教你如何最快写出酷炫的dialog对话框

image.png

在实际开发中，系统自带的dialog样式太丑，往往都是自定义一个布局，通过LayoutInflater.inflate(XXX)打一个布局渲染进去的。但是这样做也有缺点，比如下面这张图，你布局里面是不好处理的：

首先，看一下效果图：

image.png

那么遇到这种情况怎么做呢？下面我来分析一下：

一、右边的那个锁是一个状态选择器，我在drawable下面写一个状态选择器,我取名为radio_button_button_selector.xml：

二、改写系统的布局，我取名为：select_dialog_singlechoice.xml 具体如下：

三、然后在activity的布局：

四、最后就是mainactivity里面的代码：

/**
 * 弹窗的背景色的设置
 */
public class MainActivity3 extends AppCompatActivity implements View.OnClickListener{
    private CharSequence[] items = new CharSequence[]{"苹果", "西瓜", "香蕉", "葡萄","你想要啥水果自己选。。"};
    
    private Button mButton;
    
    ArrayAdapter adapter;
    
    @Override
    protected void onCreate(@Nullable Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main3);
        mButton = (Button) findViewById(R.id.button3);
        mButton.setOnClickListener(this);

        ArrayList chooseTypeList = new ArrayList<>();

        SpannableStringBuilder builder1 = new SpannableStringBuilder();
        SpannableString ss1 = new SpannableString("湖北省 - 省会 - 武汉市");
        //设置字体(default,default-bold,monospace,serif,sans-serif)
        ss1.setSpan(new TypefaceSpan("monospace"), 0,3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        //设置字体大小（绝对值,单位：像素）
        //第二个参数 如果为true，表示前面的字体大小单位为dip，否则为像素
        ss1.setSpan(new AbsoluteSizeSpan(60), 0,3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.BLACK), 0,
                1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.rgb(255,0,0)),1,
                2, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.rgb(255,165,0)), 2,
                3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.rgb(255,255,0)), 6,
                7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.rgb(0,255,0)), 7,
                8, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.rgb(0,127,255)), 11,
                12, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.rgb(0,0,255)), 12,
                13, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss1.setSpan(new ForegroundColorSpan(Color.rgb(139,0,255)), 13,
                ss1.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        builder1.append(ss1);

        SpannableStringBuilder builder2 = new SpannableStringBuilder();
        SpannableString ss2 = new SpannableString("浙江省 - 省会 - 杭州市");
        //设置字体(default,default-bold,monospace,serif,sans-serif)
        ss2.setSpan(new TypefaceSpan("monospace"), 0,3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.BLACK), 0,
                1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.rgb(255,0,0)),1,
                2, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.rgb(255,165,0)), 2,
                3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.rgb(255,255,0)), 6,
                7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.rgb(0,255,0)), 7,
                8, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.rgb(0,127,255)), 11,
                12, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.rgb(0,0,255)), 12,
                13, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss2.setSpan(new ForegroundColorSpan(Color.rgb(139,0,255)), 13,
                ss2.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        builder2.append(ss2);

        SpannableStringBuilder builder3 = new SpannableStringBuilder();
        SpannableString ss3 = new SpannableString("江苏省 - 省会 - 南京市");
        //设置字体(default,default-bold,monospace,serif,sans-serif)
        ss3.setSpan(new TypefaceSpan("monospace"), 0,3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.BLACK), 0,
                1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.rgb(255,0,0)),1,
                2, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.rgb(255,165,0)), 2,
                3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.rgb(255,255,0)), 6,
                7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.rgb(0,255,0)), 7,
                8, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.rgb(0,127,255)), 11,
                12, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.rgb(0,0,255)), 12,
                13, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss3.setSpan(new ForegroundColorSpan(Color.rgb(139,0,255)), 13,
                ss3.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        builder3.append(ss3);

        SpannableStringBuilder builder4 = new SpannableStringBuilder();
        SpannableString ss4 = new SpannableString("广东省 - 省会 - 广州市");
        //设置字体(default,default-bold,monospace,serif,sans-serif)
        ss4.setSpan(new TypefaceSpan("monospace"), 0,3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.BLACK), 0,
                1, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.rgb(255,0,0)),1,
                2, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.rgb(255,165,0)), 2,
                3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.rgb(255,255,0)), 6,
                7, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.rgb(0,255,0)), 7,
                8, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.rgb(0,127,255)), 11,
                12, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.rgb(0,0,255)), 12,
                13, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        ss4.setSpan(new ForegroundColorSpan(Color.rgb(139,0,255)), 13,
                ss4.length(), Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
        builder4.append(ss4);

        chooseTypeList.add(builder1);
        chooseTypeList.add(builder2);
        chooseTypeList.add(builder3);
        chooseTypeList.add(builder4);

        adapter = new ArrayAdapter<>(
                this, R.layout.select_dialog_singlechoice, R.id.text1, chooseTypeList);
        }

    @Override
    public void onClick(View v) {
        AlertDialog.Builder builder = new AlertDialog.Builder(this);

        builder.setSingleChoiceItems(adapter, 0, new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                Toast.makeText(MainActivity3.this, items[which], Toast.LENGTH_SHORT).show();
            }
        })
        .setPositiveButton("确定", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        })
        .setNegativeButton("取消", new DialogInterface.OnClickListener() {
            @Override
            public void onClick(DialogInterface dialog, int which) {
                dialog.dismiss();
            }
        })
        .show();
    }
}

最终效果如下，是不是很酷炫？

image.png