实现 像网易云音乐 播放列表那样的弹出型Dialog

public class MyDialog extends Dialog {
    Context mContext;

    public MyDialog(Context context){
        super(context,R.style.MyDialog);
        mContext = context;
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.clearpan);
    }

    @Override
    public void show() {
        super.show();
        /**
         * 设置宽度全屏，要设置在show的后面
         */
        WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
        layoutParams.gravity= Gravity.BOTTOM;
        layoutParams.width= WindowManager.LayoutParams.MATCH_PARENT;
        layoutParams.height= WindowManager.LayoutParams.WRAP_CONTENT;

        getWindow().getDecorView().setPadding(0, 0, 0, 0);

        getWindow().setAttributes(layoutParams);

    }
}

    <style name="mystyle" parent="android:Animation">
        <item name="@android:windowEnterAnimation">@anim/dialog_enter</item>  //进入时的动画
        <item name="@android:windowExitAnimation">@anim/dialog_exit</item>    //退出时的动画
    </style>

    <style name="MyDialog" parent="@android:style/Theme.Holo.Dialog">
        <!-- 是否有边框 -->
        <item name="android:windowFrame">@null</item>
        <!--是否在悬浮Activity之上  -->
        <item name="android:windowIsFloating">true</item>
        <!--标题  -->
        <item name="android:windowNoTitle">true</item>
        <!--阴影  -->
        <item name="android:windowIsTranslucent">true</item><!--半透明-->
        <!-- 进入和退出的动画 -->
        <item name="android:windowAnimationStyle">@style/mystyle</item>

        <!-- 点外边可以消失  -->
        <item name="android:windowCloseOnTouchOutside">true</item>

    </style>

dialog_enter.xml


<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:fromYDelta="100%p"
        android:duration="200"
    />
</set>


dialog_exit.xml

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android">
    <translate
        android:toYDelta="100%p"
        android:duration="200"
    />
</set>

 MyDialog myDialog = new MyDialog(context);
                myDialog.show();