ueHandler = new UEHandler(this);
// 设置异常处理实例
Thread.setDefaultUncaughtExceptionHandler(ueHandler);

// fetch Excpetion Info
String info = null;
ByteArrayOutputStream baos = null;
PrintStream printStream = null;
try {
  baos = new ByteArrayOutputStream();
  printStream = new PrintStream(baos);
  ex.printStackTrace(printStream);
  byte[] data = baos.toByteArray();
  info = new String(data);
  data = null;
} catch (Exception e) {
  e.printStackTrace();
} finally {
  try {
    if (printStream != null) {
      printStream.close();
    }
    if (baos != null) {
      baos.close();
    }
  } catch (Exception e) {
    e.printStackTrace();
  }
}

package lab.sodino.errorreport;
import java.io.File;
import android.app.Application;
/**
 * @author Sodino E-mail:sodinoopen@hotmail.com
 * @version Time：2011-6-9 下午11:49:56
 */
public class SoftApplication extends Application {
  /** "/data/data/<app_package>/files/error.log" */
  public static final String PATH_ERROR_LOG = File.separator + "data" + File.separator + "data"
      + File.separator + "lab.sodino.errorreport" + File.separator + "files" + File.separator
      + "error.log";
  /** 标识是否需要退出。为true时表示当前的Activity要执行finish()。 */
  private boolean need2Exit;
  /** 异常处理类。 */
  private UEHandler ueHandler;
  public void onCreate() {
    need2Exit = false;
    ueHandler = new UEHandler(this);
    // 设置异常处理实例
    Thread.setDefaultUncaughtExceptionHandler(ueHandler);
  }
  public void setNeed2Exit(boolean bool) {
    need2Exit = bool;
  }
  public boolean need2Exit() {
    return need2Exit;
  }
}

package lab.sodino.errorreport;
import java.io.File;
import java.io.FileInputStream;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
public class ActOccurError extends Activity {
  private SoftApplication softApplication;
  /** Called when the activity is first created. */
  @Override
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.main);
    softApplication = (SoftApplication) getApplication();
    // 一开始进入程序恢复为"need2Exit=false"。
    softApplication.setNeed2Exit(false);
    Log.d("ANDROID_LAB", "ActOccurError.onCreate()");
    Button btnMain = (Button) findViewById(R.id.btnThrowMain);
    btnMain.setOnClickListener(new Button.OnClickListener() {
      public void onClick(View v) {
        Log.d("ANDROID_LAB", "Thread.main.run()");
        int i = 0;
        i = 100 / i;
      }
    });
    Button btnChild = (Button) findViewById(R.id.btnThrowChild);
    btnChild.setOnClickListener(new Button.OnClickListener() {
      public void onClick(View v) {
        new Thread() {
          public void run() {
            Log.d("ANDROID_LAB", "Thread.child.run()");
            int i = 0;
            i = 100 / i;
          }
        }.start();
      }
    });
    // 处理记录于error.log中的异常
    String errorContent = getErrorLog();
    if (errorContent != null) {
      Intent intent = new Intent(this, ActErrorReport.class);
      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      intent.putExtra("error", errorContent);
      intent.putExtra("by", "error.log");
      startActivity(intent);
    }
  }
  public void onStart() {
    super.onStart();
    if (softApplication.need2Exit()) {
      Log.d("ANDROID_LAB", "ActOccurError.finish()");
      ActOccurError.this.finish();
    } else {
      // do normal things
    }
  }
  /**
   * 读取是否有未处理的报错信息。<br/>
   * 每次读取后都会将error.log清空。<br/>
   *
   * @return 返回未处理的报错信息或null。
   */
  private String getErrorLog() {
    File fileErrorLog = new File(SoftApplication.PATH_ERROR_LOG);
    String content = null;
    FileInputStream fis = null;
    try {
      if (fileErrorLog.exists()) {
        byte[] data = new byte[(int) fileErrorLog.length()];
        fis = new FileInputStream(fileErrorLog);
        fis.read(data);
        content = new String(data);
        data = null;
      }
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      try {
        if (fis != null) {
          fis.close();
        }
        if (fileErrorLog.exists()) {
          fileErrorLog.delete();
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    return content;
  }
}

