问题
EDIT:A Pastebin consisting of the relevant parts of my project:
Here is the updated code
Also ColouredItem is a wrapper for:
public class ColouredItem
{//Only a wrapper class,no behaviour has been defined here
String name,colour;
}
I get a NumberFormatException when trying to parse a colour from a String using the following code:
row.setBackgroundColor(Color.parseColor(item.colour));
I use the following to create a list of items from a resource:
for(int i=0;i<list.length;i++)
{
item=new ColouredMenuItem();
String[] cmenu =list[i].split("#");
item.name=cmenu[0];
item.colour="#"+cmenu[1];
Log.d(TAG, item.colour);
menuList.add(item);
}
This is the exception that I get...I have found that view.setBackgroundColor only takes an integer value:
#ffffff
#ffffBB
#fff45f
#ffff00
Shutting down VM
threadid=1: thread exiting with uncaught exception (group=0x4001d800)
FATAL EXCEPTION: main
java.lang.NumberFormatException: ffffff
at java.lang.Long.parse(Long.java:364)
at java.lang.Long.parseLong(Long.java:354)
at android.graphics.Color.parseColor(Color.java:207)
at com.example.samplelistproject.MadAdapter.getView(MadAdapter.java:60)
at android.widget.AbsListView.obtainView(AbsListView.java:1315)
at android.widget.ListView.makeAndAddView(ListView.java:1727)
at android.widget.ListView.fillDown(ListView.java:652)
at android.widget.ListView.fillFromTop(ListView.java:709)
at android.widget.ListView.layoutChildren(ListView.java:1580)
at android.widget.AbsListView.onLayout(AbsListView.java:1147)
at android.view.View.layout(View.java:7035)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7035)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1249)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1125)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1042)
at android.view.View.layout(View.java:7035)
at android.widget.FrameLayout.onLayout(FrameLayout.java:333)
at android.view.View.layout(View.java:7035)
at android.view.ViewRoot.performTraversals(ViewRoot.java:1045)
at android.view.ViewRoot.handleMessage(ViewRoot.java:1727)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:123)
at android.app.ActivityThread.main(ActivityThread.java:4627)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:521)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
at dalvik.system.NativeStart.main(Native Method)
Adding the # as some of the answers suggest did not solve the issue:
java.lang.NumberFormatException: Invalid long: "#ffffff"
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2211)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2261)
at android.app.ActivityThread.access$600(ActivityThread.java:141)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1256)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:5103)
at java.lang.reflect.Method.invokeNative(Native Method)
No difference with this implementation either:
String cmenu=list[i];
item.name=cmenu.substring(0, cmenu.indexOf("#"));
item.colour=cmenu.substring(cmenu.indexOf("#"));
回答1:
Use this code
row.setBackgroundColor(Color.parseColor("#424242"));
it helped me too,dont remove "#".
i used this code
private List<String> item;
item = new ArrayList<String>();
item.add("#424242");
row.setBackgroundColor(Color.parseColor(item.get(0)));
and its working gud for me,may be your split thing is not working good
or for your code
Button btn;
ColouredMenuItem item;
ArrayList<ColouredMenuItem> menuList = new ArrayList<ColouredMenuItem>();
String[] list = new String[] { "Page1 #ffffff", "Page2 #ffffBB" };
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.sample);
try {
btn = (Button) findViewById(R.id.button1);
for (int i = 0; i < list.length; i++) {
item = new ColouredMenuItem();
String[] cmenu = list[i].split("#");
item.name = cmenu[0];
item.color = "#" + cmenu[1];
Log.d("colored", item.color);
menuList.add(item);
}
btn.setBackgroundColor(Color.parseColor(menuList.get(1).color));
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
this is working good at my side
this is new code
Make your colored item as a bean class with getter and setter like this
public class ColouredMenuItem {// Only a wrapper class,no behaviour has been defined
// here
String name, colour;
List<ColouredMenuItem> list=new ArrayList<ColouredMenuItem>();
public List<ColouredMenuItem> getList() {
return list;
}
public void setList(List<ColouredMenuItem> menuList) {
this.list = menuList;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getColour() {
return colour;
}
public void setColour(String colour) {
this.colour = colour;
}
}
Then in your adapter use this code
try {
Log.d(TAG, menuList.get(position).colour);
textView.setText(menuList.get(position).getName());
{
row.setBackgroundColor(Color.parseColor(menuList.get(position).getColour()));
}
} catch (Exception ex) {
Log.e(TAG, "Still does not work");
}
Just give it a try,it works here at my side
Also your array is like this only na
<string-array name="menu_array">
<item>Page1 #ff7788</item>
<item>Page1 #ff6688</item>
<item>Page1 #424242</item>
</string-array>
回答2:
Try Color.parseColor("#ffffff"); instead of Color.parseColor("ffffff");
回答3:
look at the Stack trace it will tell you:
java.lang.NumberFormatException: ffffff
at java.lang.Long.parse(Long.java:364)
at java.lang.Long.parseLong(Long.java:354)
at android.graphics.Color.parseColor(Color.java:207)
at com.example.samplelistproject.MadAdapter.getView(MadAdapter.java:60)
Line by Line:
you are trying to format Hexadecimal (base 16) value "0xffffff" to a decimal (base 10) value
you're trying to parse hexadecimal string "ffffff" to type Long
same as above.
error is thrown when calling `Color.parseColor()`
error is thrown from your MadAdapter.java Class on line 60.
so, you need to find a way to parse it from Hexadecimal instead of decimal value. Hexadecimal values are usually preceeded by 0x[value] OR #[value]
回答4:
Assuming: while parsing the color from string object "item" is not taken from array of list, rather its taking instance variable of ColoureMenuItem.
ColouredMenuItem item;
ArrayList<ColouredMenuItem> menuList = new ArrayList<ColouredMenuItem>();
String[] list = new String[]{"#ffffff","#00ffff"};
// parsing your string here, no change in this
for(int i=0;i<list.length;i++)
{
item=new ColouredMenuItem();
String[] cmenu =list[i].split("#");
item.name=cmenu[0];
item.color="#"+cmenu[1];
Log.d("colored", item.color);
menuList.add(item);
}
// confirming whether value are parsing or not.
for(int i=0;i<menuList.size();i++)
{
int color = Color.parseColor(menuList.get(i).color);
Log.d("color",""+menuList.get(i).color);
}
and your ColouredMenuItem class.
public class ColouredMenuItem {
public String color;
public String name;
}
来源：https://stackoverflow.com/questions/19542572/error-parsing-colors-from-string