Android 全局异常错误或崩溃捕捉

当出现崩溃，软件不会闪退，会出现弹出一个对话框，异常错误信息会自动保存在sd卡crash这个文件夹下。后续需要还可以发送到服务器的。看效果图。

1、实现效果图

2、全局异常捕捉类CrashHandler

package com.crashhandler.util;    import java.io.File;  import java.io.FileOutputStream;  import java.lang.Thread.UncaughtExceptionHandler;  import java.text.DateFormat;  import java.text.SimpleDateFormat;  import java.util.Date;    import com.crashhandler.activity.R;  import android.annotation.SuppressLint;  import android.app.AlertDialog;  import android.content.Context;  import android.content.DialogInterface;  import android.content.Intent;  import android.content.pm.PackageInfo;  import android.content.pm.PackageManager.NameNotFoundException;  import android.net.Uri;  import android.os.Environment;  import android.os.Looper;  import android.util.Log;  import android.view.WindowManager;    /**   * UncaughtException处理类,当程序发生Uncaught异常的时候,由该类来接管程序,并记录发送错误报告.   *    */  public class CrashHandler implements UncaughtExceptionHandler {   // 系统默认的UncaughtException处理类   private Thread.UncaughtExceptionHandler mDefaultHandler;   // CrashHandler实例   private static CrashHandler INSTANCE;   // 程序的Context对象   private Context mContext;     //保证只有一个CrashHandler实例    private CrashHandler() {     }     //获取CrashHandler实例 ,单例模式   public static CrashHandler getInstance() {    if (INSTANCE == null)     INSTANCE = new CrashHandler();    return INSTANCE;   }     /**    * 初始化    *     * @param context    */   public void init(Context context) {    mContext = context;    // 获取系统默认的UncaughtException处理器    mDefaultHandler = Thread.getDefaultUncaughtExceptionHandler();    // 设置该CrashHandler为程序的默认处理器    Thread.setDefaultUncaughtExceptionHandler(this);   }     /**    * 当UncaughtException发生时会转入该重写的方法来处理    */   public void uncaughtException(Thread thread, Throwable ex) {    if (!handleException(ex) && mDefaultHandler != null) {     // 如果自定义的没有处理则让系统默认的异常处理器来处理     mDefaultHandler.uncaughtException(thread, ex);    }   }     /**    * 自定义错误处理,收集错误信息 发送错误报告等操作均在此完成.    *     * @param ex    *            异常信息    * @return true 如果处理了该异常信息;否则返回false.    */   public boolean handleException(Throwable ex) {    if (ex == null || mContext == null)     return false;    final String crashReport = getCrashReport(mContext, ex);    new Thread() {     public void run() {      Looper.prepare();      File file = save2File(crashReport);      sendAppCrashReport(mContext, crashReport, file);      Looper.loop();     }      }.start();    return true;   }     @SuppressLint("SimpleDateFormat")   private File save2File(String crashReport) {    //用于格式化日期,作为日志文件名的一部分    DateFormat dateFormat = new SimpleDateFormat("yyyyMMddHHmmss");    String time = dateFormat.format(new Date());       String fileName = "crash-" + time + "-" + System.currentTimeMillis() + ".txt";    if (Environment.getExternalStorageState().equals(      Environment.MEDIA_MOUNTED)) {     try {      //存储路径，是sd卡的crash文件夹      File dir = new File(Environment.getExternalStorageDirectory()        .getAbsolutePath() + File.separator + "crash");      if (!dir.exists())       dir.mkdir();      File file = new File(dir, fileName);      FileOutputStream fos = new FileOutputStream(file);      fos.write(crashReport.toString().getBytes());      fos.close();      return file;     } catch (Exception e) {      //sd卡存储，记得加上权限，不然这里会抛出异常      Log.i("Show","save2File error:" + e.getMessage());     }    }    return null;   }     private void sendAppCrashReport(final Context context,     final String crashReport, final File file) {    AlertDialog.Builder builder = new AlertDialog.Builder(context)    .setIcon(android.R.drawable.ic_dialog_info)    .setTitle(R.string.app_error)    .setMessage(R.string.app_error_message)    .setPositiveButton(R.string.submit_report,      new DialogInterface.OnClickListener() {       public void onClick(DialogInterface dialog, int which) {        try {           //这以下的内容，只做参考，因为没有服务器         Intent intent = new Intent(Intent.ACTION_SEND);         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);         String[] tos = { "way.ping.li@gmail.com" };         intent.putExtra(Intent.EXTRA_EMAIL, tos);           intent.putExtra(Intent.EXTRA_SUBJECT,           "Android客户端 - 错误报告");         if (file != null) {          intent.putExtra(Intent.EXTRA_STREAM,            Uri.fromFile(file));          intent.putExtra(Intent.EXTRA_TEXT,            "请将此错误报告发送给我，以便我尽快修复此问题，谢谢合作！\n");         } else {          intent.putExtra(Intent.EXTRA_TEXT,            "请将此错误报告发送给我，以便我尽快修复此问题，谢谢合作！\n"              + crashReport);         }         intent.setType("text/plain");         intent.setType("message/rfc882");         Intent.createChooser(intent, "Choose Email Client");         context.startActivity(intent);                 } catch (Exception e) {         Log.i("Show","error:" + e.getMessage());        } finally {         dialog.dismiss();         // 退出         android.os.Process.killProcess(android.os.Process.myPid());         System.exit(1);        }       }      })    .setNegativeButton(android.R.string.cancel,      new DialogInterface.OnClickListener() {       public void onClick(DialogInterface dialog, int which) {        dialog.dismiss();        // 退出        android.os.Process.killProcess(android.os.Process.myPid());        System.exit(1);       }      });        AlertDialog dialog = builder.create();    //需要的窗口句柄方式，没有这句会报错的          dialog.getWindow().setType(WindowManager.LayoutParams.TYPE_SYSTEM_ALERT);    dialog.show();   }     /**    * 获取APP崩溃异常报告    *     * @param ex    * @return    */   private String getCrashReport(Context context, Throwable ex) {    PackageInfo pinfo = getPackageInfo(context);    StringBuffer exceptionStr = new StringBuffer();    exceptionStr.append("Version: " + pinfo.versionName + "("      + pinfo.versionCode + ")\n");    exceptionStr.append("Android: " + android.os.Build.VERSION.RELEASE      + "(" + android.os.Build.MODEL + ")\n");    exceptionStr.append("Exception: " + ex.getMessage() + "\n");    StackTraceElement[] elements = ex.getStackTrace();    for (int i = 0; i < elements.length; i++) {     exceptionStr.append(elements[i].toString() + "\n");    }    return exceptionStr.toString();   }     /**    * 获取App安装包信息    *     * @return    */   private PackageInfo getPackageInfo(Context context) {    PackageInfo info = null;    try {     info = context.getPackageManager().getPackageInfo(       context.getPackageName(), 0);    } catch (NameNotFoundException e) {      e.printStackTrace(System.err);    }    if (info == null)     info = new PackageInfo();    return info;   }    }

