如何设置同时舍入的随机颜色和按钮？

Question

我想让按钮圆形，随机背景颜色？当我尝试下面的代码时，该按钮不是圆形的。

下面是代码：

public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.newtestament); 
    LinearLayout layout = (LinearLayout) findViewById(R.id.linearlayoutnew); 
    String[] values = { "Matthai", "Marka", "Luka", "Johan", 
      "Sawltak Tangthu", "Rom Laikhak", "Korin Masa", "Korin Nihna", 
      "Galati", "Efesa", "Filippi", "Kolose", "Thesalonika Masa", 
      "Thesalonika Nihna", "Timoti Masa", "Timoti Nihna", "Titus", 
      "Filemon", "Hebru", "James", "Peter Masa", "Peter Nihna", 
      "Johan Masa", "Johan Nihna", "Johan Thumna", "Jude", 
      "Maangmuhna" }; 
    Button[] b = new Button[values.length]; 
    for (int i = 0; i < b.length; i++) { 
     b[i] = new Button(this); 
    } 
    int[] btnColor = { 0xAAe60038, 0xAA9142d6, 0xAAf07b04, 0xAA1515ff, 
      0xAA23699e, 0xAA0a71ff, 0xAA3e3d39, 0xAA00b323, 0xAA754e45, 
      0xAAfa061e, 0xAAe66d2d, 0xAAff00ff }; 
    // calling random 
    Random random = new Random(); 
    // ramdomizing a color 
    int c = btnColor[random.nextInt(btnColor.length)]; 
    for (int i = 0; i < values.length; i++) { 

     // applying button rounded xml style 
     b[i].setBackgroundDrawable(getResources().getDrawable(
       R.drawable.round)); 
     // setting randomized color 
     b[i].setBackgroundColor(c); 
     // layout 
     LayoutParams params = new LinearLayout.LayoutParams(
       LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT); 
     // margin 
     ((MarginLayoutParams) params).setMargins(5, 5, 5, 5); 
     // padding 
     b[i].setPadding(10, 10, 10, 10); 
     // text color 
     b[i].setTextColor(0xFFFFFFFF); 
     // text 
     b[i].setText(values[i]); 
     // text size 
     b[i].setTextSize(18); 
     Typeface face = Typeface.createFromAsset(getBaseContext() 
       .getAssets(), "UBUNTU-R.TTF"); 
     b[i].setTypeface(face); 
     layout.addView(b[i], params); 

    } 

} 

这里是round.xml：

<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android" 
android:shape="rectangle" > 

<!-- you can use any color you want I used here gray color --> 
<corners 
    android:bottomLeftRadius="5dp" 
    android:bottomRightRadius="5dp" 
    android:topLeftRadius="5dp" 
    android:topRightRadius="5dp" /> 
    </shape> 

我认为问题是setBackgroundDrawable，setBackgroundColor和romdomizing。需要哪些附加代码？ ???
更新：如何编辑round.xml以使按钮变圆？

Answer 1

请看Document。 view.setBackgroundDrawable(drawable)和b[i].setBackgroundColor(c);你不能同时使用两者。它只会影响到最后一个。

Answer 2

您将按钮背景设置为可绘制，然后颜色也为。所以语句按顺序执行。所以最后你的按钮应该有一个背景颜色集。 因此，请尝试评论其中一个并再次运行代码。

b[i].setBackgroundDrawable(getResources().getDrawable(R.drawable.round)); 
    // set background drawable 
    // first your background drawable will be set 
    b[i].setBackgroundColor(c); 
    //set background color. 

bkg.xml在绘制文件夹

<?xml version="1.0" encoding="utf-8"?> 
<selector xmlns:android="http://schemas.android.com/apk/res/android"> 
<item android:state_pressed="true" 
    android:drawable="@drawable/pressed" /> 
<item android:state_focused="false" 
    android:drawable="@drawable/normal" /> 
</selector> 

normal.xml

<?xml version="1.0" encoding="UTF-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android"> 
<solid android:color="#FFFFFF"/>  
<stroke android:width="3dp" 
     android:color="#0FECFF" /><!-- #330000FF #ffffffff --> 

<padding android:left="5dp" 
     android:top="5dp" 
     android:right="5dp" 
     android:bottom="5dp"/> 
<corners android:bottomRightRadius="7dp" 
     android:bottomLeftRadius="7dp" 
     android:topLeftRadius="7dp" 
     android:topRightRadius="7dp"/> 
</shape> 

pressed.xml

<?xml version="1.0" encoding="UTF-8"?> 
<shape xmlns:android="http://schemas.android.com/apk/res/android"> 
<solid android:color="#FF1A47"/>  
<stroke android:width="3dp" 
     android:color="#0FECFF"/> 
<padding android:left="5dp" 
     android:top="5dp" 
     android:right="5dp" 
     android:bottom="5dp"/> 
<corners android:bottomRightRadius="7dp" 
     android:bottomLeftRadius="7dp" 
     android:topLeftRadius="7dp" 
     android:topRightRadius="7dp"/> 
</shape> 

    b[i].setBackgroundResource(R.drawable.bkg); 

快照

编辑：

int colors []= {Color.RED, Color.BLACK, Color.BLUE,Color.GREEN}; 
    Random r = new Random(); 
    for (int i = 0; i < colors.length; i++) { 
     b[i].setBackgroundColor(colors[r.nextInt(3)]); 
    }