使用 CrashHandler 来获取应用的 crash 信息

CrashHandler.java

package com.xxx.utils;

import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintWriter;
import java.lang.Thread.UncaughtExceptionHandler;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.Log;

import android.content.Context;
import android.content.pm.PackageInfo;
import android.content.pm.PackageManager;
import android.content.pm.PackageManager.NameNotFoundException;
import android.os.Build;
import android.os.Environment;
import android.os.Process;

public class CrashHandler implements UncaughtExceptionHandler {
	private static final String TAG = "CrashHandler";

	private static final String PATH = Environment.getExternalStorageDirectory().getPath() + "/xxx/log/";
	private static final String FILE_NAME = "crash";
	private static final String FILE_NAME_SUFFIX = ".trace";

	private static CrashHandler sInstance = new CrashHandler();
	private UncaughtExceptionHandler mDefaultCrashHandler;
	private Context mContext;

	private CrashHandler() {
	}

	public static CrashHandler getInstance() {
		return sInstance;
	}

	public void init(Context context) {
		mDefaultCrashHandler = Thread.getDefaultUncaughtExceptionHandler();
		Thread.setDefaultUncaughtExceptionHandler(this);
		mContext = context.getApplicationContext();
	}

	/**
	 * 这个是最关键的函数，当程序中有未被捕获的异常，系统将会自动调用#uncaughtException方法
	 * thread为出现未捕获异常的线程，ex为未捕获的异常，有了这个ex，我们就可以得到异常信息。
	 */
	@Override
	public void uncaughtException(Thread thread, Throwable ex) {
		try {
			// 导出异常信息到SD卡中
			dumpExceptionToSDCard(ex);
			uploadExceptionToServer();
			// 这里可以通过网络上传异常信息到服务器，便于开发人员分析日志从而解决bug
		} catch (IOException e) {
			e.printStackTrace();
		}

		ex.printStackTrace();

		// 如果系统提供了默认的异常处理器，则交给系统去结束我们的程序，否则就由我们自己结束自己
		if (mDefaultCrashHandler != null) {
			mDefaultCrashHandler.uncaughtException(thread, ex);
		} else {
			Process.killProcess(Process.myPid());
		}

	}

	private void dumpExceptionToSDCard(Throwable ex) throws IOException {
		// 如果SD卡不存在或无法使用，则无法把异常信息写入SD卡
		if (!Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)) {
			Log.w(TAG, "sdcard unmounted,skip dump exception");
			return;
		}

		File dir = new File(PATH);
		if (!dir.exists()) {
			dir.mkdirs();
		}
		long current = System.currentTimeMillis();
		String time = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.CHINA).format(new Date(current));
		File file = new File(PATH + FILE_NAME + time + FILE_NAME_SUFFIX);

		try {
			PrintWriter pw = new PrintWriter(new BufferedWriter(new FileWriter(file)));
			pw.println(time);
			dumpPhoneInfo(pw);
			pw.println();
			ex.printStackTrace(pw);
			pw.close();
		} catch (Exception e) {
			Log.e(TAG, "dump crash info failed");
		}
	}

	private void dumpPhoneInfo(PrintWriter pw) throws NameNotFoundException {
		PackageManager pm = mContext.getPackageManager();
		PackageInfo pi = pm.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);
		pw.print("App Version: ");
		pw.print(pi.versionName);
		pw.print('_');
		pw.println(pi.versionCode);

		// android版本号
		pw.print("OS Version: ");
		pw.print(Build.VERSION.RELEASE);
		pw.print("_");
		pw.println(Build.VERSION.SDK_INT);

		// 手机制造商
		pw.print("Vendor: ");
		pw.println(Build.MANUFACTURER);

		// 手机型号
		pw.print("Model: ");
		pw.println(Build.MODEL);

		// cpu架构
		pw.print("CPU ABI: ");
		pw.println(Build.SUPPORTED_ABIS);
	}

	private void uploadExceptionToServer() {
		// TODO Upload Exception Message To Your Web Server
	}

}

Add below code in Application's onCreate method.

CrashHandler crashHandler = CrashHandler.getInstance();
crashHandler.init(context);