Question

我正在尝试使按钮呈圆形，随机背景色？当我尝试下面的代码时，按钮不会被舍入。

以下是代码：

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以使按钮四舍五入？

Answer 1

您将按钮背景设置为可绘制，然后颜色也。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设置。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.

可绘制文件夹中的bkg.xml

<?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

enter image description here

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)]);
    }

Answer 2

看看Document。 view.setBackgroundDrawable(drawable)和b[i].setBackgroundColor(c);您不能同时使用这两者。它只会影响最后一个。

如何同时设置随机颜色和按钮？

2 个答案: