教你如何最快寫出酷炫的dialog對話框

image.png

在實際開發(fā)中，系統(tǒng)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：

image.png
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(tài)選擇器，我在drawable下面寫一個狀態(tài)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>
二、改寫系統(tǒng)的布局，我取名為：select_dialog_singlechoice.xml 具體如下：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

    <CheckedTextView
        xmlns: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>
三、然后在activity的布局：
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">

   <Button
    android:id="@+id/button3"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="點擊就有彈窗"/>

</LinearLayout>
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;
    
    @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<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?。ń^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);
        }

    @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("確定", 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();
    }
}
最終效果如下，是不是很酷炫？
image.png
最后編輯于 ：
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