java - .setBackgroundResource 使我的应用程序崩溃

Question

在应用程序中，每当我尝试检查灰色选项并单击我的按钮时，我的应用程序就会崩溃。所有其他单选按钮都工作得很好，但每当我尝试通过灰色按钮更改布局的背景颜色时，应用程序崩溃。P.S 当我从代码中删除 instructionlayout.setBackgroundResource(R.color.grey); 时，灰色也能正常工作并烤成“灰色”。请帮助我了解如何更改所有布局上的背景颜色而不会使应用程序崩溃。

public void setter(View setv)
{
    RelativeLayout instructionlayout = (RelativeLayout)findViewById(R.id.instructionslayout);
    switch(setv.getId())
    {
        case R.id.changecolorbtn:
            int id = SelectedRadioButton();
            switch(id)
            {
                case 1:toost("Original");break;
                case 2:toost("Grey");instructionlayout.setBackgroundResource(R.color.grey);break;//problem is here
                case 3:toost("Red");break;
                case 4:toost("Orange");break;
                case 5:toost("Yellow");break;
                case 6:toost("Green");break;
                case 7:toost("Aqua");break;
                case 8:toost("Marine");break;
                case 9:toost("Purple");break;
                case 10:toost("Silver");break;
                default:toost("Error! - Select An Option!");
            }
            break;
    }
}
public int SelectedRadioButton()
{
    RadioButton original = (RadioButton)findViewById(R.id.origcolor);
    RadioButton grey = (RadioButton)findViewById(R.id.grey);
    RadioButton red = (RadioButton)findViewById(R.id.red);
    RadioButton orange = (RadioButton)findViewById(R.id.orange);
    RadioButton yellow = (RadioButton)findViewById(R.id.yellow);
    RadioButton green = (RadioButton)findViewById(R.id.green);
    RadioButton aqua = (RadioButton)findViewById(R.id.aqua);
    RadioButton marine = (RadioButton)findViewById(R.id.marine);
    RadioButton purple = (RadioButton)findViewById(R.id.purple);
    RadioButton silver = (RadioButton)findViewById(R.id.silver);
    int starter = 1;
    switch(starter)//take advantage of switch falling without break statement
    {
        case 1:if(original.isChecked()){return 1;}
        case 2:if(grey.isChecked()){return 2;}
        case 3:if(red.isChecked()){return 3;}
        case 4:if(orange.isChecked()){return 4;}
        case 5:if(yellow.isChecked()){return 5;}
        case 6:if(green.isChecked()){return 6;}
        case 7:if(aqua.isChecked()){return 7;}
        case 8:if(marine.isChecked()){return 8;}
        case 9:if(purple.isChecked()){return 9;}
        case 10:if(silver.isChecked()){return 10;}
    }
    return -1;//if nothing is checked
}

颜色.xml:

<resources>
<color name="original">#25383C</color>
<color name="grey">#484849</color>
<color name="red">#881A27</color>
<color name="orange">#ffa500</color>
<color name="yellow">#CDE707</color>
<color name="green">#00ff00</color>
<color name="aqua">#00FFCC</color>
<color name="marine">#0C0C84</color>
<color name="purple">#630A86</color>
<color name="silver">#c0c0c0</color>
</resources>

日志猫:

10-22 10:32:49.834  17834-17834/dhruvyadav.msplit E/AndroidRuntime﹕ FATAL EXCEPTION: main
Process: dhruvyadav.msplit, PID: 17834
java.lang.IllegalStateException: Could not execute method of the activity
        at android.view.View$1.onClick(View.java:3983)
        at android.view.View.performClick(View.java:4654)
        at android.view.View$PerformClick.run(View.java:19438)
        at android.os.Handler.handleCallback(Handler.java:733)
        at android.os.Handler.dispatchMessage(Handler.java:95)
        at android.os.Looper.loop(Looper.java:146)
        at android.app.ActivityThread.main(ActivityThread.java:5602)
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1283)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1099)
        at dalvik.system.NativeStart.main(Native Method)
 Caused by: java.lang.reflect.InvocationTargetException
        at java.lang.reflect.Method.invokeNative(Native Method)
        at java.lang.reflect.Method.invoke(Method.java:515)
        at android.view.View$1.onClick(View.java:3978)

我已经尝试过:

 View instructionlayout = (View)findViewById(R.id.instructionslayout);
 instructionlayout.setBackgroundColor(R.color.grey);

如何在 .setBackground 代码之间放置 ui 线程？

 

Answer 1

你使用setBackgroundColor

yourView.setBackgroundColor(R.color.your_color);