在實際開發中，系統自帶的dialog樣式太丑，往往都是自定義一個布局，通過LayoutInflater.inflate(XXX)打一個布局渲染進去的。但是這樣做也有缺點，比如下面這張圖，你布局里面是不好處理的：

首先，看一下效果圖：

那么遇到這種情況怎么做呢？下面我來分析一下：

一、右邊的那個鎖是一個狀態選擇器，我在drawable下面寫一個狀態選擇器,我取名為radio_button_button_selector.xml：

<?xml version="1.0" encoding="utf-8"?><selector xmlns:android="http://schemas.android.com/apk/res/android"><item android:drawable="@drawable/ic_radio_button_select" android:state_activated="true"></item><item android:drawable="@drawable/ic_radio_button_select" android:state_pressed="true"></item><item android:drawable="@drawable/ic_radio_button_normal"></item> </selector> 復制代碼

二、改寫系統的布局，我取名為：select_dialog_singlechoice.xml 具體如下：

<?xml version="1.0" encoding="utf-8"?> <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><CheckedTextViewxmlns:android="http://schemas.android.com/apk/res/android"android:id="@+id/text1"android:layout_width="match_parent"android:layout_height="?android:attr/listPreferredItemHeightSmall"android:checkMark="@drawable/radio_button_button_selector"android:gravity="center_vertical"android:paddingEnd="?android:attr/listPreferredItemPaddingEnd"android:paddingStart="?android:attr/listPreferredItemPaddingStart"android:textAppearance="?android:attr/textAppearanceListItemSmall"/> </LinearLayout> 復制代碼

三、然后在activity的布局：

<?xml version="1.0" encoding="utf-8"?> <LinearLayoutxmlns:android="http://schemas.android.com/apk/res/android"android:layout_width="match_parent"android:layout_height="match_parent"android:orientation="vertical"><Buttonandroid:id="@+id/button3"android:layout_width="wrap_content"android:layout_height="wrap_content"android:text="點擊就有彈窗"/></LinearLayout> 復制代碼

四、最后就是mainactivity里面的代碼：

/*** 彈窗的背景色的設置*/ public class MainActivity3 extends AppCompatActivity implements View.OnClickListener{private CharSequence[] items = new CharSequence[]{"蘋果", "西瓜", "香蕉", "葡萄","你想要啥水果自己選。。"};private Button mButton;ArrayAdapter<SpannableStringBuilder> adapter;@Overrideprotected void onCreate(@Nullable Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_main3);mButton = (Button) findViewById(R.id.button3);mButton.setOnClickListener(this);ArrayList<SpannableStringBuilder> chooseTypeList = new ArrayList<>();SpannableStringBuilder builder1 = new SpannableStringBuilder();SpannableString ss1 = new SpannableString("湖北省 - 省會 - 武漢市");//設置字體(default,default-bold,monospace,serif,sans-serif)ss1.setSpan(new TypefaceSpan("monospace"), 0,3, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);//設置字體大小（絕對值,單位：像素）//第二個參數 如果為true，表示前面的字體大小單位為dip，否則為像素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 - 省會 - 杭州市");//設置字體(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("江蘇省 - 省會 - 南京市");//設置字體(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("廣東省 - 省會 - 廣州市");//設置字體(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);}@Overridepublic void onClick(View v) {AlertDialog.Builder builder = new AlertDialog.Builder(this);builder.setSingleChoiceItems(adapter, 0, new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {Toast.makeText(MainActivity3.this, items[which], Toast.LENGTH_SHORT).show();}}).setPositiveButton("確定", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}}).setNegativeButton("取消", new DialogInterface.OnClickListener() {@Overridepublic void onClick(DialogInterface dialog, int which) {dialog.dismiss();}}).show();} } 復制代碼

最終效果如下，是不是很酷炫？

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