android 自定义处理全局异常

android 自定义处理全局异常

一、创建异常：

public class MainActivity extends AppCompatActivity {    String nullString;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        Log.i("mytool", nullString.equals("")+"");    }}

二、自定义全局错误处理类：

/** * Created by liyihang on 17-7-14. * 用户为处理异常全局处理类 */public class CrashHandler implements Thread.UncaughtExceptionHandler {    private Thread.UncaughtExceptionHandler defaultUncaughtExceptionHandler;    private Context mContext;    private HashMap<String, String> infos=new HashMap<>();    private CrashHandler(){    }    public static CrashHandler instance=null;    public static CrashHandler getInstance(){        if (instance==null)        {            synchronized (CrashHandler.class)            {                if (instance==null)                {                    instance=new CrashHandler();                }            }        }        return instance;    }    /**     *     * 初始化获取默认错误处理机制     * 使用自定义错误类替换错误处理     * @param context 上下文     */    public void init(Context context){        mContext = context;        defaultUncaughtExceptionHandler = Thread.getDefaultUncaughtExceptionHandler();        Thread.setDefaultUncaughtExceptionHandler(this);    }    /**     *     * 系统异常处理回调     * @param thread     * @param throwable     */    @Override    public void uncaughtException(Thread thread, Throwable throwable) {        if (! handlerException(throwable) && defaultUncaughtExceptionHandler!=null)        {            //使用系统默认错误处理机制            defaultUncaughtExceptionHandler.uncaughtException(thread, throwable);        }else {            //暂停用来程序处理            try {                Thread.sleep(2300);            } catch (InterruptedException e) {                e.printStackTrace();            }            android.os.Process.killProcess(Process.myPid());            System.exit(1);        }    }    private boolean handlerException(Throwable throwable) {        if (throwable==null)        {            return false;        }        new Thread(new Runnable() {            @Override            public void run() {                Looper.prepare();                Toast.makeText(mContext, "application error exit",Toast.LENGTH_LONG).show();                Looper.loop();            }        }).start();        getDevicesInfo();        saveCrashInfo(throwable);        return true;    }    /**     *     * 保存系统异常信息     * @param throwable     */    private void saveCrashInfo(Throwable throwable) {        StringBuffer buffer=new StringBuffer();        Set<String> strings = infos.keySet();        for (String string : strings) {            buffer.append(string+"=="+infos.get(string)+"\n");        }        StringWriter stringWriter = new StringWriter();        PrintWriter printWriter = new PrintWriter(stringWriter);        throwable.printStackTrace(printWriter);        Throwable cause = throwable.getCause();        while (cause!=null)        {            cause.printStackTrace(printWriter);            cause = cause.getCause();        }        printWriter.close();        String s = stringWriter.toString();        Log.i("mytool", ""+s);        buffer.append(s);        try {            if (Environment.getExternalStorageState().equals(Environment.MEDIA_MOUNTED)){                File file=new File(Environment.getExternalStorageDirectory().getAbsolutePath()+"/error.txt");                FileOutputStream fileOutputStream=new FileOutputStream(file);                fileOutputStream.write(buffer.toString().getBytes());                fileOutputStream.flush();                fileOutputStream.close();            }        }catch (Exception e){            Log.i("mytool", "error info=="+e.getMessage());        }    }    /**     *     * 获取设备异常信息     */    private void getDevicesInfo() {        try {            PackageManager packageManager = mContext.getPackageManager();            PackageInfo packageInfo = packageManager.getPackageInfo(mContext.getPackageName(), PackageManager.GET_ACTIVITIES);            if (packageInfo!=null)            {                String versionName = packageInfo.versionName+"";                String versionCode = packageInfo.versionCode+"";                Log.i("mytool", "version name=="+versionName);                Log.i("mytool", "version code=="+versionCode);            }        }catch (Exception e){            Log.i("mytool", "error info=="+e.getMessage());        }        Field[] declaredFields = Build.class.getDeclaredFields();        for (Field declaredField : declaredFields) {            try {                declaredField.setAccessible(true);                infos.put(declaredField.getName(), declaredField.get(null).toString());                Log.i("mytool", declaredField.getName()+"=="+declaredField.get(null).toString());            }catch (Exception e){                Log.i("mytool", "error info=="+e.getMessage());            }        }    }}

三、在application中调用：

/** * Created by liyihang on 17-7-14. */public class MyAppliction extends Application {    @Override    public void onCreate() {        super.onCreate();        CrashHandler.getInstance().init(getApplicationContext());    }    @Override    public void onTerminate() {        super.onTerminate();    }}

四、设置主配置文件：

<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"    package="com.javadome.liyihang.javadome">    <uses-permission android:name="android.permission.INTERNET"/>    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>    <application        android:name=".MyAppliction"        android:allowBackup="true"        android:icon="@mipmap/ic_launcher"        android:label="@string/app_name"        android:roundIcon="@mipmap/ic_launcher_round"        android:supportsRtl="true"        android:theme="@style/AppTheme">        <activity android:name=".MainActivity">            <intent-filter>                <action android:name="android.intent.action.MAIN" />                <category android:name="android.intent.category.LAUNCHER" />            </intent-filter>        </activity>    </application></manifest>