package lab.sodino.errorreport;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.TextView;
/**
 * @author Sodino E-mail:sodinoopen@hotmail.com
 * @version Time：2011-6-12 下午01:34:17
 */
public class ActErrorReport extends Activity {
  private SoftApplication softApplication;
  private String info;
  /** 标识来处。 */
  private String by;
  private Button btnReport;
  private Button btnCancel;
  private BtnListener btnListener;
  public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.report);
    softApplication = (SoftApplication) getApplication();
    by = getIntent().getStringExtra("by");
    info = getIntent().getStringExtra("error");
    TextView txtHint = (TextView) findViewById(R.id.txtErrorHint);
    txtHint.setText(getErrorHint(by));
    EditText editError = (EditText) findViewById(R.id.editErrorContent);
    editError.setText(info);
    btnListener = new BtnListener();
    btnReport = (Button) findViewById(R.id.btnREPORT);
    btnCancel = (Button) findViewById(R.id.btnCANCEL);
    btnReport.setOnClickListener(btnListener);
    btnCancel.setOnClickListener(btnListener);
  }
  private String getErrorHint(String by) {
    String hint = "";
    String append = "";
    if ("uehandler".equals(by)) {
      append = " when the app running";
    } else if ("error.log".equals(by)) {
      append = " when last time the app running";
    }
    hint = String.format(getResources().getString(R.string.errorHint), append, 1);
    return hint;
  }
  public void onStart() {
    super.onStart();
    if (softApplication.need2Exit()) {
      // 上一个退栈的Activity有执行“退出”的操作。
      Log.d("ANDROID_LAB", "ActErrorReport.finish()");
      ActErrorReport.this.finish();
    } else {
      // go ahead normally
    }
  }
  class BtnListener implements Button.OnClickListener {
    @Override
    public void onClick(View v) {
      if (v == btnReport) {
        // 需要 android.permission.SEND权限
        Intent mailIntent = new Intent(Intent.ACTION_SEND);
        mailIntent.setType("plain/text");
        String[] arrReceiver = { "sodinoopen@hotmail.com" };
        String mailSubject = "App Error Info[" + getPackageName() + "]";
        String mailBody = info;
        mailIntent.putExtra(Intent.EXTRA_EMAIL, arrReceiver);
        mailIntent.putExtra(Intent.EXTRA_SUBJECT, mailSubject);
        mailIntent.putExtra(Intent.EXTRA_TEXT, mailBody);
        startActivity(Intent.createChooser(mailIntent, "Mail Sending..."));
        ActErrorReport.this.finish();
      } else if (v == btnCancel) {
        ActErrorReport.this.finish();
      }
    }
  }
  public void finish() {
    super.finish();
    if ("error.log".equals(by)) {
      // do nothing
    } else if ("uehandler".equals(by)) {
      // 1.
      // android.os.Process.killProcess(android.os.Process.myPid());
      // 2.
      // ActivityManager am = (ActivityManager)
      // getSystemService(ACTIVITY_SERVICE);
      // am.restartPackage("lab.sodino.errorreport");
      // 3.
      // System.exit(0);
      // 1.2.3.都失效了，Google你让悲催的程序员情何以堪啊。
      softApplication.setNeed2Exit(true);
      // ////////////////////////////////////////////////////
      // // 另一个替换方案是直接返回“HOME”
      // Intent i = new Intent(Intent.ACTION_MAIN);
      // // 如果是服务里调用，必须加入newtask标识
      // i.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      // i.addCategory(Intent.CATEGORY_HOME);
      // startActivity(i);
      // ////////////////////////////////////////////////////
    }
  }
}

