Android 多线程handler,runnable,asyctask使用

1：handler/thread，更新UI
//工作线程，在HandlerActivity doClick()方法中，获取数据后通过message发送数据Bitmap

new Thread() {            public void run() {                try {                    HttpEntity entity = service.getEntity("http://172.60.5.68:8080/time/1.jpg",                            null, HttpService.METHOD_GET);                    InputStream is = service.getStream(entity);                    Bitmap bm = BitmapFactory.decodeStream(is);                    // 发消息回主线程                    Message msg = Message.obtain();                    msg.obj = bm;                    handler.sendMessage(msg);                } catch (ConnectTimeoutException e) {                    e.printStackTrace();                } catch (IOException e) {                    e.printStackTrace();                }            };        }.start();

//主线程，在HandlerActivity onCreate()方法中，接收图片数据Bitmap并更新UI

service = new HttpService();        handler = new Handler() {            public void handleMessage(Message msg) {                // 获取Bitmap                Bitmap bm = (Bitmap) msg.obj;                // 更新Imageview                if (bm != null) {                    ivPic.setImageBitmap(bm);                } else {                    ivPic.setImageResource(R.drawable.ic_launcher);                }            }        };

2：handler/runnable，更新UI
//工作线程，在Handler_PostActivity中创建工作线程Runnable，完成耗时任务获取数据后runable直接更新UI

Runnable runnable = new Runnable() {        public void run() {            try {                HttpEntity entity = service.getEntity("http://172.60.5.68:8080/time/1.jpg",                        null, HttpService.METHOD_POST);                InputStream is = service.getStream(entity);                final Bitmap bm = BitmapFactory.decodeStream(is);                //直接更新UI                if (bm != null) {                    ivPic.setImageBitmap(bm);                } else {                    ivPic.setImageResource(R.drawable.ic_launcher);                }            } catch (ConnectTimeoutException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }        }        };

//主线程：在Handler_PostActivity doClick()方法中发送post runnable

Handler handler = new Handler();          handler.post(runnable);

3:handler/AsyncTask:
AsyncTaskActivity类中:
工作线程:

public static final String URI = "http://172.60.5.68:8080/time/1.jpg";    class MyTask extends AsyncTask<String, String, Bitmap> {        protected void onPreExecute() {            iv.setImageResource(R.drawable.ic_launcher);        }        protected Bitmap doInBackground(String... params) {            Bitmap bm = null;            try {                publishProgress("准备下载");                HttpEntity entity = HttpUtils.getEntity(params[0], null,                        HttpUtils.METHOD_GET);                InputStream is = HttpUtils.getStream(entity);                bm = BitmapFactory.decodeStream(is);            } catch (ConnectTimeoutException e) {                e.printStackTrace();            } catch (IOException e) {                e.printStackTrace();            }            return bm;        }        protected void onProgressUpdate(String... values) {        }        protected void onPostExecute(Bitmap result) {            if (result != null) {                iv.setImageBitmap(result);            } else {                Toast.makeText(Day14_02_AsyncTaskActivity.this, "获取图片失败",                        Toast.LENGTH_LONG).show();            }        }        protected void onCancelled() {            super.onCancelled();            cancel(true);        }    }

主线程:

public void doClick(View v) {        MyTask task = new MyTask();        task.execute(URI);    }

4：handler.sendMessage()，更新UI
//工作线程，在StuDemoActivity setupView()方法中，获取数据后通过message发送数据students

new Thread() {            public void run() {                try {                    InputStream is = service.execute(HttpService.BASE_URL+ "stu_server/student", null, HttpUtils.METHOD_GET);                    ArrayList<Student> students = parser.parse(is, "utf-8");                    // 加载解析完成，发消息回主线程                    Message msg = Message.obtain();                    msg.what = 1;                    msg.obj = students;                    handler.sendMessage(msg);                } catch (ConnectTimeoutException e) {                    e.printStackTrace();                    handler.sendEmptyMessage(0);                } catch (Exception e) {                    e.printStackTrace();                }            };        }.start();

//主线程，在StuDemoActivity onCreate()方法中，接收消息数据students并更新UI

this.handler = new Handler() {            public void handleMessage(android.os.Message msg) {                switch (msg.what) {                case 1:// 更新listView                    ArrayList<Student> students = (ArrayList<Student>) msg.obj;                    adapter.changeData(students);                    break;                case 0:// 连接超时                    Log.i("info", "连接超时异常提示。");                    Toast.makeText(Day11_04_StuDemoActivity.this, "网络连接超时",3000).show();                    break;                }            };        };

