最近发现之前开发的APP 在Android9.0上安装时提示如下恶心的提示：

度娘大部分技术是建议修改  android:targetSdkVersion="17"及以上版本

于是乎开始更新打包更新自己的APP，意外的事情发生了，闪退！！！

debuger 发现如下错误：

低版本Androidsdk下之前正常，现在升级target报错，肯定跟这个有关，因为代码没有问题但总是报错。最后查阅资料了解到，在Android 4.0以上，网络连接不能放在主线程上，不然就会报错android.os.NetworkOnMainThreadException。但是4.0下版本可以不会报错。

贴出改造后代码：仅适合本项目使用哦，需要的拿走

timer = new Timer(true);

startTime = System.currentTimeMillis();

timer.schedule(task, 2000, 2);

private  TimerTask task = new TimerTask() {

@Override

public void run() {

if (task.scheduledExecutionTime() - startTime >= 1000 || !_touched) {

Message message = new Message();

Log.i("SplashActivity", (task.scheduledExecutionTime() - startTime)+"");

if(isConnectInternet()){

TIME_UP=1;

message.what = TIME_UP;

Bundle data =  new  Bundle();

HttpURLConnection connection = null;

BufferedReader reader = null;

try {

URL url = new URL(url);

connection = (HttpURLConnection) url.openConnection();

connection.setRequestMethod("GET");

connection.setConnectTimeout(5000);

connection.setReadTimeout(5000);

InputStream in = connection.getInputStream();

//对获取到的输入流进行读取

reader = new BufferedReader(new InputStreamReader(in,"UTF-8"));

StringBuilder response = new StringBuilder();

String line;

while ((line = reader.readLine()) != null){

response.append(line);

}

data.putString("value",response.toString()) ;

} catch (Exception e) {

e.printStackTrace();

}finally {

if (reader != null){

try {

reader.close();

} catch (IOException e) {

e.printStackTrace();

}

}

if (connection != null){

connection.disconnect();

}

}

message.setData(data);

}else{

message.what = 2;

}

handler.sendMessage(message);

timer.cancel();

this.cancel();

}

}

};

Handler handler =  new  Handler(){

@Override

public void  handleMessage(Message msg) {

switch (msg.what) {

case 1:

Bundle data = msg.getData();

String jsonStr = data.getString("value");

if (jsonStr.length() > 1) {

try {

jsonObject = new JSONObject(jsonStr.substring(1,

jsonStr.length() - 1));

linkUrl = jsonObject.getString("url")  ；

} catch (JSONException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

Intent intent = new Intent();

intent.setClass(MainActivity.this, WebviewActivity.class);

intent.putExtra("url", linkUrl);

intent.putExtra("type", "other");

startActivity(intent);

overridePendingTransition(R.anim.main_enter, R.anim.main_exit);

MainActivity.this.finish();

}

break;

case 2:

exit();

break;

}

super.handleMessage(msg);

}

};