package lab.sodino.uncaughtexception;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileOutputStream;
import java.io.PrintStream;
import android.content.Intent;
import android.util.Log;
/**
 * @author Sodino E-mail:sodinoopen@hotmail.com
 * @version Time：2011-6-9 下午11:50:43
 */
public class UEHandler implements Thread.UncaughtExceptionHandler {
  private SoftApplication softApp;
  private File fileErrorLog;
  public UEHandler(SoftApplication app) {
    softApp = app;
    fileErrorLog = new File(SoftApplication.PATH_ERROR_LOG);
  }
  @Override
  public void uncaughtException(Thread thread, Throwable ex) {
    // fetch Excpetion Info
    String info = null;
    ByteArrayOutputStream baos = null;
    PrintStream printStream = null;
    try {
      baos = new ByteArrayOutputStream();
      printStream = new PrintStream(baos);
      ex.printStackTrace(printStream);
      byte[] data = baos.toByteArray();
      info = new String(data);
      data = null;
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      try {
        if (printStream != null) {
          printStream.close();
        }
        if (baos != null) {
          baos.close();
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
    // print
    long threadId = thread.getId();
    Log.d("ANDROID_LAB", "Thread.getName()=" + thread.getName() + " id=" + threadId + " state=" + thread.getState());
    Log.d("ANDROID_LAB", "Error[" + info + "]");
    if (threadId != 1) {
      // 此处示例跳转到汇报异常界面。
      Intent intent = new Intent(softApp, ActErrorReport.class);
      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      intent.putExtra("error", info);
      intent.putExtra("by", "uehandler");
      softApp.startActivity(intent);
    } else {
      // 此处示例发生异常后，重新启动应用
      Intent intent = new Intent(softApp, ActOccurError.class);
      // 如果<span style="background-color: rgb(255, 255, 255); ">没有NEW_TASK标识且</span>是UI线程抛的异常则界面卡死直到ANR
      intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
      softApp.startActivity(intent);
      // write 2 /data/data/<app_package>/files/error.log
      write2ErrorLog(fileErrorLog, info);
      // kill App Progress
      android.os.Process.killProcess(android.os.Process.myPid());
    }
  }
  private void write2ErrorLog(File file, String content) {
    FileOutputStream fos = null;
    try {
      if (file.exists()) {
        // 清空之前的记录
        file.delete();
      } else {
        file.getParentFile().mkdirs();
      }
      file.createNewFile();
      fos = new FileOutputStream(file);
      fos.write(content.getBytes());
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      try {
        if (fos != null) {
          fos.close();
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
    }
  }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical"
  android:layout_width="fill_parent"
  android:layout_height="fill_parent"
  >
  <TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/hello"
    />
  <Button android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Throws Exception By Main Thread"
    android:id="@+id/btnThrowMain"
  ></Button>
  <Button android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Throws Exception By Child Thread"
    android:id="@+id/btnThrowChild"
  ></Button>
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  android:orientation="vertical" android:layout_width="fill_parent"
  android:layout_height="fill_parent">
  <TextView android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="@string/errorHint"
    android:id="@+id/txtErrorHint" />
  <EditText android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:id="@+id/editErrorContent"
    android:editable="false" android:layout_weight="1"></EditText>
  <LinearLayout android:layout_width="fill_parent"
    android:layout_height="wrap_content" android:background="#96cdcd"
    android:gravity="center" android:orientation="horizontal">
    <Button android:layout_width="fill_parent"
      android:layout_height="wrap_content" android:text="Report"
      android:id="@+id/btnREPORT" android:layout_weight="1"></Button>
    <Button android:layout_width="fill_parent"
      android:layout_height="wrap_content" android:text="Cancel"
      android:id="@+id/btnCANCEL" android:layout_weight="1"></Button>
  </LinearLayout>
</LinearLayout>