我怎样才能延缓TextView的输出？ [英] How can I delay the textview output?

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问题描述

我用下面的code连接到WIFI网络。有没有一种方法，我可以推迟的TextView文本的输出，以便它不显示，直到它被连接到无线网络？该消息来了它实际上是连接前。

 进口的java.util.List;
进口android.app.Activity;
进口android.os.Bundle;
进口android.content.Context;
进口android.net.ConnectivityManager;
进口android.net.NetworkInfo;
进口android.net.wifi.WifiConfiguration;
进口android.net.wifi.WifiManager;
进口android.util.Log;
进口android.view.View;
进口android.view.View.OnClickListener;进口android.widget.Button;
进口android.widget.TextView;公共类测试活动扩展了活动{
/ **当第一次创建活动调用。
 * @返回* /@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
    super.onCreate（savedInstanceState）;
    的setContentView（R.layout.main）;
    按钮OffWifi =（按钮）findViewById（R.id.offwifi）;
    OffWifi.setOnClickListener（新OnClickListener（）{
      公共无效的onClick（视图v）{          WifiManager wifiManager =（WifiManager）getBaseContext（）getSystemService（Context.WIFI_SERVICE）。
            wifiManager.setWifiEnabled（假）;
          }
      }）;
    TextView的电视=（的TextView）findViewById（R.id.tv）;    WifiManager无线=（WifiManager）getSystemService（Context.WIFI_SERVICE）;
    WifiConfiguration WC =新WifiConfiguration（）;
    wc.SSID =\\测试\\; // IMP！这应该是行情！    wc.hiddenSSID = TRUE;
    wc.status = WifiConfiguration.Status.ENABLED;
    wc.priority = 10;
    wc.allowedKeyManagement.set（WifiConfiguration.KeyMgmt.WPA_PSK）;
    wc.allowedProtocols.set（WifiConfiguration.Protocol.RSN）;
    wc.allowedProtocols.set（WifiConfiguration.Protocol.WPA）;
    wc.allowedAuthAlgorithms.set（WifiConfiguration.AuthAlgorithm.OPEN）;
    wc.allowedAuthAlgorithms.set（WifiConfiguration.AuthAlgorithm.SHARED）;
    wc.allowedPairwiseCiphers.set（WifiConfiguration.PairwiseCipher.CCMP）;
    wc.allowedPairwiseCiphers.set（WifiConfiguration.PairwiseCipher.TKIP）;
    WC preSharedKey =\\密码\\。
    WifiManager wifiManag =（WifiManager）this.getSystemService（WIFI_SERVICE）;
    布尔RES1 = wifiManag.setWifiEnabled（真）;
    INT解析度= wifi.addNetwork（检查previousConfiguration（WC））;
    Log.d（无线preference，添加网络返回+ RES）;
    布尔ES = wifi.saveConfiguration（）;
    Log.d（无线preference，saveConfiguration返回+ ES）;
    布尔B = wifi.enableNetwork（RES，真）;
    Log.d（无线preference，enableNetwork返回+ B）;         ConnectivityManager CONNEC =（ConnectivityManager）getSystemService（Context.CONNECTIVITY_SERVICE）;         如果（CONNEC =空＆放大器;！及（connec.getNetworkInfo（1）.getState（）== NetworkInfo.State.CONNECTED）||（connec.getNetworkInfo（0）.getState（）== NetworkInfo.State.CONNECTED） ）{             tv.setText（你现在已经连接！+1.1版）;
            }否则如果（connec.getNetworkInfo（0）.getState（）== NetworkInfo.State.DISCONNECTED || connec.getNetworkInfo（1）.getState（）== NetworkInfo.State.DISCONNECTED）{                tv.setText（以下简称连接是一个错误，请重试）;
            }    }
 公共WifiConfiguration检查previousConfiguration（WifiConfiguration WC）{
WifiManager无线=（WifiManager）getSystemService（Context.WIFI_SERVICE）;
 清单＆LT; WifiConfiguration＆GT; CONFIGS = wifi.getConfiguredNetworks（）;
    对于（WifiConfiguration配置：CONFIGS）{
        如果（config.SSID.equals（wc.SSID））返回配置;
        }
    返回厕所;
    }}


