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 = { "[email protected]" };
							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>

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