从底部弹出框
private
void
show1() {
Dialog bottomDialog =
new
Dialog(
this
, R.style.BottomDialog);
View contentView = LayoutInflater.from(
this
).inflate(R.layout.dialog_content_normal,
null
);
bottomDialog.setContentView(contentView);
ViewGroup.LayoutParams layoutParams = contentView.getLayoutParams();
layoutParams.width = getResources().getDisplayMetrics().widthPixels;
contentView.setLayoutParams(layoutParams);
bottomDialog.getWindow().setGravity(Gravity.BOTTOM);
bottomDialog.getWindow().setWindowAnimations(R.style.BottomDialog_Animation);
bottomDialog.show();
}
对话框的样式style:
1
2
3
4
|
<style name= "BottomDialog"
parent= "@style/Base.V7.Theme.AppCompat.Light.Dialog" >
<item name= "android:windowNoTitle" >true</item>
<item name= "android:windowBackground" >@android:color/ transparent </item>
</style> |
在对话框中的按钮需要MD风格的波纹效果的话,对话框的style的parent需要设定parent="@style/Base.V7.Theme.AppCompat.Light.Dialog",否则没有效果。同时将对话框所在window的标题去掉。android:windowBackground属性一定要设置成透明,否则自定义形状的对话框背景就是默认的白色了。如果不设置为透明,比如我们通常要设置的圆角对话框就没有效果。
对话框显示时从底部进入,关闭时从底部滑出。动画样式:
1
2
3
4
|
<style name= "BottomDialog.Animation"
parent= "Animation.AppCompat.Dialog" >
<item name= "android:windowEnterAnimation" >@anim/translate_dialog_in</item>
<item name= "android:windowExitAnimation" >@anim/translate_dialog_out</item>
</style> |
tranlate_dialog_in.xml:
1
2
3
4
5
6
7
8
|
<? xml
version = "1.0"
encoding = "utf-8" ?>
android:duration = "300"
android:fromXDelta = "0"
android:fromYDelta = "100%"
android:toXDelta = "0"
android:toYDelta = "0" >
</ translate >
|
tranlate_dialog_out.xml:
1
2
3
4
5
6
7
8
|
<? xml
version = "1.0"
encoding = "utf-8" ?>
android:duration = "300"
android:fromXDelta = "0"
android:fromYDelta = "0"
android:toXDelta = "0"
android:toYDelta = "100%" >
</ translate >
|
实现底部对话框的原理就是修改对话框的内容布局contentView的参数,使它的宽度刚好等于屏幕的宽度,并且设置对话框所在Window的gravity属性为bottom。
需要注意的是,上面代码中需要在调用contentView.getLayoutParams()需要在setContentView方法后,否则获取到的LayoutParams为null,当然也可以自己new一个LayoutParams设置给contentView。
如果是要实现底部圆角对话框,原理也相似,只需要给contentView添加一个圆角的背景shape,并减小contentView的宽度给左右两边留一定的距离,同时给底部设置边距。
1
2
3
4
5
6
7
8
9
10
11
12
|
private
void show2() {
Dialog bottomDialog =
new Dialog( this , R.style.BottomDialog);
View contentView = LayoutInflater.from( this ).inflate(R.layout.dialog_content_circle,
null );
bottomDialog.setContentView(contentView);
ViewGroup.MarginLayoutParams params = (ViewGroup.MarginLayoutParams) contentView.getLayoutParams();
params.width = getResources().getDisplayMetrics().widthPixels - DensityUtil.dp2px( this , 16f);
params.bottomMargin = DensityUtil.dp2px( this , 8f);
contentView.setLayoutParams(params);
bottomDialog.getWindow().setGravity(Gravity.BOTTOM);
bottomDialog.getWindow().setWindowAnimations(R.style.BottomDialog_Animation);
bottomDialog.show();
} |