在开发过程中或者在程序正式上线以后，总是或多或少的出现程序崩溃的情况，大多是程序在测试的时候，没有完整测试。此时，自定义全局未处理异常捕捉器就显得非常有用了
实现步骤：
- 自定义全局未处理异常捕捉器，需要实现
UncaughtExceptionHandler接口，并重写uncaughtException(Thread thread, Throwable ex)方法 - 在
Application或者主页面Activity或者某个Activity中，调用方法Thread.setDefaultUncaughtExceptionHandler，设置自定义的异常捕捉器为默认的全局异常捕捉器
实现栗子
在主页面中设置异常捕捉器，在第二个界面中发生异常，提示用户程序崩溃，将异常原因以文本形式保存到本地，重新启动程序进入主页面
自定义异常捕捉器：
public class MyExceptionHanlder implements UncaughtExceptionHandler {
private Context mContext = null;
private String className = "";
public MyExceptionHanlder(Context context) {
this.mContext = context;
}
public MyExceptionHanlder(Context context, String className) {
this.mContext = context;
this.className = className;
}
/**
* 当自定义的异常捕获异常处理器被设置为此APP默认的异常处理器，
* 发生未处理异常时，此方法会被自动调用
* @param thread 所发生异常所在的线程
* @param ex 抛出的未处理异常Throwable对象
*/
@Override
public void uncaughtException(Thread thread, Throwable ex) {
if (ex != null) {
Log.i("UncaughtException", ex.getMessage());
StringBuilder sb = new StringBuilder();
String temp = ex.getMessage();
if (temp != null) {
sb.append("ex.getMessage()：");
sb.append(System.getProperty("line.separator"));
sb.append(temp);
}
sb.append(System.getProperty("line.separator"));
sb.append("thread.getName()：" + thread.getName());
sb.append(System.getProperty("line.separator"));
sb.append(" Trace: " + System.getProperty("line.separator"));
StackTraceElement[] elements = ex.getStackTrace();
if (elements != null) {
for (StackTraceElement element : elements) {
temp = element.toString();
if (temp != null) {
sb.append(temp);
}
sb.append(System.getProperty("line.separator"));
}
}
sb.append("Cause: ");
sb.append(System.getProperty("line.separator"));
Throwable theCause = ex.getCause();
if (theCause != null) {
temp = theCause.toString();
if (temp != null) {
sb.append(temp);
}
}
sb.append(System.getProperty("line.separator") + " Cause Stack: " +
System.getProperty("line.separator"));
theCause = ex.getCause();
if (theCause != null) {
elements = theCause.getStackTrace();
if (elements != null) {
for (StackTraceElement element : elements) {
temp = element.toString();
if (temp != null) {
sb.append(temp);
}
sb.append(System.getProperty("line.separator"));
}
}
}
try {
//将异常信息存入本地文件
this.writeCrashLog(sb);
} catch (Exception e) {
e.printStackTrace();
}
//弹出自定义处理异常界面
Intent intent = new Intent(mContext, ExceptionDialog.class);
intent.putExtra("className", className);
mContext.startActivity(intent);
//销毁页面，杀死APP进程
crash(mContext);
}
}
/**
* 将异常信息存入本地信息
* @param sb StringBuilder对象
* @throws Exception 抛出异常对象
*/
private void writeCrashLog(StringBuilder sb) throws Exception {
//存储路径
String path = Environment.getExternalStorageDirectory() + "/crashLog.txt";
Log.d("Main", path);
File logFile = new File(path);
if (!logFile.exists()){
logFile.createNewFile();
}else{
logFile.delete();
logFile.createNewFile();
}
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(logFile));
bufferedWriter.write(sb.toString());
bufferedWriter.close();
Toast.makeText(mContext, "写入成功", Toast.LENGTH_LONG).show();
}
/**
* 销毁页面以及关闭APP进程
* @param context 上下文对象
* @return 是否销毁页面以及当前进程
*/
public static boolean crash(Context context) {
if (context == null) {
return false;
}
//销毁页面
if (context instanceof Activity) {
((Activity) context).finish();
}
//杀死APP进程
Process.killProcess(Process.myPid());
return true;
}
**源文件下载地址：http://download.csdn.net/detail/xiaoshengfdyh/9704576**