更改颜色或自定义按钮

Question

嗨我做了一个自定义的圆角按钮（gps_button），它的作品，但我想改变按钮的颜色取决于它的状态条件，但颜色不变。颜色变量存储在Colors.xml中

我的主要问题是如何将Color.xml中的颜色设置为我的自定义按钮？

这是我的代码主要活动：

public void start_gps (View view){ 

gps_button = (Button) (findViewById(R.id.start_gps_button)); 

if ((log_state == true) && (start_gps_button_state == false)){ 

      start_gps_button_state = true; 
      gps_button.setBackgroundColor(R.color.startGpsColor); 
      gps_button.setText("STOP"); 
      voyagePoints.setText("0"); 

      Toast.makeText(this, "GPS Started", Toast.LENGTH_SHORT).show(); 

     }else if ((log_state == true) && start_gps_button_state == true){ 

      start_gps_button_state = false; 
      gps_button.setBackgroundColor(R.color.stopGpsColor); 
      gps_button.setText("START"); 

      Toast.makeText(this, "GPS Stopped", Toast.LENGTH_SHORT).show(); 
     } 
    } 

这是自定义按钮：

<?xml version="1.0" encoding="utf-8"?> 

<selector xmlns:android="http://schemas.android.com/apk/res/android" > 
    <item android:state_pressed="true" > 
     <shape android:shape="rectangle" > 
      <corners android:radius="10dip" /> 
      <stroke android:width="1dip" android:color="#1EB7F1" /> 
      <gradient android:angle="-90" android:startColor="#1EB7F1" android:endColor="#1EB7F1" /> 
     </shape> 
    </item> 
    <item android:state_focused="true"> 
     <shape android:shape="rectangle" > 
      <corners android:radius="10dip" /> 
      <stroke android:width="1dip" android:color="#1EB7F1" /> 
      <solid android:color="#1EB7F1"/> 
     </shape> 
    </item> 
    <item > 
     <shape android:shape="rectangle" > 
      <corners android:radius="10dip" /> 
      <stroke android:width="1dip" android:color="#1EB7F1" /> 
      <gradient android:angle="-90" android:startColor="#1EB7F1" android:endColor="#1EB7F1" /> 
     </shape> 
    </item> 
</selector> 

这是Color.xml

<?xml version="1.0" encoding="utf-8"?> 
<resources> 
    <color name="colorPrimary">#A7E483</color> 
    <color name="colorPrimaryDark">#A7E483</color> 
    <color name="colorAccent">#FF4081</color> 
    <color name="stopGpsColor">#F9108E</color> 
    <color name="startGpsColor">#1EB7F1</color> 
</resources> 

Answer 1

见this question。你必须使用button.setBackgroundColor(getResources().getColor(R.color.colorPrimary));

Answer 2

我得到它的工作，发现它也从这里https://stackoverflow.com/a/34057311/1515105

gps_button.setBackgroundTintList(ColorStateList.valueOf(ContextCompat.getColor(this, R.color.startGpsColor)));