Java 在执行线程期间更新UI
在我的应用程序中，我正在运行一个线程，其中执行了一些文本文件操作。在此期间，我还希望使用setText不断更新UI上的结果。请建议一条路Java 在执行线程期间更新UI,java,android,Java,Android,在我的应用程序中，我正在运行一个线程，其中执行了一些文本文件操作。在此期间，我还希望使用setText不断更新UI上的结果。请建议一条路 testThread = new Thread(){ public void run() { Log.i("TestApp","Test Thread Running"); runTest(); } }; 据我所知，在UI线程上执行
testThread = new Thread(){
public void run()
{
Log.i("TestApp","Test Thread Running");
runTest();
}
};
据我所知，在UI线程上执行耗时的操作以避免ANR是不好的。请建议一种可以同时完成这两项任务的方法。与其使用use AsyncTask，不如使用use AsyncTask，下面是一个示例
class GetStuffAsyncly extends AsyncTask<String, String, String> {
//What ever variables, you needed
@Override
protected String doInBackground(String... args) {
// do stuff in background...
//When you want to update something in the middle use the below method
publishProgress(Value);
return args[0];
}
/**
* After completing background task Dismiss the progress dialog
**/
protected void onPostExecute(String jsonString) {
//Here the thread execution ends.
}
@Override
protected void onProgressUpdate(String... values) {
super.onProgressUpdate(values);
//Here you will get the value what you want to update while running the thread.
}
}
private void runThread() {
new Thread() {
public void run() {
while (i++ < 1000) {
try {
runOnUiThread(new Runnable() {
@Override
public void run() {
//Do something on your UI
}
});
Thread.sleep(300);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
}.start();
}
private void runThread（）{
新线程（）{
公开募捐{
而（i++<1000）{
试一试{
runOnUiThread（新的Runnable（）{
@凌驾
公开募捐{
//在你的UI上做些什么
}
});
睡眠（300）；
}捕捉（中断异常e）{
e、 printStackTrace（）；
}
}
}
}.start（）；
}
final Handler handler = new Handler();
new Thread() {
public void run() {
// do time-consuming step 1
handler.post(new Runnable() {
public void run() {
// update UI after step 1
}
});
// do time-consuming step 2
handler.post(new Runnable() {
public void run() {
// update UI after step 2
}
});
// do time-consuming step 3
handler.post(new Runnable() {
public void run() {
// update UI after step 3
}
});
}
}.start();
Thread background=new Thread（new Runnable（））{
Thread background = new Thread(new Runnable() {
private final HttpClient Client = new DefaultHttpClient();
private String URL = "http://blahblahxxx.com/media/webservice/getPage.php";
// After call for background.start this run method call
public void run() {
try {
String SetServerString = "";
HttpGet httpget = new HttpGet(URL);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
SetServerString = Client.execute(httpget, responseHandler);
threadMsg(SetServerString);
} catch (Throwable t) {
// just end the background thread
Log.i("Animation", "Thread exception " + t);
}
}
private void threadMsg(String msg) {
if (!msg.equals(null) && !msg.equals("")) {
Message msgObj = handler.obtainMessage();
Bundle b = new Bundle();
b.putString("message", msg);
msgObj.setData(b);
handler.sendMessage(msgObj);
}
}
// Define the Handler that receives messages from the thread and update the progress
private final Handler handler = new Handler() {
public void handleMessage(Message msg) {
String aResponse = msg.getData().getString("message");
if ((null != aResponse)) {
// ALERT MESSAGE
Toast.makeText(
getBaseContext(),
"Server Response: "+aResponse,
Toast.LENGTH_SHORT).show();
}
else
{
// ALERT MESSAGE
Toast.makeText(
getBaseContext(),
"Not Got Response From Server.",
Toast.LENGTH_SHORT).show();
}
}
};
});
// Start Thread
background.start(); //After call start method thread called run Method
私有最终HttpClient客户端=新的DefaultHttpClient（）；
专用字符串URL=”http://blahblahxxx.com/media/webservice/getPage.php";
//在后台调用之后。启动此运行方法调用
公开募捐{
试一试{
字符串SetServerString=“”；
HttpGet HttpGet=新的HttpGet（URL）；
ResponseHandler ResponseHandler=新BasicResponseHandler（）；
SetServerString=Client.execute（httpget，responseHandler）；
threadMsg（SetServerString）；
}捕获（可丢弃的t）{
//只需结束背景线程
Log.i（“动画”、“线程异常”+t）；
}
}
私有void threadMsg（字符串msg）{
如果（！msg.equals（null）&&！msg.equals（“”）{
Message msgObj=handler.obtainMessage（）；
Bundle b=新Bundle（）；
b、 putString（“消息”，msg）；
msgObj.setData（b）；
handler.sendMessage（msgObj）；
}
}
//定义从线程接收消息并更新进度的处理程序
私有最终处理程序=新处理程序（）{
公共无效handleMessage（消息消息消息）{
字符串aResponse=msg.getData（）.getString（“消息”）；
如果（（null！=aResponse））{
//警报消息
Toast.makeText(
getBaseContext（），
“服务器响应：”+AresResponse，
吐司。长度（短）。show（）；
}
其他的
{
//警报消息
Toast.makeText(
getBaseContext（），
“未从服务器获得响应。”，
吐司。长度（短）。show（）；
}
}
};
});
//起始线程
background.start（）//调用启动方法后，线程调用run方法
doInBackground（）onPublishPrgress（）onPostExecute（） Thread background = new Thread(new Runnable() {
private final HttpClient Client = new DefaultHttpClient();
private String URL = "http://blahblahxxx.com/media/webservice/getPage.php";
// After call for background.start this run method call
public void run() {
try {
String SetServerString = "";
HttpGet httpget = new HttpGet(URL);
ResponseHandler<String> responseHandler = new BasicResponseHandler();
SetServerString = Client.execute(httpget, responseHandler);
threadMsg(SetServerString);
} catch (Throwable t) {
// just end the background thread
Log.i("Animation", "Thread exception " + t);
}
}
private void threadMsg(String msg) {
if (!msg.equals(null) && !msg.equals("")) {
Message msgObj = handler.obtainMessage();
Bundle b = new Bundle();
b.putString("message", msg);
msgObj.setData(b);
handler.sendMessage(msgObj);
}
}
// Define the Handler that receives messages from the thread and update the progress
private final Handler handler = new Handler() {
public void handleMessage(Message msg) {
String aResponse = msg.getData().getString("message");
if ((null != aResponse)) {
// ALERT MESSAGE
Toast.makeText(
getBaseContext(),
"Server Response: "+aResponse,
Toast.LENGTH_SHORT).show();
}
else
{
// ALERT MESSAGE
Toast.makeText(
getBaseContext(),
"Not Got Response From Server.",
Toast.LENGTH_SHORT).show();
}
}
};
});
// Start Thread
background.start(); //After call start method thread called run Method