安卓：Java的：TextView中不會變色

Question

我似乎無法弄清楚，爲什麼我的列表行項目不會改變顏色：

/** Populate the Views in act_alliances.xml with data from the database */ 
private void loadAllianceData() { 
    TblAlliances mTAlliances = new TblAlliances(this); 
    mTAlliances.openRead(); 
    Cursor mCursor = mTAlliances.selectSectorData(mSector); 
// load Sector Name into act_alliance_detail.xml 
    TextView mTxtSctName = (TextView) findViewById(R.id.allc_sname); 
    mTxtSctName.setText("Sector: "+mSector); 
    // load the "Number of Alliances" field with the count from the cursor 
    TextView mTxtNumAllcs = (TextView) findViewById(R.id.allc_textView2); 
    mTxtNumAllcs.setText(String.valueOf(mCursor.getCount())); 
    String[] cols = new String[] { 
      mTAlliances.C_FID, 
      mTAlliances.C_FANAME, 
      mTAlliances.C_FPLTC, 
      mTAlliances.C_FSPWER 
      }; 
    int[] to = new int[] { 
      R.id.allc_lstRow_textView1, 
      R.id.allc_lstRow_textView2, 
      R.id.allc_lstRow_invisible, 
      R.id.allc_lstRow_textView3 
      }; 
// connect to the ListView and clear it just in case this isnt the first time 
    ListView mListView = (ListView) findViewById(R.id.allc_listView); 
    mListView.destroyDrawingCache(); 
    mListView.setVisibility(ListView.INVISIBLE); 
    mListView.setVisibility(ListView.VISIBLE); 
// create the adapter using the cursor pointing to the desired data 
    //as well as the layout information 
    SimpleCursorAdapter dataAdapter = new SimpleCursorAdapter(
     this, 
     R.layout.act_alliances_list_row, 
     mCursor, 
     cols, 
     to, 
     0); 
    dataAdapter.setViewBinder(new SimpleCursorAdapter.ViewBinder() { 
     @Override 
     public boolean setViewValue(View view, Cursor cursor, int column) { 
      if(column == 1){ 
       TextView tv = (TextView) view; 
       String mPltc = cursor.getString(cursor.getColumnIndex("FPLTC")); 
       if (BuildConfig.DEBUG) { 
        Log.i(Constants.TAG_ACTALLIANCES, "loadAllianceData(): Political Relation: "+mPltc); 
       } 
       // Set color of item based on Political Relation 
       if(mPltc == "Ally"){tv.setTextColor(Color.parseColor("#6699ff"));} 
       if(mPltc == "Vassal"){tv.setTextColor(Color.parseColor("#00ff00"));} 
       if(mPltc == "Enemy"){tv.setTextColor(Color.parseColor("#ff0000"));} 
       return true; 
      } 
      return false; 
     } 
    }); 
    // Assign adapter to ListView 
    mListView.setAdapter(dataAdapter); 
    mListView.setOnItemClickListener(new OnItemClickListener() { 
     public void onItemClick(AdapterView<?> arg0, View arg1, int arg2, long arg3) { 
      // selected item 
      mAllianceForDetail = ((TextView) arg1.findViewById(R.id.allc_lstRow_textView2)).getText().toString(); 

      startAct("AllianceDetail"); 
     } 
    }); 
    mTAlliances.close(); 
} 

一切都在SimpleCursorAdapter.ViewBinder似乎是爲了，但顏色不會改變......我懷疑它可能是我在哪裏放置的ViewBinder比ViewBinder本身更多。

任何幫助，將不勝感激！

Answer 1

你不能用一個字符串來平衡對象。您需要使用equals或equalsIgnoreCase功能

if (mPltc.equalsIgnoreCase("Ally")){tv.setTextColor(Color.parseColor("#6699ff"));} 
if (mPltc.equalsIgnoreCase("Vassal")){tv.setTextColor(Color.parseColor("#00ff00"));} 
if (mPltc.equalsIgnoreCase("Enemy")){tv.setTextColor(Color.parseColor("#ff0000"));} 
    return true; 

Answer 2

使用

if(mPltc.equals("Ally"))... 

，而不是

if(mPltc == "Ally") 

（同樣的， 「諸侯」， 「敵人」，等等）

你不應該使用==上String對象，嘗試它不會像你所期望的那樣工作。