3、系统级MyApplication继承Application。因为需要整个软件的全局，所以需要在这里初始化CrashHandler

package com.crashhandler.util;  import android.app.Application;  public class MyApplication extends Application{   private static MyApplication mApplication;      public synchronized static MyApplication getInstance() {    return mApplication;   }      @Override   public void onCreate() {    super.onCreate();    initData();   }     private void initData() {    //当程序发生Uncaught异常的时候,由该类来接管程序,一定要在这里初始化    CrashHandler.getInstance().init(this);   }    }

4、看怎么使用MainActivity

package com.crashhandler.activity;    import android.os.Bundle;  import android.app.Activity;  import android.view.View;  import android.view.View.OnClickListener;  import android.widget.Button;    public class MainActivity extends Activity implements OnClickListener{     @Override   protected void onCreate(Bundle savedInstanceState) {    super.onCreate(savedInstanceState);    setContentView(R.layout.activity_main);        Button button = (Button)findViewById(R.id.button1);    button.setOnClickListener(this);   }     @Override   public void onClick(View v) {    switch (v.getId()) {    case R.id.button1:     //自已写了一个异常信息，进行测试     Button button = (Button)findViewById(R.id.textView1);     break;      default:     break;    }       }  }

5、记得加入一些权限

    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />      <uses-permission android:name="android.permission.ACCESS_DOWNLOAD_MANAGER" />      <uses-permission android:name="android.permission.DOWNLOAD_WITHOUT_NOTIFICATION" />      <uses-permission android:name="android.permission.SYSTEM_ALERT_WINDOW" />      <uses-permission android:name="android.permission.DISABLE_KEYGUARD" />      <uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />      <uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />      <uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />

    <application          android:name="com.crashhandler.util.MyApplication"    。。。。      </application>