如何根據信號強度按升序對getScanResults（）列表進行排序？

Question

我存儲scanresult到列表作爲每代碼如下：

List<ScanResult> results = wifi.getScanResults(); 
      sb = new StringBuilder(); 
      try 
      { 
       for(int i = 0; i < results.size(); i++){ 
        sb.append(new Integer(i+1).toString() + "."); 
        sb.append("SSID:-").append((results.get(i).SSID).toString()); 
        sb.append("BSSID:-").append((results.get(i).BSSID).toString()); 
        sb.append("Level:-").append((results.get(i).level)); 
        sb.append("Frequency:-").append((results.get(i).frequency)); 
        sb.append("\n\n"); 
       } 
       textStatus.setText(""); 
       textStatus.append("\n\n\n"); 
       textStatus.append(sb); 
      } 

欲基於信號強度（電平）這一結果進行排序，所以我創建具有數據級和Mac的2D陣列。所以我寫的代碼如下：

String rssi[][]=new String[2][results.size()]; 
for(int i = 0; i <results.size(); i++){ 
     rssi[0][i] = String.valueOf(results.get(i).level); 
     rssi[1][i]= results.get(i).BSSID; 
} 

StringBuilder tmp=new StringBuilder(); 
Arrays.sort(rssi,new Comparator<String[]>() { 
     @Override 
     public int compare(String[] str1, String[] str2) { 
      final String lv1= str1[0]; 
      final String lv2= str2[0]; 
      return lv1.compareTo(lv2); 
     } 
); 

基於上面的代碼，我在有序期望rssi[][]，但情況並非如此......

Answer 1

很多試試這個

 Comparator<ScanResult> comparator = new Comparator<ScanResult>() { 
     @Override 
     public int compare(ScanResult lhs, ScanResult rhs) { 
      return (lhs.level <rhs.level ? -1 : (lhs.level==rhs.level ? 0 : 1)); 
     } 
    } 
    List<ScanResult> results = wifi.getScanResults(); 
    Collections.sort(results, comparator); 

    //Here your list is sorted by level