5：handler.sendMessage()，耗时任务
//工作线程，在AsyncImageLoader AsyncImageLoader()构造方法中，获取数据后通过message发送数据ImageLoadTask

isLoop = true;        tasks = new ArrayList<ImageLoadTask>();        workThread = new Thread() {            public void run() {                Log.i("info", Thread.currentThread().getName() + " is started");                while (isLoop) {                    while (tasks.size() > 0 && isLoop) {                        ImageLoadTask task = tasks.remove(0);                        try {                            byte[] data = service.getBytes(HttpService.BASE_URL                                    + task.path, null, HttpUtils.METHOD_GET);                            task.bitmap = BitmapUtils.getBitmap(data, 100, 100);                            // 发送消息回主线程                            Message msg = Message.obtain();                            msg.what = 0;                            msg.obj = task;                            handler.sendMessage(msg);                            // 缓存图片                            caches.put(task.path, new SoftReference<Bitmap>(task.bitmap));                            File savePath = new File("/mnt/sdcard/" + task.path);                            BitmapUtils.save(task.bitmap, savePath);                        } catch (ConnectTimeoutException e) {                            e.printStackTrace();                        } catch (IOException e) {                            e.printStackTrace();                        }                    }                    if (isLoop == false)                        break;                    // 如果任务集合中的任务都执行完成，线程等待                    synchronized (this) {                        try {                            this.wait();                        } catch (InterruptedException e) {                            e.printStackTrace();                        }                    }                }                Log.i("info", Thread.currentThread().getName()+ " is finished");            };        };        workThread.start();    class ImageLoadTask {        private String path;        private Bitmap bitmap;        private Callback callback;        public boolean equals(Object o) {            ImageLoadTask task = (ImageLoadTask) o;            return this.path.equals(task.path);        }        }    public interface Callback {        void imageLoaded(String path, Bitmap bm);        }

//主线程，在AsyncImageLoader AsyncImageLoader()构造方法中，接收ImageLoadTask并加载

service = new HttpService();        caches = new HashMap<String, SoftReference<Bitmap>>();        handler = new Handler() {            public void handleMessage(Message msg) {                switch (msg.what) {                case 0:// 图片加载成功                    ImageLoadTask task = (ImageLoadTask) msg.obj;                    task.callback.imageLoaded(task.path, task.bitmap);                    break;                }            }        };

6：handler.sendMessage()，耗时任务
//工作线程—-在MusicService(继承IntentService) onHandleIntent（）方法中，该方法运行于工作线程，通过message发送savePath

String path = intent.getStringExtra("path");        File savePath = new File("/mnt/sdcard/" + path);        if (savePath.exists()) {            Message msg = Message.obtain();            msg.what = MSG_TAG_FILE_EXISTS;            msg.obj = savePath;            handler.sendMessage(msg);            return;        }        try {// 连接服务端            HttpEntity entity = HttpUtils.getEntity(                    HttpService.BASE_URL + path, null, HttpUtils.METHOD_GET);            // 获取文件名和文件长度            fileName = savePath.getName();            fileLength = HttpUtils.getLength(entity);            // 发送消息到主线程 ，开始下载            handler.sendEmptyMessage(MSG_TAG_STARTED);            // 下载            InputStream is = HttpUtils.getStream(entity);            StreamUtils.save(is, savePath, handler);            // 发送消息到主线程 下载成功            handler.sendEmptyMessage(MSG_TAG_SUCCESSED);        } catch (ConnectTimeoutException e) {            e.printStackTrace();            handler.sendEmptyMessage(MSG_TAG_FAILED);        } catch (FileNotFoundException e) {            e.printStackTrace();            handler.sendEmptyMessage(MSG_TAG_FAILED);        } catch (IOException e) {            e.printStackTrace();            handler.sendEmptyMessage(MSG_TAG_FAILED);        }

