類型數組在getTypedArray調用後爲空

我有一個簡單的谷歌地圖實現，我用我的strings.xml中的雙精度填充兩個類型數組，所以我可以使用它們來填充經度和緯度。類型數組在getTypedArray調用後爲空

這裏是方法：

@Override 
public void onMapReady(GoogleMap map) { 

    map.setMyLocationEnabled(true); 
    TypedArray lats = getResources().obtainTypedArray(R.array.Lats); 
    TypedArray longs = getResources().obtainTypedArray(R.array.Longs); 
    int length = longs.getIndexCount(); 
    Log.e("MY APP LOG", "here"); 
    Log.e("MY APP LOG", "length = " + length); 
    for(int i = 0; i < length; i++) 
    { 
     LatLng coord = new LatLng(lats.getFloat(i,0),longs.getFloat(i,0)); 
     Log.e("MY APP LOG", "here2"); 
     Log.e("MY APP LOG", "latitude = " + lats.getFloat(i,0)); 

     map.addMarker(new MarkerOptions() 
       .title("Sydney") 
       .snippet("The most populous city in Australia.") 
       .position(coord)); 
    } 
    LatLng coord = new LatLng(lats.getFloat(0,0),longs.getFloat(0,0)); 

    map.moveCamera(CameraUpdateFactory.newLatLngZoom(coord, 13)); 


}

我的strings.xml：

<array name="Lats"> 
    <item>-33.867</item> 
    <item>-33.869</item> 
    <item>-33.871</item> 
    <item>-33.873</item> 
    <item>-33.876</item> 
    <item>-33.881</item> 
    <item>-33.883</item> 
    <item>-33.885</item> 
    <item>-33.891</item> 
</array> 

<array name="Longs"> 
    <item>151.206</item> 
    <item>151.209</item> 
    <item>151.211</item> 
    <item>151.205</item> 
    <item>151.204</item> 
    <item>151.207</item> 
    <item>151.203</item> 
    <item>151.201</item> 
    <item>151.200</item> 
</array>

的logcat中顯示：

04-30 05:00:00.727 24986-24986/com.example.andrew.ubair4 E/MY APP LOG﹕ here 
04-30 05:00:00.727 24986-24986/com.example.andrew.ubair4 E/MY APP LOG﹕ length = 0

來源

2015-04-30 Andrew Tsay

我想你必須嘗試整數數組：http://developer.android.com/guide/topics/resources/more-resources.html#IntegerArray –

@HareshChhelana它會攜帶小數？ –

然後嘗試在String-Array中將其定義爲String，並在使用時將其轉換爲double。 –

嘗試在字符串資源定義拉特和長爲String-Array ：

<string-array name="lats"> 
    <item>-33.867</item> 
    <item>-33.869</item> 
    <item>-33.871</item> 
    <item>-33.873</item> 
    <item>-33.876</item> 
    <item>-33.881</item> 
    <item>-33.883</item> 
    <item>-33.885</item> 
    <item>-33.891</item> 
</string-array> 

<string-array name="longs"> 
    <item>151.206</item> 
    <item>151.209</item> 
    <item>151.211</item> 
    <item>151.205</item> 
    <item>151.204</item> 
    <item>151.207</item> 
    <item>151.203</item> 
    <item>151.201</item> 
    <item>151.200</item> 
</string-array> 

String[] lats = getResources().getStringArray(R.array.lats); 
String[] longs = getResources().getStringArray(R.array.longs); 

for(int i=0;i<longs.length;i++){ 
    LatLng coord = new LatLng(Double.parseDouble(lats[i]),Double.parseDouble(longs[i])); 
    map.addMarker(new MarkerOptions() 
     .title("Sydney") 
     .snippet("The most populous city in Australia.") 
     .position(coord)); 
}

來源

2015-04-30 12:40:55

類型數組在getTypedArray調用後爲空

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