目的：實(shí)現(xiàn)一個(gè)自定義dialog，用于退出，從底部滑入和滑出

要解決的問(wèn)題：

1.dialog的位置要修改到底部；

2.dialog有默認(rèn)的padding，要去這些padding，讓dialog于屏幕同寬；（這個(gè)無(wú)法通過(guò)設(shè)置Gravity.width辦到）

3.dialog的滑入和滑出動(dòng)畫(huà)；（style中有enter和exit Animation屬性）

解決方案：

示例：寫一個(gè)LogoutDialog繼承自Dialog類

關(guān)于問(wèn)題1和2：

    Window window = this.getWindow();
    
    //去掉dialog的title，要在setContentView（）前
    window.requestFeature(Window.FEATURE_NO_TITLE);
    
    setContentView(R.layout.layout_logout_confirm);
    
    //去掉dialog默認(rèn)的padding
    window.getDecorView().setPadding(0, 0, 0, 0);
    
    WindowManager.LayoutParams lp = window.getAttributes();
    lp.width = WindowManager.LayoutParams.MATCH_PARENT;
    lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
    
    //設(shè)置dialog的位置在底部
    lp.gravity = Gravity.BOTTOM;
    
    window.setAttributes(lp);

給dialog加入動(dòng)畫(huà)

    給dialog設(shè)置一個(gè)style，在style中設(shè)置，也可以在代碼中寫（但是相對(duì)繁瑣）。
    
    WindowManager.LayoutParams lp = window.getAttributes();
    lp.windowAnimations = R.style.MyDialogAnimation;//設(shè)置Animation，style中做了設(shè)置，此處可不寫

style ：

<style name="MyDialogStyle" parent="@android:style/Theme.Dialog">
    <item name="android:windowAnimationStyle">@style/MyDialogAnimation</item>
</style>

<style name="MyDialogAnimation">
    <item name="android:windowEnterAnimation">@anim/dialog_slide_up</item>
    <item name="android:windowExitAnimation">@anim/dialog_slide_down</item>
</style>

anim :

dialog_slide_down：

<set xmlns:android="http://schemas.android.com/apk/res/android">

<translate
    android:duration="300"
    android:fromYDelta="0"
    android:toYDelta="100%p"/>
</set>

dialog_slide_up:

<set xmlns:android="http://schemas.android.com/apk/res/android">

<translate
    android:duration="300"
    android:fromYDelta="100%p"
    android:toYDelta="0"/>
</set>

完整代碼：

public class MyLogoutConfirmDialog extends Dialog implements View.OnClickListener {
    @ViewInject(id = R.id.logout_dialog_exit, click = true)
    RelativeLayout exitButton;

    @ViewInject(id = R.id.logout_dialog_cancel, click = true)
    RelativeLayout cancelButton;

    MyDialogClickListener myDialogClickListener;

    public MyLogoutConfirmDialog(Context context, MyDialogClickListener myDialogClickListener) {
        super(context, R.style.MyDialogStyle);
        this.myDialogClickListener = myDialogClickListener;
        init();
    }

    private void init() {
        Window window = this.getWindow();
        window.requestFeature(Window.FEATURE_NO_TITLE);
        setContentView(R.layout.layout_logout_confirm);
        ViewInjectUtils.initInjectedView(this, window.getDecorView());
        window.getDecorView().setPadding(0, 0, 0, 0);
        WindowManager.LayoutParams lp = window.getAttributes();
        lp.windowAnimations = R.style.MyDialogAnimation;
        lp.width = WindowManager.LayoutParams.MATCH_PARENT;
        lp.height = WindowManager.LayoutParams.WRAP_CONTENT;
        lp.gravity = Gravity.BOTTOM;
        window.setAttributes(lp);
        show();
    }

    @Override
    public void onClick(View v) {
        switch (v.getId()) {
            case R.id.logout_dialog_exit:
                dismiss();
                myDialogClickListener.exit();
                break;
            case R.id.logout_dialog_cancel:
                dismiss();
                break;
        }
    }

    public interface MyDialogClickListener {
        void exit();
    }

}

THE END