//主线程—-在MusicService onCreate（）方法中接收savePath并处理消息

handler = new Handler() {            public void handleMessage(Message msg) {                switch (msg.what) {                case MSG_TAG_FILE_EXISTS:                    String info = "文件已存在，请勿重复下载:"+ ((File) msg.obj).getAbsolutePath();                    Toast.makeText(MusicService.this, info, 3000).show();                    break;                case MSG_TAG_STARTED:// 开始下载，发通知到通知栏                    noti.contentView.setTextViewText(R.id.tvName_Noti, fileName);                    noti.contentView.setTextViewText(R.id.tvProgress_Noti,fileSizeFormat(0));                    noti.contentView.setTextViewText(R.id.tvTotalLength_Noti,fileSizeFormat(fileLength));                    noti.contentView.setProgressBar(R.id.pbDownload_Noti,(int) fileLength, 0, false);                    manager.notify(NOTI_ID, noti);                    break;                case StreamUtils.MSG_TAG_CURRENT_PROGRESS:// 更新通知的下载进度                    int loadedLength = msg.arg1 * 1024;                    noti.contentView.setTextViewText(R.id.tvProgress_Noti,fileSizeFormat(loadedLength));                    noti.contentView.setProgressBar(R.id.pbDownload_Noti,(int) fileLength, loadedLength, false);                    manager.notify(NOTI_ID, noti);                    break;                case MSG_TAG_FAILED:// 下载失败                    Notification noti1 = new Notification(android.R.drawable.ic_dialog_alert, "警告", System                                    .currentTimeMillis());                    noti1.setLatestEventInfo(MusicService.this, "下载失败","音乐下载失败", contentIntent);                    noti1.flags = Notification.FLAG_AUTO_CANCEL;                    noti1.defaults = Notification.DEFAULT_LIGHTS;                    manager.notify(0, noti1);                    break;                case MSG_TAG_SUCCESSED:// 下载成功                    manager.cancel(NOTI_ID);                }            }        };

7:工作线程是独立一个类:

protected void updateUserSetting() {        handler = null;        handler = new Handler() {            @Override            public void handleMessage(Message msg) {                switch (msg.what) {                case ConstantInfo.GET_DATA_OK01:                    user = (User) msg.obj;                    HuhangApplication.getHuhangApplication().setUser(user);                    break;                case ConstantInfo.NET_WRONG:                    Toast.makeText(getBaseContext(), "网络异常 请检查您的网络",                            Toast.LENGTH_SHORT).show();                    break;                case ConstantInfo.TOKEN_EXPRISSED:                    TokenExprissed exprissed = new TokenExprissed(                            FSPointActivity.this);                    exprissed.toLogin();                    break;                default:                    break;                }                dismissPopuBar();            }        };        new UpdateSettingThread(this, "0", settingValue + "", sp, handler)                .start();    }

8:获取验证码方法供调用:

private void GetCode() {        getCodeHandler = new Handler() {            public void handleMessage(Message msg) {                switch (msg.what) {                case GET_CODE_CODE_OK:                    if (mobileVerifyCodeBean.getReturnCode().equals("0")                            && mobileVerifyCodeBean.getErrorCode().equals("0")) {                        Log.i("info", "服务器已发送验证码！");                        Toast.makeText(RegisterCheckMobileActivity.this,                                "验证短信已发送 请注意查收", Toast.LENGTH_SHORT).show();                        getCodeButton.setClickable(false);                        getCodeButton.setTextColor(getResources().getColor(                                R.color.lightGray));                        // 延时1分钟,才可再次获取验证码                        Timer timer = new Timer();                        timer.schedule(new TimerTask() {                            public void run() {                                getCodeHandler                                        .sendEmptyMessage(BUTTON_CLICK_TRUE);                            }                        }, 1000 * 60);                        // 设置提示语可见                        // noteText.setVisibility(EditText.VISIBLE);                        Editor editor = sp.edit();                        editor.putString("accessToken",                                mobileVerifyCodeBean.getAccessToken());                        editor.putString("timestamp",                                mobileVerifyCodeBean.getTimestamp());                        editor.putString("mobileNumber",                                mobileVerifyCodeBean.getMobileNumber());                        editor.commit();                    } else if (mobileVerifyCodeBean.getReturnCode().equals("3")                            && mobileVerifyCodeBean.getErrorCode().equals(                                    "30123")) {                        editTextChange.changeToRed(registerMobileNumber);                        Toast.makeText(RegisterCheckMobileActivity.this,                                "该手机号已经被注册 请更换其他号码", Toast.LENGTH_SHORT).show();                        getCodeButton.setClickable(true);                        getCodeButton.setTextColor(getResources().getColor(                                R.color.darkGray));                        // nextButton.setClickable(false);                        // nextButton.setTextColor(android.R.color.darker_gray);                    }                    break;                case BUTTON_CLICK_FALSE:                    getCodeButton.setClickable(false);                    getCodeButton.setTextColor(getResources().getColor(                            R.color.lightGray));                    break;                case BUTTON_CLICK_TRUE:                    getCodeButton.setClickable(true);                    getCodeButton.setTextColor(getResources().getColor(                            R.color.darkGray));                    break;                default:                    Toast.makeText(RegisterCheckMobileActivity.this,                            "网络连接异常，请连接您的网络！", Toast.LENGTH_SHORT).show();                    getCodeButton.setClickable(true);                    getCodeButton.setTextColor(getResources().getColor(                            R.color.darkGray));                    break;                }                dismissPopuBar();            };        };        // 获取验证码的线程        new Thread() {            public void run() {                getCodeHandler.sendEmptyMessage(BUTTON_CLICK_FALSE);                // 发送请求，获取验证码                if (netTool.checkNetIsAvailable()) {                    try {                        // 获取验证码的请求的返回信息                        getCodeResult = HttpConnectionManager                                .GetMoobileVerifyCode(mobileNumber, 1);                        Log.i("info", "获取验证码结果" + getCodeResult);                        // 创建一个验证码返回信息对象                        mobileVerifyCodeBean = gson.fromJson(getCodeResult,                                MobileVerifyCodeBean.class);                        if (mobileVerifyCodeBean != null) {                            // 向主线程发消息，获取验证码返回信息成功                            Message msg = new Message();                            msg.what = GET_CODE_CODE_OK;                            getCodeHandler.sendMessage(msg);                        }                    } catch (Exception e) {                        // 获取失败                        e.printStackTrace();                        getCodeHandler.sendEmptyMessage(0);                    }                } else {                    // 获取失败                    getCodeHandler.sendEmptyMessage(0);                }            };        }.start();    }

