getInstance(getApplicationContext()));
17         
18         
19         
20         super.onCreate();
21     }
22 
23     
24     
25 }

 1 package cn.itcast.crash;
 2 
 3 import java.io.File;
 4 import java.io.FileOutputStream;
 5 import java.io.PrintWriter;
 6 import java.io.StringWriter;
 7 import java.lang.Thread.UncaughtExceptionHandler;
 8 import java.lang.reflect.Field;
 9 
10 import android.content.Context;
11 import android.content.pm.PackageInfo;
12 import android.os.Build;
13 import android.os.Environment;
14 
15 public class MyCrashHandler implements UncaughtExceptionHandler {
16     private MyCrashHandler() {
17     };
18     private static UncaughtExceptionHandler defaultHandler;
19     //定義一個系統的默認的異常處理的handler
20     private static MyCrashHandler myCrashHandler;
21     private static Context mContext;
22 
23     public synchronized static MyCrashHandler getInstance(Context context) {
24         if (myCrashHandler == null) {
25             myCrashHandler = new MyCrashHandler();
26             mContext = context;
27             defaultHandler = Thread.currentThread().getDefaultUncaughtExceptionHandler();
28         }
29         return myCrashHandler;
30     }
31 
32     /**
33      * 當某一個異常 沒有代碼顯示的捕獲的時候, 系統會調用 默認的異常處理的代碼 處理這個異常
34      */
35     @Override
36     public void uncaughtException(Thread thread, Throwable ex) {
37         System.out.println("出現了異常,但是被哥捕獲了");
38         StringWriter wr = new StringWriter();
39         PrintWriter pw = new PrintWriter(wr);
40         ex.printStackTrace(pw);
41         StringBuilder sb = new StringBuilder();
42 
43         try {
44             PackageInfo packinfo = mContext.getPackageManager().getPackageInfo(
45                     mContext.getPackageName(), 0);
46             String version = packinfo.versionName;
47             sb.append("錯誤信息:\n");
48             sb.append("版本號:" + version + "\n");
49 
50             String errorlog = wr.toString();
51             sb.append(errorlog);
52             sb.append("\n");
53 
54             // 獲取當前手機操作系統的信息.
55             Field[] fields = Build.class.getDeclaredFields();
56             for (Field field : fields) {
57                 field.setAccessible(true);// 暴力反射,可以獲取私有成員變量的信息
58                 String name = field.getName();
59                 String value = field.get(null).toString();
60                 sb.append(name+"="+value+"\n");
61             }
62             String time ="time:"+ System.currentTimeMillis();
63             sb.append(time);
64             String log = sb.toString();
65             File file = new File(Environment.getExternalStorageDirectory(),"error.log");
66             FileOutputStream fos = new FileOutputStream(file);
67             fos.write(log.getBytes());
68             fos.flush();
69             fos.close();
70             
71             android.os.Process.killProcess(android.os.Process.myPid());
72             //調用系統的默認的異常處理方法 處理這個異常
73             defaultHandler.uncaughtException(thread, ex);
74             
75         } catch (Exception e) {
76             e.printStackTrace();
77         }
78 
79     }
80 
81 }