Android開發(fā)遇到程序crash時(shí)，常常無(wú)法看到log，給開發(fā)調(diào)試帶來(lái)了不小的困難，通過下面的簡(jiǎn)單方法，可以有效的獲取log并輸出出來(lái)（通過Logcat、日志文件等等）。

自定義ExceptionHandler，繼承Thread.UncaughtExceptionHandler

public class TopExceptionHandler implements Thread.UncaughtExceptionHandler {

    private Thread.UncaughtExceptionHandler defaultUEH;

    private Activity app = null;

    public TopExceptionHandler(Activity app) {
        this.defaultUEH = Thread.getDefaultUncaughtExceptionHandler();
        this.app = app;
    }

    public void uncaughtException(Thread t, Throwable e) {
        StackTraceElement[] arr = e.getStackTrace();
        String report = e.toString() + "\n\n";
        report += "--------- Stack trace ---------\n\n";
        for (int i = 0; i < arr.length; i++) {
            report += "    " + arr[i].toString() + "\n";
        }
        report += "-------------------------------\n\n";
        //輸出到LogCat
        Log.e("XXX",report);
        //輸出到其他
        //TODO;
        defaultUEH.uncaughtException(t, e);
    }
}

在Activity中使用Handler

@Override
public void onCreate(Bundle savedInstanceState)
{
  super.onCreate(savedInstanceState);
  Thread.setDefaultUncaughtExceptionHandler(new TopExceptionHandler(this));
  //TODO;
  //……
}