解决方案

使用的AsyncTask ，并把连接在 doInBackground ，的setText 放进 onPostExecute 

 公共类连接扩展的AsyncTask＆LT;弦乐，太虚，布尔＆GT; {私人活动活动;
私人上下文的背景下;公共LoadContacts（活动活动）{
    this.activity =活动;
    上下文=活动;
}@覆盖
在preExecute保护无效（）{
    // TODO自动生成方法存根
    super.on preExecute（）;}@覆盖
保护无效onPostExecute（布尔结果）{
    TextView的电视=（TextView中）activity.findViewById（R.id.tv）;
    如果（CONNEC =空＆放大器;！及（connec.getNetworkInfo（1）.getState（）== NetworkInfo.State.CONNECTED）||（connec.getNetworkInfo（0）.getState（）== NetworkInfo.State.CONNECTED） ）{         tv.setText（你现在已经连接！+1.1版）;
        }否则如果（connec.getNetworkInfo（0）.getState（）== NetworkInfo.State.DISCONNECTED || connec.getNetworkInfo（1）.getState（）== NetworkInfo.State.DISCONNECTED）{            tv.setText（以下简称连接是一个错误，请重试）;
        }
    super.onPostExecute（）;
}@覆盖
保护布尔doInBackground（字符串... PARAMS）{
    WifiManager无线=（WifiManager）activity.getSystemService（Context.WIFI_SERVICE）;
WifiConfiguration WC =新WifiConfiguration（）;
wc.SSID =\\测试\\; // IMP！这应该是行情！wc.hiddenSSID = TRUE;
wc.status = WifiConfiguration.Status.ENABLED;
wc.priority = 10;
wc.allowedKeyManagement.set（WifiConfiguration.KeyMgmt.WPA_PSK）;
wc.allowedProtocols.set（WifiConfiguration.Protocol.RSN）;
wc.allowedProtocols.set（WifiConfiguration.Protocol.WPA）;
wc.allowedAuthAlgorithms.set（WifiConfiguration.AuthAlgorithm.OPEN）;
wc.allowedAuthAlgorithms.set（WifiConfiguration.AuthAlgorithm.SHARED）;
wc.allowedPairwiseCiphers.set（WifiConfiguration.PairwiseCipher.CCMP）;
wc.allowedPairwiseCiphers.set（WifiConfiguration.PairwiseCipher.TKIP）;
WC preSharedKey =\\密码\\。
WifiManager wifiManag =（WifiManager）context.getSystemService（WIFI_SERVICE）;
布尔RES1 = wifiManag.setWifiEnabled（真）;
INT解析度= wifi.addNetwork（检查previousConfiguration（WC））;
Log.d（无线preference，添加网络返回+ RES）;
布尔ES = wifi.saveConfiguration（）;
Log.d（无线preference，saveConfiguration返回+ ES）;
布尔B = wifi.enableNetwork（RES，真）;
Log.d（无线preference，enableNetwork返回+ B）;     ConnectivityManager CONNEC =（ConnectivityManager）activity.getSystemService（Context.CONNECTIVITY_SERVICE）;    返回true;
}}

测试活动应该是这样的：

 公共类测试活动扩展了活动{
/ **当第一次创建活动调用。
 * @返回* /@覆盖
公共无效的onCreate（捆绑savedInstanceState）{
super.onCreate（savedInstanceState）;
的setContentView（R.layout.main）;新的连接（本）.execute（）;
}

code未经测试并可能有一些错误，但我希望你明白了吧...

I am using the code below to connect to a wifi network. Is there a way I can delay the output of textview text so that it doesnt display until it is connected to wifi? The message is coming up before it is actually connected.

import java.util.List;
import android.app.Activity;
import android.os.Bundle;
import android.content.Context;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.net.wifi.WifiConfiguration;
import android.net.wifi.WifiManager;
import android.util.Log;
import android.view.View;
import android.view.View.OnClickListener;

import android.widget.Button;
import android.widget.TextView;

public class TestActivity extends Activity {
/** Called when the activity is first created. 
 * @return */



@Override
public void onCreate(Bundle savedInstanceState) {    
    super.onCreate(savedInstanceState);          


    setContentView(R.layout.main);
    Button OffWifi = (Button)findViewById(R.id.offwifi);
    OffWifi.setOnClickListener(new OnClickListener() { 
      public void onClick(View v) {   

          WifiManager wifiManager = (WifiManager)getBaseContext().getSystemService(Context.WIFI_SERVICE);
            wifiManager.setWifiEnabled(false);          
          }        
      });


    TextView tv= (TextView) findViewById(R.id.tv); 

    WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); 
    WifiConfiguration wc = new WifiConfiguration();  
    wc.SSID = "\"Test\""; //IMP! This should be in Quotes!! 