9:保存用户数据工作线程方法:

private void SaveInfo() {        titleRightButton.setClickable(false);        final Handler saveHandler = new Handler() {            public void handleMessage(android.os.Message msg) {                dismissPopuBar();                UserBean ub = (UserBean) msg.obj;                switch (msg.what) {                case SAVE_USER_INFO_OK:                    user = ub.getUser();                    HuhangApplication.getHuhangApplication().setUser(user);                    showUserInfo();                    updateInfo();                    Toast.makeText(UserInfoActivity.this, "保存成功",                            Toast.LENGTH_SHORT).show();                    break;                case SAVE_USER_INFO_FAIL:                    Toast.makeText(UserInfoActivity.this, "保存信息失败",                            Toast.LENGTH_SHORT).show();                    break;                case USER_NOT_FOUND:                    Toast.makeText(UserInfoActivity.this, "该账户已被注销",                            Toast.LENGTH_SHORT).show();                    break;                case NET_WRONG:                    Toast.makeText(UserInfoActivity.this, "网络连接异常 请检查您的网络",                            Toast.LENGTH_SHORT).show();                    break;                case ConstantInfo.TOKEN_EXPRISSED:                    TokenExprissed exprissed = new TokenExprissed(                            getApplicationContext());                    exprissed.toLogin();                default:                    break;                }                titleRightButton.setClickable(true);            };        };        new Thread() {            String result = null;            public void run() {                List<NameValuePair> postParameters = new ArrayList<NameValuePair>();                postParameters.add(new BasicNameValuePair("accessToken", sp                        .getString("accessToken", "")));                postParameters.add(new BasicNameValuePair("timestamp", sp                        .getString("timestamp", "")));                postParameters.add(new BasicNameValuePair("appId",                        ConstantUrl.APPID));                postParameters.add(new BasicNameValuePair("accountId", sp                        .getString("accountId", "")));                if (firstName.isShown()) {                    postParameters.add(new BasicNameValuePair("lastName",                            getTextValue(secondName)));                    postParameters.add(new BasicNameValuePair("firstName",                            getTextValue(firstName)));                }                postParameters.add(new BasicNameValuePair("email",                        getTextValue(email)));                postParameters.add(new BasicNameValuePair("province",                        (province) + ""));                postParameters.add(new BasicNameValuePair("address",                        toUTF8(getTextValue(address))));                postParameters.add(new BasicNameValuePair("zipCode",                        getTextValue(zipCode)));                postParameters.add(new BasicNameValuePair("homePhone",                        getTextValue(phone)));                postParameters.add(new BasicNameValuePair("timeZone", timeZone                        + ""));                try {                    result = HttpConnectionManager.getDataFromHttp(                            ConstantUrl.UPDATE_USER_URL, postParameters);                    Log.i("info", "saveUserInfo:" + result);                } catch (Exception e) {                    saveHandler.sendEmptyMessage(NET_WRONG);                    e.printStackTrace();                }                UserBean ub = gson.fromJson(result, UserBean.class);                if (ub.getReturnCode().equals("0")                        && ub.getErrorCode().equals("0")) {                    Message msg = new Message();                    msg.obj = ub;                    msg.what = SAVE_USER_INFO_OK;                    saveHandler.sendMessage(msg);                } else if (ub.getReturnCode().equals("1")                        && ub.getErrorCode().equals("10100")) {                    saveHandler.sendEmptyMessage(USER_NOT_FOUND);                } else if (ub.getReturnCode().equals("3")                        && ub.getErrorCode().equals("30303")) {                    saveHandler.sendEmptyMessage(ConstantInfo.TOKEN_EXPRISSED);                } else {                    saveHandler.sendEmptyMessage(SAVE_USER_INFO_FAIL);                }            };        }.start();    }