    wc.hiddenSSID = true; 
    wc.status = WifiConfiguration.Status.ENABLED;      
    wc.priority = 10; 
    wc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK); 
    wc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);  
    wc.allowedProtocols.set(WifiConfiguration.Protocol.WPA); 
    wc.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN); 
    wc.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED); 
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP); 
    wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP); 
    wc.preSharedKey = "\"Password\""; 
    WifiManager  wifiManag = (WifiManager) this.getSystemService(WIFI_SERVICE); 
    boolean res1 = wifiManag.setWifiEnabled(true); 
    int res = wifi.addNetwork(checkPreviousConfiguration(wc)); 
    Log.d("WifiPreference", "add Network returned " + res ); 
    boolean es = wifi.saveConfiguration(); 
    Log.d("WifiPreference", "saveConfiguration returned " + es ); 
    boolean b = wifi.enableNetwork(res, true);    
    Log.d("WifiPreference", "enableNetwork returned " + b );   



         ConnectivityManager connec = (ConnectivityManager)getSystemService(Context.CONNECTIVITY_SERVICE); 

         if (connec != null && (connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED) ||(connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED)){  

             tv.setText("You are now connected!  " +  "Version 1.1"); 
            }else if (connec.getNetworkInfo(0).getState() == NetworkInfo.State.DISCONNECTED ||  connec.getNetworkInfo(1).getState() == NetworkInfo.State.DISCONNECTED ) {              

                tv.setText("The was an error connecting, please try again."); 
            }  

    }     




 public WifiConfiguration checkPreviousConfiguration(WifiConfiguration wc) {
WifiManager wifi = (WifiManager) getSystemService(Context.WIFI_SERVICE); 
 List<WifiConfiguration> configs = wifi.getConfiguredNetworks();     
    for(WifiConfiguration config : configs) {         
        if(config.SSID.equals(wc.SSID)) return config;     
        }     
    return wc; 
    } 

}

解决方案

Use AsyncTask and put connecting in the doInBackground, setText put into the onPostExecute

public class Connect extends AsyncTask<String, Void, Boolean> {

private Activity activity;
private Context context;

public LoadContacts(Activity activity){
    this.activity=activity;
    context = activity;
}

@Override
protected void onPreExecute() {
    // TODO Auto-generated method stub
    super.onPreExecute();

}

@Override
protected void onPostExecute(Boolean result) {
    TextView tv= (TextView) activity.findViewById(R.id.tv); 
    if (connec != null && (connec.getNetworkInfo(1).getState() == NetworkInfo.State.CONNECTED) ||(connec.getNetworkInfo(0).getState() == NetworkInfo.State.CONNECTED)){  

         tv.setText("You are now connected!  " +  "Version 1.1"); 
        }else if (connec.getNetworkInfo(0).getState() == NetworkInfo.State.DISCONNECTED ||  connec.getNetworkInfo(1).getState() == NetworkInfo.State.DISCONNECTED ) {              

            tv.setText("The was an error connecting, please try again."); 
        }
    super.onPostExecute();
}

@Override
protected Boolean doInBackground(String... params) {
    WifiManager wifi = (WifiManager) activity.getSystemService(Context.WIFI_SERVICE); 
WifiConfiguration wc = new WifiConfiguration();  
wc.SSID = "\"Test\""; //IMP! This should be in Quotes!! 

wc.hiddenSSID = true; 
wc.status = WifiConfiguration.Status.ENABLED;      
wc.priority = 10; 
wc.allowedKeyManagement.set(WifiConfiguration.KeyMgmt.WPA_PSK); 
wc.allowedProtocols.set(WifiConfiguration.Protocol.RSN);  
wc.allowedProtocols.set(WifiConfiguration.Protocol.WPA); 
wc.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.OPEN); 
wc.allowedAuthAlgorithms.set(WifiConfiguration.AuthAlgorithm.SHARED); 
wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.CCMP); 
wc.allowedPairwiseCiphers.set(WifiConfiguration.PairwiseCipher.TKIP); 
wc.preSharedKey = "\"Password\""; 
WifiManager  wifiManag = (WifiManager) context.getSystemService(WIFI_SERVICE); 
boolean res1 = wifiManag.setWifiEnabled(true); 
int res = wifi.addNetwork(checkPreviousConfiguration(wc)); 
Log.d("WifiPreference", "add Network returned " + res ); 
boolean es = wifi.saveConfiguration(); 
Log.d("WifiPreference", "saveConfiguration returned " + es ); 
boolean b = wifi.enableNetwork(res, true);    
Log.d("WifiPreference", "enableNetwork returned " + b );   



     ConnectivityManager connec = (ConnectivityManager) activity.getSystemService(Context.CONNECTIVITY_SERVICE); 

    return true;
}

}

TestActivity should look like this:

public class TestActivity extends Activity {
/** Called when the activity is first created. 
 * @return */

@Override
public void onCreate(Bundle savedInstanceState) {    
super.onCreate(savedInstanceState);          


setContentView(R.layout.main);

new Connect(this).execute();
}

Code was not tested and might have some errors, but I hope you get the point...

这篇关于我怎样才能延缓TextView的输出？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！

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